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Introduction Improving vehicle trafficability planning is a major defense mission, and we believe that this research has made significant improvements towards this end. We are striving to develop new space-borne Synthetic Aperture Radar (SAR) techniques to measure temporal changes in soil moisture, soil freeze/thaw state, and snowmelt, utilizing both amplitude and phase signal information. Such knowledge is of great use to a variety of end-users. Military planners need to predict the bearing strength of the underlying soil and thus the number and weight of vehicles able to travel across it. Global climate modelers need to know the surface greenhouse gas and latent heat flux. The common variables in these applications...
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Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Modeling,
Monitoring 3-Improve Permafrost Mapping,
R1-Vulnerability Forest Species and Communities to Climate Change,
R2b-Effects of Fire on Ecosystems,
and Monitoring
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TABLE OF CONTENTS Acknowledgements ..................................................................................4 Executive Summary with Key Findings and Recommendations ............5 Current State of the Art .............................................................................5 Key Scientific Challenges and Recommendations ..................................5 Major New Synthesis Initiative Required ...................................................6 Implementation of Arctic-CHAMP .............................................................6 Policy Implications ....................................................................................7 Summary ..................................................................................................8...
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This research presents a method for permafrost mapping in discontinuous permafrost regions based on equivalent latitude/elevation concept in interior Alaska. In winter months, study site has a strong temperature inversion in air up to 700 m elevation. Air temperature data and the effects of slope, aspect and elevation were used to create an equivalent latitude/elevation model. This model was well correlated with mean annual surface temperature (0.79). In this watershed, the thawing index (I sub(t) approximately 1 400 degree C times days) at the ground surface and snow depth do not vary greatly from south facing to north facing slopes. The primary controlled factor that determines the mean annual surface temperature...
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