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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >A UARS STUDY OF LOWER STRATOSPHERIC POLAR PROCESSING IN THE EARLY STAGES OF NORTHERN AND SOUTHERN WINTERS
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A UARS STUDY OF LOWER STRATOSPHERIC POLAR PROCESSING IN THE EARLY STAGES OF NORTHERN AND SOUTHERN WINTERS

机译：北部和南部冬季早期下层平流层极地处理的研究

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UARS data and results from a three-dimensional transport model have been used to compare and contrast the extent of the early stages of chemical processing by polar stratospheric clouds (PSCs) during the 1991-1993 northern and southern hemisphere winters of the Upper Atmosphere Research Satellite (UARS) mission. The modeled location and timing of regions of polar processing agree quite well with the UARS microwave limb sounder (MLS), cryogenic limb array etalon spectrometer (CLAES) and Halogen Occultation Experiment (HALOE) observations in that enhanced ClO concentrations are generally found in sunlit regions of polar-processed air and decreases of ClONO2, and HNO3 accompany low temperatures and high values of the aerosol extinctions inside the vortex. For these winters it is found that there is a period of about 2 weeks during the northern hemisphere early winter where sporadic polar processing takes place. After this a persistent processing region is seen inside the polar vortex, and the vortex fills with polar-processed air in a bit more than 2 weeks from the first persistent PSC occurrence. In the southern hemisphere, polar processing also fills the vortex in a bit over 2 weeks. Estimates of the spectral aerosol measure of the aerosol spectrum from CLAES observations illustrate that PSC particles are seen where cold temperatures occur inside the polar vortex and heterogeneous conversion of chlorine species on PSCs are expected. [References: 40]
机译：UARS数据和三维传输模型的结果已用于比较和对比上层大气层研究卫星1991-1993年北半球和南半球冬季极地平流云（PSC）进行化学处理的早期阶段（UARS）任务。极地加工区域的模型化位置和时间与UARS微波肢体测深仪（MLS），低温肢体阵列标准具光谱仪（CLAES）和卤素掩星实验（HALOE）观测值非常吻合，因为通常在阳光照射的地区发现ClO浓度升高极性处理后的空气和ClONO2和HNO3的减少伴随着低温和漩涡内部气溶胶消光的高值。对于这些冬季，发现在北半球初冬期间大约有2周的时间，其中会发生零星的极地处理。此后，在极地涡旋中可以看到一个持续的处理区域，并且在第一次持续的PSC发生后的两周多的时间内，涡旋充满了经过极地处理的空气。在南半球，极地处理也将在两周内充满漩涡。从CLAES观测中估算的气溶胶光谱的气溶胶光谱测量值表明，在极涡内部发生低温的地方看到了PSC颗粒，并且预期在PSC上氯物种的异质转化。 [参考：40]

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