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EOS CHEM

EOS CHEM. MLS. HIRDLS. TES. OMI. EOS CHEM Platform. Orbit: Polar: 705 km, sun-synchronous, 98 o inclination, ascending 1:45 PM +/- 15 min. equator crossing time. Launch date - 4th quarter, 2002, Delta 7920. CHEM will follow AQUA in the same orbit by 15 minutes. Six Year Life.

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EOS CHEM

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  1. EOS CHEM

  2. MLS HIRDLS TES OMI EOS CHEM Platform • Orbit: Polar: 705 km, sun-synchronous, 98o inclination, ascending 1:45 PM +/- 15 min. equator crossing time. • Launch date - 4th quarter, 2002, Delta 7920. • CHEM will follow AQUA in the same orbit by 15 minutes. • Six Year Life

  3. EOS CHEM Project NASA HQ NASA GSFC Project Scientists M. Schoeberl A. Douglass E. Hilsenrath Project Managers P. Sabelhaus M. Luce S. Gallagher Program Scientist P. DeCola Instrument PI’s HIRDLS UCB-Oxford J. Gille, J. Barnett MLS JPL J. Waters OMI KNMI/NIVR P. Levelt TES JPL R. Beer

  4. EOS CHEM Science Questions • Is the ozone layer changing as expected? • Do we understand the transport of gases within the stratosphere and between the stratosphere and troposphere? • What are the sources of tropospheric pollutants? • What are the roles of upper tropospheric water vapor, aerosols and ozone in climate change?

  5. HIRDLS • High Resolution Dynamics Limb Sounder • Limb emission, IR 6.12-17.76m, 1 kmvertical, 10 km cross track, high horizontal resolution scanner (500-3,000 km wide, 6 positions) • Stratospheric radicals: O3, NO2 • Stratospheric Reservoirs: ClONO2, HNO3,N2O5 • Tracers: CFC-11, CFC-12, CH4, H2O, N2O • Temperature, Geopotential height • Aerosols Extinction Coef. (4 channels) • Upper tropospheric cirrus

  6. MLS • Microwave Limb Sounder • Limb emission, resolution 1.5-3 km vertical, 3-10 km cross track. • Stratospheric Radicals: O3, OH, HO2, ClO, HOCl, BrO. • Stratospheric Reservoirs: HCl, HNO3. • Tracers: N2O, H2O, SO2,CO, HCN • Upper tropospheric O3, H2O, Cirrus ice, HCN, and CO. • Temperature and Geopotential height.

  7. TES • Tropospheric Emission Spectrometer • Nadir and limb Fourier transform emission spectrometer • Limb mode, 2.3 km vertical resolution, coverage 0-34 km • Nadir mode, 5.3x8.5 km • Tropospheric and stratospheric O3, H2O, CH4, CO, HNO3, NO, NO2 • Aerosols, Temperature • Spectral Coverage 3.2 - 15.4 mm

  8. OMI • Ozone Monitoring Instrument • Nadir solar backscatter spectrometer, 13x24 km footprint • Radicals: Column O3, NO2, BrO, OClO, O3 profile ~ 5 km resolution • Tracers: Column SO2 • Aerosols (smoke, dust and sulfates) • Cloud top press., cloud coverage • Surface UVB • Tropospheric ozone (when combined with MLS or HIRDLS)

  9. CHEM Animation

  10. Science Strategy: Is the ozone layer changing as expected? • Major ozone controlling gases will be measured within the same air mass. • Key Radicals: O3, OH, HO2, ClO, BrO , NO2 • Key Reservoirs: HCl, N2O5,ClONO2,HNO3 • Key Source Gases: N2O, CH4, CFC-11, CFC-12,H2O Color Code: MLS, HIRDLS,Both • OMI will continue the column ozone record of TOMS and provide profiles of O3. • TES provide additional measurements of O3, H2O, HNO3, NO2, CH4, CO.

  11. Changing Stratospheric Halogens from UARS ( Anderson et al. 1999 )

  12. Science Strategy:What are the sources of tropospheric pollutants? Urban Air Pollution Measurement of process that control tropospheric ozone • TES: O3, NO, NO2, CO, CH4, HNO3 • OMI: Column O3, NO2, BrO, Aerosols • HIRDLS: H2O, HNO3, O3 transport from stratosphere • MLS: UT CO, O3 and H2O • Residual Trop. Ozone OMI & MLS, HIRDLS Global Nitrogen Dioxide Biomass Burning Global Ozone Monitoring Experiment (GOME) on ERS-2. Total column NO2 showing effects of urban areas in N. Hemisphere, biomass burning in Southern Hemisphere. Courtesy J. Burrows, Univ. of Bremen

  13. Science Strategy:What is the role of upper tropospheric water vapor, ozone and aerosols in climate change? • MLS: cirrus ice, H2O, CO, O3 • HIRDLS: LS/UT clouds, aerosols, O3 and H2O • TES: H2O, CO, O3 • OMI: Tropospheric aerosols • Temperatures from MLS, HIRDLS & TES

  14. CloudSat Picasso CHEM’s Contribution to our Understanding of Cloud Process GOES/ Triana CHEM AQUA MLS - H2O Sounding MODIS/ CERES Determines the IR Properties of Clouds AIRS Temperature and H2O Sounding Forecast Cloud Conditions

  15. Science Strategy: Do we understand the transport of gases within the stratosphere, and between the stratosphere and troposphere? • High resolution measurements of upper troposphere and lower stratospheric variability from HIRDLS • Trace gases: O3, H2O, CFC’s, N2O, CH4 • Temperature, Geopotential height HIRDLS scan pattern overlaid on Reverse Domain Fill simulation of N2O at 20 km.

  16. EOS CHEM Summary • EOS CHEM will make important measurements of the chemistry and dynamics of the stratosphere. • All of the important radical, reservoir and source gases in the stratosphere • Most measurements will be within the same air mass. • High horizontal and vertical resolution data from HIRDLS • Continuation of the column ozone record from TOMS by OMI • EOS CHEM will make new chemical measurements of the troposphere. • Ozone & nitrogen oxides from TES, OMI, MLS and HIRDLS • EOS CHEM will make important climate measurements. • Upper troposphere ozone, water vapor, clouds and temperature from MLS, TES and HIRDLS • Aerosols and clouds from OMI • Measurements near coincident with AQUA http://eos-chem.gsfc.nasa.gov/

  17. EOS CHEM Working Groups Science A. Douglass Algorithm P. Bhartia Mission Operations A. Kelly Education & Outreach E. Hilsenrath Data Systems S. Larson Validation L. Froidevaux Aerosol S. Massie

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