NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Total-sky and clear-sky variability of outgoing longwave radiation and shortwave radiation and its relation to cloud fluctuation statisticsCorrelation statistics are used to investigate some of the characteristic temporal and spatial scales of the day-to-day changes in cloudiness which tend to dominate the variance of outgoing LW radiation and SW radiation fields. The temporal decorrelation time of the radiation field as measured by the lag time required for the autocorrelation of a region to fall to 0.4 is about 12 hours in the midlatitude storm track. Decorrelation time approaches one to two days when the averaging area of the region is increased significantly. Decorrelation times are also longer in the equatorial and tropical regions. The short decorrelation times are a manifestation of the creation, breakup, and movement of cloud systems. Cross-correlation analysis of the radiation field in the midlatitude storm track region and the subtropical dry zone shows advection speeds that range from about 25 m/sec in the storm tracks to about 8 m/sec in the subtropical dry zone.
Document ID
19920031299
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bess, T. D.
(NASA Langley Research Center Hampton, VA, United States)
Charlock, Thomas P.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: Conference on Atmospheric Radiation
Location: San Francisco, CA
Country: United States
Start Date: July 23, 1990
End Date: July 27, 1990
Accession Number
92A13923
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available