Preprints
https://doi.org/10.5194/acp-2022-451
https://doi.org/10.5194/acp-2022-451
 
27 Jun 2022
27 Jun 2022
Status: a revised version of this preprint was accepted for the journal ACP and is expected to appear here in due course.

An assessment of land energy balance over East Asia from multiple lines and the roles of Tibet Plateau, aerosols, and clouds

Qiuyan Wang1,2,6, Hua Zhang1,2, Su Yang3, Qi Chen2, Xixun Zhou2, Bing Xie4, Yuying Wang1, Guangyu Shi1,5, and Martin Wild6 Qiuyan Wang et al.
  • 1Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, China
  • 2State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China
  • 3National Meteorological Information Center, China Meteorological Administration, Beijing 100081, China
  • 4Laboratory for Climate Studies of China Meteorological Administration, National Climate Center, Beijing 100081, China
  • 5State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
  • 6Institute for Atmospheric and Climate Science, ETH Zurich, 8092 Zurich, Switzerland

Abstract. With high emissions of aerosols and the known world’s “Third Pole” of the Tibet Plateau (TP) in East Asia, knowledge on the energy budget over this region is widely concerned. This study first attempts to estimate the present-day land energy balance over East Asia by combining surface and satellite observations, as well as the atmospheric reanalysis and Coupled Model Intercomparison Project phase 6 (CMIP6) simulations. Compared to the global land budget, a substantially larger fraction of atmospheric shortwave radiation of 5.2 % is reflected, highly associated with the higher aerosol loadings and more clouds over East Asian land. While a slightly smaller fraction of atmospheric shortwave absorption of 0.6 % is unexpectedly estimated, possibly related to the lower water vapor content effects due to the thinner air over the TP to overcompensate for the aerosol and cloud effects over East Asian land. The weaker greenhouse effect and fewer low clouds due to the TP are very likely the causes for the smaller fraction of East Asian-land surface downward longwave radiation. Hence, high aerosol loadings, clouds, and the TP over East Asia play vital roles in the shortwave budgets, while the TP is responsible for the longwave budgets during this regional energy budget assessment. The further obtained cloud radiative effects suggest that the presence of clouds results in a larger cooling effect on the climate system over East Asian land than that over globe. This study helps understand the potential factors influencing the diversifying energy budget assessments over regions.

Qiuyan Wang et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on acp-2022-451', Husi Letu, 08 Jul 2022
  • RC1: 'Comment on acp-2022-451', Anonymous Referee #1, 08 Jul 2022
  • RC2: 'Comment on acp-2022-451', Anonymous Referee #2, 11 Jul 2022

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on acp-2022-451', Husi Letu, 08 Jul 2022
  • RC1: 'Comment on acp-2022-451', Anonymous Referee #1, 08 Jul 2022
  • RC2: 'Comment on acp-2022-451', Anonymous Referee #2, 11 Jul 2022

Qiuyan Wang et al.

Qiuyan Wang et al.

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Short summary
The present-day land energy balance over East Asia is estimated for the first time. Results indicate that high aerosol loadings, clouds, and the Tibet Plateau (TP) over East Asia play vital roles in the shortwave budgets, while the TP is responsible for the longwave budgets during this regional energy budget assessment. This study provides a perspective to understand fully how the potential factors influence the diversifying regional energy budget assessments.
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