How accurate are satellite-derived surface solar radiation products over tropical oceans?

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  • 1 National Tibetan Plateau Data Center, Key Laboratory of Tibetan Environmental Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China.
  • 2 Department of Earth System Science, Tsinghua University, Beijing 100084, China.
  • 3 CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing 100101, China.
  • 4 University of Chinese Academy of Sciences, Beijing 100049, China.
  • 5 Shaoxing Meteorological Bureau, Zhejiang, Shaoxing, 312000.
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Abstract

Surface solar radiation (SSR) over the ocean is essential for studies of ocean-atmosphere interactions and marine ecology, and satellite remote sensing is a major way to obtain the SSR over ocean. A new high-resolution (10 km, 3 hour) SSR product has recently been developed, mainly based on the newly released cloud product of the International Satellite Cloud Climatology Project H-series (ISCCP-HXG), and is available for the period from 1983.7 to 2017.6. In this study, we compared this SSR product with in-situ observations from 70 buoy sites in the Global Tropical Moored Buoy Array (GTMBA), and also compared it with another well-known satellite-derived SSR product from the Clouds and the Earth’s Radiant Energy System (CERES, edition 4.1), which has a spatial resolution of approximately 100 km. The results show that the ISCCP-HXG SSR product is generally more accurate than the CERES SSR product for both ocean and land surfaces. We also found that the accuracy of both satellite-derived SSR products (ISCCP-HXG and CRERS) was higher over ocean than over land, and that the accuracy of ISCCP-HXG SSR improves significantly when the spatial resolution of the product is coarsened to >= 30 km.

Corresponding author address: Wenjun Tang, Dr., Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Building 3, Courtyard 16, Lin Cui Road, Chaoyang District, Beijing 100101, China, Email: tangwj@itpcas.ac.cn, Tel: +86-10-84097046, Fax: +86-10-84097079

Abstract

Surface solar radiation (SSR) over the ocean is essential for studies of ocean-atmosphere interactions and marine ecology, and satellite remote sensing is a major way to obtain the SSR over ocean. A new high-resolution (10 km, 3 hour) SSR product has recently been developed, mainly based on the newly released cloud product of the International Satellite Cloud Climatology Project H-series (ISCCP-HXG), and is available for the period from 1983.7 to 2017.6. In this study, we compared this SSR product with in-situ observations from 70 buoy sites in the Global Tropical Moored Buoy Array (GTMBA), and also compared it with another well-known satellite-derived SSR product from the Clouds and the Earth’s Radiant Energy System (CERES, edition 4.1), which has a spatial resolution of approximately 100 km. The results show that the ISCCP-HXG SSR product is generally more accurate than the CERES SSR product for both ocean and land surfaces. We also found that the accuracy of both satellite-derived SSR products (ISCCP-HXG and CRERS) was higher over ocean than over land, and that the accuracy of ISCCP-HXG SSR improves significantly when the spatial resolution of the product is coarsened to >= 30 km.

Corresponding author address: Wenjun Tang, Dr., Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Building 3, Courtyard 16, Lin Cui Road, Chaoyang District, Beijing 100101, China, Email: tangwj@itpcas.ac.cn, Tel: +86-10-84097046, Fax: +86-10-84097079
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