NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
A study of the influence of satellite data on GLA analyses over the Atlantic Ocean during a period of blocking anticyclone developmentThis paper presents a statistical diagnosis of the differences between two Goddard Laboratory for Atmospheres analysis representations of temperature and wind speed, one containing satellite data influences (SAT analyses) and one without (NOSAT analyses), for a case of oceanic blocking anticyclone development. Results, obtained using area means and standard deviations of the two fields and correlation coefficients and root-mean-square differences between the two fields, indicate that the inclusion of satellite data can have significant impact on ocean-domain analyses. This is especially evident if one examines higher-order fields that represent gradients in the basic variable fields or contain covariances between two different variables (e.g., advections). More specifically, the inclusion of satellite data resulted in a cold (warm) temperature bias at low (high) levels and weaker temperature gradients, stronger winds, weaker vertical wind shears, and a warm-air advection bias at most levels. The SAT analyses also exhibited larger standard deviations than the NOSAT for wind speed, relative vorticity, vorticity advection, temperature advection, and 500-mb height tendencies, suggesting that for this case the spatial variability of the circulation features were enhanced by the inclusion of satellite data. Even so, since height tendencies forced by vorticity and temperature advection were less sensitive to the addition of satellite data than were the advection quantities themselves, the dynamics of the blocking system was apparently less influenced by the presence of satellite data than was the structure of the system.
Document ID
19930064866
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lamberty, Gregory L.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Smith, Phillip J.
(Purdue Univ. West Lafayette, IN, United States)
Date Acquired
August 16, 2013
Publication Date
July 1, 1993
Publication Information
Publication: Monthly Weather Review
Volume: 121
Issue: 7
ISSN: 0027-0644
Subject Category
Meteorology And Climatology
Accession Number
93A48863
Funding Number(s)
CONTRACT_GRANT: NAG8-764
Distribution Limits
Public
Copyright
Other

Available Downloads

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