MozartV1, PascalFrancis, Corpus, bibRecord, 000194

Seasonal variation of methane, water vapor, and nitrogen oxides near the tropopause: Satellite observations and model simulations

Identifieur interne : 000194 ( PascalFrancis/Corpus ); précédent : 000193; suivant : 000195

Seasonal variation of methane, water vapor, and nitrogen oxides near the tropopause: Satellite observations and model simulations

Auteurs : MIJEONG PARK ; William J. Randel ; Douglas E. Kinnison ; Rolando R. Garcia ; WOOKAP CHOI

Source :

Journal of geophysical research [ 0148-0227 ] ; 2004.

RBID : Pascal:04-0207035

Descripteurs français

Pascal (Inist)
- Variation saisonnière, Méthane, Vapeur eau, Azote oxyde, Satellite NEAR, Tropopause, Observation par satellite, Modèle chimique, Simulation numérique, Occultation, Satellite UARS, Interaction stratosphère troposphère, Ozone, Traceur, Stratosphère, Troposphère, Foudre, Paramétrisation, Mousson été, Atmosphère claire, Hémisphère Nord.

English descriptors

KwdEn :
- Chemical model, Clear air, NEAR satellite, Nitrogen oxide, Northern Hemisphere, Occultation, Parameterization, Satellite observation, Stratosphere troposphere coupling, Summer monsoon, Tropopause, UARS satellite, digital simulation, lightning, methane, ozone, seasonal variations, stratosphere, tracers, troposphere, water vapor.

Abstract

Received 21 April 2003; revised 19 [i] Seasonal variations of several trace constituents near the tropopause are analyzed based on satellite measurements, and results are compared to a recent numerical model simulation. We examine methane, water vapor, and nitrogen oxides (NO_x) derived from Halogen Occultation Experiment (HALOE) satellite observations; these species have strong gradients near the tropopause, so that their seasonality is indicative of stratosphere-troposphere exchange (STE) and circulation in the near-tropopause region. Model results are from the Model for Ozone and Related Chemical Tracers (MOZART) stratosphere-troposphere chemical transport model (CTM). Results show overall good agreement between observations and model simulations for methane and water vapor, whereas nitrogen oxides near the tropopause are much lower in the model than suggested by HALOE data. The latter difference is probably related to the lightning and convective parameterizations incorporated in MOZART, which produce NO_x maxima not near the tropopause, but in the upper troposphere. Constituent seasonal variations highlight the imporatance of the Northern Hemisphere (NH) summer monsoons as regions for transport into the lowermost stratosphere. In MOZART, there is clear evidence that air from the monsoon region is transported into the tropics and entrained into the upward Brewer-Dobson circulation, bypassing the tropical tropopause.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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A03		`1`		`@0 J. geophys. res.`
A05				`@2 109`
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A11	`01`	`1`		`@1 MIJEONG PARK`
A11	`02`	`1`		`@1 RANDEL (William J.)`
A11	`03`	`1`		`@1 KINNISON (Douglas E.)`
A11	`04`	`1`		`@1 GARCIA (Rolando R.)`
A11	`05`	`1`		`@1 WOOKAP CHOI`
A14	`01`			`@1 School of Earth and Environmental Sciences, Seoul National University @2 Seoul @3 KOR @Z 1 aut.`
A14	`02`			`@1 National Center for Atmospheric Research @2 Boulder, Colorado @3 USA @Z 2 aut. @Z 3 aut. @Z 4 aut.`
A14	`03`			`@1 Wookap School of Earth and Environmental Sciences, Seoul National University @2 Seoul @3 KOR @Z 5 aut.`
A20				`@2 D03301.1-D03302.16`
A21				`@1 2004`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 3144 @5 354000119345860220`
A44				`@0 0000 @1 © 2004 INIST-CNRS. All rights reserved.`
A45				`@0 1 P.1/4`
A47	`01`	`1`		`@0 04-0207035`
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A61				`@0 A`
A64	`01`	`1`		`@0 Journal of geophysical research`
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C01	`01`		`ENG`	@0 Received 21 April 2003; revised 19 [i] Seasonal variations of several trace constituents near the tropopause are analyzed based on satellite measurements, and results are compared to a recent numerical model simulation. We examine methane, water vapor, and nitrogen oxides (NO_x) derived from Halogen Occultation Experiment (HALOE) satellite observations; these species have strong gradients near the tropopause, so that their seasonality is indicative of stratosphere-troposphere exchange (STE) and circulation in the near-tropopause region. Model results are from the Model for Ozone and Related Chemical Tracers (MOZART) stratosphere-troposphere chemical transport model (CTM). Results show overall good agreement between observations and model simulations for methane and water vapor, whereas nitrogen oxides near the tropopause are much lower in the model than suggested by HALOE data. The latter difference is probably related to the lightning and convective parameterizations incorporated in MOZART, which produce NO_x maxima not near the tropopause, but in the upper troposphere. Constituent seasonal variations highlight the imporatance of the Northern Hemisphere (NH) summer monsoons as regions for transport into the lowermost stratosphere. In MOZART, there is clear evidence that air from the monsoon region is transported into the tropics and entrained into the upward Brewer-Dobson circulation, bypassing the tropical tropopause.
C02	`01`	`2`		`@0 220`
C02	`02`	`3`		`@0 001E`
C03	`01`	`2`	`FRE`	`@0 Variation saisonnière @5 26`
C03	`01`	`2`	`ENG`	`@0 seasonal variations @5 26`
C03	`01`	`2`	`SPA`	`@0 Variación estacional @5 26`
C03	`02`	`2`	`FRE`	`@0 Méthane @5 27`
C03	`02`	`2`	`ENG`	`@0 methane @5 27`
C03	`02`	`2`	`SPA`	`@0 Metano @5 27`
C03	`03`	`2`	`FRE`	`@0 Vapeur eau @5 28`
C03	`03`	`2`	`ENG`	`@0 water vapor @5 28`
C03	`03`	`2`	`SPA`	`@0 Vapor agua @5 28`
C03	`04`	`X`	`FRE`	`@0 Azote oxyde @5 29`
C03	`04`	`X`	`ENG`	`@0 Nitrogen oxide @5 29`
C03	`04`	`X`	`SPA`	`@0 Nitrógeno óxido @5 29`
C03	`05`	`X`	`FRE`	`@0 Satellite NEAR @5 30`
C03	`05`	`X`	`ENG`	`@0 NEAR satellite @5 30`
C03	`05`	`X`	`SPA`	`@0 Satélite NEAR @5 30`
C03	`06`	`X`	`FRE`	`@0 Tropopause @5 31`
C03	`06`	`X`	`ENG`	`@0 Tropopause @5 31`
C03	`06`	`X`	`SPA`	`@0 Tropopausa @5 31`
C03	`07`	`X`	`FRE`	`@0 Observation par satellite @5 32`
C03	`07`	`X`	`ENG`	`@0 Satellite observation @5 32`
C03	`07`	`X`	`SPA`	`@0 Observación por satélite @5 32`
C03	`08`	`X`	`FRE`	`@0 Modèle chimique @5 33`
C03	`08`	`X`	`ENG`	`@0 Chemical model @5 33`
C03	`08`	`X`	`SPA`	`@0 Modelo químico @5 33`
C03	`09`	`2`	`FRE`	`@0 Simulation numérique @5 34`
C03	`09`	`2`	`ENG`	`@0 digital simulation @5 34`
C03	`09`	`2`	`SPA`	`@0 Simulación numérica @5 34`
C03	`10`	`X`	`FRE`	`@0 Occultation @5 35`
C03	`10`	`X`	`ENG`	`@0 Occultation @5 35`
C03	`10`	`X`	`SPA`	`@0 Ocultación @5 35`
C03	`11`	`X`	`FRE`	`@0 Satellite UARS @5 36`
C03	`11`	`X`	`ENG`	`@0 UARS satellite @5 36`
C03	`11`	`X`	`SPA`	`@0 Satélite UARS @5 36`
C03	`12`	`X`	`FRE`	`@0 Interaction stratosphère troposphère @5 37`
C03	`12`	`X`	`ENG`	`@0 Stratosphere troposphere coupling @5 37`
C03	`12`	`X`	`SPA`	`@0 Interacción estratósfera tropósfera @5 37`
C03	`13`	`2`	`FRE`	`@0 Ozone @5 38`
C03	`13`	`2`	`ENG`	`@0 ozone @5 38`
C03	`13`	`2`	`SPA`	`@0 Ozono @5 38`
C03	`14`	`2`	`FRE`	`@0 Traceur @5 39`
C03	`14`	`2`	`ENG`	`@0 tracers @5 39`
C03	`14`	`2`	`SPA`	`@0 Trazador @5 39`
C03	`15`	`2`	`FRE`	`@0 Stratosphère @5 40`
C03	`15`	`2`	`ENG`	`@0 stratosphere @5 40`
C03	`15`	`2`	`SPA`	`@0 Estratosfera @5 40`
C03	`16`	`2`	`FRE`	`@0 Troposphère @5 41`
C03	`16`	`2`	`ENG`	`@0 troposphere @5 41`
C03	`17`	`2`	`FRE`	`@0 Foudre @5 42`
C03	`17`	`2`	`ENG`	`@0 lightning @5 42`
C03	`17`	`2`	`SPA`	`@0 Rayo @5 42`
C03	`18`	`X`	`FRE`	`@0 Paramétrisation @5 43`
C03	`18`	`X`	`ENG`	`@0 Parameterization @5 43`
C03	`18`	`X`	`SPA`	`@0 Parametrización @5 43`
C03	`19`	`X`	`FRE`	`@0 Mousson été @5 44`
C03	`19`	`X`	`ENG`	`@0 Summer monsoon @5 44`
C03	`19`	`X`	`SPA`	`@0 Monzón verano @5 44`
C03	`20`	`X`	`FRE`	`@0 Atmosphère claire @5 45`
C03	`20`	`X`	`ENG`	`@0 Clear air @5 45`
C03	`20`	`X`	`SPA`	`@0 Atmósfera clara @5 45`
C03	`21`	`2`	`FRE`	`@0 Hémisphère Nord @5 46`
C03	`21`	`2`	`ENG`	`@0 Northern Hemisphere @5 46`
C03	`21`	`2`	`SPA`	`@0 Hemisferio norte @5 46`
N21				`@1 138`
N82				`@1 OTO`

Format Inist (serveur)

NO :	PASCAL 04-0207035 INIST
ET :	Seasonal variation of methane, water vapor, and nitrogen oxides near the tropopause: Satellite observations and model simulations
AU :	MIJEONG PARK; RANDEL (William J.); KINNISON (Douglas E.); GARCIA (Rolando R.); WOOKAP CHOI
AF :	School of Earth and Environmental Sciences, Seoul National University/Seoul/Corée, République de (1 aut.); National Center for Atmospheric Research/Boulder, Colorado/Etats-Unis (2 aut., 3 aut., 4 aut.); Wookap School of Earth and Environmental Sciences, Seoul National University/Seoul/Corée, République de (5 aut.)
DT :	Publication en série; Niveau analytique
SO :	Journal of geophysical research; ISSN 0148-0227; Etats-Unis; Da. 2004; Vol. 109; No. D3; D03301.1-D03302.16; Bibl. 1 P.1/4
LA :	Anglais
EA :	Received 21 April 2003; revised 19 [i] Seasonal variations of several trace constituents near the tropopause are analyzed based on satellite measurements, and results are compared to a recent numerical model simulation. We examine methane, water vapor, and nitrogen oxides (NO_x) derived from Halogen Occultation Experiment (HALOE) satellite observations; these species have strong gradients near the tropopause, so that their seasonality is indicative of stratosphere-troposphere exchange (STE) and circulation in the near-tropopause region. Model results are from the Model for Ozone and Related Chemical Tracers (MOZART) stratosphere-troposphere chemical transport model (CTM). Results show overall good agreement between observations and model simulations for methane and water vapor, whereas nitrogen oxides near the tropopause are much lower in the model than suggested by HALOE data. The latter difference is probably related to the lightning and convective parameterizations incorporated in MOZART, which produce NO_x maxima not near the tropopause, but in the upper troposphere. Constituent seasonal variations highlight the imporatance of the Northern Hemisphere (NH) summer monsoons as regions for transport into the lowermost stratosphere. In MOZART, there is clear evidence that air from the monsoon region is transported into the tropics and entrained into the upward Brewer-Dobson circulation, bypassing the tropical tropopause.
CC :	220; 001E
FD :	Variation saisonnière; Méthane; Vapeur eau; Azote oxyde; Satellite NEAR; Tropopause; Observation par satellite; Modèle chimique; Simulation numérique; Occultation; Satellite UARS; Interaction stratosphère troposphère; Ozone; Traceur; Stratosphère; Troposphère; Foudre; Paramétrisation; Mousson été; Atmosphère claire; Hémisphère Nord
ED :	seasonal variations; methane; water vapor; Nitrogen oxide; NEAR satellite; Tropopause; Satellite observation; Chemical model; digital simulation; Occultation; UARS satellite; Stratosphere troposphere coupling; ozone; tracers; stratosphere; troposphere; lightning; Parameterization; Summer monsoon; Clear air; Northern Hemisphere
SD :	Variación estacional; Metano; Vapor agua; Nitrógeno óxido; Satélite NEAR; Tropopausa; Observación por satélite; Modelo químico; Simulación numérica; Ocultación; Satélite UARS; Interacción estratósfera tropósfera; Ozono; Trazador; Estratosfera; Rayo; Parametrización; Monzón verano; Atmósfera clara; Hemisferio norte
LO :	INIST-3144.354000119345860220
ID :	04-0207035

Links to Exploration step

Pascal:04-0207035

Le document en format XML

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<front><div type="abstract" xml:lang="en">Received 21 April 2003; revised 19 [i] Seasonal variations of several trace constituents near the tropopause are analyzed based on satellite measurements, and results are compared to a recent numerical model simulation. We examine methane, water vapor, and nitrogen oxides (NO<sub>x</sub>
) derived from Halogen Occultation Experiment (HALOE) satellite observations; these species have strong gradients near the tropopause, so that their seasonality is indicative of stratosphere-troposphere exchange (STE) and circulation in the near-tropopause region. Model results are from the Model for Ozone and Related Chemical Tracers (MOZART) stratosphere-troposphere chemical transport model (CTM). Results show overall good agreement between observations and model simulations for methane and water vapor, whereas nitrogen oxides near the tropopause are much lower in the model than suggested by HALOE data. The latter difference is probably related to the lightning and convective parameterizations incorporated in MOZART, which produce NO<sub>x</sub>
 maxima not near the tropopause, but in the upper troposphere. Constituent seasonal variations highlight the imporatance of the Northern Hemisphere (NH) summer monsoons as regions for transport into the lowermost stratosphere. In MOZART, there is clear evidence that air from the monsoon region is transported into the tropics and entrained into the upward Brewer-Dobson circulation, bypassing the tropical tropopause.</div>
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<fA64 i1="01" i2="1"><s0>Journal of geophysical research</s0>
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<fA66 i1="01"><s0>USA</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>Received 21 April 2003; revised 19 [i] Seasonal variations of several trace constituents near the tropopause are analyzed based on satellite measurements, and results are compared to a recent numerical model simulation. We examine methane, water vapor, and nitrogen oxides (NO<sub>x</sub>
) derived from Halogen Occultation Experiment (HALOE) satellite observations; these species have strong gradients near the tropopause, so that their seasonality is indicative of stratosphere-troposphere exchange (STE) and circulation in the near-tropopause region. Model results are from the Model for Ozone and Related Chemical Tracers (MOZART) stratosphere-troposphere chemical transport model (CTM). Results show overall good agreement between observations and model simulations for methane and water vapor, whereas nitrogen oxides near the tropopause are much lower in the model than suggested by HALOE data. The latter difference is probably related to the lightning and convective parameterizations incorporated in MOZART, which produce NO<sub>x</sub>
 maxima not near the tropopause, but in the upper troposphere. Constituent seasonal variations highlight the imporatance of the Northern Hemisphere (NH) summer monsoons as regions for transport into the lowermost stratosphere. In MOZART, there is clear evidence that air from the monsoon region is transported into the tropics and entrained into the upward Brewer-Dobson circulation, bypassing the tropical tropopause.</s0>
</fC01>
<fC02 i1="01" i2="2"><s0>220</s0>
</fC02>
<fC02 i1="02" i2="3"><s0>001E</s0>
</fC02>
<fC03 i1="01" i2="2" l="FRE"><s0>Variation saisonnière</s0>
<s5>26</s5>
</fC03>
<fC03 i1="01" i2="2" l="ENG"><s0>seasonal variations</s0>
<s5>26</s5>
</fC03>
<fC03 i1="01" i2="2" l="SPA"><s0>Variación estacional</s0>
<s5>26</s5>
</fC03>
<fC03 i1="02" i2="2" l="FRE"><s0>Méthane</s0>
<s5>27</s5>
</fC03>
<fC03 i1="02" i2="2" l="ENG"><s0>methane</s0>
<s5>27</s5>
</fC03>
<fC03 i1="02" i2="2" l="SPA"><s0>Metano</s0>
<s5>27</s5>
</fC03>
<fC03 i1="03" i2="2" l="FRE"><s0>Vapeur eau</s0>
<s5>28</s5>
</fC03>
<fC03 i1="03" i2="2" l="ENG"><s0>water vapor</s0>
<s5>28</s5>
</fC03>
<fC03 i1="03" i2="2" l="SPA"><s0>Vapor agua</s0>
<s5>28</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Azote oxyde</s0>
<s5>29</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Nitrogen oxide</s0>
<s5>29</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Nitrógeno óxido</s0>
<s5>29</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Satellite NEAR</s0>
<s5>30</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>NEAR satellite</s0>
<s5>30</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Satélite NEAR</s0>
<s5>30</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Tropopause</s0>
<s5>31</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Tropopause</s0>
<s5>31</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Tropopausa</s0>
<s5>31</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Observation par satellite</s0>
<s5>32</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Satellite observation</s0>
<s5>32</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Observación por satélite</s0>
<s5>32</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Modèle chimique</s0>
<s5>33</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Chemical model</s0>
<s5>33</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Modelo químico</s0>
<s5>33</s5>
</fC03>
<fC03 i1="09" i2="2" l="FRE"><s0>Simulation numérique</s0>
<s5>34</s5>
</fC03>
<fC03 i1="09" i2="2" l="ENG"><s0>digital simulation</s0>
<s5>34</s5>
</fC03>
<fC03 i1="09" i2="2" l="SPA"><s0>Simulación numérica</s0>
<s5>34</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Occultation</s0>
<s5>35</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Occultation</s0>
<s5>35</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Ocultación</s0>
<s5>35</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Satellite UARS</s0>
<s5>36</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>UARS satellite</s0>
<s5>36</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Satélite UARS</s0>
<s5>36</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Interaction stratosphère troposphère</s0>
<s5>37</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Stratosphere troposphere coupling</s0>
<s5>37</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Interacción estratósfera tropósfera</s0>
<s5>37</s5>
</fC03>
<fC03 i1="13" i2="2" l="FRE"><s0>Ozone</s0>
<s5>38</s5>
</fC03>
<fC03 i1="13" i2="2" l="ENG"><s0>ozone</s0>
<s5>38</s5>
</fC03>
<fC03 i1="13" i2="2" l="SPA"><s0>Ozono</s0>
<s5>38</s5>
</fC03>
<fC03 i1="14" i2="2" l="FRE"><s0>Traceur</s0>
<s5>39</s5>
</fC03>
<fC03 i1="14" i2="2" l="ENG"><s0>tracers</s0>
<s5>39</s5>
</fC03>
<fC03 i1="14" i2="2" l="SPA"><s0>Trazador</s0>
<s5>39</s5>
</fC03>
<fC03 i1="15" i2="2" l="FRE"><s0>Stratosphère</s0>
<s5>40</s5>
</fC03>
<fC03 i1="15" i2="2" l="ENG"><s0>stratosphere</s0>
<s5>40</s5>
</fC03>
<fC03 i1="15" i2="2" l="SPA"><s0>Estratosfera</s0>
<s5>40</s5>
</fC03>
<fC03 i1="16" i2="2" l="FRE"><s0>Troposphère</s0>
<s5>41</s5>
</fC03>
<fC03 i1="16" i2="2" l="ENG"><s0>troposphere</s0>
<s5>41</s5>
</fC03>
<fC03 i1="17" i2="2" l="FRE"><s0>Foudre</s0>
<s5>42</s5>
</fC03>
<fC03 i1="17" i2="2" l="ENG"><s0>lightning</s0>
<s5>42</s5>
</fC03>
<fC03 i1="17" i2="2" l="SPA"><s0>Rayo</s0>
<s5>42</s5>
</fC03>
<fC03 i1="18" i2="X" l="FRE"><s0>Paramétrisation</s0>
<s5>43</s5>
</fC03>
<fC03 i1="18" i2="X" l="ENG"><s0>Parameterization</s0>
<s5>43</s5>
</fC03>
<fC03 i1="18" i2="X" l="SPA"><s0>Parametrización</s0>
<s5>43</s5>
</fC03>
<fC03 i1="19" i2="X" l="FRE"><s0>Mousson été</s0>
<s5>44</s5>
</fC03>
<fC03 i1="19" i2="X" l="ENG"><s0>Summer monsoon</s0>
<s5>44</s5>
</fC03>
<fC03 i1="19" i2="X" l="SPA"><s0>Monzón verano</s0>
<s5>44</s5>
</fC03>
<fC03 i1="20" i2="X" l="FRE"><s0>Atmosphère claire</s0>
<s5>45</s5>
</fC03>
<fC03 i1="20" i2="X" l="ENG"><s0>Clear air</s0>
<s5>45</s5>
</fC03>
<fC03 i1="20" i2="X" l="SPA"><s0>Atmósfera clara</s0>
<s5>45</s5>
</fC03>
<fC03 i1="21" i2="2" l="FRE"><s0>Hémisphère Nord</s0>
<s5>46</s5>
</fC03>
<fC03 i1="21" i2="2" l="ENG"><s0>Northern Hemisphere</s0>
<s5>46</s5>
</fC03>
<fC03 i1="21" i2="2" l="SPA"><s0>Hemisferio norte</s0>
<s5>46</s5>
</fC03>
<fN21><s1>138</s1>
</fN21>
<fN82><s1>OTO</s1>
</fN82>
</pA>
</standard>
<server><NO>PASCAL 04-0207035 INIST</NO>
<ET>Seasonal variation of methane, water vapor, and nitrogen oxides near the tropopause: Satellite observations and model simulations</ET>
<AU>MIJEONG PARK; RANDEL (William J.); KINNISON (Douglas E.); GARCIA (Rolando R.); WOOKAP CHOI</AU>
<AF>School of Earth and Environmental Sciences, Seoul National University/Seoul/Corée, République de (1 aut.); National Center for Atmospheric Research/Boulder, Colorado/Etats-Unis (2 aut., 3 aut., 4 aut.); Wookap School of Earth and Environmental Sciences, Seoul National University/Seoul/Corée, République de (5 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Journal of geophysical research; ISSN 0148-0227; Etats-Unis; Da. 2004; Vol. 109; No. D3; D03301.1-D03302.16; Bibl. 1 P.1/4</SO>
<LA>Anglais</LA>
<EA>Received 21 April 2003; revised 19 [i] Seasonal variations of several trace constituents near the tropopause are analyzed based on satellite measurements, and results are compared to a recent numerical model simulation. We examine methane, water vapor, and nitrogen oxides (NO<sub>x</sub>
) derived from Halogen Occultation Experiment (HALOE) satellite observations; these species have strong gradients near the tropopause, so that their seasonality is indicative of stratosphere-troposphere exchange (STE) and circulation in the near-tropopause region. Model results are from the Model for Ozone and Related Chemical Tracers (MOZART) stratosphere-troposphere chemical transport model (CTM). Results show overall good agreement between observations and model simulations for methane and water vapor, whereas nitrogen oxides near the tropopause are much lower in the model than suggested by HALOE data. The latter difference is probably related to the lightning and convective parameterizations incorporated in MOZART, which produce NO<sub>x</sub>
 maxima not near the tropopause, but in the upper troposphere. Constituent seasonal variations highlight the imporatance of the Northern Hemisphere (NH) summer monsoons as regions for transport into the lowermost stratosphere. In MOZART, there is clear evidence that air from the monsoon region is transported into the tropics and entrained into the upward Brewer-Dobson circulation, bypassing the tropical tropopause.</EA>
<CC>220; 001E</CC>
<FD>Variation saisonnière; Méthane; Vapeur eau; Azote oxyde; Satellite NEAR; Tropopause; Observation par satellite; Modèle chimique; Simulation numérique; Occultation; Satellite UARS; Interaction stratosphère troposphère; Ozone; Traceur; Stratosphère; Troposphère; Foudre; Paramétrisation; Mousson été; Atmosphère claire; Hémisphère Nord</FD>
<ED>seasonal variations; methane; water vapor; Nitrogen oxide; NEAR satellite; Tropopause; Satellite observation; Chemical model; digital simulation; Occultation; UARS satellite; Stratosphere troposphere coupling; ozone; tracers; stratosphere; troposphere; lightning; Parameterization; Summer monsoon; Clear air; Northern Hemisphere</ED>
<SD>Variación estacional; Metano; Vapor agua; Nitrógeno óxido; Satélite NEAR; Tropopausa; Observación por satélite; Modelo químico; Simulación numérica; Ocultación; Satélite UARS; Interacción estratósfera tropósfera; Ozono; Trazador; Estratosfera; Rayo; Parametrización; Monzón verano; Atmósfera clara; Hemisferio norte</SD>
<LO>INIST-3144.354000119345860220</LO>
<ID>04-0207035</ID>
</server>
</inist>
</record>

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Seasonal variation of methane, water vapor, and nitrogen oxides near the tropopause: Satellite observations and model simulations

Seasonal variation of methane, water vapor, and nitrogen oxides near the tropopause: Satellite observations and model simulations

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