Temperature anomaly reemergence in seasonally frozen soils
نویسندگان
چکیده
منابع مشابه
Modelling of cryogenic processes in permafrost and seasonally frozen soils
This paper investigates the thermo-hydro-mechanical (THM) behaviour of soils subjected to seasonal temperature variations in both permafrost and seasonally frozen conditions. Numerical modelling of soil freezing and ice segregation processes is presented, and compared against small-scale physical modelling experiments. The coupled THM model presented, which is solved by way of a transient finit...
متن کاملDetermining Water Retention in Seasonally Frozen Soils Using Hydra Impedance Sensors
SSSAJ: Volume 76: Number 1 • January–February 2012 Soil Sci. Soc. Am. J. 76:36–50 Posted online 11 Nov. 2011 doi:10.2136/sssaj 2011.0222 Received 15 June 2011 *Corresponding author ([email protected]). © Soil Science Society of America, 5585 Guilford Rd., Madison WI 53711 USA All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic...
متن کاملCryogenic Displacement and Accumulation of Biogenic Methane in Frozen Soils
Evidences of highly localized methane fluxes are reported from the Arctic shelf, hot spots of methane emissions in thermokarst lakes, and are believed to evolve to features like Yamal crater on land. The origin of large methane outbursts is problematic. Here we show, that the biogenic methane (δ13C ≤ −71h) which formed before and during soil freezing is presently held in the permafrost. Field a...
متن کاملThe subzero microbiome: microbial activity in frozen and thawing soils.
Most of the Earth's biosphere is characterized by low temperatures (<5°C) and cold-adapted microorganisms are widespread. These psychrophiles have evolved a complex range of adaptations of all cellular constituents to counteract the potentially deleterious effects of low kinetic energy environments and the freezing of water. Microbial life continues into the subzero temperature range, and this ...
متن کاملThe Importance of Seasonally Frozen Ground (SFG) in Mountain Environments To Hydrological, Ecological, and Geomorphic Systems
OVERVIEW There has been little research on the importance of Seasonally Frozen Ground (SFG), including permafrost, to many of the major processes in mountain environments. One reason has been the difficulty in measuring and estimating the areal extent of surface frost that occurs under seasonal snowpacks. Here we present preliminary evidence from the Colorado Front Range suggesting that SFG has...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 2007
ISSN: 0148-0227
DOI: 10.1029/2007jd008630