Výsledky vyhledávání - "M. J. Engram"

Ice roads through lake-rich Arctic watersheds: Integrating climate uncertainty and freshwater habitat responses into adaptive management

Autor: Stacey Fritz, Guido Grosse, Anne Gädeke, Vladimir A. Alexeev, Christopher D. Arp, Kurt C. Heim, Benjamin M. Jones, M. J. Engram, Hannah R. Uher-Koch, Lei Cai, Debora A. Nigro, Ronald P. Daanen, Matthew S. Whitman, Benjamin V. Gaglioti, John R. Beaver, Anna K. Liljedahl, F. J. Adams

Publikováno v: Arctic, Antarctic, and Alpine Research, Vol 51, Iss 1, Pp 9-23 (2019)

Vast mosaics of lakes, wetlands, and rivers on the Arctic Coastal Plain give the impression of water surplus. Yet long winters lock freshwater resources in ice, limiting freshwater habitats and water supply for human uses. Increasingly the petroleum

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ace0ac6c03b6c2e9889566fe60e9ea5
https://doi.org/10.1080/15230430.2018.1560839

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Decadal-scale hotspot methane ebullition within lakes following abrupt permafrost thaw

Autor: Allen C. Bondurant, Burke J. Minsley, Anna K. Liljedahl, Ronald P. Daanen, Josefine Lenz, Guido Grosse, Franz J. Meyer, S. R. James, Neal J. Pastick, K. M. Walter Anthony, J. Munk, M. J. Engram, Charles E. Miller, Prajna R Lindgren, Jeffrey P. Chanton, Benjamin M. Jones, Peter Anthony, Laura Brosius, P. Hanke

Publikováno v: EPIC3Environmental Research Letters, IOP Science, 16, pp. 035010, ISSN: 1748-9326

Thermokarst lakes accelerate deep permafrost thaw and the mobilization of previously frozen soil organic carbon. This leads to microbial decomposition and large releases of carbon dioxide (CO2) and methane (CH4) that enhance climate warming. However,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ff87aa58e042071808e4333abb6a877
https://hdl.handle.net/10013/epic.31afd2ee-7c3a-4db9-9430-fedeee7e6723

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Permafrost thaw lake methane flux estimates using GPR

Autor: Andrew D. Parsekian, M. J. Engram, Katey M. Walter Anthony, Benjamin M. Jones, Noriaki Ohara, R. C. Rangel

Publikováno v: 18th International Conference on Ground Penetrating Radar, Golden, Colorado, 14–19 June 2020.

This research demonstrates a new measurement and scaling approach to constrain the estimates of methane (CH4) fluxes emitted from permafrost thaw (thermokarst) lakes. Permafrost is estimated to store about 20% of the total terrestrial carbon (C) stoc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fec7eec216183a50b3a009361e3de711
https://doi.org/10.1190/gpr2020-024.1

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Remote sensing northern lake methane ebullition

Autor: Guido Grosse, Katrin Kohnert, Franz J. Meyer, K. M. Walter Anthony, Torsten Sachs, M. J. Engram, Andrei Serafimovich

Publikováno v: EPIC3Nature Climate Change, ISSN: 1758-678X
Nature Climate Change

Northern lakes are considered a major source of atmospheric methane (CH4), a potent GHG1,2. However, large uncertainties in their emissions (7–26 Tg CH4 yr–1; ref. 2) arise from challenges in upscaling field data, including fluxes by ebullition (

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fdb59f098fe8ef4d89024c9896ec5c94
https://hdl.handle.net/10013/epic.40e97e2e-2d09-4709-abcf-953872d36bf2

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Transient Electromagnetic Surveys for the Determination of Talik Depth and Geometry Beneath Thermokarst Lakes

Autor: A. Creighton, Allen C. Bondurant, Josefine Lenz, Paul Overduin, M. J. Engram, Esther Babcock, Benjamin M. Jones, Andrew D. Parsekian, Michael Angelopoulos, Guido Grosse, Christopher D. Arp

Publikováno v: Journal of Geophysical Research: Solid Earth. 123:9310-9323

Thermokarst lakes are prevalent in Arctic coastal lowland regions and sublake permafrost degradation and talik development contributes to greenhouse gas emissions by tapping the large permafrost carbon pool. Whereas lateral thermokarst lake expansion

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38d9ac69e667ffb10b025cb323df3688
https://doi.org/10.1029/2018jb016121

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Analyzing floating and bedfast lake ice regimes across Arctic Alaska using 25 years of space-borne SAR imagery

Autor: Benjamin M. Jones, Christopher D. Arp, Franz J. Meyer, M. J. Engram, Olaniyi A. Ajadi

Publikováno v: Remote Sensing of Environment. 209:660-676

Late-winter lake ice regimes are controlled by water depth relative to maximum ice thickness (MIT). When MIT exceeds maximum water depth, lakes freeze to the bottom with bedfast ice (BI) and when MIT is less than maximum water depth lakes have floati

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6a9ed3f50a90c467a2b64eb157c7602e
https://doi.org/10.1016/j.rse.2018.02.022

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Characterization of L-band synthetic aperture radar (SAR) backscatter from floating and grounded thermokarst lake ice in Arctic Alaska

Autor: Guido Grosse, Katey M. Walter Anthony, Franz J. Meyer, M. J. Engram

Publikováno v: The Cryosphere, Vol 7, Iss 6, Pp 1741-1752 (2013)

Radar remote sensing is a well-established method to discriminate lakes retaining liquid-phase water beneath winter ice cover from those that do not. L-band (23.6 cm wavelength) airborne radar showed great promise in the 1970s, but spaceborne synthet

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4750c8d3efe7acf3a05e033baacd7721
https://www.the-cryosphere.net/7/1741/2013/

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