Collaborative Research: Arctic Hydrological Regime Shift in a Warming Climate

合作研究:气候变暖下的北极水文状况变化

基本信息

  • 批准号:
    1744515
  • 负责人:
  • 金额:
    $ 50.21万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2018
  • 资助国家:
    美国
  • 起止时间:
    2018-06-01 至 2023-05-31
  • 项目状态:
    已结题

项目摘要

The Arctic is currently warming faster than any other region of the globe, and recent changes in climate and hydrology have had direct impacts in Svalbard, where flash flooding and enhanced mass movement over frozen ground on steep slopes has occasionally led to catastrophic slope failure. This study will examine how warming is leading to a new hydrological regime in regions adjacent to the areas where major sea-ice losses have occurred. The new hydrological regime is result of an increase in annual precipitation, a higher proportion of which is in the form of rain rather than snow, especially in the transition seasons of fall and spring. Under this collaborative project, the team will study annually laminated sediments in lakes of western Svalbard (Norwegian Arctic) to identify the sedimentary signal of recent changes in hydrology and use this to reconstruct the long-term history of rainfall-related sedimentary events to determine when similar conditions may have prevailed in the past. This project will involve a postdoctoral scientist, a graduate student, and undergraduate students at University of Massachusetts and Bates College, as well as teacher in the research. There is training of STEM teachers through a summer program enabling them to incorporate Arctic earth science activities into their classroom curricula. This project will examine how warming is leading to a new hydrological regime in regions adjacent to the areas where major sea-ice losses have occurred. The investigators will study annually laminated sediments in lakes of western Svalbard to identify the sedimentary signal of recent changes in hydrology and reconstruct the long-term history of rainfall-related sedimentary events to determine when similar conditions may have prevailed in the past. The type and amount of sediment transported to lakes carries with it information about meteorological and hydrological conditions in the lake watershed. The investigators will recover sediment cores to study the structure and grain size profiles of recent years of sediment accumulation, to compare with meteorological measurements, sediment recovered in traps, and measurements of processes responsible for sediment transport and deposition. They will employ microanalytcal techniques for high-resolution grain size analysis, varve detection and measurement. Using scanning electron microscope image analysis methods, they will reconstruct rainfall-driven sedimentary events. Sediments acquired from sediment traps will be analyzed using a laser particle size analyzer to obtain sub-annual scale grain size profiles to compare with observed hydroclimatic events and the varved records. This will provide a unique perspective on the nature of recent sedimentary changes and provide insight into the effects of contemporary changes in climate on the hydrological regime of this region. The results will have implications for other parts of the Arctic where sea-ice is rapidly receding.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.
北极目前的变暖速度比地球仪上任何其他地区都快,最近的气候和水文变化对斯瓦尔巴特群岛产生了直接影响,那里的山洪暴发和陡坡冻土上的物质运动加剧,有时会导致灾难性的边坡崩塌。这项研究将探讨气候变暖如何导致海冰大量减少地区的邻近地区出现新的水文状况。新的水文状况是年降水量增加的结果,其中更大比例是雨而不是雪,特别是在秋季和春季的过渡季节。在这一合作项目下,该团队将每年研究斯瓦尔巴群岛西部湖泊(挪威北极地区)的层状沉积物,以确定近期水文变化的沉积信号,并利用这一信号重建与冰川有关的沉积事件的长期历史,以确定过去类似条件可能存在的时间。该项目将涉及一名博士后科学家,一名研究生,以及马萨诸塞州大学和贝茨学院的本科生,以及参与研究的教师。通过暑期项目对STEM教师进行培训,使他们能够将北极地球科学活动纳入课堂课程。该项目将研究气候变暖如何导致海冰大量减少地区的邻近地区出现新的水文状况。研究人员将每年研究斯瓦尔巴群岛西部湖泊中的层状沉积物,以确定近期水文变化的沉积信号,并重建与冰川相关的沉积事件的长期历史,以确定过去类似的条件可能在何时普遍存在。输往湖泊的沉积物的类型和数量携带着湖泊流域气象和水文条件的信息。调查人员将采集沉积物岩心,研究近年来沉积物积累的结构和粒度分布,与气象测量结果、捕获器中采集的沉积物以及沉积物迁移和沉积过程的测量结果进行比较。他们将采用微分析技术进行高分辨率粒度分析、纹层探测和测量。利用扫描电子显微镜图像分析方法,他们将重建火山驱动的沉积事件。将使用激光粒度分析仪分析从沉积物收集器获得的沉积物,以获得次年度尺度的粒度分布图,与观测到的水文气候事件和变化记录进行比较。这将为最近沉积变化的性质提供独特的视角,并深入了解当代气候变化对该地区水文状况的影响。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

期刊论文数量(5)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Chronology and sedimentology of a new 2.9 ka annually laminated record from South Sawtooth Lake, Ellesmere Island
埃尔斯米尔岛南锯齿湖新的 2.9 ka 年层压记录的年代学和沉积学
  • DOI:
    10.1016/j.quascirev.2019.105875
  • 发表时间:
    2019
  • 期刊:
  • 影响因子:
    4
  • 作者:
    Lapointe, Francois;Francus, Pierre;Stoner, Joseph S.;Abbott, Mark B.;Balascio, Nicholas L.;Cook, Timothty L.;Bradley, Raymond S.;Forman, Steven L.;Besonen, Mark;St-Onge, Guillaume
  • 通讯作者:
    St-Onge, Guillaume
Environmental Monitoring in the Kapp Linne-Gronfjorden Region (KLEO)
卡普林讷-格伦峡湾地区 (KLEO) 的环境监测
  • DOI:
  • 发表时间:
    2019
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Retelle, Michael;Christiansen, Hanne;Hodson, Andy;Nikulina, Anna;Osuch, Marzena;Poleshuk, Ksenia;Romashova, Kseniia;Roof, Steve;Rouyet, Line;Strand, Sarah Marie
  • 通讯作者:
    Strand, Sarah Marie
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Raymond Bradley其他文献

The Island of Amsterdamøya: A key site for studying past climate in the Arctic Archipelago of Svalbard
  • DOI:
    10.1016/j.quascirev.2017.11.005
  • 发表时间:
    2018-03-01
  • 期刊:
  • 影响因子:
  • 作者:
    Jostein Bakke;Nicholas Balascio;Willem G.M. van der Bilt;Raymond Bradley;William J. D' Andrea;Marthe Gjerde;Sædís Ólafsdóttir;Torgeir Røthe;Greg De Wet
  • 通讯作者:
    Greg De Wet

Raymond Bradley的其他文献

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{{ truncateString('Raymond Bradley', 18)}}的其他基金

EAGER: Dating Arctic Lake Sediments with Beryllium-10 Markers of Solar Proton Events
EAGER:利用太阳质子事件的铍 10 标记测定北极湖沉积物的年代
  • 批准号:
    2404514
  • 财政年份:
    2024
  • 资助金额:
    $ 50.21万
  • 项目类别:
    Standard Grant
Climate and Cryosphere International Project Office of the World Climate Research Program
世界气候研究计划气候与冰冻圈国际项目办公室
  • 批准号:
    2213875
  • 财政年份:
    2022
  • 资助金额:
    $ 50.21万
  • 项目类别:
    Continuing Grant
NSFGEO-NERC: Collaborative Research: Environmental change and impacts on ancient human colonization of Peary Land, northernmost Greenland
NSFGEO-NERC:合作研究:环境变化及其对格陵兰岛最北端皮里地古代人类殖民的影响
  • 批准号:
    2125994
  • 财政年份:
    2021
  • 资助金额:
    $ 50.21万
  • 项目类别:
    Continuing Grant
Collaborative Research: The Use of Biological Markers to Reconstruct Human-Environment Interaction
合作研究:利用生物标记重建人类与环境的相互作用
  • 批准号:
    1623627
  • 财政年份:
    2016
  • 资助金额:
    $ 50.21万
  • 项目类别:
    Standard Grant
Reconstruction of climate at the Norse Settlements of Greenland over the last two millennia using organic biomarkers in lake sediments
利用湖泊沉积物中的有机生物标志物重建格陵兰岛北欧定居点过去两千年的气候
  • 批准号:
    1602973
  • 财政年份:
    2016
  • 资助金额:
    $ 50.21万
  • 项目类别:
    Standard Grant
Doctoral Dissertation Research: Reconstruction of Environmental Conditions and Human Occupancy Associated with Semi-Polar Settlements
博士论文研究:与半极聚落相关的环境条件和人类居住重建
  • 批准号:
    1536383
  • 财政年份:
    2015
  • 资助金额:
    $ 50.21万
  • 项目类别:
    Standard Grant
Collaborative Research: Nonlinearities in the Arctic climate system during the Holocene
合作研究:全新世北极气候系统的非线性
  • 批准号:
    0909354
  • 财政年份:
    2010
  • 资助金额:
    $ 50.21万
  • 项目类别:
    Standard Grant
Collaborative Research: Volcanism in the Arctic System (VAST): geochronology and climate impacts
合作研究:北极系统火山活动(VAST):地质年代学和气候影响
  • 批准号:
    0714014
  • 财政年份:
    2007
  • 资助金额:
    $ 50.21万
  • 项目类别:
    Standard Grant
Collaborative research: a synthesis of the last 2000 years of climatic variability from Arctic lakes
合作研究:北极湖泊过去 2000 年气候变化的综合
  • 批准号:
    0454959
  • 财政年份:
    2005
  • 资助金额:
    $ 50.21万
  • 项目类别:
    Continuing Grant
High-Resolution Studies of High Arctic Paleoclimate from Varved Lake Sediments
Varved 湖沉积物对北极高纬度古气候的高分辨率研究
  • 批准号:
    0402421
  • 财政年份:
    2004
  • 资助金额:
    $ 50.21万
  • 项目类别:
    Standard Grant

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