What is the volume of water in lakes on Earth? Using a mathematical analysis, researcher David Seekell, at Umeå University, and his American collaborators now suggest that the mean depth of lakes is 30 per cent lower than previously estimated. Shallower lakes implies less fresh water and has consequences for our understanding of climate change and the carbon cycle. The results have been published in Geophysical Research Letters.
What is the volume of water in lakes on Earth? Using a mathematical analysis, researcher David Seekell, at Umeå University, and his American collaborators now suggest that the mean depth of lakes is 30 per cent lower than previously estimated. Shallower lakes implies less fresh water and has consequences for our understanding of climate change and the carbon cycle. The results have been published in Geophysical Research Letters.
“Our estimations measure around 190,000 km3, which is a very small amount of water. In comparison, the ocean contains 1.3 billion km3 of water. If we poured the water of all lakes on Earth together into one big lake, the mean depth of the lake would be 42 metres. The mean depth of the ocean is 3,682 metres,” says David Seekell, associate professor at the Department of Ecology and Environmental Sciences and the Climate Impacts Research Centre (CIRC) at Umeå University in Sweden.
A possible conclusion is if lakes are shallower, they release more methane into the atmosphere than previously estimated.
Read more at Umea University
Image: Mapping a lake by GPS positioning and depth sounder by boat is very time-consuming, therefore the researchers decided to use a theory driven approach in the study. (Photo: David Seekell)
