The volume and mean depth of Earth's lakes

被引：89

作者：

Cael, B. B. ^{[1
,2
]}

Heathcote, A. J. ^{[3
]}

Seekell, D. A. ^{[4
,5
,6
]}

机构：

[1] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA

[2] Woods Hole Oceanog Inst, Dept Phys Oceanog, Woods Hole, MA 02543 USA

[3] Sci Museum Minnesota, St Croix Watershed Res Stn, St Croix, VI USA

[4] Umea Univ, Climate Impacts Res Ctr, Abisko, Sweden

[5] Umea Univ, Dept Ecol & Environm Sci, Umea, Sweden

[6] Umea Univ, Arctic Res Ctr, Umea, Sweden

来源：

GEOPHYSICAL RESEARCH LETTERS | 2017年 / 44卷 / 01期

基金：

美国国家科学基金会;

关键词：

limnology; topograhy; scaling; volume; mean depth; SIZE-DISTRIBUTION; FRACTAL SURFACES; TOTAL PHOSPHORUS; SCALE; GEOMORPHOLOGY; PREDICTION; GEOMETRY; DATABASE; SAMPLE; AREA;

D O I：

10.1002/2016GL071378

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Global lake volume estimates are scarce, highly variable, and poorly documented. We developed a rigorous method for estimating global lake depth and volume based on the Hurst coefficient of Earth's surface, which provides a mechanistic connection between lake area and volume. Volume-area scaling based on the Hurst coefficient is accurate and consistent when applied to lake data sets spanning diverse regions. We applied these relationships to a global lake area census to estimate global lake volume and depth. The volume of Earth's lakes is 199,000km(3) (95% confidence interval 196,000-202,000km(3)). This volume is in the range of historical estimates (166,000-280,000km(3)), but the overall mean depth of 41.8m (95% CI 41.2-42.4m) is significantly lower than previous estimates (62-151m). These results highlight and constrain the relative scarcity of lake waters in the hydrosphere and have implications for the role of lakes in global biogeochemical cycles.

引用

页码：209 / 218

页数：10

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