Collaborative Research: P2C2--Reconstructing Holocene Dynamics of the Indo-Pacific Tropical Rain Belt using Australian Stalagmites and Coupled Climate Models
合作研究:P2C2——利用澳大利亚石笋和耦合气候模型重建印度洋-太平洋热带雨带全新世动态
基本信息
- 批准号:1602455
- 负责人:
- 金额:$ 9.32万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2016
- 资助国家:美国
- 起止时间:2016-06-01 至 2020-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This collaborative project generally aims to develop a high resolution aragonite stalagmite record of Holocene Indo-Australian Summer Monsoon (IASM) variability from cave KNI-51, located at the southern margin of the Indo-Pacific tropical rain belt (TRB), a region bounded by the austral and boreal summer intertropical convergence zones. Regional monsoons represent the dominant component of low latitude hydroclimate and are sensitive to a wide array of sub-orbital forcings including solar irradiance, ENSO, and volcanic and anthropogenic aerosols. Tropical societies and ecosystems rely heavily on monsoon rainfall, and thus understanding the origin and nature of decadal-scale hydroclimate variability is critical to understanding the dynamics at play in such systems.Recent field studies of Indo-Pacific hydroclimate suggests that over the last millennium, the TRB may have contracted during the Little Ice Age (LIA) thereby producing reduced monsoon rainfall along both the northern and southern margins of the TRB. In contrast, paleohydrologic and modeling studies show that the global TRB shifted southward meridionally at this time, creating anti-phasing (dry/wet) of rainfall between the TRB northern and southern margins. The researchers have developed a sub-decadal resolved (~4 year) late Holocene (the last 3,000 years) IASM reconstruction from cave KNI-51 that, when integrated with paleomonsoon records from Southeast Asia and the Maritime Continent, reveal not only TRB contraction during the LIA, but expansion and contraction at multi-decadal to centennial time scales over the entirety of the late Holocene. The specific research goals of the project are to extend the KNI-51 stalagmite record through the middle and early Holocene (9,000-3,000 years ago) to examine the nature of TRB dynamics during conditions distinct from those of the late Holocene, including elevated contrasts between summer insolation in the Northern and Southern Hemispheres, lower eustatic sea level (and increased exposure of Indo-Pacific continental shelf), intervals of reduced Atlantic meridional overturning circulation, and the El Nino-Southern Oscillation (ENSO) regime. To better understand atmospheric circulation associated with TRB dynamics, these proxy data will be integrated with climate dynamical analyses of the 6,000 year time slice simulations conducted within the Coupled Model Intercomparison Project phase 5/Paleoclimate Modeling Intercomparison Project phase 3 (CMIP5/PMIP3) framework and with the newly available Last Millennium Ensemble (LME) simulations conducted by the National Center for Atmospheric Research (NCAR).The project involves the potential for a unique view of TRB variability over the last 9,000 years and provides an important test of the skill of CMIP5-class models to accurately reproduce associated Indo-Pacific atmospheric dynamics. As the TRB is closely tied to tropical methane production, this research will help refine estimates of regional tropical methane fluxes during the Holocene. The research will be conducted with extensive involvement of undergraduate students thereby providing experience in advanced paleoclimate research and data analysis techniques.
该协作项目通常旨在开发高分辨率的陆战石stalagmite记录,该记录是印度 - 澳大利亚夏季季风(IASM)的可变性,位于印度太平洋热带雨带(TRB)的南部边缘(TRB)的南部边缘,该地区是由澳大利亚和自卫夏季夏季室内互动式Zones界定的。区域季风代表了低纬度气候的主要成分,并且对包括太阳辐照度,ENSO以及火山和人为气溶胶在内的各种亚轨道弯曲敏感。 热带社会和生态系统在很大程度上依赖于季风降雨,因此理解了十年级级氢化气候变化的起源和性质,对于理解这种系统中的动态至关重要。印度 - 太平洋氢化气候的现场研究表明,在过去的千年中,TRB可能与冰上的降雨相同,这是北方的降雨(Lia),这是Mar的降雨(Lia),这是Mar的范围。 trb。 相比之下,古水力学和建模研究表明,此时全球TRB向南移动,从而产生了TRB北部和南部边缘之间的降雨(干/湿)。 The researchers have developed a sub-decadal resolved (~4 year) late Holocene (the last 3,000 years) IASM reconstruction from cave KNI-51 that, when integrated with paleomonsoon records from Southeast Asia and the Maritime Continent, reveal not only TRB contraction during the LIA, but expansion and contraction at multi-decadal to centennial time scales over the entirety of the late Holocene. The specific research goals of the project are to extend the KNI-51 stalagmite record through the middle and early Holocene (9,000-3,000 years ago) to examine the nature of TRB dynamics during conditions distinct from those of the late Holocene, including elevated contrasts between summer insolation in the Northern and Southern Hemispheres, lower eustatic sea level (and increased exposure of Indo-Pacific continental shelf), intervals of reduced Atlantic meridional推翻循环和埃尔尼诺 - 南方振荡(ENSO)制度。为了更好地理解与TRB动态相关的大气循环,这些代理数据将与气候动力学分析集成,以耦合模型对比计划阶段5/古气候建模项目阶段3(CMIP5/PMIP3)的框架(CMIP5/pmip3)框架(CMIP5/pmip3)框架(CMIP5/pmip3)框架(LMERERION ENDERDERCTION)(LME)ENDENEMERS ENDENEMER(LME)进行的6,000年时间切片模拟(偶联模型之间的模拟)进行了模拟。 (NCAR)。该项目涉及在过去的9,000年中对TRB变异性的独特视图的潜力,并对CMIP5级模型的技能进行了重要的测试,以准确再现相关的印度太平洋大气动力学。 由于TRB与热带甲烷的产生紧密相关,因此这项研究将有助于改进全新世期间区域热带甲烷通量的估计。这项研究将在本科生的广泛参与下进行,从而提供高级古气候研究和数据分析技术的经验。
项目成果
期刊论文数量(7)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Increased typhoon activity in the Pacific deep tropics driven by Little Ice Age circulation changes
- DOI:10.1038/s41561-020-00656-2
- 发表时间:2020-11-16
- 期刊:
- 影响因子:18.3
- 作者:Bramante, James F.;Ford, Murray R.;Donnelly, Jeffrey P.
- 通讯作者:Donnelly, Jeffrey P.
Decoupling of monsoon activity across the northern and southern Indo-Pacific during the Late Glacial
- DOI:10.1016/j.quascirev.2017.09.014
- 发表时间:2017-11-15
- 期刊:
- 影响因子:4
- 作者:Denniston, R. F.;Asmerom, Y.;Lucker, S.
- 通讯作者:Lucker, S.
Coupling of Indo-Pacific climate variability over the last millennium
- DOI:10.1038/s41586-020-2084-4
- 发表时间:2020-03-09
- 期刊:
- 影响因子:64.8
- 作者:Abram, Nerilie J.;Wright, Nicky M.;Heslop, David
- 通讯作者:Heslop, David
Palaeoclimate perspectives on the Indian Ocean Dipole
- DOI:10.1016/j.quascirev.2020.106302
- 发表时间:2020-06-01
- 期刊:
- 影响因子:4
- 作者:Abram, Nerilie J.;Hargreaves, Jessica A.;England, Matthew H.
- 通讯作者:England, Matthew H.
Can Australian Multiyear Droughts and Wet Spells Be Generated in the Absence of Oceanic Variability?
在没有海洋变化的情况下,澳大利亚会出现多年干旱和潮湿天气吗?
- DOI:10.1175/jcli-d-15-0694.1
- 发表时间:2016
- 期刊:
- 影响因子:4.9
- 作者:Taschetto, Andréa S.;Gupta, Alex Sen;Ummenhofer, Caroline C.;England, Matthew H.
- 通讯作者:England, Matthew H.
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Caroline Ummenhofer其他文献
Caroline Ummenhofer的其他文献
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{{ truncateString('Caroline Ummenhofer', 18)}}的其他基金
Collaborative Research: Reconstructing bottom water temperatures from bivalves on the continental shelf: Holocene history as a window to the future in the Mid- Atlantic
合作研究:重建大陆架双壳类底层水温:全新世历史是通向大西洋中部未来的窗口
- 批准号:
2202751 - 财政年份:2022
- 资助金额:
$ 9.32万 - 项目类别:
Standard Grant
Collaborative Research: P2C2--Evaluating the Origins of Multidecadal Variability in Late Holocene Indian Summer Monsoon Rainfall in Nepal
合作研究:P2C2——评估尼泊尔全新世晚期印度夏季季风降雨的多年代际变化的起源
- 批准号:
2102844 - 财政年份:2021
- 资助金额:
$ 9.32万 - 项目类别:
Standard Grant
Analyzing Weather Data from Historic Logbooks to Assess Changing Wind and Atmospheric Pressure Patterns
分析历史日志中的天气数据以评估不断变化的风和气压模式
- 批准号:
1852647 - 财政年份:2019
- 资助金额:
$ 9.32万 - 项目类别:
Standard Grant
Collaborative Research: P2C2--Bridging the Gap from Northern Iberia to Northwest Africa to Reconstruct Atmospheric Dynamics and Hydroclimate for the Last 2,500 Years
合作研究:P2C2——弥合从伊比利亚北部到非洲西北部的差距,重建过去 2,500 年的大气动力学和水文气候
- 批准号:
1804132 - 财政年份:2018
- 资助金额:
$ 9.32万 - 项目类别:
Standard Grant
PREEVENTS Track 2: Collaborative Research: Ocean Salinity as a predictor of US hydroclimate extremes
预防事件轨道 2:合作研究:海洋盐度作为美国极端水文气候的预测因子
- 批准号:
1663704 - 财政年份:2017
- 资助金额:
$ 9.32万 - 项目类别:
Continuing Grant
Collaborative Research: P2C2--Reconstructing Spatiotemporal Climatic Patterns for Northeastern Canada
合作研究:P2C2——重建加拿大东北部时空气候格局
- 批准号:
1602009 - 财政年份:2016
- 资助金额:
$ 9.32万 - 项目类别:
Standard Grant
Decadal Variability in the North Atlantic Extra-Tropics: The Role of Coupling Between Atmospheric Blocking and the Atlantic Multidecadal Oscillation
北大西洋温带地区的年代际变化:大气阻塞与大西洋数十年振荡之间的耦合作用
- 批准号:
1355339 - 财政年份:2014
- 资助金额:
$ 9.32万 - 项目类别:
Standard Grant
Collaborative Research: P2C2--Reconstructing Hydroclimatic Asian Monsoon Variability for the Past Millennium from Tree Rings: Myanmar and Vicinity
合作研究:P2C2——从树木年轮重建过去千年亚洲季风水文气候变化:缅甸及其周边地区
- 批准号:
1304245 - 财政年份:2013
- 资助金额:
$ 9.32万 - 项目类别:
Standard Grant
Collaborative Research: P2C2--Reconstructing Changes in Asian Monsoon Circulation during the Last Millennium from Stable Isotopes in Tropical Tree Rings
合作研究:P2C2——从热带树木年轮中的稳定同位素重建近千年来亚洲季风环流的变化
- 批准号:
1203704 - 财政年份:2012
- 资助金额:
$ 9.32万 - 项目类别:
Standard Grant
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