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| hasDataset_Title |
- Cross-Calibrated Multi-Platform Ocean Surface Wind Vector Analysis Product V2, 1987 - ongoing
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| hasReference |
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Atlas, R., R. N. Hoffman, J. Ardizzone, S. M. Leidner, J. C. Jusem,
D. K. Smith, D. Gombos, 2011: A cross-calibrated, multiplatform
ocean surface wind velocity product for meteorological and
oceanographic applications. Bull. Amer. Meteor. Soc, 92, 157-174
(DOI: 10.1175/2010BAMS2946.1), URL:
http://journals.ametsoc.org/doi/abs/10.1175/2010BAMS2946.1.
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| hasSummary |
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The CCMP data set combines cross-calibrated satellite microwave
winds and instrument observations using a Variational Analysis
Method (VAM) to produce high-resolution (0.25 degree) gridded
analyses. Satellite wind retrievals derived by Remote Sensing
Systems from a number of satellite-borne passive and active
microwave instruments are used. RSS intercalibrates radiometers at
the brightness temperature level to within 0.2 degree Celsius,
applying a refined sea-surface emissivity model and radiative
transfer function to derive surface winds. The resulting wind
retrievals are highly consistent between microwave radiometer
instrument platforms, including SSM/I, SSMIS, AMSR, TMI, WindSat,
and GMI. RSS has also developed a geophysical model function for
deriving wind speeds and directions from microwave scatterometers,
including QuikSCAT and ASCAT. Both radiometer and scatterometer data
are validated against ocean moored buoys, which confirm the
measurements are in agreement (to within 0.8 m/s) despite the
difference in wind measurement and retrieval methodologies. The VAM
combines RSS instrument data with moored buoy measurements and a
starting estimate (first-guess) of the wind field. The European
Center for Medium-Range Weather Forecasts (ECMWF) ERA-Interim
Reanalysis winds are used in the CCMP V2.0 processing as the
first-guess wind field. This 0.25 degree model wind field is
consistently processed, as opposed to that of the ECMWF operational
model for which the model changes over time. All wind observations
(satellite and buoy) and model analysis fields are referenced to a
height of 10 meters.
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