Abstract
This study investigated the spatiotemporal variation of diabatic heating in the Southeast Asian low-latitude highlands (SEALLH) using JRA-55 reanalysis data. Throughout the year, the column-integrated radiative heating (CIRH) is negative, the column-integrated sensible heating (CISH) is positive, and the column-integrated latent heating (CILH) is positive over the SEALLH. The near-surface sensible heating and the rainy-season latent heating in the lower-middle troposphere are the dominant components of diabatic heating. The SEALLH is a heat source from April to September but is a heat sink from November to February. The SEALLH is warmer and wetter than the TP, and the intensity of latent heating and diabatic heating over the SEALLH are greater than their counterpart in the TP, especially in boreal summer. The annual cycles of the CISH, CIRH, and CILH over the SEALLH are phase shifted by around 1 month.
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Data availability
JRA-55 diabatic heating datasets are available from https://rda.ucar.edu/datasets/ds628.1/index.html#!sfol-fw?g=47. GTOPO30 data are available from https://lta.cr.usgs.gov/GTOPO30.
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Funding
This work was supported by the National Natural Science Foundation of China (42030603, and 42275031) and the program for Yunnan innovative team for climate change over Greater Mekong Subregion (2019HC027).
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All authors contributed equally to this work. Jie Cao contributed to the study conception. Data collection and figures preparation were performed by Yu Yang. The first draft of the manuscript was written by Yu Yang, Yali Yang, and Jie Cao. All authors read and approved the final manuscript.
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Yang, Y., Yang, Y. & Cao, J. Seasonal variability of diabatic heating in the Southeast Asian low-latitude highlands. Theor Appl Climatol 152, 1311–1323 (2023). https://doi.org/10.1007/s00704-023-04460-x
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DOI: https://doi.org/10.1007/s00704-023-04460-x