NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
A Statistical Comparison of PSC Model Simulations and POAM ObservationsA better knowledge of PSC composition and formation mechanisms is important to better understand and predict stratospheric ozone depletion. Several past studies have attempted to compare modeling results with satellite observations. These comparisons have concentrated on case studies. In this paper we adopt a statistical approach. POAM PSC observations from several Arctic winters are categorized into Type Ia and Ib PSCs using a technique based on Strawa et al. The discrimination technique has been modified to employ the wavelengths dependence of the extinction signal at all wavelengths rather than only at 603 and 10 18 nm. Winter-long simulations for the 1999-2000 Arctic winter have been made using the IMPACT model. These simulations have been constrained by aircraft observations made during the SOLVE/THESEO 2000 campaign. A complete set of winter-long simulations was run for several different microphysical and PSC formation scenarios. The simulations give us perfect knowledge of PSC type (Ia, Ib, or II), composition, especially condensed phase HNO3 which is important for denitrification, and condensed phase H2O. Comparisons are made between the simulation and observation of PSC extinction at 1018 rim versus wavelength dependence, winter-long percentages of Ia and Ib occurrence, and temporal and altitude trends of the PSCs. These comparisons allow us to comment on how realistic some modeling scenarios are.
Document ID
20020094295
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Strawa, A. W.
(NASA Ames Research Center Moffett Field, CA United States)
Drdla, K.
(NASA Ames Research Center Moffett Field, CA United States)
Fromm, M.
(NASA Ames Research Center Moffett Field, CA United States)
Bokarius, K.
(NASA Ames Research Center Moffett Field, CA United States)
Gore, Warren J.
Date Acquired
August 20, 2013
Publication Date
January 1, 2002
Subject Category
Environment Pollution
Meeting Information
Meeting: Polar Ozone and Aerosol Measurement (POAM) Science Team Meeting
Location: Coolfont, WV
Country: United States
Start Date: October 28, 2002
End Date: October 29, 2002
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

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