REMOTE SENSING OF TROPOSPHERIC COMPOSITION Daniel J Jacob
REMOTE SENSING OF TROPOSPHERIC COMPOSITION Daniel J. Jacob
WHY OBSERVE TROPOSPHERIC COMPOSITION FROM SPACE? Global/continuous measurement capability important for range of issues: Monitoring and forecasting of air quality: ozone, aerosols Long-range transport of pollution Monitoring of sources: pollution and greenhouse gases Radiative climate forcing FOUR OBSERVATION METHODS: • solar backscatter • thermal emission • solar occultation • lidar
TROPOSPHERIC COMPOSITION FROM SPACE: platforms, instruments, species Sensor TOMS GOME MOPITT MISR MODIS AIRS Platform multi ERS-2 (launch) (1979 -) (1995) ozone X (tropics) Terra (1999) Aqua ( 2002) MLS Envisat (2002) Aura (2004) X CO 2 CH 4 NO 2 SCIA- TES MACHY X X X X HCHO X Br. O X X X OCO 2008 X HNO 3 aerosol X OMI X
TROPOSPHERIC NO 2 FROM OMI: MAPPING OF NITROGEN OXIDE EMISSIONS October 2004 K. Folkert Boersma (Harvard)
TROPOSPHERIC NO 2 FROM OMI: ZOOM ON U. S. AND MEXICO MILAGRO campaign, March 2006 K. Folkert Boersma (Harvard)
FORMALDEHYDE FROM OMI: MAPPING OF REACTIVE HYDROCARBON SOURCES Shows vegetation to be dominant; anthropogenic source hardly detectable Thomas Kurosu (Harvard/SAO) and Dylan B. Millet (Harvard)
LOOKING TOWARD THE FUTURE: GEOSTATIONARY AND L 1 MISSIONS GEO L 1 • Continuous mapping of tropospheric columns of O 3, aerosols, CO, CH 2 O, NO 2, SO 2 • Continental-scale for GEO, full sunlit disk for L 1 • km-scale resolution
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