Mikhail Kanevsiy (University of Alaska, Fairbanks) holding a core of ice-rich permafrost from about 2m depth.
Jennifer Harden, PhD (Former Employee)
Science and Products
Soil data release of Open-File Report 02-277, collected on marine terraces near Santa Cruz, California in 1981 Soil data release of Open-File Report 02-277, collected on marine terraces near Santa Cruz, California in 1981
This data release represents samples collected in 1981 along a series of five marine terraces between Ano Nuevo and Santa Cruz in California as a part of a U.S. Geological Survey project led by Dennis Marchand to study soil chronosequences in the Western United States. These sequential surfaces of soils have similar key elements for development in the slope, climate, vegetation, and...
Soil data release of legacy data collected from a soil chronosequence in Northern Michigan Soil data release of legacy data collected from a soil chronosequence in Northern Michigan
In July 1992 soils were sampled from six dune fields in the northern Lower Peninsula of Michigan near Wilderness State Park, about 10 miles southwest of Mackinaw City. The dune fields represent a soil chronosequence, where all soil forming factors except time are held constant (climate, organisms, relief, and parent material). These sandy lake terrace soils are Entisols and Spodosols...
Soil data release of U.S. Geological Survey Bulletin 1590, collected across the Western United States between 1975 and 1983 Soil data release of U.S. Geological Survey Bulletin 1590, collected across the Western United States between 1975 and 1983
Early studies of soil formation highlighted several key factors that together determine the degree of soil pedogenesis, which include climate, organisms (including vegetation), topography, and parent material (Jenny H.; 1941; Factors of Soil Formation, a System of Quantitative Pedology; https://doi.org/10.2134/agronj1941.00021962003300090016x). A soil chronosequence is defined as a...
Digital Database and Maps of Quaternary Deposits in East and Central Siberia Digital Database and Maps of Quaternary Deposits in East and Central Siberia
This digital database is the product of collaboration between the U.S. Geological Survey, the Alfred Wegener Institute for Polar and Marine Research Potsdam, Foothill College GeoSpatial Technology Certificate Program, and the Geophysical Institute at the University of Alaska. The primary goal for creating this digital database is to enhance current estimates of organic carbon stored in...
Filter Total Items: 143
The trajectory of soil development and its relationship to soil carbon dynamics The trajectory of soil development and its relationship to soil carbon dynamics
It has been postulated that the amount of soil organic carbon (SOC) associated with soil minerals exhibits a threshold relationship in response to effective soil moisture (estimated as precipitation less evapotranspiration). To better characterize the role of moisture in influencing mechanisms of SOC storage during pedogenesis, we compare soils from two different chronosequence sites...
Authors
Corey Lawrence, Marjorie S. Schulz, Caroline Masiello, Oliver Chadwick, Jennifer Harden
Generalized models to estimate carbon and nitrogen stocks of organic soil horizons in Interior Alaska Generalized models to estimate carbon and nitrogen stocks of organic soil horizons in Interior Alaska
Boreal ecosystems comprise one tenth of the world’s land surface and contain over 20 % of the global soil carbon (C) stocks. Boreal soils are unique in that its mineral soil is covered by what can be quite thick layers of organic soil. These organic soil layers, or horizons, can differ in their state of decomposition, source vegetation, and disturbance history. These differences result...
Authors
Kristen Manies, Mark Waldrop, Jennifer Harden
An open source database for the synthesis of soil radiocarbon data: ISRaD version 1.0 An open source database for the synthesis of soil radiocarbon data: ISRaD version 1.0
Radiocarbon is a critical constraint on our estimates of the timescales of soil carbon cycling that can aid in identifying mechanisms of carbon stabilization and destabilization and improve the forecast of soil carbon response to management or environmental change. Despite the wealth of soil radiocarbon data that have been reported over the past 75 years, the ability to apply these data...
Authors
Corey Lawrence, Jeffrey Beem-Miller, Alison Hoyt, Grey Monroe, Carlos Sierra, Shane Stoner, Katherine Heckman, Joseph Blankinship, Susan Crow, Gavin McNichol, Susan Trumbore, Paul Levine, Olga Vinduskova, Katherine Todd-Brown, Craig Rasmussen, Caitlin Hicks Pries, Christina Schadel, Karis McFarlane, Sebastian Doetterl, Christine Hatte, Yujie He, Claire Treat, Jennifer Harden, Margaret Torn, Cristian Estop-Aragonés, Asmeret Berhe, Marco Keiluweit, Agatha Kuhnen, Erika Marin-Spiotta, Alain Plante, Aaron Thompson, Zheng Shi, Joshua Schimel, Lydia J.S. Vaughn, Sophie von Fromm, Rota Wagai
The landscape of soil carbon data: Emerging questions, synergies and databases The landscape of soil carbon data: Emerging questions, synergies and databases
Soil carbon has been measured for over a century in applications ranging from understanding biogeochemical processes in natural ecosystems to quantifying the productivity and health of managed systems. Consolidating diverse soil carbon datasets is increasingly important to maximize their value, particularly with growing anthropogenic and climate change pressures. In this progress report...
Authors
Avni Malhotra, Katherine Todd-Brown, Luke Nave, Niels Batjes, James Holmquist, Alison Hoyt, Colleen Iversen, Robert Jackson, Kate Lathja, Corey Lawrence, Olga Vinduśková, William Wieder, Matt Williams, Gustaf Hugelias, Jennifer Harden
Beneath the arctic greening: Will soils lose or gain carbon or perhaps a little of both? Beneath the arctic greening: Will soils lose or gain carbon or perhaps a little of both?
Ecosystem shifts related to climate change are anticipated for the next decades to centuries based on a number of conceptual and experimentally derived models of plant structure and function. Belowground, the potential responses of soil systems are less well known. We used geochemical steady state models, soil density fractionation, and soil radiocarbon data to constrain changes in soil...
Authors
Jennifer Harden, J.A. O’Donnell, K.A. Heckman, B.N. Sulman, C.D. Koven, C.L. Ping, G.J. Michaelson
Networking our science to characterize the state, vulnerabilities, and management opportunities of soil organic matter Networking our science to characterize the state, vulnerabilities, and management opportunities of soil organic matter
Soil organic matter (SOM) supports the Earth's ability to sustain terrestrial ecosystems, provide food and fiber, and retains the largest pool of actively cycling carbon. Over 75% of the soil organic carbon (SOC) in the top meter of soil is directly affected by human land use. Large land areas have lost SOC as a result of land use practices, yet there are compensatory opportunities to...
Authors
Jennifer Harden, Gustaf Hugelius, Anders Ahlstrom, Joseph Blankinship, Ben Bond-Lamberty, Corey Lawrence, Julie Loisel, Avni Malhotra, Robert Jackson, Stephen Ogle, Claire Phillips, Rebecca Ryals, Katherine Todd-Brown, Rodrigo Vargas, Sintana Vergara, M. Cotrufo, Marco Keiluweit, Katherine Heckman, Susan Crow, Whendee L. Silver, Marcia DeLonge, Lucas Nave
A sequential selective dissolution method to quantify storage and stability of organic carbon associated with Al and Fe hydroxide phases A sequential selective dissolution method to quantify storage and stability of organic carbon associated with Al and Fe hydroxide phases
Stabilization of SOM (soil organic matter) is regulated in part by sorption and desorption reactions happening at mineral surfaces, as well as precipitation and dissolution of organo-metal complexes. Fe and Al hydroxides play a particularly significant role in SOM stabilization in soils due to their ubiquitous distribution and their highly reactive surface properties. Iron and Al...
Authors
Katherine Heckman, Corey R. Lawrence, Jennifer Harden
A decade of boreal rich fen greenhouse gas fluxes in response to natural and experimental water table variability A decade of boreal rich fen greenhouse gas fluxes in response to natural and experimental water table variability
Rich fens are common boreal ecosystems with distinct hydrology, biogeochemistry and ecology that influence their carbon (C) balance. We present growing season soil chamber methane emission (FCH4), ecosystem respiration (ER), net ecosystem exchange (NEE) and gross primary production (GPP) fluxes from a 9-years water table manipulation experiment in an Alaskan rich fen. The study included...
Authors
David Olefeldt, Eugénie S. Euskirchen, Jennifer Harden, Evan Kane, A. McGuire, Mark Waldrop, Merritt Turetsky
Rapid carbon loss and slow recovery following permafrost thaw in boreal peatlands Rapid carbon loss and slow recovery following permafrost thaw in boreal peatlands
Permafrost peatlands store one-third of the total carbon (C) in the atmosphere and are increasingly vulnerable to thaw as high-latitude temperatures warm. Large uncertainties remain about C dynamics following permafrost thaw in boreal peatlands. We used a chronosequence approach to measure C stocks in forested permafrost plateaus (forest) and thawed permafrost bogs, ranging in thaw age...
Authors
Miriam Jones, Jennifer Harden, Jonathan O’Donnell, Kristen Manies, Torre Jorgenson, Claire Treat, Stephanie Ewing
Radiocarbon constraints imply reduced carbon uptake by soils during the 21st century Radiocarbon constraints imply reduced carbon uptake by soils during the 21st century
Soil is the largest terrestrial carbon reservoir and may influence the sign and magnitude of carbon cycle-climate feedbacks. Many Earth system models (ESMs) estimate a significant soil carbon sink by 2100, yet the underlying carbon dynamics determining this response have not been systematically tested against observations. We used 14C data from 157 globally distributed soil profiles...
Authors
Yujie He, Susan E. Trumbore, Margaret Torn, Jennifer Harden, Lydia J.S. Vaughn, Steven Allison, J. Randerson
Decadal and long-term boreal soil carbon and nitrogen sequestration rates across a variety of ecosystems Decadal and long-term boreal soil carbon and nitrogen sequestration rates across a variety of ecosystems
Boreal soils play a critical role in the global carbon (C) cycle; therefore, it is important to understand the mechanisms that control soil C accumulation and loss for this region. Examining C & nitrogen (N) accumulation rates over decades to centuries may provide additional understanding of the dominant mechanisms for their storage, which can be masked by seasonal and interannual...
Authors
Kristen Manies, Jennifer Harden, Christopher Fuller, Merritt Turetsky
Soil data for a vegetation gradient located at Bonanza Creek Long Term Ecological Research Site, interior Alaska Soil data for a vegetation gradient located at Bonanza Creek Long Term Ecological Research Site, interior Alaska
Boreal soils play an important role in the global carbon cycle owing to the large amount of carbon stored within this northern region. To understand how carbon and nitrogen storage varied among different ecosystems, a vegetation gradient was established in the Bonanza Creek Long Term Ecological Research (LTER) site, located in interior Alaska. The ecosystems represented are a black...
Authors
Kristen Manies, Jennifer Harden, Christopher Fuller, Xiaomei Xu, John McGeehin
Science and Products
Soil data release of Open-File Report 02-277, collected on marine terraces near Santa Cruz, California in 1981 Soil data release of Open-File Report 02-277, collected on marine terraces near Santa Cruz, California in 1981
This data release represents samples collected in 1981 along a series of five marine terraces between Ano Nuevo and Santa Cruz in California as a part of a U.S. Geological Survey project led by Dennis Marchand to study soil chronosequences in the Western United States. These sequential surfaces of soils have similar key elements for development in the slope, climate, vegetation, and...
Soil data release of legacy data collected from a soil chronosequence in Northern Michigan Soil data release of legacy data collected from a soil chronosequence in Northern Michigan
In July 1992 soils were sampled from six dune fields in the northern Lower Peninsula of Michigan near Wilderness State Park, about 10 miles southwest of Mackinaw City. The dune fields represent a soil chronosequence, where all soil forming factors except time are held constant (climate, organisms, relief, and parent material). These sandy lake terrace soils are Entisols and Spodosols...
Soil data release of U.S. Geological Survey Bulletin 1590, collected across the Western United States between 1975 and 1983 Soil data release of U.S. Geological Survey Bulletin 1590, collected across the Western United States between 1975 and 1983
Early studies of soil formation highlighted several key factors that together determine the degree of soil pedogenesis, which include climate, organisms (including vegetation), topography, and parent material (Jenny H.; 1941; Factors of Soil Formation, a System of Quantitative Pedology; https://doi.org/10.2134/agronj1941.00021962003300090016x). A soil chronosequence is defined as a...
Digital Database and Maps of Quaternary Deposits in East and Central Siberia Digital Database and Maps of Quaternary Deposits in East and Central Siberia
This digital database is the product of collaboration between the U.S. Geological Survey, the Alfred Wegener Institute for Polar and Marine Research Potsdam, Foothill College GeoSpatial Technology Certificate Program, and the Geophysical Institute at the University of Alaska. The primary goal for creating this digital database is to enhance current estimates of organic carbon stored in...
Ice Core
Mikhail Kanevsiy (University of Alaska, Fairbanks) holding a core of ice-rich permafrost from about 2m depth.
Mikhail Kanevsiy (University of Alaska, Fairbanks) holding a core of ice-rich permafrost from about 2m depth.
Filter Total Items: 143
The trajectory of soil development and its relationship to soil carbon dynamics The trajectory of soil development and its relationship to soil carbon dynamics
It has been postulated that the amount of soil organic carbon (SOC) associated with soil minerals exhibits a threshold relationship in response to effective soil moisture (estimated as precipitation less evapotranspiration). To better characterize the role of moisture in influencing mechanisms of SOC storage during pedogenesis, we compare soils from two different chronosequence sites...
Authors
Corey Lawrence, Marjorie S. Schulz, Caroline Masiello, Oliver Chadwick, Jennifer Harden
Generalized models to estimate carbon and nitrogen stocks of organic soil horizons in Interior Alaska Generalized models to estimate carbon and nitrogen stocks of organic soil horizons in Interior Alaska
Boreal ecosystems comprise one tenth of the world’s land surface and contain over 20 % of the global soil carbon (C) stocks. Boreal soils are unique in that its mineral soil is covered by what can be quite thick layers of organic soil. These organic soil layers, or horizons, can differ in their state of decomposition, source vegetation, and disturbance history. These differences result...
Authors
Kristen Manies, Mark Waldrop, Jennifer Harden
An open source database for the synthesis of soil radiocarbon data: ISRaD version 1.0 An open source database for the synthesis of soil radiocarbon data: ISRaD version 1.0
Radiocarbon is a critical constraint on our estimates of the timescales of soil carbon cycling that can aid in identifying mechanisms of carbon stabilization and destabilization and improve the forecast of soil carbon response to management or environmental change. Despite the wealth of soil radiocarbon data that have been reported over the past 75 years, the ability to apply these data...
Authors
Corey Lawrence, Jeffrey Beem-Miller, Alison Hoyt, Grey Monroe, Carlos Sierra, Shane Stoner, Katherine Heckman, Joseph Blankinship, Susan Crow, Gavin McNichol, Susan Trumbore, Paul Levine, Olga Vinduskova, Katherine Todd-Brown, Craig Rasmussen, Caitlin Hicks Pries, Christina Schadel, Karis McFarlane, Sebastian Doetterl, Christine Hatte, Yujie He, Claire Treat, Jennifer Harden, Margaret Torn, Cristian Estop-Aragonés, Asmeret Berhe, Marco Keiluweit, Agatha Kuhnen, Erika Marin-Spiotta, Alain Plante, Aaron Thompson, Zheng Shi, Joshua Schimel, Lydia J.S. Vaughn, Sophie von Fromm, Rota Wagai
The landscape of soil carbon data: Emerging questions, synergies and databases The landscape of soil carbon data: Emerging questions, synergies and databases
Soil carbon has been measured for over a century in applications ranging from understanding biogeochemical processes in natural ecosystems to quantifying the productivity and health of managed systems. Consolidating diverse soil carbon datasets is increasingly important to maximize their value, particularly with growing anthropogenic and climate change pressures. In this progress report...
Authors
Avni Malhotra, Katherine Todd-Brown, Luke Nave, Niels Batjes, James Holmquist, Alison Hoyt, Colleen Iversen, Robert Jackson, Kate Lathja, Corey Lawrence, Olga Vinduśková, William Wieder, Matt Williams, Gustaf Hugelias, Jennifer Harden
Beneath the arctic greening: Will soils lose or gain carbon or perhaps a little of both? Beneath the arctic greening: Will soils lose or gain carbon or perhaps a little of both?
Ecosystem shifts related to climate change are anticipated for the next decades to centuries based on a number of conceptual and experimentally derived models of plant structure and function. Belowground, the potential responses of soil systems are less well known. We used geochemical steady state models, soil density fractionation, and soil radiocarbon data to constrain changes in soil...
Authors
Jennifer Harden, J.A. O’Donnell, K.A. Heckman, B.N. Sulman, C.D. Koven, C.L. Ping, G.J. Michaelson
Networking our science to characterize the state, vulnerabilities, and management opportunities of soil organic matter Networking our science to characterize the state, vulnerabilities, and management opportunities of soil organic matter
Soil organic matter (SOM) supports the Earth's ability to sustain terrestrial ecosystems, provide food and fiber, and retains the largest pool of actively cycling carbon. Over 75% of the soil organic carbon (SOC) in the top meter of soil is directly affected by human land use. Large land areas have lost SOC as a result of land use practices, yet there are compensatory opportunities to...
Authors
Jennifer Harden, Gustaf Hugelius, Anders Ahlstrom, Joseph Blankinship, Ben Bond-Lamberty, Corey Lawrence, Julie Loisel, Avni Malhotra, Robert Jackson, Stephen Ogle, Claire Phillips, Rebecca Ryals, Katherine Todd-Brown, Rodrigo Vargas, Sintana Vergara, M. Cotrufo, Marco Keiluweit, Katherine Heckman, Susan Crow, Whendee L. Silver, Marcia DeLonge, Lucas Nave
A sequential selective dissolution method to quantify storage and stability of organic carbon associated with Al and Fe hydroxide phases A sequential selective dissolution method to quantify storage and stability of organic carbon associated with Al and Fe hydroxide phases
Stabilization of SOM (soil organic matter) is regulated in part by sorption and desorption reactions happening at mineral surfaces, as well as precipitation and dissolution of organo-metal complexes. Fe and Al hydroxides play a particularly significant role in SOM stabilization in soils due to their ubiquitous distribution and their highly reactive surface properties. Iron and Al...
Authors
Katherine Heckman, Corey R. Lawrence, Jennifer Harden
A decade of boreal rich fen greenhouse gas fluxes in response to natural and experimental water table variability A decade of boreal rich fen greenhouse gas fluxes in response to natural and experimental water table variability
Rich fens are common boreal ecosystems with distinct hydrology, biogeochemistry and ecology that influence their carbon (C) balance. We present growing season soil chamber methane emission (FCH4), ecosystem respiration (ER), net ecosystem exchange (NEE) and gross primary production (GPP) fluxes from a 9-years water table manipulation experiment in an Alaskan rich fen. The study included...
Authors
David Olefeldt, Eugénie S. Euskirchen, Jennifer Harden, Evan Kane, A. McGuire, Mark Waldrop, Merritt Turetsky
Rapid carbon loss and slow recovery following permafrost thaw in boreal peatlands Rapid carbon loss and slow recovery following permafrost thaw in boreal peatlands
Permafrost peatlands store one-third of the total carbon (C) in the atmosphere and are increasingly vulnerable to thaw as high-latitude temperatures warm. Large uncertainties remain about C dynamics following permafrost thaw in boreal peatlands. We used a chronosequence approach to measure C stocks in forested permafrost plateaus (forest) and thawed permafrost bogs, ranging in thaw age...
Authors
Miriam Jones, Jennifer Harden, Jonathan O’Donnell, Kristen Manies, Torre Jorgenson, Claire Treat, Stephanie Ewing
Radiocarbon constraints imply reduced carbon uptake by soils during the 21st century Radiocarbon constraints imply reduced carbon uptake by soils during the 21st century
Soil is the largest terrestrial carbon reservoir and may influence the sign and magnitude of carbon cycle-climate feedbacks. Many Earth system models (ESMs) estimate a significant soil carbon sink by 2100, yet the underlying carbon dynamics determining this response have not been systematically tested against observations. We used 14C data from 157 globally distributed soil profiles...
Authors
Yujie He, Susan E. Trumbore, Margaret Torn, Jennifer Harden, Lydia J.S. Vaughn, Steven Allison, J. Randerson
Decadal and long-term boreal soil carbon and nitrogen sequestration rates across a variety of ecosystems Decadal and long-term boreal soil carbon and nitrogen sequestration rates across a variety of ecosystems
Boreal soils play a critical role in the global carbon (C) cycle; therefore, it is important to understand the mechanisms that control soil C accumulation and loss for this region. Examining C & nitrogen (N) accumulation rates over decades to centuries may provide additional understanding of the dominant mechanisms for their storage, which can be masked by seasonal and interannual...
Authors
Kristen Manies, Jennifer Harden, Christopher Fuller, Merritt Turetsky
Soil data for a vegetation gradient located at Bonanza Creek Long Term Ecological Research Site, interior Alaska Soil data for a vegetation gradient located at Bonanza Creek Long Term Ecological Research Site, interior Alaska
Boreal soils play an important role in the global carbon cycle owing to the large amount of carbon stored within this northern region. To understand how carbon and nitrogen storage varied among different ecosystems, a vegetation gradient was established in the Bonanza Creek Long Term Ecological Research (LTER) site, located in interior Alaska. The ecosystems represented are a black...
Authors
Kristen Manies, Jennifer Harden, Christopher Fuller, Xiaomei Xu, John McGeehin
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government