C2 and C3 DESCRIPTION:

Documented lake volumes were identified for 87 out of the total natural 6 392 georeferenced lakes with known area (ESRI 1995; Lerman et al. 1995) as developed in Green et al. (2004). The small number of known lake volumes actually corresponds to approximately 90% of the total volume of global fresh water lakes since the largest lakes (Baikal, Tanganyika, North American Great Lakes, Victoria) are well documented. For the remaining lakes lacking documented volume information, average lake depth was estimated as a function of lake area class (ESRI 1995) depending on glacial or tectonic origin (Meybeck 1995). Lake volume was calculated as the product of estimated lake depth and surface area.

DOWNLOADABLE FILES:

(C2) Lake _density.asc = density of lakes (% of grid cell area) for each 30-min (latXlon) grid cell. Primary source: ESRI (1995).

(C3) Lake_volume.asc = total water storage in lakes (km3 per grid cell). Primary source: Green et al. (2004).

REFERENCES:

Environmental Systems Research Institute, Inc. (ESRI) 1995. Arc World Supplement, 1:3 M scale digital map. Environmental Systems Research Institute, Inc., Redlands, CA.

Green, P., C. J. Vörösmarty, M. Meybeck, J. Galloway, and B.J. Peterson. 2004. Pre-industrial and contemporary fluxes of nitrogen through rivers: A global assessment based on typology. Biogeochemistry 68: 71-105.

Lerman A., Imboden D.M. and Gat J.R. 1995. Physics and Chemistry of Lakes. Springer-Verlag, Berlin and Heidelberg GmbH and Co. KG.

Meybeck M. 1995. Global distribution of lakes. In: Lerman A. (ed) Physics and Chemistry of Lakes. Springer-Verlag, Berlin and Heidelberg GmbH and Co. KG.

Additional Links:

Global Lakes and Wetlands Database (GLWD)