HR: 0800h
AN: C31A-0301    [Abstracts]
TI: Local Scale Radiobrightness Modeling During the Intensive Observing Period-4 of the Cold Land Processes Experiment-1
AU: * Kim, E
EM: ed.kim@nasa.gov
AF: NASA/GSFC Lab. for Hydrospheric Processes, code 975, Greenbelt, MD 20771 United States
AU: Tedesco, M
EM: mtedesco@umbc.edu
AF: GEST/Lab. for Hydrospheric Processes, code 975, Greenbelt, MD 20771 United States
AU: de Roo, R
EM: deroo@eecs.umich.edu
AF: University of Michigan, Space Physics Research Lab., 2455 Hayward St., Ann Arbor, MI 48109 United States
AU: England, A W
EM: england@umich.edu
AF: University of Michigan, Space Physics Research Lab., 2455 Hayward St., Ann Arbor, MI 48109 United States
AU: Gu, H
EM: guh@umich.edu
AF: University of Michigan, Space Physics Research Lab., 2455 Hayward St., Ann Arbor, MI 48109 United States
AU: Pham, H
EM: hpham@umich.edu
AF: University of Michigan, Space Physics Research Lab., 2455 Hayward St., Ann Arbor, MI 48109 United States
AU: Boprie, D
EM: boprie@engin.umich.edu
AF: University of Michigan, Space Physics Research Lab., 2455 Hayward St., Ann Arbor, MI 48109 United States
AU: Graf, T
EM: tgraf@hydra.t.u-tokyo.ac.jp
AF: University of Tokyo, Dept. of Civil Engr., Univ. of Tokyo, Bunkyo-ku, Tokyo, 113-8656 Japan
AU: Koike, T
EM: tkoike@hydra.t.u-tokyo.ac.jp
AF: University of Tokyo, Dept. of Civil Engr., Univ. of Tokyo, Bunkyo-ku, Tokyo, 113-8656 Japan
AU: Armstrong, R
EM: rlax@kryos.colorado.edu
AF: National Snow and Ice Data Center, CIRES 449 UCB Univ. of Colorado, Boulder, CO 80309 United States
AU: Brodzik, M
EM: brodzik@nsidc.org
AF: National Snow and Ice Data Center, CIRES 449 UCB Univ. of Colorado, Boulder, CO 80309 United States
AU: Hardy, J
EM: Janet.P.Hardy@erdc.usace.army.mil
AF: CRREL, 72 Lyme Road, Hanover, NH 03755-1290 United States
AU: Cline, D
EM: cline@nohrsc.nws.gov
AF: NWS/NOHRSC, 1735 Lake Drive West, Chanhassen, MN 55317-8582 United States
AB: The NASA Cold Land Processes Field Experiment (CLPX-1) was designed to provide microwave remote sensing observations and ground truth for studies of snow and frozen ground remote sensing, particularly issues related to scaling. CLPX-1 was conducted in 2002 and 2003 in Colorado, USA. One of the goals of the experiment was to test the capabilities of microwave emission models at different scales. Initial forward model validation work has concentrated on the Local-Scale Observation Site (LSOS), a 0.8~ha study site consisting of open meadows separated by trees where the most detailed measurements were made of snow depth and temperature, density, and grain size profiles. Results obtained in the case of the 3rd Intensive Observing Period (IOP3) period (February, 2003, dry snow) suggest that a model based on Dense Medium Radiative Transfer (DMRT) theory is able to model the recorded brightness temperatures using snow parameters derived from field measurements. This paper focuses on the ability of forward DMRT modelling, combined with snowpack measurements, to reproduce the radiobrightness signatures observed by the University of Michigan's Truck-Mounted Radiometer System (TMRS) at 19 and 37~GHz during the 4th IOP (IOP4) in March, 2003. Unlike in IOP3, conditions during IOP4 include both wet and dry periods, providing a valuable test of DMRT model performance. In addition, a comparison will be made for the one day of coincident observations by the University of Tokyo's Ground-Based Microwave Radiometer-7 (GBMR-7) and the TMRS. The plot-scale study in this paper establishes a baseline of DMRT performance for later studies at successively larger scales. And these scaling studies will help guide the choice of future snow retrieval algorithms and the design of future Cold Lands observing systems.
DE: 6969 Remote sensing
DE: 1863 Snow and ice (1827)
DE: 1894 Instruments and techniques
SC: Cryosphere [C]
MN: 2004 AGU Fall Meeting