Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Surface water / groundwater interactions; hyporheic zone hydrology and biogeochemistry; carbon, nitrogen, and phosphorus cycling; flow above / through frozen ground; preferential flow and soil pipe formation and transport.
Orange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Orange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
The Sadlerochit Spring is one of a handful of small springs that provides liquid water to the North Slope of Alaska year round. Given that most other water sources in this region are frozen in the winter, springs provide critical habitat for fish and macroinvertebrates, and may play an outsized role in the regions hydrologic cycle.
The Sadlerochit Spring is one of a handful of small springs that provides liquid water to the North Slope of Alaska year round. Given that most other water sources in this region are frozen in the winter, springs provide critical habitat for fish and macroinvertebrates, and may play an outsized role in the regions hydrologic cycle.
Ice-rich permafrost exerts a strong control on hydrology in Arctic regions because it limits infiltration, leading to large runoff events.
Ice-rich permafrost exerts a strong control on hydrology in Arctic regions because it limits infiltration, leading to large runoff events.
A gravel bar on the north fork of the Agashashok River, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region that is rapidly warming.
A gravel bar on the north fork of the Agashashok River, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region that is rapidly warming.
A misty morning in the headwaters of the Akillik River, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region that is rapidly warming.
A misty morning in the headwaters of the Akillik River, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region that is rapidly warming.
A small stream meanders through ice-rich polygonal ground in the Cutler River Basin, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region that
A small stream meanders through ice-rich polygonal ground in the Cutler River Basin, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region that
Hiking up a stream from the Akilik River drainage to set minnow traps for fish sampling. This is a stream type at the Boreal-Arctic transition of the Brooks Range, Noatak National Park and Preserve, Kobuk Valley National Park.
Hiking up a stream from the Akilik River drainage to set minnow traps for fish sampling. This is a stream type at the Boreal-Arctic transition of the Brooks Range, Noatak National Park and Preserve, Kobuk Valley National Park.
A flooding stream meanders through a permafrost landscape in Kobuk Valley National Park, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region
A flooding stream meanders through a permafrost landscape in Kobuk Valley National Park, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region
The Agashashok River and Asik watershed
The Agashashok River and Asik watershed
Example of thawing landscapes and thermokarst at our field sites
Example of thawing landscapes and thermokarst at our field sites
Brian Ebel pours a dye tracer into a pit to observe how water moves through soils on a burned hillslope.
Brian Ebel pours a dye tracer into a pit to observe how water moves through soils on a burned hillslope.
The north fork of the Agashashok River
The north fork of the Agashashok River
The majestic Brooks Range in Gates of the Arctic National Park, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks.
The majestic Brooks Range in Gates of the Arctic National Park, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks.
A high alpine tributary of the Agashashok River.
A high alpine tributary of the Agashashok River.
Ryan collects water chemistry samples during a subsurface tracer experiment while Matt observes.
Ryan collects water chemistry samples during a subsurface tracer experiment while Matt observes.
Meanders on the Agashashok River
Meanders on the Agashashok River
A tributary at the arctic-boreal transition in the Agashashok River Watershed
A tributary at the arctic-boreal transition in the Agashashok River Watershed
Wetlands in the Goose Creek watershed.
Wetlands in the Goose Creek watershed.
Goose Creek Watershed
The open black spruce forest of the West Twin Creek catchment with Table Top Mountain in the background
The open black spruce forest of the West Twin Creek catchment with Table Top Mountain in the background
Historically, the coastal plain of Alaska has been characterized by cloudy or foggy conditions, with only limited summer rain. However, with increasing air temperatures, convective storms are becoming increasingly common.
Historically, the coastal plain of Alaska has been characterized by cloudy or foggy conditions, with only limited summer rain. However, with increasing air temperatures, convective storms are becoming increasingly common.
Orange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
Orange streams are increasingly common in the Brooks Range of northern Alaska. The orange stream color reflects oxidized iron, but also often indicates elevated heavy metal concentrations. Our ongoing study aims to document these occurrences and the timing of their onset.
The Sadlerochit Spring is one of a handful of small springs that provides liquid water to the North Slope of Alaska year round. Given that most other water sources in this region are frozen in the winter, springs provide critical habitat for fish and macroinvertebrates, and may play an outsized role in the regions hydrologic cycle.
The Sadlerochit Spring is one of a handful of small springs that provides liquid water to the North Slope of Alaska year round. Given that most other water sources in this region are frozen in the winter, springs provide critical habitat for fish and macroinvertebrates, and may play an outsized role in the regions hydrologic cycle.
Ice-rich permafrost exerts a strong control on hydrology in Arctic regions because it limits infiltration, leading to large runoff events.
Ice-rich permafrost exerts a strong control on hydrology in Arctic regions because it limits infiltration, leading to large runoff events.
A gravel bar on the north fork of the Agashashok River, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region that is rapidly warming.
A gravel bar on the north fork of the Agashashok River, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region that is rapidly warming.
A misty morning in the headwaters of the Akillik River, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region that is rapidly warming.
A misty morning in the headwaters of the Akillik River, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region that is rapidly warming.
A small stream meanders through ice-rich polygonal ground in the Cutler River Basin, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region that
A small stream meanders through ice-rich polygonal ground in the Cutler River Basin, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region that
Hiking up a stream from the Akilik River drainage to set minnow traps for fish sampling. This is a stream type at the Boreal-Arctic transition of the Brooks Range, Noatak National Park and Preserve, Kobuk Valley National Park.
Hiking up a stream from the Akilik River drainage to set minnow traps for fish sampling. This is a stream type at the Boreal-Arctic transition of the Brooks Range, Noatak National Park and Preserve, Kobuk Valley National Park.
A flooding stream meanders through a permafrost landscape in Kobuk Valley National Park, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region
A flooding stream meanders through a permafrost landscape in Kobuk Valley National Park, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region
The Agashashok River and Asik watershed
The Agashashok River and Asik watershed
Example of thawing landscapes and thermokarst at our field sites
Example of thawing landscapes and thermokarst at our field sites
Brian Ebel pours a dye tracer into a pit to observe how water moves through soils on a burned hillslope.
Brian Ebel pours a dye tracer into a pit to observe how water moves through soils on a burned hillslope.
The north fork of the Agashashok River
The north fork of the Agashashok River
The majestic Brooks Range in Gates of the Arctic National Park, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks.
The majestic Brooks Range in Gates of the Arctic National Park, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks.
A high alpine tributary of the Agashashok River.
A high alpine tributary of the Agashashok River.
Ryan collects water chemistry samples during a subsurface tracer experiment while Matt observes.
Ryan collects water chemistry samples during a subsurface tracer experiment while Matt observes.
Meanders on the Agashashok River
Meanders on the Agashashok River
A tributary at the arctic-boreal transition in the Agashashok River Watershed
A tributary at the arctic-boreal transition in the Agashashok River Watershed
Wetlands in the Goose Creek watershed.
Wetlands in the Goose Creek watershed.
Goose Creek Watershed
The open black spruce forest of the West Twin Creek catchment with Table Top Mountain in the background
The open black spruce forest of the West Twin Creek catchment with Table Top Mountain in the background
Historically, the coastal plain of Alaska has been characterized by cloudy or foggy conditions, with only limited summer rain. However, with increasing air temperatures, convective storms are becoming increasingly common.
Historically, the coastal plain of Alaska has been characterized by cloudy or foggy conditions, with only limited summer rain. However, with increasing air temperatures, convective storms are becoming increasingly common.
*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