A comparative study of three SST reanalysis products and buoys data over the China offshore area

Wang Chenqi; Li Xiang; Zhang Yunfei; Zu Ziqing; Zhang Runyu

doi:10.3969/j.issn.0253-4193.2020.03.011

Volume 42 Issue 3

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Wang Chenqi，Li Xiang，Zhang Yunfei, et al. A comparative study of three SST reanalysis products and buoys data over the China offshore area[J]. Haiyang Xuebao，2020, 42(3)：118–128，doi:10.3969/j.issn.0253−4193.2020.03.011

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A comparative study of three SST reanalysis products and buoys data over the China offshore area

doi: 10.3969/j.issn.0253-4193.2020.03.011

1.
Key Laboratory of Marine Hazards Forecasting, Ministry of Natural Resources, National Marine Environmental Forecasting Center, Beijing 100081, China
2.
National Marine Environmental Forecasting Center, Beijing 100081, China

Received Date: 2019-01-31
Rev Recd Date: 2019-07-24

Available Online: 2020-11-18

Publish Date: 2020-03-25

Abstract

Abstract

Based on the buoys data over the China offshore area during July 1, 2018 to August 6, 2018 collected by the Ministry of Natural Resources, three SST reanalysis products (OISST, OSTIA SST, RTG SST) were validated and compared through analyzing the mean bias, root mean square error (RMSE), correlation coefficient and standard deviation bias. The comparison results show that in the whole time, three SST reanalysis products we used are comparable to the buoys data. The mean bias and correlation coefficient between OSTIA SST dataset and buoy SST data is 0.12℃ and 0.94, better than OISST dataset (−0.85℃, 0.90) and RTG SST dataset (−0.17℃, 0.86). Compared with 80% buoys, the reliability of OSTIA SST dataset is higher than OISST dataset and RTG SST dataset significantly. During typhoon transit periods, absolute values of mean bias and RMSE (correlation coefficient) between OSTIA SST dataset and buoy SST data are smaller (larger) than RTG SST dataset and OISST dataset, which means that OSTIA SST dataset can capture the basic characteristics of SST over the China offshore area more accurately in severe sea conditions.
- China offshore area,
- buoy data,
- SST reanalysis products

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References

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