Collaborative Research: NSFGEO-NERC: P2C2--Understanding Trans-Hemispheric Modes of Climate Variability: A Novel Tree-Ring Data Transect spanning the Himalaya to the Southern Ocean

合作研究：NSFGEO-NERC：P2C2——了解气候变化的跨半球模式：跨越喜马拉雅山到南大洋的新型树轮数据样带

• 批准号: 2102759
• 负责人: Brendan Buckley
• 金额: $ 55.26万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-07-15 至 2025-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2102759&HistoricalAwards=false
• 关键词: Collaborative; Research; NSFGEO; NERC; P2C2

The mechanisms that govern trans-hemispheric climate linkages and those between the tropics and higher latitudes are not well understood. This gap in knowledge is caused by a lack of high resolution and well dates records of past climate variability. The sparsity of the data coverage as well as the lack of common climate oscillatory modes in the western Pacific region limits the understanding of broader-scale climate teleconnections on interannual to decadal time scales. This project aims to develop a new data network of temperature and hydroclimate variability across a transect spanning from the Himalaya to the Southern Ocean and extending back to 500-1000 years. This is a project that is jointly funded by the National Science Foundation’s Directorate of Geosciences (NSF/GEO) and the National Environment Research Council (NERC) of the United Kingdom (UK) via the NSF/GEO-NERC Lead Agency Agreement. This Agreement allows a single joint US/UK proposal to be submitted and peer-reviewed by the Agency whose investigator has the largest proportion of the budget. Upon successful joint determination of an award, each Agency funds the proportion of the budget and the investigators associated with its own country.The researchers will repurpose existing tree ring samples collected from the broader monsoon Asia down to the southern middle latitudes and use a new tracer (proxy), blue light intensity, as an indicator of temperature and hydroclimate. This new proxy will enhance prior climate analyses based almost entirely on the single total ring-width parameter and will be used to model and reconstruct key modes of atmosphere-ocean variability between the northern and southern hemispheres. Specifically, the researchers will use these data to address the following questions: (1) What are the climatic impacts of past volcanic events in the tropics and Southern Hemisphere? (2) How have the Intertropical Convergence Zone and El nino Southern Oscillation varied and interacted over the past 500-1000 years as expressed across the tropical Indo-Pacific region? and (3) How has the Southern Annular Mode varied over the past millennium, and how is it driven by tropical and other forcing?The potential broader impacts include an improved understanding of past variability in the climate-sensitive yet data-sparse Eastern Hemisphere which includes some of the most climatically vulnerable regions of the globe. These data will be disseminated to the broader scientific community via public repositories and at scientific conferences; and will be included in a future iteration of the Monsoon Asia Drought Atlas. The project will support the training of three undergraduate students at Rider university and foster national collaborations between Columbia University and Ryder University and international collaborations with universities in the UK, Czech republic, Australia and New Zealand.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.

尚不清楚跨性山脉气候联系以及热带和更高纬度之间的机制。知识的差距是由于缺乏高分辨率和过去气候变异性的良好日期记录所致。西太平洋地区的数据覆盖范围的稀疏性以及缺乏常见的气候振荡模式限制了对年龄段至十年时间尺度的更广泛气候远程连接的理解。该项目旨在开发一个新的数据网络，该数据网络是从喜马拉雅山到南大洋的短暂变化，并延伸至500 - 1000年。这是一个由国家科学基金会地球科学局（NSF/GEO）和英国国家环境研究委员会（NERC）共同资助的项目，该项目通过NSF/GEO-GEO-NERC领先机构协议。协议允许该机构提交和同行评审的一项联合提案，其调查员的预算比例最大。成功确定奖励后，每个机构都为预算的比例和与其国家 /国家相关的调查人员提供了资金。研究人员将复制从更广泛的季风从较大的季风到南部的中间纬度地区收集的现有树环样本，并使用新的示踪剂（Proxy）（Proxy），蓝色的光强度，作为温度和氢化气候的指示器。这个新的代理将几乎完全基于单个环宽参数来增强先前的气候分析，并将用于建模和重建北半球和南半球之间大气 - 海洋可变性的关键模式。具体而言，研究人员将使用这些数据来解决以下问题：（1）过去火山事件在热带和南半球的慢性影响是什么？ （2）在过去的500 - 1000年中，在热带印度太平洋地区表达的过去500 - 1000年中，受热带收敛区和El Nino Southern振荡如何变化和相互作用？ （3）在过去的千年中，南方环形模式如何变化，如何由热带和其他强迫驱动？潜在的广播公司的影响包括对气候敏感性但数据范围内半球的过去变异性的提高理解，其中包括一些最具文化的脆弱区域。这些数据将通过公共存储库和科学会议传播到更广泛的科学界；并将被包括在季风亚洲干旱地图集的未来迭代中。该项目将支持Rider University的三名本科生的培训，并在哥伦比亚大学和赖德大学之间进行培养，以及与英国，捷克共和国，澳大利亚和新西兰大学的国际合作。这奖反映了NSF的法定任务，并通过该基金会的知识优点和广泛的criperia来诚实地通过评估来进行评估，以诚实地进行评估。