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First retrieval of tropospheric aerosol profiles using MAX-DOAS and comparison with lidar and sky radiometer measurements

机译:首次使用MAX-DOAS检索对流层气溶胶剖面,并与激光雷达和天空辐射计测量结果进行比较

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Ground-based Multi-Axis Differential Optical Absorption Spectroscopy(MAX-DOAS) measurements were performed at Tsukuba, Japan (36.1° N,140.1° E), in November–December 2006. By analyzing the measured spectraof scattered sunlight with DOAS and optimal estimation methods, we firstretrieve the aerosol optical depth (τ) and the vertical profile of theaerosol extinction coefficient (k) at 476 nm in the lower troposphere. Theseretrieved quantities are characterized through comparisons with coincidentlidar and sky radiometer measurements. The retrieved k values for layers of0–1 and 1–2 km agree with lidar data to within 30% and 60%,respectively, for most cases, including partly cloudy conditions. Resultssimilar to k at 0–1 km are obtained for the retrieved τ values,demonstrating that MAX-DOAS provides a new, unique aerosol dataset in thelower troposphere.
机译:于2006年11月至12月在日本筑波(北纬36.1°,东经140.1°E)进行了地面多轴差分光吸收光谱法(MAX-DOAS)的测量。方法,我们首先获取低层对流层中476 nm处的气溶胶光学深度(τ)和气溶胶消光系数( k )的垂直分布。通过与同步激光雷达和天空辐射计测量值的比较来表征这些回收的量。在大多数情况下(包括部分多云的条件下),对于0–1和1–2 km的图层检索到的 k 值分别与激光雷达数据相吻合,误差在30%和60%之内。对于检索到的τ值,获得了与 k 相似的结果,表明MAX-DOAS在对流层低层提供了一个新的,独特的气溶胶数据集。

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