Transport into the polar stratosphere from the Asian monsoon region by X. Yan, P. Konopka, F. Ploeger, F. Ploeger, A. Podglajen

“…<p>The Southeast Asian boundary layer has witnessed alarming pollution levels in recent years, which even affects the trace gas composition in the Southern Hemisphere by inter-hemispheric transport. …”
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Impact of Stratospheric Sudden Warming on East Asian Winter Monsoons by Quanliang Chen, Luyang Xu, Hongke Cai

“…Those that could descent to the troposphere were composited to investigate their impacts on the East Asian winter monsoon (EAWM). It reveals that when the SSW occurs, the Arctic Oscillation (AO) and the North Pacific Oscillation (NPO) are both in the negative phase and that the tropospheric circulation is quite wave-like. …”
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Towards quantitative reconstruction of past monsoon precipitation based on tetraether membrane lipids in Chinese loess by J. Guo, J. Guo, M. Ziegler, L. Fuchs, Y. Sun, F. Peterse

“…<p>Variations in the oxygen isotope composition (<span class="inline-formula"><i>δ</i>¹⁸</span>O) of cave speleothems and numerous proxy records from loess–paleosol sequences have revealed past variations in East Asian monsoon (EAM) intensity. However, challenges persist in reconstructing precipitation changes quantitatively. …”
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A novel explainable deep learning framework for reconstructing South Asian palaeomonsoons by K. M. R. Hunt, K. M. R. Hunt, S. P. Harrison

“…<p>We present novel explainable deep learning techniques for reconstructing South Asian palaeomonsoon rainfall over the last 500 years, leveraging long instrumental precipitation records and palaeoenvironmental datasets from South and East Asia to build two types of models: dense neural networks (“regional models”) and convolutional neural networks (CNNs). …”
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Bifurcations in a Nonlinear Dynamical Model between Western Pacific Subtropical High Ridge Line Index and Its Summer Monsoon Impact Factors by Mei Hong, Ren Zhang, Longxia Qian, Jingjing Ge, Jian Chen

“…The western Pacific subtropical high (WPSH) is closely related to Asian climate. Previous studies have shown that a precise dynamical model focusing on the interaction between WPSH and other summer monsoon factors has not been developed. …”
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Role of thermal and dynamical subdaily perturbations over the Tibetan Plateau in 30-day extended-range forecast of East Asian precipitation in early summer by Bian He, Xinyu He, Yimin Liu, Guoxiong Wu, Qing Bao, Wenting Hu, Chen Sheng, Shijian Feng

“…Abstract The influence of the thermodynamic forcing of the Tibetan Plateau (TP) on the Asian summer monsoon remains controversial because the role of elevated heating across the TP remains unclear at multiple time scales. …”
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Recent centennial drought on the Tibetan Plateau is outstanding within the past 3500 years by Yu Liu, Huiming Song, Zhisheng An, Qiang Li, Steven W. Leavitt, Ulf Büntgen, Qiufang Cai, Ruoshi Liu, Congxi Fang, Changfeng Sun, Kerstin Treydte, Meng Ren, Lidong Mo, Yi Song, Wenju Cai, Quan Zhang, Weijian Zhou, Achim Bräuning, Jussi Grießinger, Deliang Chen, Hans W. Linderholm, Ashish Sinha, Hai Cheng, Lu Wang, Ying Lei, Junyan Sun, Wei Gong, Xuxiang Li, Linlin Cui, Liang Ning, Lingfeng Wan, Thomas W. Crowther, Constantin M. Zohner

“…The Tibetan Plateau, the Earth’s largest and highest plateau, is a nexus for global atmospheric processes, significantly influencing East Asian hydroclimate dynamics through the synergy of the Asian Monsoon and the Westerlies. …”
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Spatiotemporal Changes of Extreme Precipitation and Its Teleconnection Analysis with Climate Circulation Indices in Three Gorges Reservoir Area in Recent 60 Years by ZENG Huiqi, TENG Shunlin, SHAO Meng, ZHANG Lu, WANG Yuefeng

“…Analyzing the correlation between large-scale climate circulation and extreme precipitation is of great significance for regional flood and drought warnings and extreme weather management.Previous studies have well revealed the influence of a single climate circulation index,while the influence characteristics of multiple climate circulation indices are still unclear.According to the daily precipitation in 21 meteorological stations in Three Gorges Reservoir Area (TGRA) from 1960 to 2019,eight extreme precipitation indices (CDD,CWD,R10,R20,Rx1d,Rx5d,R95p,and R99p) were constructed in terms of precipitation duration and absoluteness,and Mann-Kendall (M-K) trend test,Spearman correlation analysis,and multiple linear regression (MLR) were used to analyze the spatiotemporal changes during extreme precipitation in the TGRA.Then the correlation between extreme precipitation and climate circulation was revealed in terms of single and multiple factors.The results showed that:①The R10,R20,Rx1d,Rx5d,R95p,and R99p in the TGRA spatially decreased from northwest to southeast from 1960 to 2019,which was similar to the spatial trend of multi-year average precipitation;②the CWD,CDD,R10,and Rx5d generally decreased,while R20,Rx1d,R95p,and R99p increased.The duration of continuous precipitation events in the TGRA shortened,but the frequency and intensity of short-term strong precipitation events increased;③in terms of teleconnection analysis of extreme precipitation and climate circulation index,the multiple factor regression analysis could better explain the extreme precipitation index than the single factor regression analysis.Specifically,the combination of the East Asian Summer Monsoon Index (EASMI) and the South Asian Summer Monsoon Index (SASMI) had the best performance in explaining the extreme precipitation index.This study can provide a scientific basis for coping with extreme climate change and weather disaster prediction and warning in the TGRA.…”
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Spatial and Temporal Distribution Characteristics and Causes of Drought in Northwest China Based on SPEI by FENG Shiyuan, CHU Pinging, YAO Xin, YIN Dejun, GUO Yang

“…Based on monthly precipitation and average temperature data of 113 meteorological stations in Northwest China,through SPEI (standard precipitation evapotranspiration index),this paper analyzes and measures the drought process from 1960 to 2018,discusses the spatial and temporal variation characteristics of drought in Northwest China in recent 60 years combined with M-K test,univariate linear trend analysis and Arcgis software,and studies the drought correlation and periodic characteristics of summer monsoon,ENSO and MEI by using the methods of univariate linear analysis and cross wavelet to find out the causes of drought in Northwest China.The results show that:The multi-timescale SPEI could reflect the drought situation in Northwest China,and the drought intensity increases year by year;The seasonal drought in the study area is obvious,and the drought area increases with the year,especially after 2000s.The drought in eastern Xinjiang,Qinghai and northwest Gansu is extremely serious;SPEI summer drought index has a correlation with East Asian summer monsoon and plateau summer monsoon,and their impact on drought is opposite;The ENSO warm event has a great influence on the drought intensity and frequency before 2000,while after 2000,both ENSO warm and cold events have a great impact on that;The cross-wavelet and wavelet coherence images indicate that SPEI and MEI have similar oscillation period characteristics.There are four periods of high energy,and the resonance period range from 0 to 6 a,indicating that ENSO drives the drought with a period.…”
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Asynchronicity of deglacial permafrost thawing controlled by millennial-scale climate variability by Xinwei Yan, Xu Zhang, Bo Liu, Huw T. Mithan, John Hellstrom, Sophie Nuber, Russell Drysdale, Junjie Wu, Fangyuan Lin, Ning Zhao, Yuao Zhang, Wengang Kang, Jianbao Liu

“…Modeling elaborates that the associated Asian monsoon weakening induces anomalous TP warming through local cloud–precipitation–soil moisture feedback. …”
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The Role of Sulfur Emission from the Petroleum Industry on Ultrafine Particle Number Concentration in Singapore by Suyi Hou, Weihan Li, Liudongqing Yang, Guorong Chen, Yilin Zhang, Mikinori Kuwata

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The Characteristics of Thunderstorms and Their Lightning Activity on the Qinghai-Tibetan Plateau by Lei Hui, Yunjun Zhou, Zhitao Yan

“…Also, the higher total column liquid water content implies higher cloud water content in the warm-cloud region, and the higher cloud-base height implies a thicker warm-cloud region, which is not conducive to the occurrence of +CG lightning. (3) During high-value years (in this study, 2010, 2012, 2014, and 2016), the midlatitude (30°N–60°N) high pressure is strong and the plateau is situated at the intersection of the East Asian and South Asian monsoons and the cold air from the northwest, which strengthens the water vapor convergence and increases the frequency of thunderstorms. …”
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PM2.5 in Sri Lanka: Trend Analysis, Low-cost Sensor Correlations and Spatial Distribution by Ranil Dhammapala, Ashani Basnayake, Sarath Premasiri, Lakmal Chathuranga, Karen Mera

“…Abstract The South Asian island nation of Sri Lanka did not have any permanent PM2.5 monitors sharing data publicly in near-real-time until the U.S. …”
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Upper-tropospheric pollutants observed by MIPAS: geographic and seasonal variations by N. Glatthor, G. P. Stiller, T. von Clarmann, B. Funke, S. Kellmann, A. Linden

“…Other characteristic features are eastward transport of anthropogenic <span class="inline-formula">C₂H₆</span> and of biogenic HCOOH from Central and North America in boreal summer, accumulation of pollutants in the Asian monsoon anticyclone (AMA), and enhanced <span class="inline-formula">C₂H₂</span> over southeastern Asia in boreal winter. …”
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