HR: 0800h
AN: A11C-0601    [Abstracts]
TI: Global Climatology of Tropospheric CO from the Atmospheric InfraRed Sounder (AIRS): Interannual Variations in Emissions from Indonesia
AU: * McMillan, W W
EM: mcmillan@umbc.edu
AF: University of Maryland, Baltimore County, Department of Physics, 1000 Hilltop Circle, Baltimore, MD 21250-0001, United States
AU: Yurganov, L
EM: yurganov@umbc.edu
AF: Joint Center for Earth Systems Technology, UMBC, Department of Physics, 1000 Hilltop Circle, Baltimore, MD 21250-0001, United States
AB: Five years of CO retrievals from the Atmospheric InfraRed Sounder (AIRS) onboard NASA's Aqua satellite reveal variations in tropospheric CO on timescales from twelve hours to five years. The shorter timescales are invaluable to monitor daily variations in CO emissions, for three-dimensional tracking of atmospheric motions, and for insights into atmospheric mixing. Substantial interannual variations demonstrate year-to-year changes in rainfall and drought patterns in different seasons, e.g. the Northern Hemisphere boreal forests and South America. Variations on multi-year timescales exhibit the influence of planetary scale atmospheric perturbations. In particular, we observe a quasi-biennial variation in CO emissions from Indonesia with varying magnitudes in peak emission occurring in October 2002, 2004, and 2006. Examining satellite rainfall measurements over Indonesia, we find the enhanced CO emission correlates with occurrences of low rainfall during the month of October. MOPITT CO observations also reveal Indonesian CO total columns peaked in 2002, 2004, and 2006 relative to 2000-2001. Perhaps not coincidentally, 2002, 2004, and 2006 were all El Nino years. Unfortunately, neither AIRS nor MOPITT was in orbit during the intense 1997-1998 El Nino when Indonesia experienced unprecedented burning. Continuing the satellite record of tropospheric CO with measurements from the European IASI instrument will permit construction of a long time-series useful for further investigations of climatological variations in CO emissions and their impact on the health of the atmosphere.
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
DE: 3305 Climate change and variability (1616, 1635, 3309, 4215, 4513)
DE: 3360 Remote sensing
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting