Results 101 to 110 of about 24,566 (233)

Nitrogen retention in the riparian zone of watersheds underlain by discontinuous permafrost [PDF]

, 2005
Thesis (M.S.) University of Alaska Fairbanks, 2005Riparian zones function as important ecotones for reducing nitrate concentration in groundwater and inputs into streams.
O'Donnell, Jonathan A.
core  

Observation and Coordination Needs for Current, Near‐Future, and Next Generation Earth‐Observing SAR Systems

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract This paper summarizes an evaluation by experts of how coordination of Earth‐observing Synthetic Aperture Radar (SAR) missions among the world's space agencies could advance toward game‐changing scientific discoveries and fully realizing SAR's practical capability to address many issues facing society.
Cathleen E. Jones, Ake Rosenqvist, Björn Rommen, Magdalena Fitrzyk, Eric Rignot, Bernd Scheuchl, Yujie Zheng, Andrew Hooper, Mark Simons, Tomokazu Kobayashi, Paul Siqueira, Maurizio Santoro, Takeo Tadono, Laura Hess, Heather McNairn, Laura Frulla, Malin Johansson, Wolfgang Dierking, Line Rouyet, Annett Bartsch, Paco Lopez Dekker, Johnny A. Johannessen   +21 more
wiley   +1 more source

Ecosystem‐Scale Methane Emissions From Peatlands of the Hudson Bay Lowlands

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 5, May 2026.
Abstract Northern peatlands are important sources of methane (CH4) in the atmosphere. However, the magnitude of CH4 emissions and their response to environmental factors are poorly constrained within the Hudson Bay Lowlands (HBL), the largest contiguous peatland complex in North America. This study investigated seasonal (April–November) eddy covariance‐
A. Bieniada, E. R. Humphreys
wiley   +1 more source

Multiyear measurements of ebullitive methane flux from three subarctic lakes [PDF]

, 2013
Ebullition (bubbling) from small lakes and ponds at high latitudes is an important yet unconstrained source of atmospheric methane (CH4). Small water bodies are most abundant in permanently frozen peatlands, and it is speculated that their emissions will
Bastviken, David, Varner, Ruth K., Wik, Martin   +2 more
core   +1 more source

Effects of warming on plant uptake of post‐fire nitrogen in an arctic heath tundra

New Phytologist, Volume 250, Issue 3, Page 1510-1521, May 2026.
Summary Postfire nitrogen (N) becomes increasingly important with the rising frequency of fires in arctic tundra, and climate warming is expected to accelerate plant recovery following fire. However, how plants differ in utilizing this postfire N and how their postfire N uptake responds to warming remains unknown.
Wenyi Xu, Per Lennart Ambus
wiley   +1 more source

Remote sensing evaluation of High Arctic wetland depletion following permafrost disturbance by thermo-erosion gullying processes

Arctic Science, 2017
Northern wetlands and their productive tundra vegetation are of prime importance for Arctic wildlife by providing high-quality forage and breeding habitats. However, many wetlands are becoming drier as a function of climate-induced permafrost degradation.
Naïm Perreault, Esther Lévesque, Daniel Fortier, Denis Gratton, Laurent J. Lamarque   +4 more
doaj   +1 more source

Scaling and balancing carbon dioxide fluxes in a heterogeneous tundra ecosystem of the Lena River Delta

, 2019
The current assessments of the carbon turnover in the Arctic tundra are subject to large uncertainties. This problem can (inter alia) be ascribed to both the general shortage of flux data from the vast and sparsely inhabited Arctic region, as well as the
Göckede, M., Holl, D., Kutzbach, L., Rößger, N., Wille, C.   +4 more
core   +1 more source

Understanding the relative importance of vertical and horizontal flow in ice-wedge polygons [PDF]

, 2020
Ice-wedge polygons are common Arctic landforms. The future of these landforms in a warming climate depends on the bidirectional feedback between the rate of ice-wedge degradation and changes in hydrological characteristics.
Dafflon, B, Gomez-Velez, JD, Kneafsey, TJ, Newman, BD, Soom, F, Wales, NA, Wilson, CJ, Wullschleger, SD   +7 more
core  

Energy input is primary controller of methane bubbling in subarctic lakes [PDF]

, 2014
Emission of methane (CH4) from surface waters is often dominated by ebullition (bubbling), a transport mode with high‐spatiotemporal variability. Based on new and extensive CH4 ebullition data, we demonstrate striking correlations (r2 between 0.92 and 0 ...
Anthony, Bastviken, Bastviken, Boylen, Brett F. Thornton, Callaghan, Christensen, Cole, David Bastviken, Downing, Downing, Duc, Golubyatnikov, Houser, Jackowicz-Korczynski, Karlsson, Karlsson, Kohler, Laudon, Malmer, Martin Wik, Olefeldt, Patrick M. Crill, Prowse, Repo, Rouse, Ruth K. Varner, Sally MacIntyre, Serreze, Smith, Walter, Walter, Wik, Wik, Yamamoto, Zeikus   +35 more
core   +3 more sources

Satellite‐Based Detection of Methane Emissions From Permafrost Peatland Warming

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Column‐averaged methane (XCH4) observations spanning 2018–2023 by the Tropospheric Monitoring Instrument (TROPOMI) on the Sentinel‐5 Precursor satellite are assessed for evidence of methane (CH4) emissions from permafrost regions. Bi‐monthly TROPOMI XCH4 anomaly maps and soil temperature (Tsoil) anomaly maps from reanalysis data are generated ...
Ray Nassar, Qindii Shafi, Joseph Mendonca, Sabour Baray, Peter Morse, Oliver Schneising, Michael Buchwitz, Ama Gamage   +7 more
wiley   +1 more source