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Sea surface temperature anomalies in different ocean basins affecting the interannual variations of summer precipitation in low-latitude highlands of Southeast Asia

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Abstract

This study investigates the effects of sea surface temperature (SST) anomalies in different ocean basins driving the interannual variations of summer precipitation in low-latitude highlands of Southeast Asia (SALH) during 1981–2020. Singular value decomposition reveals that above-normal SALH precipitation is dynamically connected with positive SST anomalies over the tropical Indian Ocean (TIO) and over the tropical South Atlantic (TSA) and negative SST anomaly over the eastern North Pacific (ENP). The atmospheric circulation related to the TIO SST anomaly that facilitates enhanced SALH precipitation is characterized by the positive phase of Pacific-Japan pattern around East Asia. Those associated with the TSA and ENP SST anomalies are featured by the zonally overturning circulation across the tropical regions and a circumglobal teleconnection-like wave train, respectively. All of these could strengthen the western Pacific subtropical high and the climatological water vapor transport toward SALH. Furthermore, these SST anomalies can persist from preceding several months to summer and may provide the predictability for the interannual variations of the SALH summer precipitation.

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Data availability

The CHIRPS precipitation data was downloaded from [https://data.chc.ucsb.edu/products/CHIRPS-2.0/]. The APHRODITE precipitation data was downloaded from [http://aphrodite.st.hirosaki-u.ac.jp/products.html]. The HadISST1 data was downloaded from [https://www.metoffice.gov.uk/hadobs/hadisst/data/download.html]. The ERA5 dataset was downloaded from [https://cds.climate.copernicus.eu/]. The OLR dataset was downloaded from [https://psl.noaa.gov/thredds/catalog/Datasets/interp_OLR/catalog.html]. The ETOPO5 topographic data was downloaded from [https://www.ngdc.noaa.gov/mgg/global/relief/ETOPO5/TOPO/ETOPO5/].

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Acknowledgements

We thank the editor and three anonymous reviewers for their valuable comments and suggestions to improve the manuscript. This work was supported by the National Natural Science Foundation of China (42030603, 42205061 and 42022035), the Natural Science Foundation of Yunnan Province (202302AN360006 and 202301AV070001), and the Postdoctoral Science Foundation of Yunnan Province (C615300504039).

Funding

This work was supported by the National Natural Science Foundation of China (42030603, 42205061 and 42022035), the Natural Science Foundation of Yunnan Province (202302AN360006 and 202301AV070001), and the Postdoctoral Science Foundation of Yunnan Province (C615300504039).

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All authors contributed to the study conception and the final manuscript. ZD, RY, and JC designed the study. ZD, LW, and GY performed the investigation and analysis. ZD and JC wrote the manuscript draft.

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Correspondence to Ruowen Yang or Jie Cao.

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Dong, Z., Yang, R., Cao, J. et al. Sea surface temperature anomalies in different ocean basins affecting the interannual variations of summer precipitation in low-latitude highlands of Southeast Asia. Clim Dyn 61, 5517–5531 (2023). https://doi.org/10.1007/s00382-023-06868-7

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  • DOI: https://doi.org/10.1007/s00382-023-06868-7

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