Solar Influences on Tropical Deep Convection and the Madden-Julian Oscillation (MJO): Observational Analyses and Tests of a Proposed Mechanism
太阳对热带深对流和马登-朱利安振荡 (MJO) 的影响:对拟议机制的观测分析和测试
基本信息
- 批准号:1643160
- 负责人:
- 金额:$ 17.15万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2017
- 资助国家:美国
- 起止时间:2017-03-15 至 2019-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
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.
该项目的目标是利用现有观测资料评估短期太阳紫外线变率(主要发生在太阳自转时间尺度约为27天的范围内)是否能影响从数周到数月的时间尺度上的热带气候变率。它将特别探讨以前报告的太平洋热带地区这种影响的证据是否确实有力。 统计分析将采用在太阳活动最大期条件下总共20年的太阳紫外线辐射测量数据,因为27天的变化特别大。 将分析对流层附近的温度和风等气象场,以确定短期太阳紫外线强迫是否会显著扰动热带对流层上层的层结,从而改变深对流的环境条件。 将研究对天气和大尺度环流的相关影响。PI还将探讨这种对27天太阳活动的反应是否取决于季节或厄尔尼诺/南方涛动的阶段以及平流层准两年期振荡。 将使用标准方法评估任何检测到的反应的统计学显著性。 确认太阳对热带对流和短期气候变率的重大短期影响将(a)为测试包括太阳强迫在内的气候模型提供新的观测;(B)改进长期天气预报;(c)增进我们对短期气候变率的了解。该项目将支持一名研究生和一名本科生。
项目成果
期刊论文数量(3)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Stratospheric Influences on the MJO-Induced Rossby Wave Train: Effects on Intraseasonal Climate
- DOI:10.1175/jcli-d-18-0811.1
- 发表时间:2020-01
- 期刊:
- 影响因子:4.9
- 作者:L. Hood;M. Redman;W. Johnson;Thomas J. Galarneau
- 通讯作者:L. Hood;M. Redman;W. Johnson;Thomas J. Galarneau
Short-Term Solar Modulation of the Madden–Julian Climate Oscillation
- DOI:10.1175/jas-d-17-0265.1
- 发表时间:2018-03
- 期刊:
- 影响因子:3.1
- 作者:L. Hood
- 通讯作者:L. Hood
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Lon Hood其他文献
The representation of solar cycle signals in stratospheric ozone. Part II: Analysis of global models
平流层臭氧中太阳周期信号的表示。
- DOI:
10.5194/acp-2017-477 - 发表时间:
2018 - 期刊:
- 影响因子:6.3
- 作者:
Amanda C. Maycock;Katja Matthes;Susann Tegtmeier;Hauke Schmidt;Remi Thieblemont;Lon Hood;Slimane Bekki;Makoto Deushi;Patrick Jockel;Oliver Kirner;Markus Kunze;Marion Marchand;Daniel R. Marsh;Martine Michou;Laura E. Revell;Eugene Rozanov;Andrea Stenke;Yous - 通讯作者:
Yous
Lon Hood的其他文献
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{{ truncateString('Lon Hood', 18)}}的其他基金
Collaborative Research: The Quasi-Biennial Oscillation and Madden-Julian Oscillation (QBO-MJO) Connection: Positive Feedbacks from Extratropical Wave Forcing
合作研究:准两年一次振荡和马登-朱利安振荡(QBO-MJO)的联系:温带波强迫的正反馈
- 批准号:
2039384 - 财政年份:2020
- 资助金额:
$ 17.15万 - 项目类别:
Standard Grant
Role of the Stratosphere in 11-Yr Solar Forcing of Surface Climate: Diagnostic Comparisons of Observations With Model Simulations
平流层在 11 年太阳强迫地表气候中的作用:观测与模型模拟的诊断比较
- 批准号:
1251092 - 财政年份:2013
- 资助金额:
$ 17.15万 - 项目类别:
Standard Grant
Origin of the Tropical Lower Stratospheric Response to 11-Year Solar Forcing: Possible Feedbacks from the Coupled Troposphere-Ocean Response
热带低平流层对 11 年太阳强迫响应的起源:对流层-海洋耦合响应的可能反馈
- 批准号:
1067827 - 财政年份:2011
- 资助金额:
$ 17.15万 - 项目类别:
Standard Grant
Dynamical Effects of Solar Ultraviolet Variations in the Lower Stratosphere
平流层下部太阳紫外线变化的动力学效应
- 批准号:
0424840 - 财政年份:2004
- 资助金额:
$ 17.15万 - 项目类别:
Continuing Grant
The Quasi-Decadal Oscillation: An Observational and Theoretical Study
准十年振荡:观测和理论研究
- 批准号:
9712708 - 财政年份:1997
- 资助金额:
$ 17.15万 - 项目类别:
Continuing Grant
Stratospheric Dynamical Effects of Solar Ultraviolet Variations
太阳紫外线变化的平流层动力学效应
- 批准号:
9012012 - 财政年份:1990
- 资助金额:
$ 17.15万 - 项目类别:
Continuing Grant
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