A refined mapping of Arctic lakes using Landsat imagery
A refined mapping of Arctic lakes using Landsat imagery
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DOI：
10.1080/01431161.2015.1110263
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发表时间：
2015-12-10
影响因子：
3.4
通讯作者：
Edwards, Mary
中科院分区：
文献类型：
--
作者：
Paltan, Homero;Dash, Jadu;Edwards, Mary
在区域尺度上有效绘制水体图是描述和监测水文、气候和景观过程的一项挑战。在像北极这样对气候变化敏感的地区，对湖泊覆盖的不准确描述可能导致低估了湖泊作为景观成分的作用，从而低估了它们对生物化学循环的贡献。为了可靠地估计湖泊覆盖率（也许还有其随时间的变化），科学界需要使用卫星传感器绘制水体地图的技术，这些传感器包括丰富的历史数据集，并具有足够精细的空间分辨率。在这里，我们采用了密度切片检测技术，617无云陆地卫星图像的夏季2006-2011年。我们开发了一个全面的北极湖泊数据库，检测精度为80%，并研究了湖泊分布的空间格局与景观特性。我们绘制了大约3，500，000个湖泊的地图;这些湖泊覆盖了北极陆地表面的近6%（约400，000 km（2）），并且通常很小（
Effective mapping of water bodies at regional scales is a challenge with respect to the description and monitoring of hydrological, climatic, and landscape processes. In a region as sensitive to climate change as the Arctic, inaccurate representation of lake cover has probably led to underestimation of the role of lakes as landscape constituents and thus of their contribution to biochemical cycles. To estimate lake cover reliably (and perhaps also its change through time), the scientific community necessitates techniques for mapping water bodies using satellite sensors that include rich historical data sets and have sufficiently fine spatial resolution. Here we applied a density-slicing detection technique to 617 cloud-free Landsat images for the summer months 2006-2011. We developed a comprehensive database of Arctic lakes with a detection accuracy of 80% and examined spatial patterns of lake distribution in relation to landscape properties. We mapped about 3,500,000 lakes; these cover nearly 6% of the Arctic land surface (about 400,000 km(2)) and are typically small (