• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Oceanography >Ocean-Ice Interactions in Inglefield Gulf: Early Results from NASA's Oceans Melting Greenland Mission
【24h】

Ocean-Ice Interactions in Inglefield Gulf: Early Results from NASA's Oceans Melting Greenland Mission

机译：英格尔菲尔德海湾的海冰相互作用：美国宇航局的海洋融化格陵兰任务的早期结果

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Tracy and Heilprin, marine-terminating glaciers that drain into the eastern end of Inglefield Gulf in northwest Greenland, exhibit remarkably different behaviors despite being adjacent systems. Losing mass since 1892, Tracy Glacier has dramatically accelerated, thinned, and retreated. Heilprin has retreated only slightly during the last century and has remained almost stationary in the most recent decade. Previous studies suggest that Tracy's base is deeper than Heilprin's at the calving front (over 600 m, as opposed to the 350 m depth at Heilprin), which exposes it to warmer subsurface waters, resulting in more rapid retreat. We investigate the local oceanographic conditions in Inglefield Gulf and their interactions with Tracy and Heilprin using data collected in 2016 and 2017 as part of NASA's Oceans Melting Greenland mission. Based on improved estimates of the fjord geometry and 20 temperature and salinity profiles near the fronts of these two glaciers, we find clear evidence that fjord waters are modified by ocean-ice interactions with Tracy Glacier. We find that Tracy thinned by 9.9 m near its terminus between 2016 and 2017, while Heilprin thinned by only 1.8 m. Using a simple subglacial plume model, we find that Tracy's deeper depth at the front results in a more vigorous entrainment of warm subsurface waters, leading to more rapid melting. Model results support the hypothesis that Tracy's deeper front results in faster glacier retreat, despite the presence of a shallow sill (similar to 300 m) that may prevent the warmest waters from reaching Tracy.
机译：特雷西（Tracy）和海尔普林（Hilprin）是流向格陵兰西北部英格尔菲尔德湾东端的海洋终止冰川，尽管它们是相邻的系统，但它们表现出截然不同的行为。特雷西冰川（Tracy Glacier）自1892年以来就失去了质量，它急剧地加速，变薄和后退。上个世纪以来，海尔普林仅略有退缩，在最近十年中几乎保持稳定。先前的研究表明，Tracy的底基比产犊前的海尔普林底基深（超过600 m，而Heilprin的深度为350 m），这使其暴露于更温暖的地下水域中，从而使撤退更加迅速。我们使用2016年和2017年收集的数据调查了英格菲尔德海湾的当地海洋条件及其与特雷西和海尔普林的相互作用，这是美国宇航局海洋融格陵兰任务的一部分。基于对这两个冰川前缘的峡湾几何形状和20个温度和盐度剖面的改进估计，我们发现有明确的证据表明，峡湾水域被海冰与Tracy冰川的相互作用所改变。我们发现，2016年至2017年之间，Tracy在其终点附近变薄了9.9 m，而Heilprin仅变薄了1.8 m。使用简单的冰川下羽流模型，我们发现Tracy的前部更深的深度导致温暖的地下水带入更剧烈，导致融化更加迅速。模型结果支持这样一个假说：尽管存在一个浅底坎（约300 m），可能阻止最温暖的水流进入特雷西，但特雷西的较深前缘导致冰川退缩更快。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号