Observations of Stratospheric Aerosol Using CPFM Polarized Limb Radiances
Observations of Stratospheric Aerosol Using CPFM Polarized Limb Radiances
复制标题
使用 CPFM 偏振临边辐射观测平流层气溶胶
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
E. Griffioen
中科院分区：
文献类型：
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作者：
C. McLinden;J. McConnell;C. T. McElroy;E. Griffioen
摘要 作者使用 CPFM（成分和光解离通量测量）偏振临边辐射测量与矢量辐射传输模型相结合来估计平流层气溶胶数密度、消光系数分布和尺寸分布。 CPFM 光谱辐射计安装在 NASA ER-2 高空研究飞机上。临边辐射度、天底辐射度和水平通量的垂直和水平偏振分量在 300–770 nm 波长范围内从当地地平线上方约 5°–10° 到下方 5°–10° 处测量。介绍了 1997 年 4 月和 5 月两次飞行的结果，作为夏季北极地区臭氧损失光化学活动的一部分。通过强制模型辐射率和偏振与测量结果相匹配来确定气溶胶特性。结果表明，20 公里处的数量密度约为 5-6 cm−3，有效半径为 0.17-0.20 μm。数量、表面积和体积密度比较有利...
Abstract The authors have used CPFM (composition and photodissociative flux measurement) polarized limb radiance measurements combined with a vector radiative transfer model to estimate stratospheric aerosol number density, extinction coefficient profiles, and size distribution. The CPFM spectroradiometer is flown on board the NASA ER-2 high-altitude research aircraft. The vertical and horizontal polarization components of limb radiance, nadir radiance, and horizontal flux are measured in the wavelength range 300–770 nm from approximately 5°–10° above to 5°–10° below the local horizon. Results from two flights during April and May 1997 as part of the Photochemistry of Ozone Loss in the Arctic Region in Summer campaign are presented. Aerosol characteristics are determined by forcing the model radiances and polarization to match the measurements. Results indicate number densities at 20 km are roughly 5–6 cm−3 with an effective radius of 0.17–0.20 μm. Number, surface area, and volume densities compare favora...