REMOTE SENSING OF TROPOSPHERIC COMPOSITIONREMOTE SENSING OF TROPOSPHERIC COMPOSITION

Daniel J. Jacob

WHY OBSERVE TROPOSPHERIC COMPOSITION FROM SPACE?WHY OBSERVE TROPOSPHERIC COMPOSITION FROM SPACE?

Monitoring and forecastingof air quality: ozone, aerosols

Long-range transport of pollution

Monitoring of sources:pollution and greenhousegases

• solar backscatter• thermal emission• solar occultation• lidar

FOUR OBSERVATIONMETHODS:

Global/continuous measurement capability important for range of issues:

Radiative climate forcing

TROPOSPHERIC COMPOSITION FROM SPACE:TROPOSPHERIC COMPOSITION FROM SPACE:platforms, instruments, speciesplatforms, instruments, species

Sensor TOMS GOME MOPITT MISR MODIS AIRS SCIA-MACHY

TES MLS OMI OCO

Platform (launch)

multi

(1979-)

ERS-2 (1995)

Terra Aqua

(1999) ( 2002)

Envisat (2002)

Aura

(2004) 2008

ozone X (tro-pics)

X X X X

CO X X X X X

CO2 X X X

CH4 X

NO2 X X X

HNO3 X

HCHO X X

BrO X X X

aerosol X X

K. Folkert Boersma (Harvard)

TROPOSPHERIC NOTROPOSPHERIC NO22 FROM OMI: FROM OMI:

MAPPING OF NITROGEN OXIDE EMISSIONSMAPPING OF NITROGEN OXIDE EMISSIONS

October 2004

K. Folkert Boersma (Harvard)

TROPOSPHERIC NOTROPOSPHERIC NO22 FROM OMI: ZOOM ON U.S. AND MEXICO FROM OMI: ZOOM ON U.S. AND MEXICO

MILAGRO campaign, March 2006

FORMALDEHYDE FROM OMI:FORMALDEHYDE FROM OMI:MAPPING OF REACTIVE HYDROCARBON SOURCESMAPPING OF REACTIVE HYDROCARBON SOURCES

Shows vegetation to be dominant; anthropogenic source hardly detectable

Thomas Kurosu (Harvard/SAO) and Dylan B. Millet (Harvard)

• Continuous mapping of tropospheric columns of O3, aerosols, CO, CH2O, NO2, SO2

• Continental-scale for GEO, full sunlit disk for L1

• km-scale resolution

LOOKING TOWARD THE FUTURE:LOOKING TOWARD THE FUTURE:GEOSTATIONARY AND L1 MISSIONSGEOSTATIONARY AND L1 MISSIONS

GEO L1