The Lake Hazen watershed as a sentinel of Arctic environmental change

哈森湖流域是北极环境变化的哨兵

基本信息

  • 批准号:
    RGPIN-2014-04365
  • 负责人:
  • 金额:
    $ 2.62万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Discovery Grants Program - Individual
  • 财政年份:
    2018
  • 资助国家:
    加拿大
  • 起止时间:
    2018-01-01 至 2019-12-31
  • 项目状态:
    已结题

项目摘要

Current climate change models predict that in the Canadian high Arctic, temperatures will rise 3-5°C over most land areas by 2100, but up to 9°C in the very northern Canadian Arctic Archipelago. At the same time, mean annual precipitation is predicted to increase ~12% for the Arctic, but up to 35% in regions with the highest warming. Such warming and wetting is anticipated to greatly alter the energy balance of Arctic landscapes, resulting in melting of glaciers, permafrost thaw, longer growing seasons and increased plant production on landscapes and in freshwaters. In fact, not only are these changes anticipated, but most are already occurring in Quttinirpaaq National Park (QNP; northern Ellesmere Island, Nunavut), Canada's most northerly National Park. Situated in the middle of QNP is Lake Hazen, the world's largest lake by volume north of the Arctic Circle. It supports one of the largest stocks of landlocked Arctic char, which has been historically harvested by Inuit, Thule and Paleo-Eskimo peoples. Lake Hazen is 540 km2 in surface area and 265 m deep, and has a 8400 km2 watershed that is half glaciated. Satellite observations of the watershed have revealed 2006-2012 summer glacier surface temperatures up to 1.3°C warmer than during 2000-2005, and a decline in ice cover duration on Lake Hazen. This has resulted in recent 10-fold increases in glacial meltwater and sediment inputs into Lake Hazen. Despite these recent and significant changes in the watershed, we know very little about how they are impacting water quality and metabolism in Lake Hazen itself, a freshwater jewel of Canada's high Arctic. Will these landscape changes lead to a cascade of effects that will not only impact the normal metabolic functioning of Lake Hazen (e.g., algal production, sediment microbial respiration), but also degrade ecosystem services of socio-economic significance? I am proposing an integrated whole-ecosystem approach to quantifying impacts of climate change on high Arctic watersheds, using the Lake Hazen watershed as a sentinel system. There are three overarching objectives to my proposed research. My first objective is to quantify how the net energy balance of the Lake Hazen watershed is changing and how that is impacting both physical (e.g., the extent of permafrost thaw) and biological (e.g., plant production) processes occurring there. The second objective of my research program is to quantify inputs of organic carbon, nutrients and other chemical parameters including legacy contaminants (e.g., mercury, perfluorinated acids) to Lake Hazen from snowmelt, glacial melt and permafrost thaw. Finally, I am proposing to quantify how these inputs of organic carbon, nutrients and other chemical parameters are impacting metabolic processes like algal production and sediment microbial respiration, as well as basic water quality, in Lake Hazen. From a scientific basis, my team's research will: 1) provide much-needed baseline data in Canada's most understudied yet most changing ecoregion, from which all future data can be benchmarked; 2) assist modelers in predicting broader changes across the high Arctic; and 3) provide ground-truthing for remote sensors and satellite imagery. From the more applied and socio-economic perspective, increasing our ability to predict impacts of warming northern ecosystems on watershed productivity and water quality is vital for securing food, clean drinking water and traditional lifestyles for Northern peoples, as well as for sustainable resource development. All funding will go directly towards the training of highly qualified personnel, including northern training, consultation and outreach.
目前的气候变化模型预测,在加拿大北极高地,到2100年,大部分陆地地区的气温将上升3-5摄氏度,但在加拿大北极群岛最北部,气温将上升9摄氏度。与此同时,北极的年平均降水量预计将增加约12%,但在变暖最严重的地区最高可增加35%。这种变暖和变湿预计将极大地改变北极地貌的能量平衡,导致冰川融化、永久冻土融化、更长的生长季和增加地貌和淡水的植物产量。事实上,不仅这些变化在预料之中,而且大多数变化已经发生在加拿大最北端的国家公园库蒂尼尔帕克国家公园(QNP;努纳武特埃尔斯米尔岛北部)。位于北冰洋中部的是哈森湖,这是世界上体积最大的湖泊,位于北极圈以北。它支持内陆北极炭的最大储量之一,历史上因纽特人、图勒人和古爱斯基摩人一直在收获北极炭。黑森湖面积540平方公里,水深265米,有一个8400平方公里的半冰川流域。对该分水岭的卫星观测显示,2006-2012年夏季冰川表面温度比2000-2005年高出1.3摄氏度,哈森湖的冰盖持续时间缩短。这导致最近输入到哈森湖的冰川融水和沉积物增加了10倍。尽管分水岭最近发生了这些重大变化,但我们对它们如何影响哈森湖的水质和新陈湖本身知之甚少。哈森湖是加拿大北极高原的一颗淡水明珠。这些景观变化是否会导致一系列影响,不仅会影响哈森湖的正常新陈代谢功能(例如,藻类生产、沉积物微生物呼吸),而且还会降低具有社会经济意义的生态系统服务?我正在提出一种综合的全生态系统方法,以哈森湖流域为哨兵系统,量化气候变化对北极高地分水岭的影响。我提出的研究有三个主要目标。我的第一个目标是量化哈森湖流域的净能量平衡是如何变化的,以及这如何影响在那里发生的物理(例如,永久冻土融化的程度)和生物(例如,植物生产)过程。我的研究计划的第二个目标是量化有机碳、营养物质和其他化学参数的输入,包括从积雪融化、冰川融化和永久冻土融化到哈森湖的遗留污染物(例如汞、全氟酸)。最后,我建议量化这些有机碳、营养物质和其他化学参数的输入如何影响哈森湖的新陈代谢过程,如藻类生产和沉积物微生物呼吸,以及基本水质。在科学基础上,我的团队的研究将:1)在加拿大研究最少但变化最大的生态区提供急需的基线数据,未来所有数据都可以作为基准;2)协助建模人员预测整个北极高地的更广泛变化;3)为遥感传感器和卫星图像提供地面真实情况。从更实用和更社会经济的角度来看,提高我们预测北方生态系统变暖对流域生产力和水质的影响的能力,对于确保北方人民的食物、清洁饮用水和传统生活方式以及可持续资源开发至关重要。所有资金将直接用于培训高素质人员,包括北方培训、咨询和外联。

项目成果

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StLouis, Vincent其他文献

StLouis, Vincent的其他文献

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{{ truncateString('StLouis, Vincent', 18)}}的其他基金

The impacts of rapidly receding glaciers on proglacial freshwater resources and ecological services
冰川快速消退对冰前淡水资源和生态服务的影响
  • 批准号:
    RGPIN-2019-04272
  • 财政年份:
    2022
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Individual
The impacts of rapidly receding glaciers on proglacial freshwater resources and ecological services
冰川快速消退对冰前淡水资源和生态服务的影响
  • 批准号:
    RGPIN-2019-04272
  • 财政年份:
    2021
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Individual
The impacts of rapidly receding glaciers on proglacial freshwater resources and ecological services
冰川快速消退对冰前淡水资源和生态服务的影响
  • 批准号:
    RGPIN-2019-04272
  • 财政年份:
    2020
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Individual
The impacts of rapidly receding glaciers on proglacial freshwater resources and ecological services
冰川快速消退对冰前淡水资源和生态服务的影响
  • 批准号:
    RGPIN-2019-04272
  • 财政年份:
    2019
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Individual
The Lake Hazen watershed as a sentinal of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    305414-2014
  • 财政年份:
    2018
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Northern Research Supplement
The Lake Hazen watershed as a sentinel of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    RGPIN-2014-04365
  • 财政年份:
    2017
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Individual
The Lake Hazen watershed as a sentinal of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    305414-2014
  • 财政年份:
    2017
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Northern Research Supplement
The Lake Hazen watershed as a sentinel of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    RGPIN-2014-04365
  • 财政年份:
    2016
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Individual
The Lake Hazen watershed as a sentinal of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    305414-2014
  • 财政年份:
    2016
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Northern Research Supplement
The Lake Hazen watershed as a sentinal of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    305414-2014
  • 财政年份:
    2015
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Northern Research Supplement

相似海外基金

The Lake Hazen watershed as a sentinal of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    305414-2014
  • 财政年份:
    2018
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Northern Research Supplement
The Lake Hazen watershed as a sentinel of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    RGPIN-2014-04365
  • 财政年份:
    2017
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Individual
The Lake Hazen watershed as a sentinal of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    305414-2014
  • 财政年份:
    2017
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Northern Research Supplement
The Lake Hazen watershed as a sentinel of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    497094-2016
  • 财政年份:
    2016
  • 资助金额:
    $ 2.62万
  • 项目类别:
    University Undergraduate Student Research Awards
The Lake Hazen watershed as a sentinel of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    RGPIN-2014-04365
  • 财政年份:
    2016
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Individual
The Lake Hazen watershed as a sentinal of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    305414-2014
  • 财政年份:
    2016
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Northern Research Supplement
The Lake Hazen watershed as a sentinal of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    305414-2014
  • 财政年份:
    2015
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Northern Research Supplement
The Lake Hazen watershed as a sentinel of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    RGPIN-2014-04365
  • 财政年份:
    2015
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Individual
The Lake Hazen watershed as a sentinel of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    467232-2014
  • 财政年份:
    2014
  • 资助金额:
    $ 2.62万
  • 项目类别:
    University Undergraduate Student Research Awards
The Lake Hazen watershed as a sentinal of Arctic environmental change
哈森湖流域是北极环境变化的哨兵
  • 批准号:
    305414-2014
  • 财政年份:
    2014
  • 资助金额:
    $ 2.62万
  • 项目类别:
    Discovery Grants Program - Northern Research Supplement
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