...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Conceptualizing delta forms and processes in Arctic coastal environments
【24h】

Conceptualizing delta forms and processes in Arctic coastal environments

机译：概念化的三角洲形式和过程在北极沿海环境中

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

Climate warming in the Arctic directly causes two opposite changes in Arctic coastal systems: increased melt-water discharge through rivers induces extra influx of sediments and extended open water season increases wave impact which reworks and erodes the shores. A shoreline change analysis along the southern coast of Disko Island in western Greenland was conducted with aerial photographs and satellite images from 1964, 1985, and 2012. The decadal morphologic evolution of this 85km section showed that large parts of the coast had undergone very limited changes. However, two deltas were highly dynamic and popped up as hotspots. The Tuapaat delta and Skansen delta showed large progradation rates (1.5 and 7m/yr) and migration of the adjacent barriers and spits. The dynamic behavior at the delta mouths was mainly caused by classic delta channel lobe switching at one delta (Tuapaat), and by a breach of the fringing spit at the other delta (Skansen). The longshore and cross-shore transports are responsible for reworking the sediment with a result of migrating delta mouths and adjacent subaqueous mouth bars. Seaward progradation of the deltas is limited due to the steep nature of the bathymetry in Disko Bay. Finally, a schematic conceptual overview of processes and associated morphological responses for deltas in Arctic environments is presented, including the climate drivers affecting delta evolution. Copyright (c) 2016 John Wiley & Sons, Ltd.
机译：北极的气候变暖直接导致北极沿海系统的两个相反的变化：通过河流提高熔体排放诱导沉积物涌入，延长的开放水季节增加了返工的波浪冲击并侵蚀海岸的波浪冲击。格陵兰岛南部海岸的海岸线改变分析是由1964年，1985年和2012年的航空照片和卫星图像进行的。这部分85公里的剖面性的形态学演变表明，沿岸的大部分地区发生了很有限的变化。然而，两个Δ是高度动态的，并突然爆发为热点。 Tuapaat Delta和Skansen Delta显示出大型促进速率（1.5和7m / yr），并迁移相邻的障碍和吐痰。 Delta嘴的动态行为主要由经典的Delta通道叶片切换在一个三角洲（TuaPaat），以及在其他三角洲（Skansen）的违反流苏吐痰。龙岸和跨岸运输负责重新加工沉积物，其迁移δ嘴和邻近的水嘴杆。由于Disko Bay的沐浴般的陡峭本质，Deltas对Deltas的海面促成。最后，提出了北极环境中的饮水中的过程和相关形态反应的示意性概念概述，包括影响δ进化的气候司机。版权所有（c）2016 John Wiley＆Sons，Ltd。

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