Corrections of shipboard GPS radiosonde soundings and applications on historical records in the eastern tropical Indian Ocean and South China Sea

Zewen Wu; Xin Liu; Yunkai He; Haoyu Jiang; Bo Peng; Ke Huang

doi:10.1007/s13131-024-2361-4

Volume 43 Issue 9

Sep. 2024

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Zewen Wu, Xin Liu, Yunkai He, Haoyu Jiang, Bo Peng, Ke Huang. Corrections of shipboard GPS radiosonde soundings and applications on historical records in the eastern tropical Indian Ocean and South China Sea[J]. Acta Oceanologica Sinica, 2024, 43(9): 54-69. doi: 10.1007/s13131-024-2361-4

Citation:

Zewen Wu, Xin Liu, Yunkai He, Haoyu Jiang, Bo Peng, Ke Huang. Corrections of shipboard GPS radiosonde soundings and applications on historical records in the eastern tropical Indian Ocean and South China Sea[J]. Acta Oceanologica Sinica, 2024, 43(9): 54-69. doi: 10.1007/s13131-024-2361-4

Citation:

Zewen Wu, Xin Liu, Yunkai He, Haoyu Jiang, Bo Peng, Ke Huang. Corrections of shipboard GPS radiosonde soundings and applications on historical records in the eastern tropical Indian Ocean and South China Sea[J]. Acta Oceanologica Sinica, 2024, 43(9): 54-69. doi: 10.1007/s13131-024-2361-4

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Corrections of shipboard GPS radiosonde soundings and applications on historical records in the eastern tropical Indian Ocean and South China Sea

doi: 10.1007/s13131-024-2361-4

Zewen Wu^{1, 2
,},
Xin Liu^{1, 3},
Yunkai He¹,
Haoyu Jiang²,
Bo Peng^{4
,
,},
Ke Huang^{1, 5
,
,}

1.
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
2.
Hubei Key Laboratory of Marine Geological Resources, China University of Geosciences, Wuhan 430074, China
3.
Guangzhou Cigarette Factory of China Tobacco Guangdong Industrial Co., Ltd., Guangzhou 510385, China
4.
Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China
5.
Fujian Provincial Key Laboratory of Marine Physical and Geological Processes, Xiamen 361000, China

Funds: The Second Tibetan Plateau Scientific Expedition and Research Program under contract No. 2019QZKK0102-02; the National Natural Science Foundation of China under contract Nos 42230402, 92158204, 42176026, 42076201, 41049903, 41149908, 41249906, 41249907, and 41249910; the Guangdong Basic and Applied Basic Research Foundation under contract No. 2022A1515240069; the Marine Economic Development Special Program of Guangdong Province (Six Major Marine Industries): Research and Demonstration of Critical Technologies for Comprehensive Prevention and Control of Natural Disaster in Offshore Wind Farms, China under contract No. 29[2023]; the Fund of Fujian Provincial Key Laboratory of Marine Physical and Geological Processes under contract No. KLMPG-22-02.

More Information

Corresponding author: E-mail: pengbo@jnu.edu.cn; kehuang@scsio.ac.cn
Received Date: 2024-04-19
Accepted Date: 2024-06-17

Available Online: 2024-09-10

Publish Date: 2024-09-01

Abstract

Abstract

Shipboard radiosonde soundings are important for detecting and quantifying the multiscale variability of atmosphere-ocean interactions associated with mass exchanges. This study evaluated the accuracies of shipboard Global Positioning System (GPS) soundings in the eastern tropical Indian Ocean and South China Sea through a simultaneous balloon-borne inter-comparison of different radiosonde types. Our results indicate that the temperature and relative humidity (RH) measurements of GPS-TanKong (GPS-TK) radiosonde (used at most stations before 2012) have larger biases than those of ChangFeng-06-A (CF-06-A) radiosonde (widely used in current observation) when compared to reference data from Vaisala RS92-SGP radiosonde, with a warm bias of 5℃ and dry bias of 10% during daytimes, and a cooling bias of –0.8℃ and a moist bias of 6% during nighttime. These systematic biases are primarily attributed to the radiation effects and altitude deviation. An empirical correction algorithm was developed to retrieve the atmospheric temperature and RH profiles. The corrected profiles agree well with that of RS92-SGP, except for uncertainties of CF-06-A in the stratosphere. These correction algorithms were applied to the GPS-TK historical sounding records, reducing biases in the corrected temperature and RH profiles when compared to radio occultation data. The correction of GPS-TK historical records illustrated an improvement in capturing the marine atmospheric structure, with more accurate atmospheric boundary layer height, convective available potential energy, and convective inhibition in the tropical ocean. This study contributes significantly to improving the quality of GPS radiosonde soundings and promotes the sharing of observation in the eastern tropical Indian Ocean and South China Sea.
- shipboard GPS radiosonde soundings,
- corrections,
- temperature,
- relative humidity,
- eastern tropical Indian Ocean,
- South China Sea

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References(57)

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