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- 1. Exploring atmospheric, Earth system, and solar processes, variability, and change
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- Research Catalog
Mijeong Park
General Information
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ACD - TIIMES
Project Scientist
UTLS
Contact Information:
PO Box 3000, Boulder, CO 80307-3000
Office: FL0-2156
Telephone: 303-497-1436
Email: mijeong@ucar.edu
Vita
Research Focus FY08:
Near-global observations of carbon monoxide (CO) at 100 hPa obtained from Microwave Limb Sounder (MLS) observations during July-August 2005. The strong maximum over Asia is associated with the monsoon anticyclone in the upper troposphere, as identified by the wind vectors (from NCEP reanalysis data). From Park et al, 2007.
High resolution figure
The Satellite Data Analysis Group in ACD focuses on studies of global scale chemical behavior using satellite measurements, meteorological data sets and model simulations. Recent work has focused on understanding the chemical and dynamical behavior of the tropopause region, and its long-term variability, to help quantify processes which contribute to coupling in the upper troposphere - lower stratosphere (UTLS).
Mijeong Park used Microwave Limb Sounder (MLS) satellite observations to study constituent variability in the Asian summer monsoon anticyclone in the UTLS region. The monsoon anticyclone is a hemispheric-scale circulation associated with persistent deep convection over India and Southeast Asia during Northern Hemisphere summer (June-August). The strong circulation acts to confine and isolate air within the anticyclone in the UTLS region (~12-18 km). Carbon monoxide (CO) measured by MLS shows a persistent maximum within the anticyclone throughout summer (Fig. 2), which results from the vertical transport of near-surface air into the upper troposphere by deep convection. This association is supported by strong temporal correlation between CO and the underlying deep convection. MLS measurements of ozone and water vapor confirm this overall paradigm of upward transport and horizontal confinement. Ongoing work involves quantifying pathways for transport into and out of the anticyclone, plus studying the influence of the anticyclone on stratosphere-troposphere coupling.
Publications FY08:
Park, M., W. J. Randel, L. K. Emmons, P. F. Bernath, K. A. Walker, C. D. Boone, 2008: Chemical isolation in the Asian monsoon anticyclone observed in Atmospheric Chemistry Experiment (ACE-FTS) data. Atmos. Chem. Phys., 8, 757-764.
Randel, W. J., M. Park, F. Wu, N. Livesey, 2007: A large annual cycle in ozone above the tropical tropopause linked to the Brewer Dobson circulation. J. Atmos. Sci., 64, 4479-4488, doi: 10.1175/2007JAS2409.1.