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Evaluation of Multiangle Imaging Spectroradiometer cloud motion vectors using NOAA radar wind profiler data
 

Summary: Evaluation of Multiangle Imaging Spectroradiometer cloud motion
vectors using NOAA radar wind profiler data
Laura M. Hinkelman,1
Roger T. Marchand,1
and Thomas P. Ackerman1
Received 22 October 2008; revised 3 August 2009; accepted 13 August 2009; published 11 November 2009.
[1] Cloud motion vectors obtained stereoscopically by the Multiangle Imaging
Spectroradiometer (MISR) are evaluated. The reference data for this assessment is taken
from 23 sites in NOAA's radar wind profiler network located across the central United
States. Agreement between the two data sets is appraised as a function of cloud top
height, MISR wind retrieval quality estimates, and version of the stereoscopic retrieval
algorithm. For ``Best Winds'' retrievals, the comparison between matched MISR and
NOAA profiler wind components yields biases of about 1.3 m sĄ1
with standard
deviations of 4­6 m sĄ1
. Comparisons are better for winds retrieved close to the surface
than at high altitudes. Updates to the MISR stereoscopic retrieval algorithm have
improved the level of agreement over time. Tightening of MISR data quality standards
has also improved agreement, but at the expense of decreasing the number of available
MISR wind vector estimates.

  

Source: Ackerman, Thomas P. - Department of Atmospheric Sciences, University of Washington at Seattle

 

Collections: Geosciences; Environmental Sciences and Ecology