Solar Influences on Tropical Deep Convection and the Madden-Julian Oscillation (MJO): Observational Analyses and Tests of a Proposed Mechanism

GSTDTAP

项目编号	1643160
	Solar Influences on Tropical Deep Convection and the Madden-Julian Oscillation (MJO): Observational Analyses and Tests of a Proposed Mechanism
	Lon Hood
主持机构	University of Arizona
项目开始年	2017
	2017-03-15
项目结束日期	2018-08-31
资助机构	US-NSF
项目类别	Standard Grant
项目经费	171538(USD)
国家	美国
语种	英语
英文摘要	The objective of this project is to apply available observations to evaluate whether short-term solar ultraviolet variability (occurring mainly on the ~ 27-day solar rotation time scale) can influence tropical climate variability on time scales from weeks to months. It will specifically explore whether previously reported evidence for such an influence in the tropical Pacific sector is indeed robust. Statistical analyses will employ a total of 20 years of solar ultraviolet radiation measurements under solar maximum conditions when 27-day variations are especially large. Coincident meteorological fields such as temperature and wind near the troposphere will be analyzed to determine whether short-term solar ultraviolet forcing can significantly perturb the stratification of the tropical upper troposphere and thereby modify the environment condition for deep convections. Associated effects on synoptic and large-scale circulations will be investigated. The PI will also explore whether such responses to the 27-day solar depend on season or on the phases of the El-Niño/Southern Oscillation as well as the stratospheric quasi-biennial oscillation. The statistical significance of any detected responses will be assessed using standard methods. Confirmation of a significant short-term solar impact on tropical convection and short-time climate variability would (a) provide a new observation for testing climate models that include solar forcing; (b) lead to improvements in extended-range weather forecasting; and (c) improve our understanding of short-time climate variability. The project will support one graduate student and one undergraduate student.
来源学科分类	Geosciences - Atmospheric and Geospace Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/70872
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Lon Hood.Solar Influences on Tropical Deep Convection and the Madden-Julian Oscillation (MJO): Observational Analyses and Tests of a Proposed Mechanism.2017.