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HIRDLS Observations and Simulation of a Lower Stratospheric Intrusion of Tropical Air to High LatitudesOn 26 January 2006, the High Resolution Dynamic Limb Sounder (HIRDLS) observed low mixing ratios of ozone and nitric acid in an approximately 2 km vertical layer near 100 hPa extending from the subtropics to 55 degrees N over North America. The subsequent evolution of the layer is simulated with the Global Modeling Initiative (GMI) model and substantiated with HIRDLS observations. Air with low mixing ratios of ozone is transported poleward to 80 degrees N. Although there is evidence of mixing with extratropical air and diabatic descent, much of the tropical intrusion returns to the subtropics. This study demonstrates that HIRDLS and the GMI model are capable of resolving thin intrusion events. The observations combined with simulation are a first step towards development of a quantitative understanding of the lower stratospheric ozone budget.
Document ID
20080040780
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Olsen, Mark A. (Maryland Univ. College Park, MD, United States)
Douglass, Anne R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Newman, Paul A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Gille, John C. (Colorado Univ. Boulder, CO, United States)
Nardi, Bruno (National Center for Atmospheric Research Boulder, CO, United States)
Yudin, Valery A. (National Center for Atmospheric Research Boulder, CO, United States)
Kinnison, Douglas E. (National Center for Atmospheric Research Boulder, CO, United States)
Khosravi, Rashid (National Center for Atmospheric Research Boulder, CO, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2008
Subject Category
Geophysics
Distribution Limits
Public
Copyright
Public Use Permitted.

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