EOS CHEM EOS CHEM Platform Orbit Polar 705
EOS CHEM
EOS CHEM Platform • Orbit: Polar: 705 km, sun-synchronous, 98 o inclination, ascending 1: 45 PM +/- 15 min. equator crossing time. • Launch date - 4 th quarter, 2002, Delta 7920. • CHEM will follow AQUA in the same orbit by 15 minutes. • Six Year Life MLS HIRDLS TES OMI EOS CHEM
EOS CHEM Project NASA HQ NASA GSFC Program Scientist Project Scientists Project Managers P. De. Cola M. Schoeberl P. Sabelhaus A. Douglass M. Luce E. Hilsenrath S. Gallagher Instrument PI’s HIRDLS MLS OMI TES UCB-Oxford J. Gille, J. Barnett JPL J. Waters KNMI/NIVR P. Levelt JPL R. Beer EOS CHEM
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? EOS CHEM
HIRDLS • High Resolution Dynamics Limb Sounder – Limb emission, IR 6. 12 -17. 76 m, 1 km vertical, 10 km cross track, high horizontal resolution scanner (500 -3, 000 km wide, 6 positions) – Stratospheric radicals: O 3, NO 2 – Stratospheric Reservoirs: Cl. ONO 2, HNO 3, N 2 O 5 – Tracers: CFC-11, CFC-12, CH 4, H 2 O, N 2 O – Temperature, Geopotential height – Aerosols Extinction Coef. (4 channels) – Upper tropospheric cirrus EOS CHEM
MLS • Microwave Limb Sounder – Limb emission, resolution 1. 5 -3 km vertical, 3 -10 km cross track. – Stratospheric Radicals: O 3, OH, HO 2, Cl. O, HOCl, Br. O. – Stratospheric Reservoirs: HCl, HNO 3. – Tracers: N 2 O, H 2 O, SO 2, CO, HCN – Upper tropospheric O 3, H 2 O, Cirrus ice, HCN, and CO. – Temperature and Geopotential height. EOS CHEM
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. 3 x 8. 5 km – Tropospheric and stratospheric O 3, H 2 O, CH 4, CO, HNO 3, NO 2 – Aerosols, Temperature – Spectral Coverage 3. 2 - 15. 4 mm EOS CHEM
OMI • Ozone Monitoring Instrument – Nadir solar backscatter spectrometer, 13 x 24 km footprint – Radicals: Column O 3, NO 2, Br. O, OCl. O, O 3 profile ~ 5 km resolution – Tracers: Column SO 2 – Aerosols (smoke, dust and sulfates) – Cloud top press. , cloud coverage – Surface UVB – Tropospheric ozone (when combined with MLS or HIRDLS) EOS CHEM
CHEM Animation
Science Strategy: Is the ozone layer changing as expected? • Major ozone controlling gases will be measured within the same air mass. • Key Radicals: O 3, OH, HO 2, Cl. O, Br. O , NO 2 • Key Reservoirs: HCl, N 2 O 5, Cl. ONO 2, HNO 3 • Key Source Gases: N 2 O, CH 4, CFC-11, CFC-12, H 2 O Color Code: MLS, HIRDLS, Both • OMI will continue the column ozone record of TOMS and provide profiles of O 3. • TES provide additional measurements of O 3, H 2 O, HNO 3, NO 2, CH 4, CO. EOS CHEM
Changing Stratospheric Halogens from UARS ( EOS CHEM Anderson et al. 1999 )
Science Strategy: What are the sources of tropospheric pollutants? Measurement of process that control tropospheric ozone • TES: O 3, NO 2, CO, CH 4, HNO 3 • OMI: Column O 3, NO 2, Br. O, Aerosols Global Nitrogen Dioxide Urban Air Pollution • HIRDLS: H 2 O, HNO 3, O 3 transport from stratosphere • MLS: UT CO, O 3 and H 2 O • Residual Trop. Ozone OMI & MLS, HIRDLS Biomass Burning Global Ozone Monitoring Experiment (GOME) on ERS-2. Total column NO 2 showing effects of urban areas in N. Hemisphere, biomass burning in Southern Hemisphere. Courtesy J. Burrows, Univ. of Bremen EOS CHEM
Science Strategy: What is the role of upper tropospheric water vapor, ozone and aerosols in climate change? • MLS: cirrus ice, H 2 O, CO, O 3 • HIRDLS: LS/UT clouds, aerosols, O 3 and H 2 O • TES: H 2 O, CO, O 3 • OMI: Tropospheric aerosols • Temperatures from MLS, HIRDLS & TES EOS CHEM
CHEM’s Contribution to our Understanding of Cloud Process GOES/ Triana CHEM MLS H 2 O Sounding Forecast Cloud Conditions EOS CHEM Cloud. Sat Picasso AQUA MODIS/ CERES Determines the IR Properties of Clouds AIRS Temperature and H 2 O Sounding
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: O 3, H 2 O, CFC’s, N 2 O, CH 4 – Temperature, Geopotential height HIRDLS scan pattern overlaid on Reverse Domain Fill simulation of N 2 O at 20 km. EOS CHEM
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/ EOS CHEM
EOS CHEM Working Groups Science Algorithm A. Douglass P. Bhartia Mission Operations Education & Outreach A. Kelly E. Hilsenrath Data Systems Validation S. Larson L. Froidevaux Aerosol S. Massie EOS CHEM
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