干旱是世界上最具破坏性的自然灾害之一，通常伴随着降水亏损、高温或热浪事件。在异常大气环流（例如高压系统）影响下，干旱事件可以在几周内缓慢发展，也可以在几天内突然发生，并持续数周、数月甚至数年，进而影响水质和水资源供应、公共卫生、粮食安全和自然环境。越来越多的证据表明，温室气体引起的全球变暖，导致蒸发需求普遍增加及区域降水减少，致使干旱事件更频繁、更严重和更持久。同时，人口、农业和工业活动的增长也增加了对淡水资源的需求，提升干旱风险。虽然诸多研究已经指出21 世纪干旱风险增加的问题，但需要更多的努力来全面分析和了解气候变化下过去、现在和未来的干旱变化。

　　《大气科学进展》与国际气象与大气科学协会（IAMAS）合作，邀请来自中国、美国、英国、澳大利亚、巴西、加纳、德国等在干旱和极端气候领域有深入研究和卓越号召力的科学家担任客座编辑，组织“干旱的过去、现在和未来的成因、影响和可预报性”专刊。专刊关注气候变暖下的干旱风险，了解干旱形成机制，以及干旱的归因、预测和预估，从而有助于更透彻地了解气候变化下的干旱变化和变异性。专刊详情如附，投稿截止日期为2022年10月31日，欢迎投稿！

　　Guest Editors:

　　Lisa Alexander, University of New South Wales, Australia (also representing IAMAS)

　　Iracema Cavalcanti, National Institute for Space Research, Brazil (also representing ICDM/IAMAS)

　　Aiguo Dai, State University of New York at Albany, U. S. A.

　　Buwen Dong, University of Reading, U. K.

　　Jianping Huang, Lanzhou University, China

　　Nana Ama Browne Klutse, University of Ghana, Ghana

　　Hyacinth Nnamchi, GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany

　　Lixia Zhang, Institute of Atmospheric Physics, Chinese Academy of Sciences

　　Tianbao Zhao, Institute of Atmospheric Physics, Chinese Academy of Sciences

　　Scope:

　　Drought is a recurring dry condition with below-normal precipitation and is often associated with warm temperatures or heatwaves. A drought event can develop slowly over several weeks or suddenly within days, commonly under abnormal atmospheric conditions (e.g., quasi-stationary high-pressure systems), and can persist for weeks, months, or even years, often exerting great socio-economic impacts. The consequences of drought are far-reaching, impacting the water quality and supply, public health, food security, and the natural environment. Increasing evidence suggests that greenhouse gas-induced global warming can lead to more frequent, severe, and long-lasting droughts due to ubiquitous increases in evaporative demand under rising temperatures and decreased precipitation over subtropical areas. Meanwhile, population growth and associated increases in agricultural and industrial activities also strengthen the demand for freshwater resources, potentially increasing drought risk. Thus, there have been great concerns of increased drought risk as global warming continues. While many studies have addressed the increased risk of drought in the 21st century, more efforts are needed to fully analyze and understand droughts in the past, present, and future under a changing climate.

　　This special issue focuses on analyzing drought risk under a warming climate, understanding drought formation mechanisms, and the attribution, prediction, and projection of drought. Consolidated publications on this topic in this special issue will facilitate the synthesis of new research results, identify key scientific gaps, and hence contribute to a more thorough understanding of drought changes and variability under a changing climate. Submissions in, but not limited to, the following research areas are invited:

　　Topics:

　　1. Global and regional quantification, analysis, and understanding of drought changes and variations in paleoclimate data and instrumental records, including the attribution and understanding of externally forced (e.g., by historical GHG or aerosol forcing) and internally generated (e.g., by ENSO, PDO/IPO and AMO) drought variations and changes;

　　2. Global and regional analysis and understanding of model-projected changes in future drought characteristics, including drought frequency, duration, severity, and area;

　　3. Investigation of drought formation mechanisms in present and future climates, such as the onset, growth, and decay of drought, the relative importance of large-scale atmospheric circulation and the associated remote ocean conditions versus local feedbacks, the key drivers of recent and future drought changes; and the role of human activities (e.g., urbanization, land cover change, water usage, etc.);

　　4. Seasonal and decadal predictability of regional droughts over the globe, including those associated with ENSO, PDO/IPO, and AMO;

　　5. Attribution of anthropogenic influence on recent individual drought events using historical model simulations;

　　6. Regional, national, and global assessments of the impacts of historical and future droughts and heatwaves on the natural environment, agriculture, human health, and other sectors.

　　Important dates:

　　Manuscript Submission Deadline: October 31, 2022.

　　Estimated publication time: Published online once accepted.

　　Final Print: Summer 2023.

　　Submission URL: https://mc03.manuscriptcentral.com/aasiap

　　Please select manuscript type: “Special issue: Drought”

　　Please refer to the Author Guide for an MS Word template, Endnote reference style, and more detailed style instructions (http://www.iapjournals.ac.cn/aas/news/AuthorGuide.htm ).

　　Advances in Atmospheric Sciences (AAS), launched in 1984, aims to rapidly publish the latest achievements and developments on the dynamics, physics, and chemistry of the Earth’s atmosphere and ocean. It also aims to rapidly publish potentially high influential paspers on the atmospheres of other planets and on earth system dynamics in which the atmosphere and/or ocean are involved. AAS is published by Springer and indexed by the SCI database (latest IF: 3.158). For more information about AAS, please visit https://www.springer.com/376

　　Do feel free to contact us at aas@mail.iap.ac.cn if you have any questions regarding the special issue.