Evaluation of suitable spectral intervals for near-IR laboratory detection of water vapour continuum absorption

被引:8
|
作者
Ptashnik, Igor V. [1 ]
机构
[1] Inst Atmospher Opt, Lab Atmospher Absorpt Spect, Tomsk 634055, Russia
来源
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER | 2007年 / 108卷 / 01期
基金
俄罗斯基础研究基金会;
关键词
water vapour; continuum; MT_CKD; HITRAN; Schwenke-partridge; spectral lines;
D O I
10.1016/j.jqsrt.2007.03.011
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The water vapour continuum absorption is an important component of molecular absorption of radiation in atmosphere. However, uncertainty in knowledge of the value of the continuum absorption at present can achieve 100% in different spectral regions leading to an error in flux calculation up to 3-5 W/m(2) global mean. This work uses line-by-line calculations to reveal the best spectral intervals for experimental verification of the CKD water vapour continuum models in the currently least-studied near-infrared spectral region. Possible sources of errors in continuum retrieval taken into account in the simulation include the sensitivity of laboratory spectrometers and uncertainties in the spectral line parameters in HITRAN-2004 and Schwenke-Partridge database. It is shown that a number of micro-windows in near-IR can be used at present for laboratory detection of the water vapour continuum with estimated accuracy from 30% to 5%. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:146 / 160
页数:15
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