Jennifer Harden, PhD (Former Employee)
Science and Products
Filter Total Items: 144
Soils, vegetation, and woody debris data from the 2001 Survey Line fire and a comparable unburned site, Tanana Flats region, Alaska Soils, vegetation, and woody debris data from the 2001 Survey Line fire and a comparable unburned site, Tanana Flats region, Alaska
This report describes the collection and processing methodologies for samples obtained at two sites within Interior Alaska: (1) a location within the 2001 Survey Line burn, and (2) an unburned location, selected as a control. In 2002 and 2004 U.S. Geological Survey investigators measured soil properties including, but not limited to, bulk density, volumetric water content, carbon content...
Authors
Kristen L. Manies, Jennifer W. Harden, Teresa N. Holingsworth
Controls on methane released through ebullition in peatlands affected by permafrost degradation Controls on methane released through ebullition in peatlands affected by permafrost degradation
Permafrost thaw in peat plateaus leads to the flooding of surface soils and the formation of collapse scar bogs, which have the potential to be large emitters of methane (CH4) from surface peat as well as deeper, previously frozen, permafrost carbon (C). We used a network of bubble traps, permanently installed 20 cm and 60 cm beneath the moss surface, to examine controls on ebullition...
Authors
Sara J. Klapstein, Merritt R. Turetsky, A. David McGuire, Jennifer W. Harden, C.I. Czimczik, Xiaomei Xu, J. P. Chanton, James Michael Waddington
Controls on ecosystem and root respiration across a permafrost and wetland gradient in interior Alaska Controls on ecosystem and root respiration across a permafrost and wetland gradient in interior Alaska
Permafrost is common to many northern wetlands given the insulation of thick organic soil layers, although soil saturation in wetlands can lead to warmer soils and increased thaw depth. We analyzed five years of soil CO2 fluxes along a wetland gradient that varied in permafrost and soil moisture conditions. We predicted that communities with permafrost would have reduced ecosystem...
Authors
Nicole A. McConnell, Merritt R. Turetsky, A. David McGuire, Evan S. Kane, Mark P. Waldrop, Jennifer W. Harden
Distribution of late Pleistocene ice-rich syngenetic permafrost of the Yedoma Suite in east and central Siberia, Russia Distribution of late Pleistocene ice-rich syngenetic permafrost of the Yedoma Suite in east and central Siberia, Russia
This digital database is the product of collaboration between the U.S. Geological Survey, the Geophysical Institute at the University of Alaska, Fairbanks; the Los Altos Hills Foothill College GeoSpatial Technology Certificate Program; the Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany; and the Institute of Physical Chemical and Biological Problems in Soil...
Authors
Guido Grosse, Joel E. Robinson, Robin Bryant, Maxwell D. Taylor, William Harper, Amy DeMasi, Emily Kyker-Snowman, Alexandra Veremeeva, Lutz Schirrmeister, Jennifer Harden
Reorganization of vegetation, hydrology and soil carbon after permafrost degradation across heterogeneous boreal landscapes Reorganization of vegetation, hydrology and soil carbon after permafrost degradation across heterogeneous boreal landscapes
The diversity of ecosystems across boreal landscapes, successional changes after disturbance and complicated permafrost histories, present enormous challenges for assessing how vegetation, water and soil carbon may respond to climate change in boreal regions. To address this complexity, we used a chronosequence approach to assess changes in vegetation composition, water storage and soil...
Authors
M.T. Jorgenson, Jennifer W. Harden, M. Kanevskiy, J.A. O'Donnell, Kimberly Wickland, S. Ewing, Kristen L. Manies, Q. Zhuang, Y. Shur, Robert G. Striegl, Joshua C. Koch
Characterisation of the Permafrost Carbon Pool Characterisation of the Permafrost Carbon Pool
The current estimate of the soil organic carbon (SOC) pool in the northern permafrost region of 1672 Petagrams (Pg) C is much larger than previously reported and needs to be incorporated in global soil carbon (C) inventories. The Northern Circumpolar Soil Carbon Database (NCSCD), extended to include the range 0–300 cm, is now available online for wider use by the scientific community. An...
Authors
P. Kuhry, G. Grosse, J.W. Harden, G. Hugelius, C.D. Koven, C.-L. Ping, L. Schirrmeister, C. Tarnocai
Science and Products
Filter Total Items: 144
Soils, vegetation, and woody debris data from the 2001 Survey Line fire and a comparable unburned site, Tanana Flats region, Alaska Soils, vegetation, and woody debris data from the 2001 Survey Line fire and a comparable unburned site, Tanana Flats region, Alaska
This report describes the collection and processing methodologies for samples obtained at two sites within Interior Alaska: (1) a location within the 2001 Survey Line burn, and (2) an unburned location, selected as a control. In 2002 and 2004 U.S. Geological Survey investigators measured soil properties including, but not limited to, bulk density, volumetric water content, carbon content...
Authors
Kristen L. Manies, Jennifer W. Harden, Teresa N. Holingsworth
Controls on methane released through ebullition in peatlands affected by permafrost degradation Controls on methane released through ebullition in peatlands affected by permafrost degradation
Permafrost thaw in peat plateaus leads to the flooding of surface soils and the formation of collapse scar bogs, which have the potential to be large emitters of methane (CH4) from surface peat as well as deeper, previously frozen, permafrost carbon (C). We used a network of bubble traps, permanently installed 20 cm and 60 cm beneath the moss surface, to examine controls on ebullition...
Authors
Sara J. Klapstein, Merritt R. Turetsky, A. David McGuire, Jennifer W. Harden, C.I. Czimczik, Xiaomei Xu, J. P. Chanton, James Michael Waddington
Controls on ecosystem and root respiration across a permafrost and wetland gradient in interior Alaska Controls on ecosystem and root respiration across a permafrost and wetland gradient in interior Alaska
Permafrost is common to many northern wetlands given the insulation of thick organic soil layers, although soil saturation in wetlands can lead to warmer soils and increased thaw depth. We analyzed five years of soil CO2 fluxes along a wetland gradient that varied in permafrost and soil moisture conditions. We predicted that communities with permafrost would have reduced ecosystem...
Authors
Nicole A. McConnell, Merritt R. Turetsky, A. David McGuire, Evan S. Kane, Mark P. Waldrop, Jennifer W. Harden
Distribution of late Pleistocene ice-rich syngenetic permafrost of the Yedoma Suite in east and central Siberia, Russia Distribution of late Pleistocene ice-rich syngenetic permafrost of the Yedoma Suite in east and central Siberia, Russia
This digital database is the product of collaboration between the U.S. Geological Survey, the Geophysical Institute at the University of Alaska, Fairbanks; the Los Altos Hills Foothill College GeoSpatial Technology Certificate Program; the Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany; and the Institute of Physical Chemical and Biological Problems in Soil...
Authors
Guido Grosse, Joel E. Robinson, Robin Bryant, Maxwell D. Taylor, William Harper, Amy DeMasi, Emily Kyker-Snowman, Alexandra Veremeeva, Lutz Schirrmeister, Jennifer Harden
Reorganization of vegetation, hydrology and soil carbon after permafrost degradation across heterogeneous boreal landscapes Reorganization of vegetation, hydrology and soil carbon after permafrost degradation across heterogeneous boreal landscapes
The diversity of ecosystems across boreal landscapes, successional changes after disturbance and complicated permafrost histories, present enormous challenges for assessing how vegetation, water and soil carbon may respond to climate change in boreal regions. To address this complexity, we used a chronosequence approach to assess changes in vegetation composition, water storage and soil...
Authors
M.T. Jorgenson, Jennifer W. Harden, M. Kanevskiy, J.A. O'Donnell, Kimberly Wickland, S. Ewing, Kristen L. Manies, Q. Zhuang, Y. Shur, Robert G. Striegl, Joshua C. Koch
Characterisation of the Permafrost Carbon Pool Characterisation of the Permafrost Carbon Pool
The current estimate of the soil organic carbon (SOC) pool in the northern permafrost region of 1672 Petagrams (Pg) C is much larger than previously reported and needs to be incorporated in global soil carbon (C) inventories. The Northern Circumpolar Soil Carbon Database (NCSCD), extended to include the range 0–300 cm, is now available online for wider use by the scientific community. An...
Authors
P. Kuhry, G. Grosse, J.W. Harden, G. Hugelius, C.D. Koven, C.-L. Ping, L. Schirrmeister, C. Tarnocai
*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