The UV-A and visible solar irradiance spectrum: inter-comparison of absolutely calibrated, spectrally medium resolution solar irradiance spectra from balloon- and satellite-borne measurements
The UV-A and visible solar irradiance spectrum: inter-comparison of absolutely calibrated, spectrally medium resolution solar irradiance spectra from balloon- and satellite-borne measurements
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UV-A 和可见太阳辐照度光谱：来自气球和卫星测量的绝对校准、光谱中等分辨率太阳辐照度光谱的相互比较
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发表时间：
2004
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通讯作者：
K. Pfeilsticker
中科院分区：
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作者：
W. Gurlit;H. Bösch;H. Bovensmann;J. P. Burrows;A. Butz;C. Camy‐Peyret;M. Dorf;K. Gerilowski;A. Lindner;S. Noel;Ulrich Platt;F. Weidner;K. Pfeilsticker
抽象的。在ENVISAT/SCIAMACHY卫星验证的框架内，在紫外/可见光谱范围内以中等分辨率绝对测量太阳辐照度光谱（在316.7-418 nm的UV和400-652 nm的可见光下，半峰全宽分辨率为0.55 nm和1.48 nm，分别）从方位控制的LPMA/DOAS气球吊舱上在大约32公里的气球漂浮高度。在考虑了由于瑞利散射和气体吸收（O3和NO2）引起的大气消光后，将测得的太阳光谱与以前的观测结果进行了比较。我们的太阳辐照光谱与重新校准的Kurucz等人（1984）太阳光谱（Fontenla等人，1999，称为MODTRAN 3.7），但当Kurucz光谱与我们仪器的光谱分辨率卷积时，它在可见光谱范围（415-650 nm）内大+2.1%，在UV-A光谱范围（316.7-370 nm）内小-4%。SOLSPEC的类似比较（Thuillier等人，1997，1998 a，B）和SORCE/SIM（Harder等人，2000）的太阳光谱与MODTRAN 3.7证实了我们的发现，与值分别为-0.5%，+2%，-1.4%，为SOLSPEC-0.33%，-0.47%，-6.2%，SORCE/SIM。SCIAMACHY太阳光谱通道1至4的比较（-由不莱梅大学重新校准-）与MODTRAN 3.7在可见光谱范围内的一致性在-0.4%以内（415-585 nm），在370-415 nm内为-1.6%，325-370 nm波长间隔内为-5.7%，与其他传感器的结果一致。与Skupin等人（2002年）的研究结果一致，我们的研究强调，与所有其他可用的太阳辐照度测量相比，目前ESA SCIAMACHY 1级校准在所考虑的波长间隔内系统性地大15%。
Abstract. Within the framework of the ENVISAT/-SCIAMACHY satellite validation, solar irradiance spectra are absolutely measured at moderate resolution in the UV/visible spectral range (in the UV from 316.7-418 nm and the visible from 400-652 nm at a full width half maximum resolution of 0.55 nm and 1.48 nm, respectively) from aboard the azimuth-controlled LPMA/DOAS balloon gondola at around 32 km balloon float altitude. After accounting for the atmospheric extinction due to Rayleigh scattering and gaseous absorption (O3 and NO2), the measured solar spectra are compared with previous observations. Our solar irradiance spectrum perfectly agrees within +0.03% with the re-calibrated Kurucz et al. (1984) solar spectrum (Fontenla et al., 1999, called MODTRAN 3.7) in the visible spectral range (415-650 nm), but it is +2.1% larger in the (370-415 nm) wavelength interval, and -4% smaller in the UV-A spectral range (316.7-370 nm), when the Kurucz spectrum is convolved to the spectral resolution of our instrument. Similar comparisons of the SOLSPEC (Thuillier et al., 1997, 1998a, b) and SORCE/SIM (Harder et al., 2000) solar spectra with MODTRAN 3.7 confirms our findings with the values being -0.5%, +2%, and -1.4% for SOLSPEC -0.33%, -0.47%, and -6.2% for SORCE/SIM, respectively. Comparison of the SCIAMACHY solar spectrum from channels 1 to 4 (- re-calibrated by the University of Bremen -) with MODTRAN 3.7 indicates an agreement within -0.4% in the visible spectral range (415-585 nm), -1.6% within the 370-415 nm, and -5.7% within 325-370 nm wavelength interval, in agreement with the results of the other sensors. In agreement with findings of Skupin et al. (2002) our study emphasizes that the present ESA SCIAMACHY level 1 calibration is systematically +15% larger in the considered wavelength intervals when compared to all available other solar irradiance measurements.