Airborne and satellite remote sensing of the mid-infrared water vapour continuum.
Airborne and satellite remote sensing of the mid-infrared water vapour continuum.
复制标题
中红外水蒸气连续谱的机载和卫星遥感。
DOI：
10.1098/rsta.2011.0223
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Newman SM
中科院分区：
文献类型：
--
作者：
Newman SM
从空间遥感大气在天气预报中发挥着越来越重要的作用。利用最新一代气象卫星的观测结果依赖于对基本光谱学的准确了解，包括对水蒸气连续吸收的了解。利用航空大气测量设施研究飞机进行的实地活动收集了一个全面的数据集，其中包括遥感红外辐射观测数据，并附有对大气温度和湿度结构的精确测量。这些实地测量已被用来验证与最新的实验室测量相比，红外水汽连续的强度。最近在广泛使用的MT_CKD（Mlawer-Tobin-Clough-Kneizys-Davies）模型中，在2400和3200 cm− 1之间的自连续系数的重大变化被证明是适当的，并与现场测量结果一致。在1300-2000 cm− 1波段的外来连续谱的结果表明，温度依赖性很弱，目前还没有包括在大气模型中。一维变分反演实验表明，使用新的实验室推导的连续系数湿度反演的一个小的积极的好处。
Remote sensing of the atmosphere from space plays an increasingly important role in weather forecasting. Exploiting observations from the latest generation of weather satellites relies on an accurate knowledge of fundamental spectroscopy, including the water vapour continuum absorption. Field campaigns involving the Facility for Airborne Atmospheric Measurements research aircraft have collected a comprehensive dataset, comprising remotely sensed infrared radiance observations collocated with accurate measurements of the temperature and humidity structure of the atmosphere. These field measurements have been used to validate the strength of the infrared water vapour continuum in comparison with the latest laboratory measurements. The recent substantial changes to self-continuum coefficients in the widely used MT_CKD (Mlawer–Tobin–Clough–Kneizys–Davies) model between 2400 and 3200 cm−1are shown to be appropriate and in agreement with field measurements. Results for the foreign continuum in the 1300–2000 cm−1band suggest a weak temperature dependence that is not currently included in atmospheric models. A one-dimensional variational retrieval experiment is performed that shows a small positive benefit from using new laboratory-derived continuum coefficients for humidity retrievals.