Coupling of Gravity Waves and Convection, and Their Impacts on the Dynamics and Predictability of Multiscale Processes Associated with Moist Baroclinic JetFront Systems

重力波和对流的耦合及其对与潮湿斜压射流系统相关的多尺度过程的动力学和可预测性的影响

• 批准号: 1712290
• 负责人: Yunji Zhang
• 金额: $ 68.31万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-15 至 2023-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1712290&HistoricalAwards=false
• 关键词: Coupling; Gravity; Waves; Convection; Their

This study seeks to study the coupling of gravity waves and moist convection, focused on impacts to the dynamics and predictability of multi-scale processes associated with moist baroclinic jetfront systems through high-resolution observational analysis and ensemble simulations. This research will advance our understanding of the relative roles of gravity waves and moist convection regarding severe and extreme weather at middle latitudes, and potentially improve the predictability of tropical systems.Major objectives of this research include: (1) the characterization of the global distribution, source, structure, propagation and amplitude of tropospheric and stratospheric gravity waves, along with their energy and momentum fluxes, using analyses and forecasts from numerical weather prediction (NWP) models; (2) understand the potential impacts of gravity waves and convection on atmospheric energy spectra slopes at the mesoscales and examine the resolvability of gravity waves in NWP models with 1-100 km grid spacing; and (3) to explore the impacts of gravity waves and their interaction with moist convection on the multi-scale atmospheric predictability.

本研究旨在通过高分辨率观测分析和集合模拟研究重力波和湿对流的耦合，重点研究与湿斜压急流锋系统相关的多尺度过程的动力学和可预报性的影响。 这项研究将加深我们对重力波和湿对流在中纬度恶劣和极端天气中的相对作用的理解，并有可能提高热带系统的可预报性。这项研究的主要目标包括：（1）对流层和平流层重力波的全球分布、源、结构、传播和振幅的特征，以及它们的能量和动量通量，沿着，本研究的主要目的是：（1）利用数值天气预报模式的分析和预报;（2）了解重力波和对流对中尺度大气能量谱斜率的潜在影响，并检验重力波在网格间距为1-100 km的数值天气预报模式中的可分辨性;（3）探讨重力波及其与湿对流的相互作用对多尺度大气可预报性的影响。

项目成果

Diurnal Characteristics of Gravity Waves over the Tibetan Plateau in 2015 Summer Using 10-km Downscaled Simulations from WRF-EnKF Regional Reanalysis

• DOI: 10.3390/atmos11060631
• 发表时间: 2020-06
• 期刊: Atmosphere
• 影响因子: 2.9
• 作者: Tingting Qian;Fuqing Zhang;Junhong Wei;Jie He;Yinghui Lu

Convectively Forced Diurnal Gravity Waves in the Maritime Continent

• DOI: 10.1175/jas-d-19-0236.1
• 发表时间: 2019-03
• 期刊: Journal of the Atmospheric Sciences
• 影响因子: 3.1
• 作者: J. Ruppert;Xingchao Chen;Fuqing Zhang

Isentropic Analysis on the Intensification of Hurricane Edouard (2014)

• DOI: 10.1175/jas-d-17-0092.1
• 发表时间: 2017-12
• 期刊: Journal of the Atmospheric Sciences
• 影响因子: 3.1
• 作者: Juan Fang;O. Pauluis;Fuqing Zhang

MJO Affects the Monsoon Onset Timing Over the Indian Region

• DOI: 10.1029/2018gl078804
• 发表时间: 2018-09
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: S. Taraphdar;Fuqing Zhang;L. Leung;Xingchao Chen;O. Pauluis

What Is the Predictability Limit of Midlatitude Weather?

• DOI: 10.1175/jas-d-18-0269.1
• 发表时间: 2019-04
• 期刊: Journal of the Atmospheric Sciences
• 影响因子: 3.1
• 作者: Fuqing Zhang;Y. Q. Sun;L. Magnusson;R. Buizza;Shian‐Jiann Lin;Jan‐Huey Chen;K. Emanuel