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首页> 外文期刊>Journal of the American Water Resources Association >LAKE TEMPERATURE AND ICE COVER REGIMES IN THE ALASKAN SUBARCTIC AND ARCTIC: INTEGRATED MONITORING, REMOTE SENSING, AND MODELING
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LAKE TEMPERATURE AND ICE COVER REGIMES IN THE ALASKAN SUBARCTIC AND ARCTIC: INTEGRATED MONITORING, REMOTE SENSING, AND MODELING

机译：阿拉斯加次北极和北极的湖泊温度和冰盖系统：集成监测，遥感和建模

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摘要

Lake surface regimes are fundamental attributes of lake ecosystems and their interaction with the land and atmosphere. High latitudes may be particularly sensitive to climate change, however, adequate baselines for these lakes are often lacking. In this study, we couple monitoring, remote sensing, and modeling techniques to generate baseline datasets of lake surface temperature and ice cover in the Alaskan Subarctic and Arctic. No detectable trends were observed during this study period, but a number of interesting patterns were noted among lakes and between regions. The largest Arctic lake was relatively unresponsive to air temperature, while the largest Subarctic lake was very responsive likely because it is fed by glacial runoff. Mean late summer water temperatures were higher than air temperatures with differences ranging from 1.7 to 5.4℃ in Subarctic lakes and from 2.4 to 3.2℃ in Arctic lakes. The warmest mean summer water temperature in both regions was in 2004, with the exception of Subarctic glacially fed lake that was highest in 2005. Ice-out timing had high coherence within regions and years, typically occurring in late May in Subarctic and in early-July in Arctic lakes. Ice-on timing was more dependent on lake size and depth, often varying among lakes within a region. Such analyses provide an important baseline of lake surface regimes at a time when there is increasing interest in high-latitude water ecosystems and resources during an uncertain climate future.
机译：湖泊表面状况是湖泊生态系统及其与土地和大气相互作用的基本属性。高纬度可能对气候变化特别敏感，但是，这些湖泊通常缺乏足够的基线。在这项研究中，我们结合了监测，遥感和建模技术，以生成阿拉斯加亚北极和北极湖面温度和冰盖的基线数据集。在此研究期间未观察到可检测的趋势，但在湖泊之间和区域之间注意到了许多有趣的模式。最大的北极湖对气温相对没有反应，而最大的亚北极湖则非常敏感，因为它是由冰川径流给食的。夏末的平均水温高于空气温度，亚北极湖之间的差异在1.7至5.4℃之间，北极湖之间的差异在2.4至3.2℃之间。两个地区的夏季平均水温最高，都在2004年，但次冰期的冰川湖泊在2005年最高。除冰时间在各个地区和年份均具有很高的连贯性，通常发生在5月下旬的北极和早期。 7月在北极湖泊中。结冰时间更多地取决于湖泊的大小和深度，通常在一个区域内的湖泊之间会有所不同。在不确定的气候未来期间，当人们对高纬度水域生态系统和资源的兴趣日益浓厚时，此类分析提供了重要的基线。

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    C.D. Arp; B.M. Jones; M. Whitman; A. Larsen; F.E. Urban;

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    U.S. Geological Survey, Alaska Science Center, Anchorage, Alaska 99508;

    rnU.S. Geological Survey, Alaska Science Center, Anchorage, Alaska 99508 Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska 99775;

    rnBureau of Land Management, Arctic Field Office, Fairbanks, Alaska 99709;

    rnNational Park Service, Central Alaska Inventory and Monitoring Network, Fairbanks, Alaska 99709;

    rnU.S. Geological Survey, Earth Surface Processes Team, Denver, Colorado 80225;

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