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Objective Characterization of Snow Microstructure for Microwave Emission Modeling
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Author and Affiliation:
Durand, Michael(Ohio State Univ., School of Earth Science, Columbus, OH, United States);
Kim, Edward J.(NASA Goddard Space Flight Center, Greenbelt, MD, United States);
Molotch, Noah P.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States);
Margulis, Steven A.(California Univ., Dept. of Civil and Environmental Engineering, Los Angeles, CA, United States);
Courville, Zoe(Corps of Engineers, Cold Regions Research Engineering Lab., Hanover, NH, United States);
Malzler, Christian(Bern Univ., Inst. of Applied Physics, Bern, Switzerland)
Abstract: Passive microwave (PM) measurements are sensitive to the presence and quantity of snow, a fact that has long been used to monitor snowcover from space. In order to estimate total snow water equivalent (SWE) within PM footprints (on the order of approx 100 sq km), it is prerequisite to understand snow microwave emission at the point scale and how microwave radiation integrates spatially; the former is the topic of this paper. Snow microstructure is one of the fundamental controls on the propagation of microwave radiation through snow. Our goal in this study is to evaluate the prospects for driving the Microwave Emission Model of Layered Snowpacks with objective measurements of snow specific surface area to reproduce measured brightness temperatures when forced with objective measurements of snow specific surface area (S). This eliminates the need to treat the grain size as a free-fit parameter.
Publication Date: Jul 23, 2012
Document ID:
20120015412
(Acquired Nov 03, 2012)
Subject Category: METEOROLOGY AND CLIMATOLOGY
Report/Patent Number: GSFC.CPR.7022.2012
Document Type: Conference Paper
Meeting Information: IEEE 2012 Geoscience and Remote Sensing Symposium; 23-27 Jul. 2012; Munich; Germany
Meeting Sponsor: Institute of Electrical and Electronics Engineers; United States
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 3p; In English; Original contains color illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: MICROSTRUCTURE; MICROWAVE EMISSION; MICROWAVES; SNOW; SNOW COVER; PRECIPITATION MEASUREMENT; MODELS; BRIGHTNESS TEMPERATURE; MOISTURE CONTENT
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