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首页> 外文期刊>Journal of Geophysical Research, D. Atmospheres: JGR >A Simple and Universal Aerosol Retrieval Algorithm for Landsat Series Images Over Complex Surfaces
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A Simple and Universal Aerosol Retrieval Algorithm for Landsat Series Images Over Complex Surfaces

机译：复杂曲面上Landsat系列图像的简单和通用气溶胶检索算法

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摘要

Operational aerosol optical depth (AOD) products are available at coarse spatial resolutions from several to tens of kilometers. These resolutions limit the application of these products for monitoring atmospheric pollutants at the city level. Therefore, a simple, universal, and high-resolution (30 m) Landsat aerosol retrieval algorithm over complex urban surfaces is developed. The surface reflectance is estimated from a combination of top of atmosphere reflectance at short-wave infrared (2.22 μm) and Landsat 4–7 surface reflectance climate data records over densely vegetated areas and bright areas. The aerosol type is determined using the historical aerosol optical properties derived from the local urban Aerosol Robotic Network (AERONET) site (Beijing). AERONET ground-based sun photometer AOD measurements from five sites located in urban and rural areas are obtained to validate the AOD retrievals. Terra MODerate resolution Imaging Spectrometer Collection (C) 6 AOD products (MOD04) including the dark target (DT), the deep blue (DB), and the combined DT and DB (DT&DB) retrievals at 10 km spatial resolution are obtained for comparison purposes. Validation results show that the Landsat AOD retrievals at a 30 m resolution are well correlated with the AERONET AOD measurements (R~2 = 0.932) and that approximately 77.46% of the retrievals fall within the expected error with a low mean absolute error of 0.090 and a root-mean-square error of 0.126. Comparison results show that Landsat AOD retrievals are overall better and less biased than MOD04 AOD products, indicating that the new algorithm is robust and performs well in AOD retrieval over complex surfaces. The new algorithm can provide continuous and detailed spatial distributions of AOD during both low and high aerosol loadings.
机译：操作气溶胶光学深度（AOD）产品可在粗糙的空间分辨率下获得，从几到几十公里处获得。这些决议限制了这些产品在市级监测大气污染物的应用。因此，开发了一种简单，通用和高分辨率（30米）的Landsat气溶胶检索算法。从短波红外（2.22μm）的大气反射率顶部的组合估计表面反射率，并且Landsat 4-7表面反射率气候数据记录在密集的植被区域和明亮的区域。气溶胶类型使用来自当地城市气溶胶机器人网络（AERONET）网站（北京）的历史气溶胶光学特性确定。获得城市和农村地区五个站点的Aeronet地面阳光光度计Aod测量，以验证AOD检索。 Terra适度分辨率成像光谱仪收集（c）6 AOD产品（MOD04）包括暗目标（DT），深蓝色（DB）和组合的DT和DB（DT＆DB）以比较目的，获得了10公里的空间分辨率。验证结果表明，30米分辨率的LANDSAT AOD检索与AERONET AOD测量（R〜2 = 0.932）有很好的关联，并且约77.46％的检索落在预期误差内，其低于0.090和0.090的绝对误差根均方误差为0.126。比较结果表明，LANDSAT AOD检索总体而言比MOD04 AOD产品更好，更少偏置，表明新算法在复杂表面上的AOD检索中良好。新算法在低气溶胶载荷和高气溶胶载荷期间，可以提供AOD的连续和详细的空间分布。

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  • 作者

    Jing Wei; Bo Huang; Lin Sun; Zhaoyang Zhang; Lunche Wang; Muhammad Bilal;

  • 作者单位

    Institute of Space and Earth Information Science The Chinese University of Hong Kong Hong Kong;

    Institute of Space and Earth Information Science The Chinese University of Hong Kong Hong Kong;

    College of Geomatics Shandong University of Science and Technology Qingdao China;

    College of Geography and Environmental Sciences Zhejiang Normal University Jinhua China;

    Laboratory of Critical Zone Evolution School of Earth Sciences China University of Geosciences Wuhan China;

    School of Marine Sciences Nanjing University of Information Science and Technology Nanjing China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地球物理学;
  • 关键词

    A Simple; Universal Aerosol; Complex Surfaces;

    机译：一个简单的;万能气溶胶;复杂表面;

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