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Mark M Dornblaser (Former Employee)

Science and Products

A boat docked near the Shingobee Headwaters research station.

Shingobee Headwaters Aquatic Ecosystems Project (SHAEP)

For 43 years, the Shingobee Headwaters Aquatic Ecosystems Project (SHAEP) brought together scientists from the USGS along with students and professors from universities in Minnesota, North Dakota, Wisconsin, and California to study the physical, chemical, and biological processes of lakes, wetlands, and streams at local and watershed scales. In early 2022, The University of Minnesota and Bemidji...
By
Water Resources Mission Area
Shingobee Headwaters Aquatic Ecosystems Project (SHAEP)

Shingobee Headwaters Aquatic Ecosystems Project (SHAEP)

For 43 years, the Shingobee Headwaters Aquatic Ecosystems Project (SHAEP) brought together scientists from the USGS along with students and professors from universities in Minnesota, North Dakota, Wisconsin, and California to study the physical, chemical, and biological processes of lakes, wetlands, and streams at local and watershed scales. In early 2022, The University of Minnesota and Bemidji...
Learn More

Data from laboratory experiments to assess seasonal carbon, nitrogen, and phosphorus processing in water and sediments from the Illinois River near Starved Rock Lock and Dam, 2022. Data from laboratory experiments to assess seasonal carbon, nitrogen, and phosphorus processing in water and sediments from the Illinois River near Starved Rock Lock and Dam, 2022.

Data on carbon and nutrient processing in key locations and over seasonal time scales can provide critical information about the concentrations and potential utilization rates of bioavailable constituents that are known to have a role in cyanobacteria harmful algal blooms (cyanoHABs). Laboratory experiments were performed to measure seasonal nutrient processing rates of carbon, nitrogen...
By
Water Resources Mission Area

Discrete and high frequency water quality data for Allequash Creek, Wisconsin, WY 2019-2021 Discrete and high frequency water quality data for Allequash Creek, Wisconsin, WY 2019-2021

This data set is a compilation of discrete and high frequency water quality data from sites on Allequash Creek in Wisconsin, and within the Allequash Creek watershed, for the water years (WY) 2019-2021.
By
Water Resources Mission Area

Wetland Stream Water Quality Data for West Twin Creek, AK, Allequash Creek, WI, and Big Thompson River, CO, 2010-2020 Wetland Stream Water Quality Data for West Twin Creek, AK, Allequash Creek, WI, and Big Thompson River, CO, 2010-2020

This dataset includes discrete water quality and discharge data for three streams that flow through wetlands. There are two measurement and sampling locations on each stream: one immediately upstream from the wetland and one immediately downstream from the wetland. Measurements and sample collection occurred in 2010 and 2011 at West Twin Creek, AK; in 2019 and 2020 at Allequash Creek, WI...
By
Water Resources Mission Area, Ecosystems Land Change Science Program

Water quality and gas fluxes of Interior Alaska (2014-2018) Water quality and gas fluxes of Interior Alaska (2014-2018)

This product consists of multiple tabular datasets and associated metadata of water quality information related to rivers, streams, and lakes in the Yukon River watershed between 2014 and 2018. This data release is apart of the National Aeronautics and Space Administration (NASA) funded Arctic-Boreal Vulnerability Experiment (ABoVE) and is an assessment of water quality and greenhouse...
By
Water Resources Mission Area
Image: Instrumentation Array, Beaver Creek Near Michael Lake, Alaska
Instrumentation Array, Beaver Creek Near Michael Lake, Alaska
Instrumentation Array, Beaver Creek Near Michael Lake, Alaska
Image: Instrumentation Array, Beaver Creek Near Michael Lake, Alaska

Instrumentation Array, Beaver Creek Near Michael Lake, Alaska

Instrumentation Array, Beaver Creek Near Michael Lake, Alaska

Instrumentation array with a YSI multiparameter sonde, a dissolved CO2 sensor, and a CDOM sensor.

By
Alaska Science Center, Communications and Publishing
Image: Instrumentation Array, Beaver Creek Near Michael Lake, Alaska

Instrumentation Array, Beaver Creek Near Michael Lake, Alaska

Instrumentation Array, Beaver Creek Near Michael Lake, Alaska

Instrumentation array with a YSI multiparameter sonde, a dissolved CO2 sensor, and a CDOM sensor.

By
Alaska Science Center, Communications and Publishing
Image: Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska
Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska
Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska
Image: Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska

Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska

Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska

Instrumentation array with a YSI multiparameter sonde, a dissolved CO2 sensor, and a CDOM sensor.

By
Alaska Science Center, Communications and Publishing
Image: Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska

Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska

Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska

Instrumentation array with a YSI multiparameter sonde, a dissolved CO2 sensor, and a CDOM sensor.

By
Alaska Science Center, Communications and Publishing
Image: Ice Out on Yukon River, Pilot Station, Alaska
Ice Out on Yukon River, Pilot Station, Alaska
Ice Out on Yukon River, Pilot Station, Alaska
Image: Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Panoramic image of ice break up on the Yukon River at Pilot Station, Alaska.

By
Communications and Publishing
Image: Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Panoramic image of ice break up on the Yukon River at Pilot Station, Alaska.

By
Communications and Publishing
Image: Ice Out on Yukon River, Pilot Station, Alaska
Ice Out on Yukon River, Pilot Station, Alaska
Ice Out on Yukon River, Pilot Station, Alaska
Image: Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Spring breakup on May 21 on the Yukon River at Pilot Station, Alaska.

By
Communications and Publishing
Image: Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Spring breakup on May 21 on the Yukon River at Pilot Station, Alaska.

By
Communications and Publishing
Image: Aerial of Beaver Creek, Alaska
Aerial of Beaver Creek, Alaska
Aerial of Beaver Creek, Alaska
Image: Aerial of Beaver Creek, Alaska

Aerial of Beaver Creek, Alaska

Aerial of Beaver Creek, Alaska

Aquatic ecosystems make a difference in the carbon cycle. The location in this photo is located near Beaver, Alaska approximately 100 miles north of Fairbanks.

By
Ecosystems, Communications and Publishing
Image: Aerial of Beaver Creek, Alaska

Aerial of Beaver Creek, Alaska

Aerial of Beaver Creek, Alaska

Aquatic ecosystems make a difference in the carbon cycle. The location in this photo is located near Beaver, Alaska approximately 100 miles north of Fairbanks.

By
Ecosystems, Communications and Publishing
Image: Fireweed and Beaver Creek, Alaska
Fireweed and Beaver Creek, Alaska
Fireweed and Beaver Creek, Alaska
Image: Fireweed and Beaver Creek, Alaska

Fireweed and Beaver Creek, Alaska

Fireweed and Beaver Creek, Alaska

Fireweed gains a foothold in a burn area of the White Mountains in Alaska.

By
Natural Hazards, Communications and Publishing
Image: Fireweed and Beaver Creek, Alaska

Fireweed and Beaver Creek, Alaska

Fireweed and Beaver Creek, Alaska

Fireweed gains a foothold in a burn area of the White Mountains in Alaska.

By
Natural Hazards, Communications and Publishing
Image: Rainbow Over Yukon River, Eagle, Alaska, June 2002
Rainbow Over Yukon River, Eagle, Alaska, June 2002
Rainbow Over Yukon River, Eagle, Alaska, June 2002
Image: Rainbow Over Yukon River, Eagle, Alaska, June 2002

Rainbow Over Yukon River, Eagle, Alaska, June 2002

Rainbow Over Yukon River, Eagle, Alaska, June 2002

Eagle was our put-in point for our first synoptic cruise down the Yukon River.

By
Alaska Science Center, Communications and Publishing
Image: Rainbow Over Yukon River, Eagle, Alaska, June 2002

Rainbow Over Yukon River, Eagle, Alaska, June 2002

Rainbow Over Yukon River, Eagle, Alaska, June 2002

Eagle was our put-in point for our first synoptic cruise down the Yukon River.

By
Alaska Science Center, Communications and Publishing
Filter Total Items: 40

Linking dissolved organic matter composition to landscape properties in wetlands across the United States of America Linking dissolved organic matter composition to landscape properties in wetlands across the United States of America

Wetlands are integral to the global carbon cycle, serving as both a source and a sink for organic carbon. Their potential for carbon storage will likely change in the coming decades in response to higher temperatures and variable precipitation patterns. We characterized the dissolved organic carbon (DOC) and dissolved organic matter (DOM) composition from 12 different wetland sites...
Authors
Martin R. Kurek, Kimberly Wickland, Natalie A. Nichols, Amy M. McKenna, Steven M. Anderson, Mark M. Dornblaser, Nikaan Koupaie-Abyazani, Brett A. Poulin, Sheel Bansal, Jason B. Fellman, Gregory K. Druschel, Emily S. Bernhardt, Robert G.M. Spencer
By
Ecosystems Mission Area, Ecosystems Land Change Science Program, Geosciences and Environmental Change Science Center, Northern Prairie Wildlife Research Center

Knowledge gaps and opportunities in water-quality drivers of aquatic ecosystem health Knowledge gaps and opportunities in water-quality drivers of aquatic ecosystem health

This report identifies key scientific gaps that limit our ability to predict water quality effects on health of aquatic ecosystems and proposes approaches to address those gaps. Topics considered include (1) coupled nutrient-carbon cycle processes and related ecological-flow-regime drivers of ecosystem health, (2) anthropogenic and geogenic toxin bioexposure, (3) fine sediment drivers of...
By
Water Resources Mission Area

Arctic-boreal lakes of interior Alaska dominated by contemporary carbon Arctic-boreal lakes of interior Alaska dominated by contemporary carbon

Northern high-latitude lakes are critical sites for carbon processing and serve as potential conduits for the emission of permafrost-derived carbon and greenhouse gases. However, the fate and emission pathways of permafrost carbon in these systems remain uncertain. Here, we used the natural abundance of radiocarbon to identify and trace the predominant sources of methane, carbon dioxide...
Authors
Fenix Garcia-Tigreros, Clayton D. Elder, Martin R. Kurek, Benjamin L. Miller, Xiaomei Xu, Kimberly Wickland, Cluadia I. Czimczik, Mark M. Dornblaser, Robert G. Striegl, Ethan D. Kyzivat, Laurence C. Smith, Robert G.M. Spencer, Charles E. Miller, David Butman
By
Geosciences and Environmental Change Science Center

High voltage: The molecular properties of redox-active dissolved organic matter in northern high-latitude lakes High voltage: The molecular properties of redox-active dissolved organic matter in northern high-latitude lakes

Redox-active functional groups in dissolved organic matter (DOM) are crucial for microbial electron transfer and methane emissions. However, the extent of aquatic DOM redox properties across northern high-latitude lakes and their relationships with DOM composition have not been thoroughly described. We quantified electron donating capacity (EDC) and electron accepting capacity (EAC) in...
Authors
Martin R. Kurek, Fenix Garcia-Tigreros, Natalie A. Nichols, Gregory K. Druschel, Kimberly Wickland, Mark M. Dornblaser, Robert G. Striegl, Sydney F. Niles, Amy M. McKenna, Pieter J.K Aukes, Ethan D. Kyzivat, Chao Wang, Laurence C. Smith, Sherry L. Schiff, David Butman, Robert G.M. Spencer
By
Geosciences and Environmental Change Science Center

Dissolved carbon export by large river systems is influenced by source area heterogeneity Dissolved carbon export by large river systems is influenced by source area heterogeneity

Rivers and streams export inorganic and organic carbon derived from contributing landscapes and so downstream carbon fluxes are important quantitative indicators of change in ecosystem function and for the full accounting of terrestrial carbon budgets. Carbon concentration-discharge (C-Q) relationships in rivers provide important information about carbon source and behavior in watersheds...
Authors
Edward G. Stets, Robert G. Striegl, Kimberly Wickland, Mark Dornblaser, Sydney Foks
By
Water Resources Mission Area, Ecosystems Land Change Science Program

Anthropogenic landcover impacts fluvial dissolved organic matter composition in the Upper Mississippi River Basin Anthropogenic landcover impacts fluvial dissolved organic matter composition in the Upper Mississippi River Basin

Landcover changes have altered the natural carbon cycle; however, most landcover studies focus on either forest conversion to agriculture or urban, rarely both. We present differences in dissolved organic carbon (DOC) concentrations and dissolved organic matter (DOM) molecular composition within Upper Mississippi River Basin low order streams and rivers draining one of three dominant...
Authors
Derrick R. Vaughn, Anne M. Kellerman, Kimberly Wickland, Robert G. Striegl, David C. Podgorski, Jon R. Hawkings, Jaap Nienhuis, Mark Dornblaser, Edward G. Stets, Robert G. M. Spencer
By
Water Resources Mission Area, Ecosystems Land Change Science Program, Land Change Science Program

Hydrologic and landscape controls on dissolved organic matter composition across western North American Arctic lakes Hydrologic and landscape controls on dissolved organic matter composition across western North American Arctic lakes

Northern high-latitude lakes are hotspots for cycling dissolved organic carbon (DOC) inputs from allochthonous sources to the atmosphere. However, the spatial distribution of lake dissolved organic matter (DOM) is largely unknown across Arctic-boreal regions with respect to the surrounding landscape. We expand on regional studies of northern high-latitude DOM composition by integrating...
Authors
Martin R. Kurek, Fenix Garcia-Tigreros, Kimberly Wickland, Karen E. Frey, Mark Dornblaser, Robert G. Striegl, Sydney F. Niles, Amy M. McKenna, Pieter J.K Aukes, Ethan D. Kyzivat, Chao Wang, Tamlin M. Pavelsky, Laurence C. Smith, Sherry L. Schiff, David Butman, Robert G.M. Spencer
By
Water Resources Mission Area

Bioavailability of dissolved organic matter varies with anthropogenic landcover in the Upper Mississippi River Basin Bioavailability of dissolved organic matter varies with anthropogenic landcover in the Upper Mississippi River Basin

Anthropogenic conversion of forests and wetlands to agricultural and urban landcovers impacts dissolved organic matter (DOM) within streams draining these catchments. Research on how landcover conversion impacts DOM molecular level composition and bioavailability, however, is lacking. In the Upper Mississippi River Basin (UMRB), water from low-order streams and rivers draining one of...
Authors
Derrick R. Vaughn, Anne M. Kellerman, Kimberly Wickland, Robert G. Striegl, David C. Podgorski, Jon R. Hawkings, Jaap H. Nienhuis, Mark M. Dornblaser, Edward G. Stets, Robert G.M. Spencer
By
Water Resources Mission Area, Ecosystems Land Change Science Program

The importance of lake emergent aquatic vegetation for estimating Arctic-boreal methane emissions The importance of lake emergent aquatic vegetation for estimating Arctic-boreal methane emissions

Areas of lakes that support emergent aquatic vegetation emit disproportionately more methane than open water but are under-represented in upscaled estimates of lake greenhouse gas emissions. These shallow areas are typically less than ∼1.5 m deep and can be detected with synthetic aperture radar (SAR). To assess the importance of lake emergent vegetation (LEV) zones to landscape-scale...
Authors
Ethan D. Kyzivat, Laurence C. Smith, Fenix Garcia-Tigreros, Chang Huang, Chao Wang, Theodore Langhorst, Jessica V. Fayne, Merritt E. Harlan, Yuta Ishitsuka, Dongmei Feng, Wayana Dolan, Lincoln H. Pitcher, Kimberly Wickland, Mark Dornblaser, Robert G. Striegl, Tamlin M. Pavelsky, David E. Butman, Colin J. Gleason
By
Ecosystems Mission Area, Water Resources Mission Area, Cooperative Research Units, Geosciences and Environmental Change Science Center

Spatiotemporal dynamics of CO2 gas exchange from headwater mountain streams Spatiotemporal dynamics of CO2 gas exchange from headwater mountain streams

Mountain streams play an important role in the global carbon cycle by transporting, metabolizing, and exchanging carbon they receive from the terrestrial environment. The rates at which these processes occur remain highly uncertain because of a paucity of observations and the difficulty of measuring gas exchange rates in steep, turbulent mountain streams. This uncertainty is compounded...
Authors
David W. Clow, Robert G. Striegl, Mark Dornblaser
By
Water Resources Mission Area, Ecosystems Land Change Science Program, Land Change Science Program, Colorado Water Science Center

Storm-scale and seasonal dynamics of carbon export from a nested subarctic watershed underlain by permafrost Storm-scale and seasonal dynamics of carbon export from a nested subarctic watershed underlain by permafrost

Subarctic catchments underlain by permafrost sequester a major stock of frozen organic carbon (C), which may be mobilized as the Arctic warms. Warming can impact C export from thawing soils by altering the depth and timing of runoff related to changing storm and fire regimes and altered soil thaw depths. We investigated C export in a first order headwater stream (West Twin Creek) and its...
Authors
Joshua C. Koch, Mark Dornblaser, Rob Striegl
By
Ecosystems Mission Area, Alaska Science Center, Wildland Fire Science

USGS permafrost research determines the risks of permafrost thaw to biologic and hydrologic resources USGS permafrost research determines the risks of permafrost thaw to biologic and hydrologic resources

The U.S. Geological Survey (USGS), in collaboration with university, Federal, Tribal, and independent partners, conducts fundamental research on the distribution, vulnerability, and importance of permafrost in arctic and boreal ecosystems. Scientists, land managers, and policy makers use USGS data to help make decisions for development, wildlife habitat, and other needs. Native villages...
Authors
Mark P. Waldrop, Lesleigh Anderson, Mark Dornblaser, Li H. Erikson, Ann E. Gibbs, Nicole M. Herman-Mercer, Stephanie R. James, Miriam C. Jones, Joshua C. Koch, Mary-Cathrine Leewis, Kristen L. Manies, Burke J. Minsley, Neal J. Pastick, Vijay Patil, Frank Urban, Michelle A. Walvoord, Kimberly P. Wickland, Christian Zimmerman
By
Natural Hazards Mission Area, Water Resources Mission Area, Ecosystems Land Change Science Program, Coastal and Marine Hazards and Resources Program, Land Change Science Program, Volcano Hazards Program, Earth Resources Observation and Science (EROS) Center , Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Geosciences and Environmental Change Science Center, Pacific Coastal and Marine Science Center, Volcano Science Center

Science and Products

A boat docked near the Shingobee Headwaters research station.

Shingobee Headwaters Aquatic Ecosystems Project (SHAEP)

For 43 years, the Shingobee Headwaters Aquatic Ecosystems Project (SHAEP) brought together scientists from the USGS along with students and professors from universities in Minnesota, North Dakota, Wisconsin, and California to study the physical, chemical, and biological processes of lakes, wetlands, and streams at local and watershed scales. In early 2022, The University of Minnesota and Bemidji...
By
Water Resources Mission Area
Shingobee Headwaters Aquatic Ecosystems Project (SHAEP)

Shingobee Headwaters Aquatic Ecosystems Project (SHAEP)

For 43 years, the Shingobee Headwaters Aquatic Ecosystems Project (SHAEP) brought together scientists from the USGS along with students and professors from universities in Minnesota, North Dakota, Wisconsin, and California to study the physical, chemical, and biological processes of lakes, wetlands, and streams at local and watershed scales. In early 2022, The University of Minnesota and Bemidji...
Learn More

Data from laboratory experiments to assess seasonal carbon, nitrogen, and phosphorus processing in water and sediments from the Illinois River near Starved Rock Lock and Dam, 2022. Data from laboratory experiments to assess seasonal carbon, nitrogen, and phosphorus processing in water and sediments from the Illinois River near Starved Rock Lock and Dam, 2022.

Data on carbon and nutrient processing in key locations and over seasonal time scales can provide critical information about the concentrations and potential utilization rates of bioavailable constituents that are known to have a role in cyanobacteria harmful algal blooms (cyanoHABs). Laboratory experiments were performed to measure seasonal nutrient processing rates of carbon, nitrogen...
By
Water Resources Mission Area

Discrete and high frequency water quality data for Allequash Creek, Wisconsin, WY 2019-2021 Discrete and high frequency water quality data for Allequash Creek, Wisconsin, WY 2019-2021

This data set is a compilation of discrete and high frequency water quality data from sites on Allequash Creek in Wisconsin, and within the Allequash Creek watershed, for the water years (WY) 2019-2021.
By
Water Resources Mission Area

Wetland Stream Water Quality Data for West Twin Creek, AK, Allequash Creek, WI, and Big Thompson River, CO, 2010-2020 Wetland Stream Water Quality Data for West Twin Creek, AK, Allequash Creek, WI, and Big Thompson River, CO, 2010-2020

This dataset includes discrete water quality and discharge data for three streams that flow through wetlands. There are two measurement and sampling locations on each stream: one immediately upstream from the wetland and one immediately downstream from the wetland. Measurements and sample collection occurred in 2010 and 2011 at West Twin Creek, AK; in 2019 and 2020 at Allequash Creek, WI...
By
Water Resources Mission Area, Ecosystems Land Change Science Program

Water quality and gas fluxes of Interior Alaska (2014-2018) Water quality and gas fluxes of Interior Alaska (2014-2018)

This product consists of multiple tabular datasets and associated metadata of water quality information related to rivers, streams, and lakes in the Yukon River watershed between 2014 and 2018. This data release is apart of the National Aeronautics and Space Administration (NASA) funded Arctic-Boreal Vulnerability Experiment (ABoVE) and is an assessment of water quality and greenhouse...
By
Water Resources Mission Area
Image: Instrumentation Array, Beaver Creek Near Michael Lake, Alaska
Instrumentation Array, Beaver Creek Near Michael Lake, Alaska
Instrumentation Array, Beaver Creek Near Michael Lake, Alaska
Image: Instrumentation Array, Beaver Creek Near Michael Lake, Alaska

Instrumentation Array, Beaver Creek Near Michael Lake, Alaska

Instrumentation Array, Beaver Creek Near Michael Lake, Alaska

Instrumentation array with a YSI multiparameter sonde, a dissolved CO2 sensor, and a CDOM sensor.

By
Alaska Science Center, Communications and Publishing
Image: Instrumentation Array, Beaver Creek Near Michael Lake, Alaska

Instrumentation Array, Beaver Creek Near Michael Lake, Alaska

Instrumentation Array, Beaver Creek Near Michael Lake, Alaska

Instrumentation array with a YSI multiparameter sonde, a dissolved CO2 sensor, and a CDOM sensor.

By
Alaska Science Center, Communications and Publishing
Image: Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska
Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska
Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska
Image: Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska

Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska

Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska

Instrumentation array with a YSI multiparameter sonde, a dissolved CO2 sensor, and a CDOM sensor.

By
Alaska Science Center, Communications and Publishing
Image: Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska

Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska

Instrumentation Array, Beaver Creek Above Victoria Creek, Alaska

Instrumentation array with a YSI multiparameter sonde, a dissolved CO2 sensor, and a CDOM sensor.

By
Alaska Science Center, Communications and Publishing
Image: Ice Out on Yukon River, Pilot Station, Alaska
Ice Out on Yukon River, Pilot Station, Alaska
Ice Out on Yukon River, Pilot Station, Alaska
Image: Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Panoramic image of ice break up on the Yukon River at Pilot Station, Alaska.

By
Communications and Publishing
Image: Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Panoramic image of ice break up on the Yukon River at Pilot Station, Alaska.

By
Communications and Publishing
Image: Ice Out on Yukon River, Pilot Station, Alaska
Ice Out on Yukon River, Pilot Station, Alaska
Ice Out on Yukon River, Pilot Station, Alaska
Image: Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Spring breakup on May 21 on the Yukon River at Pilot Station, Alaska.

By
Communications and Publishing
Image: Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Ice Out on Yukon River, Pilot Station, Alaska

Spring breakup on May 21 on the Yukon River at Pilot Station, Alaska.

By
Communications and Publishing
Image: Aerial of Beaver Creek, Alaska
Aerial of Beaver Creek, Alaska
Aerial of Beaver Creek, Alaska
Image: Aerial of Beaver Creek, Alaska

Aerial of Beaver Creek, Alaska

Aerial of Beaver Creek, Alaska

Aquatic ecosystems make a difference in the carbon cycle. The location in this photo is located near Beaver, Alaska approximately 100 miles north of Fairbanks.

By
Ecosystems, Communications and Publishing
Image: Aerial of Beaver Creek, Alaska

Aerial of Beaver Creek, Alaska

Aerial of Beaver Creek, Alaska

Aquatic ecosystems make a difference in the carbon cycle. The location in this photo is located near Beaver, Alaska approximately 100 miles north of Fairbanks.

By
Ecosystems, Communications and Publishing
Image: Fireweed and Beaver Creek, Alaska
Fireweed and Beaver Creek, Alaska
Fireweed and Beaver Creek, Alaska
Image: Fireweed and Beaver Creek, Alaska

Fireweed and Beaver Creek, Alaska

Fireweed and Beaver Creek, Alaska

Fireweed gains a foothold in a burn area of the White Mountains in Alaska.

By
Natural Hazards, Communications and Publishing
Image: Fireweed and Beaver Creek, Alaska

Fireweed and Beaver Creek, Alaska

Fireweed and Beaver Creek, Alaska

Fireweed gains a foothold in a burn area of the White Mountains in Alaska.

By
Natural Hazards, Communications and Publishing
Image: Rainbow Over Yukon River, Eagle, Alaska, June 2002
Rainbow Over Yukon River, Eagle, Alaska, June 2002
Rainbow Over Yukon River, Eagle, Alaska, June 2002
Image: Rainbow Over Yukon River, Eagle, Alaska, June 2002

Rainbow Over Yukon River, Eagle, Alaska, June 2002

Rainbow Over Yukon River, Eagle, Alaska, June 2002

Eagle was our put-in point for our first synoptic cruise down the Yukon River.

By
Alaska Science Center, Communications and Publishing
Image: Rainbow Over Yukon River, Eagle, Alaska, June 2002

Rainbow Over Yukon River, Eagle, Alaska, June 2002

Rainbow Over Yukon River, Eagle, Alaska, June 2002

Eagle was our put-in point for our first synoptic cruise down the Yukon River.

By
Alaska Science Center, Communications and Publishing
Filter Total Items: 40

Linking dissolved organic matter composition to landscape properties in wetlands across the United States of America Linking dissolved organic matter composition to landscape properties in wetlands across the United States of America

Wetlands are integral to the global carbon cycle, serving as both a source and a sink for organic carbon. Their potential for carbon storage will likely change in the coming decades in response to higher temperatures and variable precipitation patterns. We characterized the dissolved organic carbon (DOC) and dissolved organic matter (DOM) composition from 12 different wetland sites...
Authors
Martin R. Kurek, Kimberly Wickland, Natalie A. Nichols, Amy M. McKenna, Steven M. Anderson, Mark M. Dornblaser, Nikaan Koupaie-Abyazani, Brett A. Poulin, Sheel Bansal, Jason B. Fellman, Gregory K. Druschel, Emily S. Bernhardt, Robert G.M. Spencer
By
Ecosystems Mission Area, Ecosystems Land Change Science Program, Geosciences and Environmental Change Science Center, Northern Prairie Wildlife Research Center

Knowledge gaps and opportunities in water-quality drivers of aquatic ecosystem health Knowledge gaps and opportunities in water-quality drivers of aquatic ecosystem health

This report identifies key scientific gaps that limit our ability to predict water quality effects on health of aquatic ecosystems and proposes approaches to address those gaps. Topics considered include (1) coupled nutrient-carbon cycle processes and related ecological-flow-regime drivers of ecosystem health, (2) anthropogenic and geogenic toxin bioexposure, (3) fine sediment drivers of...
By
Water Resources Mission Area

Arctic-boreal lakes of interior Alaska dominated by contemporary carbon Arctic-boreal lakes of interior Alaska dominated by contemporary carbon

Northern high-latitude lakes are critical sites for carbon processing and serve as potential conduits for the emission of permafrost-derived carbon and greenhouse gases. However, the fate and emission pathways of permafrost carbon in these systems remain uncertain. Here, we used the natural abundance of radiocarbon to identify and trace the predominant sources of methane, carbon dioxide...
Authors
Fenix Garcia-Tigreros, Clayton D. Elder, Martin R. Kurek, Benjamin L. Miller, Xiaomei Xu, Kimberly Wickland, Cluadia I. Czimczik, Mark M. Dornblaser, Robert G. Striegl, Ethan D. Kyzivat, Laurence C. Smith, Robert G.M. Spencer, Charles E. Miller, David Butman
By
Geosciences and Environmental Change Science Center

High voltage: The molecular properties of redox-active dissolved organic matter in northern high-latitude lakes High voltage: The molecular properties of redox-active dissolved organic matter in northern high-latitude lakes

Redox-active functional groups in dissolved organic matter (DOM) are crucial for microbial electron transfer and methane emissions. However, the extent of aquatic DOM redox properties across northern high-latitude lakes and their relationships with DOM composition have not been thoroughly described. We quantified electron donating capacity (EDC) and electron accepting capacity (EAC) in...
Authors
Martin R. Kurek, Fenix Garcia-Tigreros, Natalie A. Nichols, Gregory K. Druschel, Kimberly Wickland, Mark M. Dornblaser, Robert G. Striegl, Sydney F. Niles, Amy M. McKenna, Pieter J.K Aukes, Ethan D. Kyzivat, Chao Wang, Laurence C. Smith, Sherry L. Schiff, David Butman, Robert G.M. Spencer
By
Geosciences and Environmental Change Science Center

Dissolved carbon export by large river systems is influenced by source area heterogeneity Dissolved carbon export by large river systems is influenced by source area heterogeneity

Rivers and streams export inorganic and organic carbon derived from contributing landscapes and so downstream carbon fluxes are important quantitative indicators of change in ecosystem function and for the full accounting of terrestrial carbon budgets. Carbon concentration-discharge (C-Q) relationships in rivers provide important information about carbon source and behavior in watersheds...
Authors
Edward G. Stets, Robert G. Striegl, Kimberly Wickland, Mark Dornblaser, Sydney Foks
By
Water Resources Mission Area, Ecosystems Land Change Science Program

Anthropogenic landcover impacts fluvial dissolved organic matter composition in the Upper Mississippi River Basin Anthropogenic landcover impacts fluvial dissolved organic matter composition in the Upper Mississippi River Basin

Landcover changes have altered the natural carbon cycle; however, most landcover studies focus on either forest conversion to agriculture or urban, rarely both. We present differences in dissolved organic carbon (DOC) concentrations and dissolved organic matter (DOM) molecular composition within Upper Mississippi River Basin low order streams and rivers draining one of three dominant...
Authors
Derrick R. Vaughn, Anne M. Kellerman, Kimberly Wickland, Robert G. Striegl, David C. Podgorski, Jon R. Hawkings, Jaap Nienhuis, Mark Dornblaser, Edward G. Stets, Robert G. M. Spencer
By
Water Resources Mission Area, Ecosystems Land Change Science Program, Land Change Science Program

Hydrologic and landscape controls on dissolved organic matter composition across western North American Arctic lakes Hydrologic and landscape controls on dissolved organic matter composition across western North American Arctic lakes

Northern high-latitude lakes are hotspots for cycling dissolved organic carbon (DOC) inputs from allochthonous sources to the atmosphere. However, the spatial distribution of lake dissolved organic matter (DOM) is largely unknown across Arctic-boreal regions with respect to the surrounding landscape. We expand on regional studies of northern high-latitude DOM composition by integrating...
Authors
Martin R. Kurek, Fenix Garcia-Tigreros, Kimberly Wickland, Karen E. Frey, Mark Dornblaser, Robert G. Striegl, Sydney F. Niles, Amy M. McKenna, Pieter J.K Aukes, Ethan D. Kyzivat, Chao Wang, Tamlin M. Pavelsky, Laurence C. Smith, Sherry L. Schiff, David Butman, Robert G.M. Spencer
By
Water Resources Mission Area

Bioavailability of dissolved organic matter varies with anthropogenic landcover in the Upper Mississippi River Basin Bioavailability of dissolved organic matter varies with anthropogenic landcover in the Upper Mississippi River Basin

Anthropogenic conversion of forests and wetlands to agricultural and urban landcovers impacts dissolved organic matter (DOM) within streams draining these catchments. Research on how landcover conversion impacts DOM molecular level composition and bioavailability, however, is lacking. In the Upper Mississippi River Basin (UMRB), water from low-order streams and rivers draining one of...
Authors
Derrick R. Vaughn, Anne M. Kellerman, Kimberly Wickland, Robert G. Striegl, David C. Podgorski, Jon R. Hawkings, Jaap H. Nienhuis, Mark M. Dornblaser, Edward G. Stets, Robert G.M. Spencer
By
Water Resources Mission Area, Ecosystems Land Change Science Program

The importance of lake emergent aquatic vegetation for estimating Arctic-boreal methane emissions The importance of lake emergent aquatic vegetation for estimating Arctic-boreal methane emissions

Areas of lakes that support emergent aquatic vegetation emit disproportionately more methane than open water but are under-represented in upscaled estimates of lake greenhouse gas emissions. These shallow areas are typically less than ∼1.5 m deep and can be detected with synthetic aperture radar (SAR). To assess the importance of lake emergent vegetation (LEV) zones to landscape-scale...
Authors
Ethan D. Kyzivat, Laurence C. Smith, Fenix Garcia-Tigreros, Chang Huang, Chao Wang, Theodore Langhorst, Jessica V. Fayne, Merritt E. Harlan, Yuta Ishitsuka, Dongmei Feng, Wayana Dolan, Lincoln H. Pitcher, Kimberly Wickland, Mark Dornblaser, Robert G. Striegl, Tamlin M. Pavelsky, David E. Butman, Colin J. Gleason
By
Ecosystems Mission Area, Water Resources Mission Area, Cooperative Research Units, Geosciences and Environmental Change Science Center

Spatiotemporal dynamics of CO2 gas exchange from headwater mountain streams Spatiotemporal dynamics of CO2 gas exchange from headwater mountain streams

Mountain streams play an important role in the global carbon cycle by transporting, metabolizing, and exchanging carbon they receive from the terrestrial environment. The rates at which these processes occur remain highly uncertain because of a paucity of observations and the difficulty of measuring gas exchange rates in steep, turbulent mountain streams. This uncertainty is compounded...
Authors
David W. Clow, Robert G. Striegl, Mark Dornblaser
By
Water Resources Mission Area, Ecosystems Land Change Science Program, Land Change Science Program, Colorado Water Science Center

Storm-scale and seasonal dynamics of carbon export from a nested subarctic watershed underlain by permafrost Storm-scale and seasonal dynamics of carbon export from a nested subarctic watershed underlain by permafrost

Subarctic catchments underlain by permafrost sequester a major stock of frozen organic carbon (C), which may be mobilized as the Arctic warms. Warming can impact C export from thawing soils by altering the depth and timing of runoff related to changing storm and fire regimes and altered soil thaw depths. We investigated C export in a first order headwater stream (West Twin Creek) and its...
Authors
Joshua C. Koch, Mark Dornblaser, Rob Striegl
By
Ecosystems Mission Area, Alaska Science Center, Wildland Fire Science

USGS permafrost research determines the risks of permafrost thaw to biologic and hydrologic resources USGS permafrost research determines the risks of permafrost thaw to biologic and hydrologic resources

The U.S. Geological Survey (USGS), in collaboration with university, Federal, Tribal, and independent partners, conducts fundamental research on the distribution, vulnerability, and importance of permafrost in arctic and boreal ecosystems. Scientists, land managers, and policy makers use USGS data to help make decisions for development, wildlife habitat, and other needs. Native villages...
Authors
Mark P. Waldrop, Lesleigh Anderson, Mark Dornblaser, Li H. Erikson, Ann E. Gibbs, Nicole M. Herman-Mercer, Stephanie R. James, Miriam C. Jones, Joshua C. Koch, Mary-Cathrine Leewis, Kristen L. Manies, Burke J. Minsley, Neal J. Pastick, Vijay Patil, Frank Urban, Michelle A. Walvoord, Kimberly P. Wickland, Christian Zimmerman
By
Natural Hazards Mission Area, Water Resources Mission Area, Ecosystems Land Change Science Program, Coastal and Marine Hazards and Resources Program, Land Change Science Program, Volcano Hazards Program, Earth Resources Observation and Science (EROS) Center , Geology, Geophysics, and Geochemistry Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Geosciences and Environmental Change Science Center, Pacific Coastal and Marine Science Center, Volcano Science Center
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