Zobrazeno 1 - 10
of 99
pro vyhledávání: '"Denis Lacelle"'
Publikováno v:
Communications Earth & Environment, Vol 5, Iss 1, Pp 1-10 (2024)
Abstract Synthetic aperture radar is an invaluable tool for monitoring lake ice. This study utilizes synthetic aperture radar to analyze the 2019-2023 backscatter time series of perennially ice-covered Lake Untersee in East Antarctica. We observed st
Externí odkaz:
https://doaj.org/article/9a7163cc0daa41e7a3e1709f697188d7
Publikováno v:
Arctic Science, Vol 9, Iss 4, Pp 838-855 (2023)
Northern ecosystems are vulnerable to surface disturbances caused by warming climate and human activities. The Ogilvie Mountains in central Yukon are an important region that should be monitored, as it is a major transportation corridor connecting no
Externí odkaz:
https://doaj.org/article/d06abc88b4d74a7caaef76ed01d6d768
Publikováno v:
Communications Earth & Environment, Vol 3, Iss 1, Pp 1-12 (2022)
Frost susceptibility of permafrost sediments is strongly influenced by unfrozen water content, which is dependent on sediment type, soil water chemistry, and temperature, according to field observations and ensemble modeling prediction of ground ice
Externí odkaz:
https://doaj.org/article/b4a64a89aa6c48cb84cb80496f0d44fc
Autor:
Benoit Faucher, Denis Lacelle, Nicole Britney Marsh, Liam Jasperse, Ian Douglas Clark, Dale Thomas Andersen
Publikováno v:
Communications Earth & Environment, Vol 2, Iss 1, Pp 1-12 (2021)
Large periodic glacial outburst flood events replenish inorganic carbon concentrations and fuel the primary productivity of benthic microbial communities in the perennially ice-covered Lake Untersee.
Externí odkaz:
https://doaj.org/article/646898df4a424d07b816a511b460f8cb
Autor:
Luke Copland, Denis Lacelle, David Fisher, Frances Delaney, Laura Thomson, Brittany Main, David Burgess
Publikováno v:
Arctic Science, Vol 7, Iss 1, Pp 136-157 (2021)
We examine how recent increases in air temperature and precipitation, together with reductions in sea ice extent, may have affected the regional δD–δ18O composition of precipitation. In spring 2014, 80 snow samples were collected from six glacier
Externí odkaz:
https://doaj.org/article/cfc9e57ac8f84bc2ae4e3475aa89f96b
Publikováno v:
Arctic, Antarctic, and Alpine Research, Vol 53, Iss 1, Pp 324-339 (2021)
Climate change is impacting lakes and ponds in Antarctica. To that end, we investigated the distribution and chemical composition of ice-covered ponds in Untersee Oasis, East Antarctica. Thirty-nine ponds were inventoried, and the thirteen sampled po
Externí odkaz:
https://doaj.org/article/a64ca06215a4426eac0c49e4bdb7d8f2
Publikováno v:
Scientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)
Abstract Icings are sheet-like masses of ice that form on the ground surface or in fluvial channels from groundwater seepage. Although the presence of icings in the landscape is known, few studies investigated their regional distribution and explored
Externí odkaz:
https://doaj.org/article/5110c89e93994117b8f4bf87e02d23a6
Publikováno v:
Arctic Science, Vol 5, Iss 3, Pp 127-147 (2019)
Hummocks develop by cryoturbation in fine-grained frost-susceptible soils and their stage of maturity may affect the translocation of organics in Cryosols. This study examines the distribution and morphology of hummocks in the Chuck Creek Trail Valle
Externí odkaz:
https://doaj.org/article/0ebe2aa29517480b9480e3de7e4eda5b
Publikováno v:
Arctic Science, Vol 4, Iss 4, Pp 827-845 (2018)
Thaw slumps are one of the most dynamic features in permafrost terrain. Improved temporal and spatial resolution monitoring of slump activity is required to better characterize their dynamics over the thaw season. We assess how a ground-based station
Externí odkaz:
https://doaj.org/article/9413ebf3b1c548ad916ab7dd0f8b8638
Publikováno v:
Frontiers in Earth Science, Vol 8 (2020)
Perennially ice-covered lakes that are tightly sealed from the atmosphere represent a unique group of polar lakes. In these lakes, the δD-δ18O evolution of the water column and steady-state conditions are controlled by rates of recharge and freezin
Externí odkaz:
https://doaj.org/article/f2fb451c90a24b19a90fc4eff2f6aeda