INSTRUMENT Species ACVT subgroup : N O...

Atmospheric Chemistry Validation of ENVISAT – ESRIN - 3-7 May 2004Atmospheric Chemistry Validation of ENVISAT – ESRIN - 3-7 May 2004

INSTRUMENT SpeciesACVT subgroup : N2O MIPAS

Claude Camy-PeyretLaboratoire de Physique Moléculaire et Applications

CNRS/UPMC, France

Validation of N2O profiles with correlative data from ground stations starting at slide 21

and

Validation of N2O profiles with correlative data from:

- Balloon (H. Oelhaf, M. Pirre, C. Camy-Peyret, A. Engel, F. Mencaraglia)

Aircraft (U. Cortesi, C. Blom)


BalloonH. Oelhaf

Forschungszentrum Karlsruhe/Institut für Meteorologie und Klimaforschung, GermanyA. Engel

Universität Frankfurt/Institut für Meteorologie und Geophysik, GermanyM. Pirre

Laboratoire de Chimie Physique de l’Environnement, Orléans, FranceC. Camy-Peyret

Laboratoire de Physique Moléculaire et Applications, Paris, France

F. MencaragliaInstitute for Applied Physics “Nello Carrara”, IFAC-CNR, Florence, Italy


IBEX Balloon measurements - N2O

Measurements (8 profiles, 4 hours) taken over mediterranean Mipas data within a +/- 2days window


N2O: MIPAS-B vs. MIPAS-E

0,1

1

10

100

-100 -50 0 50 100 150 200 250 300 350 400 450

-100 -50 0 50 100 150 200 250 300 350 400 450

Aire: 24 September 2002 Seq. N3 MIPAS-E (E): 24-Sep-2002 22:07:50 V4.61 MIPAS-E : 24-Sep-2002 22:07:50 V4.55 MIPAS-B (B): 24-Sep-2002 22:21:42 Absolute Diff. (B-E) Combined errors

MIPAS-B error bars: 1σ accuracyMIPAS-E error bars: only noise error

Absolute difference (ppbv) N2O(ppbv)

Rec.16 - North

Pres

sure

(hPa

)

MIPAS-B

Forschungszentrum Karlsruhein der Helmholtz-Gemeinschaft


Cryosampler 24.9.2002 vs ESA Retrieval ver 4.61- trajectory mapping for +/- 5 days: 125 matches with 49 orbits


MIPAS orbit 2968 (scans 12 -14)

N2O

cryosampler validation 24.9.2002

vs MIPAS ver 4.61

Trajectory Mapping:

red: cryosampler

blue: MIPAS, forw. trajectories

green MIPAS, back trajectories

MIPAS symbol size reflectstrajectory time difference (large symbols are nearer in time)


cryosampler validation24.9.2002 vs ESA Retrieval ver 4.61 with trajectory

mapping

comparison of CH4 - N2O correlation

unrealisticly high values(above tropospheric values) found for both N2O and CH4

in ver 4.61

red: cryosampler

blue: MIPAS, forw. trajectories

green MIPAS, back trajectories


SPIRALE/MIPAS_200209

300

400

500

600

700

800

900

1000

0 50 100 150 200 250 300 350 400

N2O(ppb)

Teta

(K)

Black line with 3% error bar: SPIRALE on October 2, 2002(0715-0840UT)MIPAS on trajectories ending at the SPIRALE location:

Circle: MIPAS on September 28, Square: MIPAS on September 27,Diamond: MIPAS on September 26,

Aire sur l’Adour (43 N, 0 E)


Blue full line: ATMOS correlations at mid-latitudeBlack crosses with 3% error bars: SPIRALE on October 2, 2002

Pink square with 10% error bars: MIPAS

Aire sur l’Adour (43 N, 0 E)corrélations CH4-N2O (Michelsen et al. , GRL, 1 Août 98)

0,000,200,400,600,801,001,201,401,601,802,002,20

0 50 100 150 200 250 300 350 400

N2O (ppb)

CH

4 (p

pm)


Kiruna 68 N, 20E

Full line with 3% error bars: SPIRALESquare with error bars: MIPAS

SPIRALE/MIPAS 20032101_195233

10

15

20

25

30

35

-50 0 50 100 150 200 250 300 350 400N2O(ppb)

h(km

)


SPIRALE/MIPAS 20032101

1517192123252729313335

64 66 68 70 72

Latitude

h (k

m) MIPAS_195233

SPIRALEMIPAS195354


15

20

25

30

35

20 22 24 26 28 30 32 34 36

Longitude East

h(km

)


15

20

25

30

35

21 21,5 22 22,5 23 23,5

local time

h (k

m)

Black full line: SPIRALE, Pink full line MIPAS at 19:52:33 UT


15

16

1718

19

20

2122

23

24

2526

27

28

2930

31

32

0,00 0,05 0,10 0,15 0,20 0,25 0,30

66.2°N15.9°E16:10 UT

66.8°N23.2°E15:38 UT

LPMA66.2 °N17.8 °E16:01 UT

MIPAS (IMK) :65.7°N 13.4°E21:13 UT

N2O VMR (ppmv)

altit

ude

(km

)N2O: LPMA vs. MIPAS-E

4 March 2003 from Esrange


U. CortesiInstitute for Applied Physics “Nello Carrara”, IFAC-CNR, Florence, Italy

C. BlomForschungszentrum Karlsruhe/Institut für Meteorologie und limaforschung, Germany

Aircraft


Atmospheric Chemistry Validation of ENVISAT – ESRIN - 3-7 May 2004Atmospheric Chemistry Validation of ENVISAT – ESRIN - 3-7 May 2004N2O: MIPAS-STR vs. MIPAS-E 22.7.02 Orbit 2051



M-55 Geophysica mid-latitude flights, October 2002MIPAS-ENVISAT N2O validation with SAFIRE-A

Institute for Applied Physics “Nello Carrara”, IFAC-CNR, Florence, Italy

Scan 15 (21:23)

Scan 14 (21:22)

Scan 16 (21:24)


October 24th, 2002 – ENVISAT orbit 3403, MIPAS scan 15N2O VMR measurements: comparison MIPAS versus SAFIRE-A


October 24th, 2002 – ENVISAT orbit 3403, MIPAS scan 14N2O VMR measurements: comparison MIPAS versus SAFIRE-A


M-55 Geophysica flight October 24th, 2002N2O measurements: intercomparison SAFIRE-A versus HAGAR


Conclusions

Precision : ± 10 % (seems better than for CH4)but

“zigzag” profiles in the lower stratosphereoutliers in the CH4-N2O correlationAccuracyMIPAS may have too high values in the lower stratosphere/upper troposphereComparison with the IMK off-line processor (G. Stiller)smoother profilesbetter agreement

Comparison with MIPAS 4.61 N2O profiles


Acknowledgements

Thanks to all the providers of material/plates for this presentation

H. Oelhaf, (balloon), G. Stiller (IMK processor), C. Blom (aircraft) Forschungszentrum Karlsruhe/Institut für Meteorologie und Klimaforschung, Germany

A. Engel (balloon)Universität Frankfurt/Institut für Meteorologie und Geophysik, Germany

M. Pirre (balloon)Laboratoire de Chimie Physique de l’Environnement, Orléans, France

C. Camy-Peyret (balloon)Laboratoire de Physique Moléculaire et Applications, Paris, France

U. Cortesi, (aircraft), F. Mencaraglia (balloon)Institute for Applied Physics “Nello Carrara”, IFAC-CNR, Florence, Italy

Sorry for those having correlative data but not having sent them to the designatedpresenter



INSTRUMENT SpeciesACVT subgroup: N2O MIPAS

Claude Camy-PeyretLaboratoire de Physique Moléculaire et Applications

CNRS/UPMC, France

Validation of N2O profiles with correlative data from ground stations

Ground based FTIR (Th. Blumenstock, M. De Mazière)



100

10

1

0,0 0,1 0,2 0,3 0,4 0,5-0,04 0,00 0,04

N2OKiruna, 20020719MIPAS Orbit 2008

13:04, FTIR 09:08, MIPAS 4.61 in FTIR resolution 09:08, MIPAS 4.61, original

Volume mixing ratio [ppmv]

pres

uure

[hP

a]

FTIR-MIPAS [ppmv]

17 coincidences from 20020718 to 20021101

N2O an example:

Comparisons of MIPAS 4.61 N2O profiles with ground-based FTIR at Kiruna


Statistics


10

15

20

25

30

-0,04 -0,02 0,00 0,02 0,04 -20 0 2010

15

20

25

3017 coincidences N2O, FTIR Kiruna

FTIR - MIPAS [ppmv]

Hei

ght [

km]

(FTIR - MIPAS) / FTIR [%]

Comparisons of MIPAS 4.61 N2O profiles with ground-based FTIR at Kiruna


Comparisons of MIPAS 4.61 N2O “stratospheric“ columns with ground-based FTIR at

ISSJ-Jungfraujoch


Comparisons of MIPAS 4.61 N2O profiles

with ground-based FTIR at ISSJ-Jungfraujoch


Comparison of ground based FTIR profiles with MIPAS 4.61 N2O profiles

Better agreement for N2O than for CH4

Precision: ± 10 % except in the UT/LS where larger differences can be observed (zigzag)

Limited vertical resolution of ground based FTIR profiles underlines the importance of using appropriate averaging kernels for comparisonUpper part of the FTIR profiles largely constrained by a priori

Possibility to make a statistics on a larger number of profiles than with balloon/aircraft. FTIR useful for trend comparisons with MIPAS

Conclusions


Acknowledgements

Thanks to all the providers of material/plates for this presentation

T. Blumenstock (ground based FTIR)Forschungszentrum Karlsruhe/Institut für Meteorologie und Klimaforschung, Germany

M. De Mazière (ground based FTIR), representing the NDSC community at largeBIRA-IASB, Belgian Institute for Space Aeronomy, Brussels, Belgium

Sorry for those having correlative data but not having sent them to the designated presenter

INSTRUMENT Species ACVT subgroup : N O...

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