期刊
GEOMORPHOLOGY
卷 225, 期 -, 页码 69-75出版社
ELSEVIER
DOI: 10.1016/j.geomorph.2014.03.049
关键词
Permafrost; Bioindicators; Snow cover; Ground surface cooling; Fildes Peninsula; Antarctica
资金
- FCT-CAPES Project [290/11]
- project PERMANTAR-2 (FCT/Portugal) [PTDC/AAC-CLI/098885/2008]
- project SNOWCHANGE (PROPOLAR/FCT - Portugal)
- INACH - Chile
Usnea sp. formations show a spatial distribution coinciding with wind-exposed locations on rock knobs or sedimentary bodies, while they are commonly absent from concave sites. Field collection of georeferenced ground truthing data in the Meseta Norte (Fildes Peninsula, Maritime Antarctica) and the application of supervised classification techniques over a summer high resolution QuickBird satellite scene showed excellent classification accuracy for the different landcover types. The results show that Usnea formation distribution maps are a viable proxy for areas with less snow during the cold season. Such an approach provides input for permafrost and active layer modelling since snow acts as a critical control on ground surface heat balance. Since snow mapping is extremely difficult in Maritime Antarctica our tested approach provides important added-value for empirical-statistical modelling of permafrost distribution. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据