Atmospheric vertical profiles of O3, N2O, CH4, CCl2F2, and H2O retrieved from external-cavity quantum-cascade laser heterodyne radiometer measurements

被引：43
作者：
Tsai, Tracy R. [2 ]
Rose, Rebecca A. [1 ]
Weidmann, Damien [1 ]
Wysocki, Gerard [2 ]
机构：
[1] Rutherford Appleton Lab, Space Sci & Technol Dept, Didcot OX11 0QX, Oxon, England
[2] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA
来源：
APPLIED OPTICS | 2012年 / 51卷 / 36期
基金：
美国国家科学基金会;
关键词：
OZONE; SPECTROSCOPY; BALLOON; WAVE; HCL;
D O I：
10.1364/AO.51.008779
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Atmospheric vertical profiles of ozone, nitrous oxide, methane, dichlorodifluoromethane, and water are retrieved from data collected with a widely tunable external-cavity quantum-cascade laser heterodyne radiometer (EC-QC-LHR) covering a spectral range between 1120 and 1238 cm(-1). The instrument was operated in solar occultation mode during a two-month measurement campaign at Rutherford Appleton Laboratory in Oxfordshire, UK, in winter 2010/2011, and ultrahigh-resolution (60 MHz or 0.002 cm(-1)) transmission spectra were recorded for multiple narrow spectral windows (similar to 1 cm(-1) width) specific to each molecule. The ultrahigh spectral resolution of the EC-QC-LHR allows retrieving altitudinal profiles from transmission spectra that contain only few (1-3) significant absorption lines of a target molecule. Profiles are validated by comparing with European Centre for Medium-Range Weather Forecasts operational atmospheric profiles (ozone and water), with other data in the literature (nitrous oxide, methane, dichlorodifluoromethane), and with retrievals from a lower resolution (600 MHz or 0.02 cm(-1)) Fourier transform spectroscopy data that were also recorded during the measurement campaign. (C) 2012 Optical Society of America
引用
收藏
页码：8779 / 8792
页数：14
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