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.

控制跨半球气候联系以及热带地区和高纬度地区之间联系的机制尚不清楚，这种知识差距是由于缺乏过去气候变化的高分辨率和良好的日期记录而造成的。以及西太平洋地区缺乏共同的气候振荡模式限制了对年际至十年时间尺度上更广泛的气候遥相关的理解该项目旨在开发一个新的温度和水文气候变化数据网络。跨越从喜马拉雅山到南大洋的横断面，可以追溯到 500-1000 年前，这是一个由美国国家科学基金会地球科学理事会 (NSF/GEO) 和国家环境研究委员会 (NERC) 联合资助的项目。英国 (UK) 通过 NSF/GEO-NERC 牵头机构协议，该协议允许美国/英国的单一联合提案由其调查员比例最大的机构提交并进行同行评审。成功联合确定资助后，每个机构将资助与其本国相关的预算和调查人员的比例。研究人员将重新利用从更广泛的季风亚洲到南部中纬度地区收集的现有树木年轮样本，并使用新的示踪剂（代理），蓝光强度，作为温度和水文气候的指标，这种新的代理将增强先前几乎完全基于单一总环宽度参数的气候分析，并将用于模拟和重建大气的关键模式。海洋之间的变化具体来说，研究人员将利用这些数据来解决以下问题：（1）过去的火山事件对热带和南半球的气候有何影响？（2）热带辐合带和厄尔尼诺现象有何影响？过去 500-1000 年间，南方涛动在热带印度洋-太平洋地区发生了变化并相互作用；(3) 南方环状模在过去发生了怎样的变化？千年，它是如何受到热带和其他强迫驱动的？潜在的更广泛的影响包括更好地了解气候敏感但数据稀疏的东半球过去的变化，其中包括全球一些气候最脆弱的地区。将通过公共存储库和科学会议向更广泛的科学界传播；并将包含在季风亚洲干旱地图集的未来版本中。该项目将支持莱德大学和莱德大学的三名本科生的培训。促进哥伦比亚大学和莱德大学之间的国内合作以及与英国、捷克共和国、澳大利亚和新西兰大学的国际合作。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查进行评估，被认为值得支持标准。