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Recent recovery of the boreal spring sensible heating over the Tibetan Plateau will continue in CMIP6 future projections

Journal article
Authors Meirong Wang
Jun Wang
Deliang Chen
Anmin Duan
Yimin Liu
Shunwu Zhou
Dong Guo
Hengmao Wang
Weimin Ju
Published in Environmental Research Letters
Volume 14
Issue 12
Pages 1-9
ISSN 1748-9326
Publication year 2019
Published at Department of Earth Sciences
Pages 1-9
Language en
Links https://doi.org/10.1088/1748-9326/a...
https://iopscience.iop.org/article/...
Subject categories Earth and Related Environmental Sciences

Abstract

The spring sensible heating (SH) over the Tibetan Plateau (TP) serves as a huge 'air pump', significantly influencing the Asian summer monsoon, has experienced a decreasing trend. However, it remains unclear whether this decline will continue. Therefore, we here examine the long-term trends of spring SH over the central and eastern TP (CETP) based on a meteorological station-based calculated SH dataset, and CMIP6 multi-model simulations. These two sources confirmed the previous finding that the SH peaks in May. Further, we find that the declining SH was replaced by a fast recovery after approximate 2000 in the station-based SH. This is to some extent verified by the historical simulations of CMIP6 models. Importantly, CMIP6 future projections suggest that this increasing trend will continue, and get stronger with higher radiative forcing from SSP126 to SSP585. Mechanism analysis indicates that the previous decreasing trend in SH was mainly caused by the decline of 10 m wind speed, while the recent and future increasing trend results from the rising ground-air temperature difference. We suggest that this increasing trend of spring SH over the CETP may serve as an alternative driver for the enhancement of the East Asian summer monsoon in the future.

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