89th American Meteorological Society Annual Meeting

Monday, 12 January 2009
A comparison of MISR cloud motion vectors and NOAA radar wind profiler data
Hall 5 (Phoenix Convention Center)
Laura M. Hinkelman, JISAO/Univ. of Washington, Seattle, WA; and R. T. Marchand and T. P. Ackerman
Cloud motion vectors obtained stereoscopically by the Multiangle Imaging

Spectroradiometer (MISR) have been evaluated. The reference data for this

assessment came from 23 sites in NOAA's radar wind profiler network located

across the central United States. Agreement between the two data sets was

appraised as a function of cloud top height, MISR wind retrieval quality

estimates, version of the stereoscopic retrieval algorithm, and wind direction.

For "best wind" retrievals, the agreement between MISR and NOAA profiler

wind measurements was similar to that found between wind profilers and

radiosondes in previous studies. Comparisons are better for clouds 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 the MISR

data quality standards has also improved agreement, but at the expense of

decreasing the number of available MISR wind vector estimates.

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