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Estimation of ERA5 shortwave radiation budget in the northern South China Sea in summer based on navigation observation data
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Zhen Zhang1, Gong Zhang1, 2, Changwei Liu1, 2, Renhao Wu1, 2, Murong Qi1, Hanyu Deng1, Jianqiao Chen1, Bo Han1, 2, *
Haiyang Xuebao | 2023, 45(2) : 51 - 61
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Haiyang Xuebao | 2023, 45(2): 51-61
• Article •
Estimation of ERA5 shortwave radiation budget in the northern South China Sea in summer based on navigation observation data
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Zhen Zhang1, Gong Zhang1, 2, Changwei Liu1, 2, Renhao Wu1, 2, Murong Qi1, Hanyu Deng1, Jianqiao Chen1, Bo Han1, 2, *
Affiliations
  • 1Key Laboratory of Tropical Atmospheric and Marine System Science, Ministry of Education, School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai 519082, China
  • 2Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China
Published: 2023-02-01 doi: 10.12284/hyxb2023029
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The short wave radiation budget on the sea surface is an important physical process of energy exchange at the sea-air interface. In this study, the sea surface short wave radiation flux budget of ERA5 reanalysis data is evaluated by using the observed data of summer scientific research voyages in the northern South China Sea in 2019. The results show that the downward short wave radiation of ERA5 is smaller than the observed data, and the deviation is the largest at 11:00 and 15:00 (Beijing time), up to −100 W/m2. At the same time, the sea surface albedo of ERA5 is generally lower than observed. The bias in ERA5 is small under a high solar altitude angle, being about −0.03, but can reach −0.15 under a low solar altitude. The bias in the downward shortwave radiation and sea surface albedo jointly caused an underestimation of 25.4 W/m2 in the daytime average sea surface net shortwave radiation flux in ERA5. In particular, the albedo underestimation offsets about 50% of the contribution of downward shortwave radiation bias. The results show that ERA5 has different manifestations of sea surface radiation budget deviation under different atmospheric transmittance conditions. We also found that the underestimation of sea surface albedo in ERA5 is caused by its parameterization schemes and put an optimization based on our observation.

sea surface albedo  /  downward shortwave radiation flux  /  transmissivity  /  solar altitude angle
Zhen Zhang, Gong Zhang, Changwei Liu, Renhao Wu, Murong Qi, Hanyu Deng, Jianqiao Chen, Bo Han. Estimation of ERA5 shortwave radiation budget in the northern South China Sea in summer based on navigation observation data[J]. Haiyang Xuebao, 2023 , 45 (2) : 51 -61 . DOI: 10.12284/hyxb2023029
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Year 2023 volume 45 Issue 2
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Article Info
doi: 10.12284/hyxb2023029
  • Receive Date：2022-01-05
  • Online Date：2025-12-26
  • Published：2023-02-01
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  • Received：2022-01-05
  • Revised：2022-05-23
Funding
Affiliations
    1Key Laboratory of Tropical Atmospheric and Marine System Science, Ministry of Education, School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai 519082, China
    2Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China
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光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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