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Investigation of the Seasonal Freeze/Thaw Cycle of Soils in the GAPP RegionsThe objective of this project is to understand the current and future impacts and feedbacks of seasonally frozen ground on the regional and global climate system and the ecosystem as a whole. More specifically, we proposed to: investigate the dynamics of the seasonally freezing and thawing processes and their relations to current climatic conditions through in situ data analysis and numerical modeling; develop a comprehensive algorithm to detect surface soil freeze/thaw status for snow-free land surface using passive microwave remote sensing data and for snow-covered land surface using numerical modeling, and validate the algorithm and numerical model using available ground-based measurements; investigate seasonal and inter-annual variations of frozen soils in the GAPP regions using data generated from the new validated algorithm and their relations to the environmental factors such as air temperature, snow cover, surface morphology, soil type and soil moisture; generate a frozen soil data set which describes the timing, duration, thickness, and area extent of seasonally frozen ground for the period from 1978 to present. The proposed research will be accomplished through data analysis, remote sensing, and numerical modeling.
Document ID
20050042073
Acquisition Source
Legacy CDMS
Document Type
Other
Date Acquired
September 7, 2013
Publication Date
January 1, 2004
Subject Category
Meteorology And Climatology
Report/Patent Number
PB2005-102122
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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