The Distance Effect Annual Cycle in Earth's Climate

地球气候的距离效应年周期

基本信息

  • 批准号:
    2303385
  • 负责人:
  • 金额:
    $ 55.63万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2023
  • 资助国家:
    美国
  • 起止时间:
    2023-08-15 至 2026-07-31
  • 项目状态:
    未结题

项目摘要

This project aims to investigate the impact of two aspects of Earth’s orbital geometry on its climate. The Western Pacific Warm Pool of the tropical Pacific Ocean retains the largest and warmest sea surface water body on Earth while the eastern equatorial Pacific is characterized by strong upwelling of cold, nutrient-rich deep waters, termed the Pacific cold tongue. Understanding the evolution of the Pacific warm pool and cold tongue are important because they control the circum-Pacific climate and impact the globe via El Nino-Southern Oscillation (ENSO) teleconnections.Previous research indicates that the Pacific cold tongue has two annual cycles driven by distinct features of the Earth’s orbit. One of these cycles is driven by the seasonal migration of the InterTropical Convergence Zone (ITCZ) and is ultimately linked to the seasonal and latitudinal distribution of solar insolation due to the tilt of the Earth’s axis – the “tilt” effect. While this “tilt” effect annual cycle has been extensively studied, the other “distance” effect is less so. It is argued that the “distance” effect arises from seasonal variations in the strength of the Walker circulation and is forced by the annual evolution of the Earth-Sun distance due to the eccentricity of Earth’s orbit.This research project will investigate how the distance effect imprints its climate influence on Earth, specifically on the: 1) distance-effect seasonality of the atmospheric general circulation; 2) seasonality of regional climates, choosing regions where the distance effect has a disproportionately large impact relative to tilt, including the westerlies over the South Pacific; and 3) tropical Pacific mean state and El Nino-Southern Oscillation (ENSO).The potential Broader Impacts (B.I.) include support for graduate and undergraduate students, public outreach, and a more comprehensive understanding of climate with important societal impacts.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.
该项目旨在调查地球轨道几何形状的两个方面对其气候的影响。 热带太平洋的西太平洋暖池保留了地球上最大和最温暖的海表水体,而赤道东太平洋的特点是寒冷、营养丰富的深层沃茨的强烈上涌,称为太平洋冷舌。太平洋暖池和冷舌的演变对控制环太平洋气候和影响地球仪具有重要意义。其中一个周期是由热带辐合带(ITCZ)的季节性迁移驱动的,最终与由于地轴倾斜而导致的太阳辐射的季节和纬度分布有关-“倾斜”效应。虽然这种"倾斜"效应的年周期已被广泛研究,其他"距离"效应则较少。距离效应是由步行者环流强度的季节性变化引起的,并受地球轨道偏心率引起的地日距离的年变化的影响。本研究计划将探讨距离效应如何影响地球气候,特别是:1)大气环流的距离效应季节性; 2)区域气候的季节性,选择距离效应相对于倾斜具有不成比例的大影响的区域,包括南太平洋的西风带;和3)热带太平洋平均状态和厄尔尼诺南方涛动(ENSO)。包括对研究生和本科生的支持,公众宣传,以及对具有重要社会影响的气候的更全面的理解。该奖项反映了NSF的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。

项目成果

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John Chiang其他文献

Subsidiary Performance In MNCs: The Influences Of Absorptive Capacity And Social Capital On Knowledge Transfer
跨国公司子公司绩效:吸收能力和社会资本对知识转移的影响
LOS RIOS COMMUNITY COLLEGE DISTRICT
洛斯里奥斯社区学院区
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    John Chiang
  • 通讯作者:
    John Chiang
A Simple Solution for Homomorphic Evaluation on Large Intervals
大区间同态评估的简单解决方案
  • DOI:
  • 发表时间:
    2024
  • 期刊:
  • 影响因子:
    0
  • 作者:
    John Chiang
  • 通讯作者:
    John Chiang
Leber congenital amaurosis in Chuuk, Federated States of Micronesia
  • DOI:
    10.1016/j.jaapos.2018.07.179
  • 发表时间:
    2018-08-01
  • 期刊:
  • 影响因子:
  • 作者:
    Amani S. Albakri;Jenina Capasso;Sarina Kopinsky;Tom Glaser;Anamaria Yomai;John Chiang;Adele Schneider;Alex V. Levin
  • 通讯作者:
    Alex V. Levin

John Chiang的其他文献

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{{ truncateString('John Chiang', 18)}}的其他基金

Collaborative Proposal: Exploring Hypotheses of Southern Hemisphere Westerly Wind Changes on Southern Ocean Circulation and Biogeochemistry
合作提案:探索南半球西风变化对南大洋环流和生物地球化学的假设
  • 批准号:
    1537496
  • 财政年份:
    2015
  • 资助金额:
    $ 55.63万
  • 项目类别:
    Standard Grant
P2C2: Role of Westerly Jet Transitions in East Asian Paleoclimate
P2C2:西风急流转变在东亚古气候中的作用
  • 批准号:
    1405479
  • 财政年份:
    2014
  • 资助金额:
    $ 55.63万
  • 项目类别:
    Standard Grant
Atmospheric Teleconnection Dynamics of North Atlantic Cooling to the Tropical Climate
北大西洋变冷对热带气候的大气遥相关动态
  • 批准号:
    1143329
  • 财政年份:
    2012
  • 资助金额:
    $ 55.63万
  • 项目类别:
    Standard Grant
RAPID: Long-term Trends of the Atlantic Interhemispheric SST Gradient in the CMIP5 20th Century Simulations
RAPID:CMIP5 20 世纪模拟中大西洋半球海温梯度的长期趋势
  • 批准号:
    1126351
  • 财政年份:
    2011
  • 资助金额:
    $ 55.63万
  • 项目类别:
    Standard Grant
Collaborative research: The Tropical Pacific in Glacial-Interglacial Climate Dynamics
合作研究:冰期-间冰期气候动力学中的热带太平洋
  • 批准号:
    0902774
  • 财政年份:
    2009
  • 资助金额:
    $ 55.63万
  • 项目类别:
    Standard Grant
Collaborative Research: Tropical Marine Climate Feedback to Mid- and High-Latitude Climate Change
合作研究:热带海洋气候对中高纬度气候变化的反馈
  • 批准号:
    0438201
  • 财政年份:
    2005
  • 资助金额:
    $ 55.63万
  • 项目类别:
    Continuing Grant

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