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Tropospheric Ozone from Assimilation of Aura Data using Different Definitions of the TropopauseOzone data from Aura OMI and MLS instruments were assimilated into the general circulation model (GCM) constrained by assimilated meteorological fields from the Global Modeling and Assimilation Office at NASA Goddard. Properties of tropospheric ozone and their sensitivity to the definition of the tropopause are investigated. Three definitions of the tropopause are considered: (1) dynamical (using potential vorticity and potential temperature), (2) using temperature lapse rate, and (3) using a fixed ozone value. Comparisons of the tropospheric ozone columns using these tropopause definitions will be presented and evaluated against coincident profiles from ozone sondes. Assimilated ozone profiles are used to identify possible tropopause folding events, which are important for stratosphere-troposphere exchange. Each profile is searched for multiple levels at which ozone attains the value typical of the troposphere-stratosphere transition in order to identify possible tropopause folds. Constrained by the dynamics from a global model and by assimilation of Aura ozone data every 3-hours, this data set provides an opportunity to study ozone evolution in the upper troposphere and lower stratosphere with high temporal resolution.
Document ID
20070015991
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Stajner, Ivanka
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wargan, K.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Chang, L.-P.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hayashi, H.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Pawson, S.
(NASA Headquarters Washington, DC United States)
Pawson, Steven
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Livesey, N.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bhartia, P. K.
(NASA Headquarters Washington, DC United States)
Date Acquired
August 23, 2013
Publication Date
September 15, 2006
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: EOS Aura Science and Validation Team meeting
Location: Boulder, CO
Country: United States
Start Date: September 11, 2006
End Date: September 15, 2006
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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