Collaborative Research: Arctic Observing Network For Observing Transformation of the Greenland Ice Sheet Firn Layer

合作研究:观测格陵兰冰盖冰层变化的北极观测网络

基本信息

  • 批准号:
    2113392
  • 负责人:
  • 金额:
    $ 29.71万
  • 依托单位:
  • 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:
    2021-11-01 至 2026-10-31
  • 项目状态:
    未结题

项目摘要

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2)As the Arctic warms two-to-three times faster than the global average, the duration and intensity of melting is generally increasing on the surface of the Greenland ice sheet. About 90% of ice sheet is covered by compacted snow that is slowly transitioning into glacier ice. This aged and dense snow is called ‘firn’ and forms a porous layer that is many tens of meters thick. Much of the meltwater generated from the surface of the firn layer infiltrates into the underlying open pore space of the firn and refreezes. However, as this porous layer absorbs more melt it becomes warmer, denser, and filled with ice layers, which reduces its ability to absorb additional melt. Therefore, the thermal and structural transformation that Greenland's firn layer is presently undergoing has important implications for the ice sheet's capacity to retain future melt. This project is directly observing firn evolution with a network of instruments installed within the firn layer and with ice cores sampling the firn. The observational data collected by this project provides on-the-ground documentation of firn conditions needed to develop and test models and remote sensing tools for large-scale investigations of changes to the Greenland ice sheet. Future transformation of the firn layer will govern how much surface melt is retained locally on the ice sheet and how much runs off, thereby impacting hydrologic conditions of the ice sheet and surrounding regions, ocean salinity, and sea level rise.The researchers will install and maintain an observation network along a transect of the Greenland ice sheet to directly measure the state and transformation of firn properties. Repeat sampling of firn cores and instrumentation extending from the surface to 25 meters depth will yield the observational datasets needed by multiple scientific communities: firn temperature, density and ice content, densification rate, surface boundary processes (radiation, snow accumulation, temperature), and ice velocity. The network will yield 4-5 full-year records in this five-year Arctic Observing Network project. The project will provide comprehensive datasets for process-level investigations, testing climate model simulations of firn processes, and interpreting satellite-based measurement of surface elevation change. The project will engage and support a relatively large number of undergraduate and graduate students at R2 institutions with field research experiences and real-world classroom learning. Outreach activities will target three groups poorly represented in cryospheric science: 1) local and Indigenous residents of Greenland; 2) American Indian undergraduate students; and 3) economically disadvantaged school children.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.
该奖项是根据2021年《美国救援计划法》(公法117-2)全部或部分资助的,因为北极的暖度比全球平均水平快两到三倍,在格陵兰冰盖表面上,熔化的持续时间和融化的持续时间和强度通常在增加。约90%的冰盖被压实的雪覆盖,该雪逐渐逐渐过渡到冰川冰。这种老化和致密的积雪称为“ firn”,形成了一个多孔层,厚度为数十米。从FIR层的表面产生的大部分融合水渗入了FIR的基础开放孔隙空间和重新冷冻。但是,随着该多孔层吸收更多的熔体,它变得更温暖,浓密,并充满了冰层,从而降低了其吸收额外熔体的能力。因此,呈现Greenland的FIR层的热和结构转化对冰盖保留未来熔体的能力具有重要意义。该项目直接观察了FIR演化,该仪器网络安装在FIR层中,而ICE内核进行了第一个采样。该项目收集的观察数据提供了开发和测试模型和遥感工具所需的第一个条件的现场文档,以大规模研究格陵兰冰盖的变化。 FIR层的未来转换将控制冰盖上局部保留多少表面熔体,以及多少流量,从而影响冰盖及周边地区的水文条件,海洋盐度以及海平面上升。研究人员将沿着绿地冰台的横向安装和维护一个观测网络,以直接测量火柴的状态和火焰的状态。重复对FIR内核和仪器从表面延伸到25米的仪器将产生多个科学社区所需的观察数据集:首先,该项目将在这个五年的北极观测网络项目中产生4-5个全年记录。该项目将提供全面的数据集,用于过程级别的研究,测试FIRN过程的气候模型模拟以及解释基于卫星的表面高度变化的测量。该项目将在R2机构的实地研究经验和现实世界的课堂学习中吸引并支持相对较大的本科生和研究生。外展活动将针对Cryosphere Science代表不佳的三个群体:1)格陵兰的地方和土著居民; 2)美洲印第安人本科生; 3)在经济上处于弱势群体的儿童。该奖项反映了NSF的法定任务,并被认为是通过基金会的知识分子优点和更广泛的影响审查标准来评估值得支持的。

项目成果

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Neil Humphrey其他文献

Uptake and Transfer of Heat Within the Firn Layer of Greenland Ice Sheet's Percolation Zone
格陵兰冰原渗滤带第一层的热量吸收和传递
With a Little Help from My Friends: Profiles of Perceived Social Support and Their Associations with Adolescent Mental Health
在我朋友的帮助下:感知的社会支持及其与青少年心理健康的关系
  • DOI:
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    2.1
  • 作者:
    Kimberly J. Petersen;Pamela Qualter;Neil Humphrey;M. T. Damsgaard;K. R. Madsen
  • 通讯作者:
    K. R. Madsen
Variation in global network properties across risk factors for adolescent internalizing symptoms: evidence of cumulative effects on structure and connectivity.
青少年内化症状的风险因素中全球网络特性的变化:对结构和连接性累积影响的证据。
  • DOI:
    10.1017/s0033291723002362
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    6.9
  • 作者:
    Louise Black;Reihaneh Farzinnia;Neil Humphrey;Jose Marquez
  • 通讯作者:
    Jose Marquez
Implementing targeted social and emotional learning interventions in schools—Are more specific models needed?
在学校实施有针对性的社交和情感学习干预措施——是否需要更具体的模型?
Prevalence, Inequalities, and Impact of Bullying in Adolescence: Insights from the #BeeWell Study
青春期欺凌的普遍性、不平等和影响:来自

Neil Humphrey的其他文献

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{{ truncateString('Neil Humphrey', 18)}}的其他基金

Collaborative Research: Quantifying Heat/Mass Structure and Fluxes Through the Full Thickness of Greenland?s Percolation Zone
合作研究:量化格陵兰岛渗透区全层的热/质结构和通量
  • 批准号:
    1717939
  • 财政年份:
    2017
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Standard Grant
Collaborative Research: In Situ Borehole Measurements To Partition The Velocity Of The Greenland Ice Sheet Into Ice Deformation And Basal Sliding Components
合作研究:现场钻孔测量将格陵兰冰盖的速度划分为冰变形和基底滑动分量
  • 批准号:
    1203451
  • 财政年份:
    2012
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Standard Grant
Collaborative Research: Greenland Ice Sheet Basal Hydrology and Sliding Dynamics. The Proof of the Drill
合作研究:格陵兰冰盖基础水文学和滑动动力学。
  • 批准号:
    0909122
  • 财政年份:
    2009
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Standard Grant
Inclusion of Pupils with Autistic Spectrum Disorders in Mainstream Secondary Schools - Challenges and Opportunities
让自闭症谱系障碍学生融入主流中学 - 挑战与机遇
  • 批准号:
    ES/F000731/1
  • 财政年份:
    2008
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Research Grant
Collaborative Research: A field validated model for melt water infiltration and runoff from the Greenland Icesheet
合作研究:格陵兰冰盖融水渗透和径流的现场验证模型
  • 批准号:
    0612374
  • 财政年份:
    2006
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Standard Grant
Collaborative Research: Water Storage and Routing Within Glaciers via Planar Voids, a New Model of Glacier Hydrology
合作研究:通过平面空隙的冰川内水储存和路径,冰川水文学的新模型
  • 批准号:
    0454863
  • 财政年份:
    2005
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Standard Grant
Collaborative Research: Geomorphic-Geodynamic Coupling at the Orogen Scale: A Himalayan Transect in Central Nepal
合作研究:造山带尺度的地貌-地球动力耦合:尼泊尔中部喜马拉雅断面
  • 批准号:
    9909382
  • 财政年份:
    2000
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Continuing Grant
Collabortiave Research: Ice-Core Analysis and Physical Glaciology of the Galena Creek Rock Glacier, Wyoming
合作研究:怀俄明州方铅矿溪岩石冰川的冰芯分析和物理冰川学
  • 批准号:
    9710061
  • 财政年份:
    1997
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Continuing Grant
Collaborative Research: Direct Measurement of the In-situ Stress Tensor at Depth in Glacier Ice
合作研究:直接测量冰川冰深处的原位应力张量
  • 批准号:
    9531565
  • 财政年份:
    1996
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Continuing Grant
Bering Glacier Surge, Monitoring by Hydrologic Observations
白令冰川激增,水文观测监测
  • 批准号:
    9319698
  • 财政年份:
    1993
  • 资助金额:
    $ 29.71万
  • 项目类别:
    Standard Grant

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合作研究:阿拉斯加北极沿海地区陆地冰冻期间的物理反馈
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