Diversity of Tropical Intraseasonal Oscillation

热带季节内振荡的多样性

• 批准号: 2025057
• 负责人: Bin Wang
• 金额: $ 67.29万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-11-01 至 2024-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2025057&HistoricalAwards=false
• 关键词: Diversity; Tropical; Intraseasonal; Oscillation

The large-scale atmospheric circulation in the tropical region strongly fluctuates on a timescale of a few months. Such tropical intraseasonal “oscillation” (ISO) is dominated by the Madden-Julian Oscillation (MJO) phenomenon between November-April and the Boreal Summer Intraseasonal Oscillation (BSISO) phenomenon between June-October. The MJO typically elicits patterns of enhanced rainfall (and deep clouds) that evolve eastward while BSISO produces northeastward migrating intense rainfall patterns. Both phenomena greatly impact weather and climate worldwide. Recent observations have revealed that events associated with MJO/BSISO are quite diverse, differing strikingly in structure, propagation, lifecycle, and global impacts. Characterization and understanding of ISO diversities and their climate variations are crucial for realistic modeling and skillful prediction of global atmospheric variations. However, to date, they are largely unknown. Thus, this research aims to reveal the distinctive forms of ISO diversity and its impacts on extreme weather events, and to understand the fundamental processes governing the diversity and its decadal variability and future change. Results from this research can shed new light on tropical dynamics and monsoons as well as improve weather and climate forecasting for regions of over 1 billion people impacted by ISO. The researcher plans to host an international workshop to galvanize community interests in ISO. He will mentor a post-doctoral research scientist and train a graduate student.The specific research objectives are to: (a) detect and characterize a full range of ISO diversity in their initiation, propagation, structure, amplification/decay, and impacts, (b) elucidate the mechanisms responsible for generation of the diversified ISO behavior, (c) reveal global and regional sources of ISO decadal variability, and (d) quantify how the ISO diversity responds to anthropogenic forcing. To address these objectives, the researcher will employ a strategy of combining process- and dynamics-oriented diagnostics, theoretical analyses, and modeling. Results from this work may lead to a new conceptual framework for understanding ISO complexity and a new avenue to unravel root causes of ISO decadal variability and its future change.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

热带地区的大规模大气循环在几个月的时间范围内强烈波动。这种热带季节性的“振荡”（ISO）以11月至4月和北极夏季季节内振荡（BSISO）现象之间的Madden-Julian振荡（MJO）现象主导。 MJO通常会引起增强的降雨（和深云）的模式，这些模式向东发展，而BSISO会产生东北迁移的强烈降雨模式。两者都极大地影响了天气和气候。最近的观察结果表明，与MJO/BSISO相关的事件非常多样化，在结构，繁殖，生命周期和全球影响方面具有显着区别。对ISO多样性及其气候变化的表征和理解对于现实的建模和对全球大气变化的熟练预测至关重要。但是，迄今为止，它们在很大程度上是未知的。这是该研究旨在揭示ISO多样性的独特形式及其对极端天气事件的影响，并了解涵盖多样性及其际变异性和未来变化的基本过程。这项研究的结果可能会给热带动态和季风，以及对超过10亿人受ISO影响的地区的天气和气候预测的改善。研究人员计划举办国际研讨会，以激发ISO社区利益。他将指导博士后研究科学家并培训研究生。具体的研究目标是：（a）在其主动性，繁殖，结构，扩增/衰减以及影响以及（b）阐明了多样化的ISO行为的机制，（c）揭示了ISO的全球范围，（c）的机制（c），（c）揭示了（c），（C）多样性对人为强迫的反应。为了解决这些目标，研究人员将采用一种结合过程和动态诊断，理论分析和建模的策略。这项工作的结果可能会导致一个新的概念框架，以理解ISO复杂性，并为揭示ISO衰老变异性的根本原因及其未来变化的新途径。该奖项反映了NSF的法定任务，并被认为是通过基金会的智力优点和更广泛的影响审查标准通过评估来评估的。

项目成果

Diversity of intraseasonal oscillation over the western North Pacific

• DOI: 10.1007/s00382-021-05780-2
• 发表时间: 2021-04
• 期刊: Climate Dynamics
• 影响因子: 4.6
• 作者: Hui Wang;Fei Liu;Bin Wang;Guosen Chen;W. Dong

Subseasonal controls of U.S. landfalling tropical cyclones

对美国登陆热带气旋的次季节控制

• DOI: 10.1038/s41612-022-00289-9
• 发表时间: 2022
• 期刊: npj Climate and Atmospheric Science
• 影响因子: 9
• 作者: Xiang, Baoqiang;Wang, Bin;Zhang, Wei;Harris, Lucas;Delworth, Thomas L.;Zhang, Gan;Cooke, William F.
• 通讯作者: Cooke, William F.

Improved boreal summer intraseasonal oscillation simulations over the Indian Ocean by modifying moist parameterizations in climate models

• DOI: 10.1007/s00382-021-05822-9
• 发表时间: 2021-05
• 期刊: Climate Dynamics
• 影响因子: 4.6
• 作者: Young‐Min Yang;Jeong-A Cho;J. Moon;Ki-Young Kim;Bin Wang

Origins of the Intraseasonal Variability of East Asian Summer Precipitation

• DOI: 10.1029/2021gl096574
• 发表时间: 2022-02
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Qiaoling Ren;Fei Liu;Bin Wang;Song Yang;Hui Wang;Wen-jie Dong

S2S Prediction in GFDL SPEAR: MJO Diversity and Teleconnections

GFDL SPEAR 中的 S2S 预测：MJO 多样性和遥相关

• DOI: 10.1175/bams-d-21-0124.1
• 发表时间: 2022
• 期刊: Bulletin of the American Meteorological Society
• 影响因子: 8
• 作者: Xiang, Baoqiang;Harris, Lucas;Delworth, Thomas L.;Wang, Bin;Chen, Guosen;Chen, Jan-Huey;Clark, Spencer K.;Cooke, William F.;Gao, Kun;Huff, J. Jacob
• 通讯作者: Huff, J. Jacob