The lack of aerosol type information has largely hindered satellite products from further applications such as constraining model simulations and quantifying aerosol climate effects. The recent Version (V) 23 Multi‐angle Imaging Spectroradiometer (MISR) aerosol products with an enhanced spatial resolution at 4.4 km enable an unprecedented chance to explore aerosol types and associated processes in the regional scale. Here we provide a comprehensive insight into the characterization of MISR aerosol optical and microphysical properties, as well as their performance, over East Asia. Ground validation shows a remarkable improvement in the accuracy of V23 MISR aerosol optical depth (AOD) with ~80% of its retrieval bias within ±(0.05 + 20%AOD_AERONET). However, an underestimation of MISR AOD is still prevalent in the high‐AOD (>0.6) conditions, due to the surface‐atmosphere separation problem and insufficient absorbing aerosol mixtures being selected. MISR AOD of different size bins agrees well with AErosol RObotic NETwork (AERONET) results, demonstrating an evident advantage in discriminating natural dust from anthropogenic particles. Although MISR nonspherical and absorbing retrievals display a consistent variation with the AERONET inversions, their component AODs have a poor reliability over East Asia due to the inappropriate aerosol component models or their mixtures as in V22. In particular, the most striking problem is the sparse and discrete MISR absorbing retrievals with spatial discontinuity. Generally, the high‐resolution V23 MISR products exhibit a great potential in characterizing the regional variations of aerosol type, which can be further refined by considering the prior aerosol knowledge over East Asia.

中文翻译：

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通过4.4 km MISR产品对东亚地区气溶胶类型进行表征：初步见解和总体性能

气溶胶类型信息的缺乏极大地阻碍了卫星产品的进一步应用，例如约束模型模拟和量化气溶胶气候影响。最新的（V）23型多角度成像光谱仪（MISR）气溶胶产品在4.4 km处具有更高的空间分辨率，为探索区域规模的气溶胶类型和相关过程提供了前所未有的机会。在这里，我们对MISR气溶胶的光学和微物理特性及其在东亚地区的性能提供了全面的了解。地面验证显示V23 MISR气溶胶光学深度（AOD）的精度有了显着提高，其恢复偏差的80％在±（0.05 + 20％AOD _{AERONET）之内}）。然而，由于表面-大气分离问题和选择的吸收气溶胶混合物不足，在高AOD（> 0.6）条件下仍普遍低估了MISR AOD。不同尺寸的垃圾箱的MISR AOD与AErosol机器人网络（AERONET）结果非常吻合，证明了从人为颗粒中区分自然粉尘的明显优势。尽管MISR非球面和吸收式反演与AERONET反演显示出一致的变化，但由于不适当的气溶胶成分模型或其混合物（如V22），其成分AOD在东亚地区的可靠性较差。特别是，最突出的问题是具有空间不连续性的稀疏和离散MISR吸收检索。通常，