Projected response of East Asian summer monsoon system to future reductions in emissions of anthropogenic aerosols and their precursors

2015 ◽  
Vol 47 (5-6) ◽  
pp. 1455-1468 ◽  
Author(s):  
Zhili Wang ◽  
Hua Zhang ◽  
Xiaoye Zhang
Keyword(s):  
Summer Monsoon ◽  
East Asian Summer Monsoon ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
Anthropogenic Aerosols ◽  
Monsoon System ◽  
Asian Summer

scholarly journals Distinct effects of anthropogenic aerosols on the East Asian summer monsoon between multidecadal strong and weak monsoon stages

2016 ◽  
Vol 121 (12) ◽  
pp. 7026-7040 ◽  
Author(s):  
Xiaoning Xie ◽  
Hongli Wang ◽  
Xiaodong Liu ◽  
Jiandong Li ◽  
Zhaosheng Wang ◽  
...  
Keyword(s):  
Summer Monsoon ◽  
East Asian Summer Monsoon ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
Anthropogenic Aerosols ◽  
Asian Summer

scholarly journals Role of tropical cyclones over the western North Pacific in the East Asian summer monsoon system

2019 ◽  
Vol 3 (2) ◽  
pp. 147-156 ◽  
Author(s):  
Xian Chen ◽  
◽  
Zhong Zhong ◽  
YiJia Hu ◽  
Shi Zhong ◽  
...  
Keyword(s):  
Tropical Cyclones ◽  
Summer Monsoon ◽  
North Pacific ◽  
East Asian Summer Monsoon ◽  
Western North Pacific ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
Monsoon System ◽  
Asian Summer

The long-term variability of Changma in the East Asian summer monsoon system: A review and revisit

2017 ◽  
Vol 53 (2) ◽  
pp. 257-272 ◽  
Author(s):  
June-Yi Lee ◽  
MinHo Kwon ◽  
Kyung-Sook Yun ◽  
Seung-Ki Min ◽  
In-Hong Park ◽  
...  
Keyword(s):  
Summer Monsoon ◽  
East Asian Summer Monsoon ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
System A ◽  
Monsoon System ◽  
Asian Summer

scholarly journals East Asian summer monsoon enhanced by COVID-19

2021 ◽  
Author(s):  
Chao He ◽  
Wen Zhou ◽  
Tim Li ◽  
Tianjun Zhou ◽  
Yuhao Wang
Keyword(s):  
Summer Monsoon ◽  
East Asian Summer Monsoon ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
Fast Response ◽  
Forced Response ◽  
Anthropogenic Aerosols ◽  
Coupled Models ◽  
Asian Continent ◽  
Asian Summer

Abstract Anthropogenic emissions decreased dramatically during the COVID-19 pandemic, but its possible effect on monsoon is unclear. Based on coupled models participating in the COVID Model Intercomparison Project (COVID-MIP), we show modeling evidence that the East Asian summer monsoon (EASM) is enhanced in terms of both precipitation and circulation, and the amplitude of the forced response reaches about 1/3 of the standard deviation for interannual variability. The response of EASM to COVID-19 is consistent with the response to the removal of all anthropogenic aerosols simulated by atmospheric component models, which confirms the dominant role of the fast response to reduced aerosols. The observational evidence, i.e., the anomalously strong EASM observed in 2020 and 2021, also supports the simulated enhancement of EASM. The essential mechanism for the enhanced EASM in response to COVID-19 is the enhanced zonal thermal contrast between Asian continent and the western North Pacific in the troposphere, particularly at the upper troposphere, due to the reduced aerosol concentration over Asian continent and the associated latent heating feedback. As the enhancement of EASM is a fast response to the reduction in aerosols, the effect of COVID-19 on EASM dampens soon after the rebound of emissions based on the models participating in COVID-MIP.

scholarly journals On the Robustness of the Weakening Effect of Anthropogenic Aerosols on the East Asian Summer Monsoon with Multimodel Results

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Hongli Wang ◽  
Xiaoning Xie ◽  
Xiaodong Liu
Keyword(s):  
Summer Monsoon ◽  
East Asian Summer Monsoon ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
Summer Precipitation ◽  
Convective Precipitation ◽  
East China ◽  
Cmip5 Models ◽  
Anthropogenic Aerosols ◽  
Asian Summer

Using outputs from 10 CMIP5 models with fixed sea surface temperature, we investigate the fast response of the East Asian summer monsoon (EASM) and summer precipitation in East China to anthropogenic aerosols. To address this topic, we employ two commonly used EASM indices that can represent zonal and meridional land-sea thermal contrast, respectively. The results reveal that the notion of a weakened EASM in response to increased anthropogenic aerosols is a robust one, as well as decreased precipitation in East China. The ensemble mean of decreased precipitation in the aerosol run was about 6.6% in comparison to the CTL run and could be enlarged to 8.3% by excluding the experiments with the aerosol direct effect only. Convective precipitation was found to be the primary contributor (>80%) to the reduction of total precipitation. The combination of direct and indirect effects of aerosols can decrease solar radiation reaching the Earth’s surface and eventually modulate large-scale EASM circulation and suppress summer precipitation in East China. The uncertainties and discrepancies among the models highlight the complexity of interaction in aerosol-precipitation processes when investigating present and future changes of the EASM.

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