Validation of MIPAS, and SCIAMACHY data by ground-based spectroscopy at Kiruna, Sweden, and Izaña, Tenerife Island (AOID-191)
Validation of MIPAS, and SCIAMACHY data by ground-based spectroscopy at Kiruna, Sweden, and Izaña, Tenerife Island (AOID-191)
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通过瑞典基律纳和特内里费岛伊萨尼亚的地面光谱验证 MIPAS 和 SCIAMACHY 数据 (AOID-191)
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发表时间：
2003
期刊：
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通讯作者：
G. Schwarz
中科院分区：
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作者：
T. Blumenstock;S. Mikuteit;A. Griesfeller;F. Hase;G. Kopp;I. Kramer;M. Schneider;H. Fischer;M. Gil;J. R. Moreta;M. N. Coma;U. Raffalski;E. Cuevas;B. Dix;G. Schwarz
在这个环境卫星验证项目[AO-191]范围内，在北极的基律纳和亚热带的特内里费岛进行了不同技术的地面测量。这些地面数据被用来验证来自SCIAMACHY的柱量以及来自MIPAS的剖面。虽然SCIAMACHY O3柱的3.53版本与地面DOAS和FTIR测量值有很大差异，但最近的4.0数据的一致性是相当合理的。此外，用4.0版软件获得的SCIAMACHY NO2柱量与地基DOAS（上午）相当吻合。和特内里费岛的红外光谱结果而SCIAMACHY NO2 3.53版数据与来自基律纳的地基DOAS和FTIR数据相比显示出一些偏移。2002年11月13日之前测量的MIPAS O3剖面显示高度分配误差约为1.5 km，这与其他验证研究一致。这导致MIPAS O3分布在低海拔处大约0.8 ppmv过大，在约30 km的海拔处大约0.8 ppmv过低。考虑到高度变化或使用MIPAS剖面与压力的关系，一致性要好得多。MIPAS O3配置文件相比，地基FTIR的平均差异小于0.4 ppmv。与FTIR相比，MIPAS HNO 3浓度梯度作为海拔高度的函数降低，导致最大值更宽。MIPAS N2 O剖面在大约18公里以上的高度很好地吻合，但对于较低的高度来说太大了。MIPAS CH 4廓线显示出一定的振荡，与地面廓线相比，MIPAS CH 4廓线的梯度不同。
Within this ENVISAT validation project [AO-191] ground-based measurements of different techniques have been performed at Kiruna in the Arctic and on Tenerife Island in the subtropics. These ground-based data were used to validate column amounts derived from SCIAMACHY as well as profiles from MIPAS. While SCIAMACHY O3 columns of versions up to 3.53 differ significantly from ground-based DOAS and FTIR measurements, the agreement of more recent 4.0 data is quite reasonable. Also SCIAMACHY NO2 column amounts obtained with software version 4.0 agree quite nicely with ground-based DOAS (a.m.) and FTIR results from Tenerife Island. While SCIAMACHY NO2 version 3.53 data compared with ground-based DOAS and FTIR data from Kiruna show some offset. MIPAS O3 profiles measured before November 13, 2002 show an error in altitude assignment of about 1.5 km, which is consistent with other validation studies. This results in a MIPAS O3 profile which is about 0.8 ppmv too large at low altitudes and about 0.8 ppmv too low at altitudes around 30 km. Considering the altitude shift or using MIPAS profiles versus pressure the agreement is much better. The mean differences of MIPAS O3 profiles compared to ground-based FTIR are less than 0.4 ppmv. MIPAS HNO3 concentration gradients as a function of altitude are reduced compared to FTIR, resulting in a maximum which is broader. MIPAS N2O profiles agree nicely above about 18 km, but are too large for lower altitudes. The MIPAS CH4 profile show some oscillations and the gradient of the MIPAS CH4 profiles is different as compared to the ground-based profiles.