Evidence of H2O nonlocal thermodynamic equilibrium emission near 6.4 μm as measured by cryogenic infrared spectrometers and telescopes for the atmosphere (CRISTA 1)

被引:8
作者
Edwards, DP
Zaragoza, G
Riese, M
López-Puertas, M
机构
[1] Natl Ctr Atmospher Res, Boulder, CO 80307 USA
[2] CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain
[3] Berg Univ Gesamthsch Wuppertal, Dept Phys, D-42097 Wuppertal, Germany
来源
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES | 2000年 / 105卷 / D23期
关键词
D O I
10.1029/2000JD900350
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
The spectral region from 6.2 to 6.6 mum contains the strongest infrared bands of water vapor and is often used by satellite remote sounding instruments to obtain the middle atmosphere concentration of this gas. However, the diurnal variation in mesospheric H2O emission is not well understood owing to nonlocal thermodynamic equilibrium (non-LTE) processes. This has led to H2O retrieval problems with past satellite instruments. Spectral measurements taken by the Space Shuttle cryogenic infrared spectrometers and telescopes for the atmosphere (CRISTA 1) instrument have been used to study these infrared limb emissions. The H2O radiance shows a daytime enhancement in the mesosphere due to nonthermal collisions and solar absorption, We use a combination of measurements and modeling to determine consistent values for the collisional rate constants and photolysis quantum yield that affect the non-LTE processes. Our new estimates of these quantities should improve considerably the confidence in the mesospheric H2O retrievals that will be made by the EOS TIMED sounding of the atmosphere using broadband emission radiometry (SABER) and Aura high-resolution dynamics limb sounder (HIRDLS) instruments.
引用
收藏
页码:29003 / 29021
页数:19
相关论文
共 32 条
[1]  
BREEN JE, 1973, J CHEM PHYS, V83, P1648
[2]   The non-LTE correction to the vibrational component of the internal partition sum for atmospheric calculations [J].
Edwards, DP ;
Lopez-Puertas, M ;
Gamache, RR .
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, 1998, 59 (3-5) :423-436
[3]   NONLOCAL THERMODYNAMIC-EQUILIBRIUM STUDIES OF THE 15-MU-M BANDS OF CO2 FOR ATMOSPHERIC REMOTE-SENSING [J].
EDWARDS, DP ;
LOPEZPUERTAS, M ;
LOPEZVALVERDE, MA .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1993, 98 (D8) :14955-14977
[4]   Non-local thermodynamic equilibrium limb radiance near 10 mu m as measured by UARS CLAES [J].
Edwards, DP ;
Kumer, JB ;
LopezPuertas, M ;
Mlynczak, MG ;
Gopalan, A ;
Gille, JC ;
Roche, A .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1996, 101 (D21) :26577-26588
[5]  
EDWARDS DP, 1992, NCARTN367STR
[6]  
ENDEMANN M, 1993, P SPIE INT SOC OPT E, P13
[7]   A NEW NUMERICAL-MODEL OF THE MIDDLE ATMOSPHERE .2. OZONE AND RELATED SPECIES [J].
GARCIA, RR ;
SOLOMON, S .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1994, 99 (D6) :12937-12951
[8]  
GILLE JC, 1971, J ATMOS SCI, V28, P1427, DOI 10.1175/1520-0469(1971)028<1427:OTIOLR>2.0.CO
[9]  
2
[10]  
GILLE JC, 1992, REND SC INT FIS ENRI, V65, P433