New Technique for Retrieving Liquid Water Path over Land using Satellite Microwave Observations

Deeter, M N; Vivekanandan, J

Title: New Technique for Retrieving Liquid Water Path over Land using Satellite Microwave Observations

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Abstract

We present a new methodology for retrieving liquid water path over land using satellite microwave observations. As input, the technique exploits the Advanced Microwave Scanning Radiometer for earth observing plan (EOS) (AMSR-E) polarization-difference signals at 37 and 89 GHz. Regression analysis performed on model simulations indicates that over variable atmospheric and surface conditions the polarization-difference signals can be simply parameterized in terms of the surface emissivity polarization difference ({Delta}{var_epsilon}), surface temperature, liquid water path (LWP), and precipitable water vapor (PWV). The resulting polarization-difference parameterization (PDP) enables fast and direct (noniterative) retrievals of LWP with minimal requirements for ancillary data. Single- and dual-channel retrieval methods are described and demonstrated. Data gridding is used to reduce the effects of instrumental noise. The methodology is demonstrated using AMSR-E observations over the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site during a six day period in November and December, 2003. Single- and dual-channel retrieval results mostly agree with ground-based microwave retrievals of LWP to within approximately 0.04 mm.

Authors:: Deeter, M N; Vivekanandan, J

Publication Date:: Fri Mar 18 00:00:00 EST 2005

Research Org.:: Research Applications Library, National Center for Atmospheric Research Boulder, Colorado (US)

Sponsoring Org.:: Sponsor not identified (US)

OSTI Identifier:: 841634

Resource Type:: Conference

Resource Relation:: Conference: Fifteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting, Daytona Beach, FL (US), 03/14/2005--03/18/2005; Other Information: PBD: 18 Mar 2005

Country of Publication:: United States

Language:: English

Subject:: 54 ENVIRONMENTAL SCIENCES; EMISSIVITY; POLARIZATION; RADIATIONS; RADIOMETERS; REGRESSION ANALYSIS; SATELLITES; USA; WATER; WATER VAPOR; SATELLITE OBSERVATIONS; CLOUDS; PROPERTIES

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                    Deeter, M N, and Vivekanandan, J. New Technique for Retrieving Liquid Water Path over Land using Satellite Microwave Observations.  United States: N. p., 2005. 
        Web.

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                    Deeter, M N, & Vivekanandan, J. New Technique for Retrieving Liquid Water Path over Land using Satellite Microwave Observations.  United States.

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                    Deeter, M N, and Vivekanandan, J. 2005.  
        "New Technique for Retrieving Liquid Water Path over Land using Satellite Microwave Observations".  United States.  https://www.osti.gov/servlets/purl/841634.

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@article{osti_841634,

  title        = {New Technique for Retrieving Liquid Water Path over Land using Satellite Microwave Observations},

  author       = {Deeter, M N and Vivekanandan, J},

  abstractNote = {We present a new methodology for retrieving liquid water path over land using satellite microwave observations. As input, the technique exploits the Advanced Microwave Scanning Radiometer for earth observing plan (EOS) (AMSR-E) polarization-difference signals at 37 and 89 GHz. Regression analysis performed on model simulations indicates that over variable atmospheric and surface conditions the polarization-difference signals can be simply parameterized in terms of the surface emissivity polarization difference ({Delta}{var_epsilon}), surface temperature, liquid water path (LWP), and precipitable water vapor (PWV). The resulting polarization-difference parameterization (PDP) enables fast and direct (noniterative) retrievals of LWP with minimal requirements for ancillary data. Single- and dual-channel retrieval methods are described and demonstrated. Data gridding is used to reduce the effects of instrumental noise. The methodology is demonstrated using AMSR-E observations over the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site during a six day period in November and December, 2003. Single- and dual-channel retrieval results mostly agree with ground-based microwave retrievals of LWP to within approximately 0.04 mm.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/841634},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Fri Mar 18 00:00:00 EST 2005},

  month        = {Fri Mar 18 00:00:00 EST 2005}

}

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