NASA Cold Land Processes Experiment (CLPX 2002/03): Local Scale Observation Site

Janet Hardy Cold Regions Research and Engineering Laboratory, Engineer Research and Development Center, U.S. Army Corps of Engineers, Hanover, New Hampshire

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Robert Davis Cold Regions Research and Engineering Laboratory, Engineer Research and Development Center, U.S. Army Corps of Engineers, Hanover, New Hampshire

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Yeohoon Koh Cold Regions Research and Engineering Laboratory, Engineer Research and Development Center, U.S. Army Corps of Engineers, Hanover, New Hampshire

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Don Cline NOAA/NWS/National Operational Hydrologic Remote Sensing Center, Chanhassen, Minnesota

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Kelly Elder USDA Forest Service, Fort Collins, Colorado

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Richard Armstrong University of Colorado, Boulder, Colorado

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Hans-Peter Marshall University of Colorado, Boulder, Colorado

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Thomas Painter University of Utah, Salt Lake City, Utah

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Gilles Castres Saint-Martin University of Michigan, Ann Arbor, Michigan

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Roger DeRoo University of Michigan, Ann Arbor, Michigan

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Kamal Sarabandi University of Michigan, Ann Arbor, Michigan

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Tobias Graf University of Tokyo, Tokyo, Japan

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Toshio Koike University of Tokyo, Tokyo, Japan

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Kyle McDonald NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California

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Abstract

The local scale observation site (LSOS) is the smallest study site (0.8 ha) of the 2002/03 Cold Land Processes Experiment (CLPX) and is located within the Fraser mesocell study area. It was the most intensively measured site of the CLPX, and measurements here had the greatest temporal component of all CLPX sites. Measurements made at the LSOS were designed to produce a comprehensive assessment of the snow, soil, and vegetation characteristics viewed by the ground-based remote sensing instruments. The objective of the ground-based microwave remote sensing was to collect time series of active and passive microwave spectral signatures over snow, soil, and forest, which is coincident with the intensive physical characterization of these features. Ground-based remote sensing instruments included frequency modulated continuous wave (FMCW) radars operating over multiple microwave bandwidths; the Ground-Based Microwave Radiometer (GBMR-7) operating at channels 18.7, 23.8, 36.5, and 89 GHz; and in 2003, an L-, C-, X- and Ku-band scatterometer radar system. Snow and soil measurements included standard snow physical properties, snow wetness, snow depth transects, and soil moisture. The stem and canopy temperature and xylem sap flux of several trees were monitored continuously. Five micrometeorological towers monitored ambient conditions and provided forcing datasets for 1D snow and soil models. Arrays of pyranometers (0.3–3 μm) and a scanning thermal radiometer (8–12 μm) characterized the variability of radiative receipt in the forests. A field spectroradiometer measured the hyperspectral hemispherical-directional reflectance of the snow surface. These measurements, together with the ground-based remote sensing, provide the framework for evaluating and improving microwave radiative transfer models and coupling them to land surface models. The dataset is archived at the National Snow and Ice Data Center (NSIDC) in Boulder, Colorado.

Corresponding author address: Janet P. Hardy, CRREL, Engineer Research and Development Center, U.S. Army Corps of Engineers, 72 Lyme Road, Hanover, NH 03755. Email: janet.p.hardy@usace.army.mil

This article included in the The Cold Land Processes Experiment (CLPX) special collection.

Abstract

The local scale observation site (LSOS) is the smallest study site (0.8 ha) of the 2002/03 Cold Land Processes Experiment (CLPX) and is located within the Fraser mesocell study area. It was the most intensively measured site of the CLPX, and measurements here had the greatest temporal component of all CLPX sites. Measurements made at the LSOS were designed to produce a comprehensive assessment of the snow, soil, and vegetation characteristics viewed by the ground-based remote sensing instruments. The objective of the ground-based microwave remote sensing was to collect time series of active and passive microwave spectral signatures over snow, soil, and forest, which is coincident with the intensive physical characterization of these features. Ground-based remote sensing instruments included frequency modulated continuous wave (FMCW) radars operating over multiple microwave bandwidths; the Ground-Based Microwave Radiometer (GBMR-7) operating at channels 18.7, 23.8, 36.5, and 89 GHz; and in 2003, an L-, C-, X- and Ku-band scatterometer radar system. Snow and soil measurements included standard snow physical properties, snow wetness, snow depth transects, and soil moisture. The stem and canopy temperature and xylem sap flux of several trees were monitored continuously. Five micrometeorological towers monitored ambient conditions and provided forcing datasets for 1D snow and soil models. Arrays of pyranometers (0.3–3 μm) and a scanning thermal radiometer (8–12 μm) characterized the variability of radiative receipt in the forests. A field spectroradiometer measured the hyperspectral hemispherical-directional reflectance of the snow surface. These measurements, together with the ground-based remote sensing, provide the framework for evaluating and improving microwave radiative transfer models and coupling them to land surface models. The dataset is archived at the National Snow and Ice Data Center (NSIDC) in Boulder, Colorado.

Corresponding author address: Janet P. Hardy, CRREL, Engineer Research and Development Center, U.S. Army Corps of Engineers, 72 Lyme Road, Hanover, NH 03755. Email: janet.p.hardy@usace.army.mil

This article included in the The Cold Land Processes Experiment (CLPX) special collection.

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  • Chang, A. T. C., Foster J. L. , and Hall D. K. , 1987: Nimbus-7 SMMR derived global snow cover parameters. Ann. Glaciol., 9 , 3944.

  • De Roo, R. D., Chang A. R. , and England A. W. , 2007: Radiobrightness at 6.7-, 19-, and 37-GHz downwelling from mature evergreen trees observed during the Cold Lands Processes Experiment in Colorado. IEEE Trans. Geosci. Remote Sens., 45 , 32243229.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Elder, K., Cline D. , Goodbody A. , Houser P. , Liston G. , Mahrt L. , and Rutter N. , 2009a: NASA Cold Land Processes Experiment (CLPX 2002/03): Ground-based and near-surface meteorological observations. J. Hydrometeor., in press.

    • Search Google Scholar
    • Export Citation
  • Elder, K., Cline D. , Liston G. , and Armstrong R. , 2009b: NASA Cold Land Processes Experiment (CLPX 2002/03): Field measurements of snowpack properties and soil moisture. J. Hydrometeor., in press.

    • Search Google Scholar
    • Export Citation
  • Fischman, M. A., 2001: Development of a direct-sampling digital correlation radiometer for Earth remote sensing applications. Ph.D. dissertation, University of Michigan, 232 pp.

  • Granier, A., 1987: Evaluation of transpiration in a Douglas-fir stand by means of sap flow measurements. Tree Physiol., 3 , 309320.

  • Kazama, S., Rose T. , Zimmerman R. , and Zimmerman R. , 1999: A precision autocalibrating 7 channel radiometer for environmental research applications. J. Remote Sens. Soc. Japan, 19 , 265273.

    • Search Google Scholar
    • Export Citation
  • Marks, D., Reba M. , Pomeroy J. , Link T. , Winstral A. , Flerchinger G. , and Elder K. , 2008: Comparing simulated and measured sensible and latent heat fluxes over snow under a pine canopy to improve an energy balance snowmelt model. J. Hydrometeor., 9 , 15061522.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • McDonald, K. C., Zimmermann R. , Way J. B. , and Chun W. , 1999: Automated instrumentation for continuous monitoring of the dielectric properties of woody vegetation: System design, implementation, and selected in situ measurements. IEEE Trans. Geosci. Remote Sens., 37 , 18801894.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Sarabandi, K., and Ulaby F. T. , 1990: A convenient technique for polarimetric calibration of single-antenna radar systems. IEEE Trans. Geosci. Remote Sens., 28 , 10221033.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Schmugge, T. S., Kustas W. P. , Ritchie J. C. , Jackson T. J. , and Rango A. , 2002: Remote sensing in hydrology. Adv. Water Resour., 25 , 13671385.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • Stove, A. G., 1992: Linear FMCW radar techniques. IEE Proc. Part F: Radar Signal Process., 139 , 342350.

  • Tassoudji, M. A., Sarabandi K. , and Ulaby F. T. , 1989: Design consideration and implementation of the LCX polarimetric scatterometer (POLARSCAT). Radiation Laboratory Rep. 022486-T-2, 79 pp.

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