DRAGON ADVANCED TRAINING COURSE IN ATMOSPHERE … · Day 1 Lecture 3 Plenary - Erkki Kyrölä 1...

Day 1 Lecture 3 Plenary - Erkki Kyrölä 1

DRAGON ADVANCED TRAINING COURSE IN ATMOSPHERE REMOTE SENSING

Dragon-StarErkki Kyrölä

Earth ObservationFinnish Meteorological Institute

1. Dragon-Star project2. Data sources3. Global results from GOMOS and OMI4. Ozone and NO2 in China5. Typhoons and ozone6. Assimilation7. Validation and simulation8. Summary and conclusions



Dragon-Star project

• Enhance use of Envisat atmospheric data formiddle atmosphere studies

• Compare satellite measurements over China and Chineseground-based measurements: validation

• Use data from Envisat GOMOS and MIPAS, OSIRIS on Odin and OMI on Eos-Aura to study local and global processes in the middle atmosphere



PI: Erkki Kyrölä, Finnish Meteorological Institute (FMI)Seppo Hassinen, FMI Johanna Tamminen, FMIEsko Kyrö, FMI

Co-PI: Qiu Hong, National Satellite Met. Center (NSMC)Hu Liqin, NSMCLi Xiaojing, NSMCYi Liu, Institute of Atmospheric Physics, Chinese Academy of Sciences

Christos S. Zerefos, University of AthensKostas Kourtidis, Demokritus University of Thrace

Paul C. Simon, Belgian Institute for Space Aeronomy - IASBBruno Carli, Italian National Research Centre (CNR)

Participants



* Launched in 2002* Stellar occultation and

scattered solar light* Limb geometry* Night (and day)* O3, NO2, Aerosols, Air* Vertical sampling < 1.7 km

* Launched in 2002* Stellar occultation and

scattered solar light* Limb geometry* Night (and day)* O3, NO2, Aerosols, Air* Vertical sampling < 1.7 km

GOMOS/ENVISAT



* Launched in 2001* Scattered solar light* Limb geometry* Day side measurements* O3, NO2, Aerosols, Air* About 900 meas. per day* Vertical sampling 1-3 km

* Launched in 2001* Scattered solar light* Limb geometry* Day side measurements* O3, NO2, Aerosols, Air* About 900 meas. per day* Vertical sampling 1-3 km

OSIRIS/Odin



OSIRIS*Launched in 2004* Scattered solar light* Nadir geometry* Global coverage in one

day, swath 2600km* O3, NO2, SO2, HCHO,

Aerosols, Air* Off-line global products,NRT products,VFD limited area products

*Launched in 2004* Scattered solar light* Nadir geometry* Global coverage in one

day, swath 2600km* O3, NO2, SO2, HCHO,

Aerosols, Air* Off-line global products,NRT products,VFD limited area products

Receiving stationOMI

http://omivfd.fmi.fi

OMI/EOS-Aura



Data sources

ImplementedFMI

GOMOS, OSIRISassimilated to FinRose model

Modelling

LimitedO3 profilesground stations

Ground based

2004-presentTOMS-alg.

O3 total columnsglobal coverage

OMI on EOS-Aura

2001-presentreproc. ongoing

O3, NO2, aerosolprofiles 600-800/day

OSIRIS on Odin

2002-presentreprocessed

O3, NO2, NO3, aerosol profiles300-400/day

GOMOS on Envisat

AvailabilityDataInstrument



Validation (global, China)

GOMOS

OSIRIS

OMI

MIPAS

Groundbased

GOME

Balis et al.,

Dragon Mid-term

Yi Liu et al.



50N-90N

20S-20N

Ozone peaks at 20 km or lowerStrong seasonal variationLarge total column

Ozone peaks 27 km Weak seasonal variationSmall total column

GOMOS ozone profiles vs time



Middle atmosphere over China

•Tibet plateau of low ozone• Polar ozone intrusions • Tropical ozone• Typhoons and ozone



13652 profiles

GOMOS night measurements over China in 2002-2006



North40-52 N, 116-134 EPolar ozone intrusions

South20-28 N, 102-122 E

Tropical ozone

Mid28-36 N, 102-122 ETibet reference

Tibet28-36 N,80-102 E

Low ozone



China Tibet China Mid

Low ozone over Tibet



Low ozone in Tibet plateau fromreduced tropospheric column:- Height- Plateau acts as a heating source



North-South variation



China NorthChina South

Vertical profiles and total ozone show clear differencesbetween south and north



Damrey (China-Vietnam) Typhoon, September 2005

ESA

Typhoons



OMI reflectivity



OMI reflectivity (zoom)



OMI total ozone



OMI total ozone (zoom)



Katarina 28.8. 2005OMI reflectivity



OMI reflectivity (zoom)



OMI total ozone



OMI total ozone (zoom)



Assimilation: FinRose CTMCTM

Horizontal regular grid 2.5°*5°32 vertical levels, subset of ECMWF levelsDynamics from ECMWFSemi-Lagrangian (Linn&Root) transport schemeChemistry including:About 40 chemical species, about 150 chemical reactionsPhotochemistry, PSC chemistrySequential assimilation schemeVariant of suboptimal Kalman filterTime window = time stepEach observation is assimilated separately



10^61/cm3

10^61/cm3

10^61/cm3

ExampleModel

Assimilation

model - assimilation

Alt 22 km, 06 Apr 2003



Greece contribution: GOME vs KUNMING - DOBSON



NSMC work: Radiative transfer simulations

220 240 260 280 300 320 340 360 380

0.0

0.2

0.4

0.6

0.8

1.0

20Km 25Km 30Km 40Km 50Km 70Km

For all absorption and scattering

Tran

smis

sion

wavelength(nm)220 240 260 280 300 320 340 360 380

0.0

0.2

0.4

0.6

0.8

1.0


scattering and O3 absorption

trans

mis

sion

wavelength(nm)

220 240 260 280 300 320 340 360 380

0.0

0.2

0.4

0.6

0.8

1.0

scattering and NO2 absorption

trans

mis

sion

wavelength(nm)


220 240 260 280 300 320 340 360 380

0.0

0.2

0.4

0.6

0.8

1.0

scattering and SO2 absorption


trans

mis

sion

wavelength(nm)

Effects of different absorber on the transmission of occultationobservation for GOMOS channel 1 (240-370nm)



Summary• GOMOS has measured since 2002• Yearly about 2000 measurements over China• OSIRIS has measured since 2001• OMI has measured since 2004 (daily coverage)• Excellent data set for middle atmosphere studies in global

and local scale• Assimilation fills data gaps and helps to understand

processes• Tibet ozone low, ozone intrusions from Arctic, seasonal

behaviour, trends

DRAGON ADVANCED TRAINING COURSE IN ATMOSPHERE … · Day 1 Lecture 3 Plenary - Erkki Kyrölä 1...

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