A case study of the sensitivity of forecast skill to data and data analysis techniquesA series of experiments have been conducted to examine the sensitivity of forecast skill to various data and data analysis techniques for the 0000 GMT case of January 21, 1979. These include the individual components of the FGGE observing system, the temperatures obtained with different satellite retrieval methods, and the method of vertical interpolation between the mandatory pressure analysis levels and the model sigma levels. It is found that NESS TIROS-N infrared retrievals seriously degrade a rawinsonde-only analysis over land, resulting in a poorer forecast over North America. Less degradation in the 72-hr forecast skill at sea level and some improvement at 500 mb is noted, relative to the control with TIROS-N retrievals produced with a physical inversion method which utilizes a 6-hr forecast first guess. NESS VTPR oceanic retrievals lead to an improved forecast over North America when added to the control.
Document ID
19840043494
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Baker, W. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Atlas, R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Halem, M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Susskind, J. (NASA Goddard Space Flight Center Laboratory for Atmospheric Sciences, Greenbelt, MD, United States)