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Water Challenge - a blog by Peter Brabeck-Letmathe

Offshore aquifers: global panacea or optimistic prognostication?

“The ultimate origin of water in the Earth’s hydrosphere is in the deep Earth” . This is the conclusion of an international group of researchers, including two scientists from University of Alberta:

“The earth could be a major repository for water.” It may hold as much water as all the planet's oceans combined”, these researchers believe.

Following up on a comment she posted on my blog, I invited Renee Martin-Nagle, a Visiting Scholar at the privately financed Environmental Law Institute in Washington D.C., to write a short guest post on a fascinating new topic: fossil offshore fresh groundwater reserves as a global phenomenon, based on information in a post she originally published in the International Water Law Project Blog in reaction to an article in Nature by another group of researchers.

Thanks to Renee for her views on a complex issue, and an invitation to the readers of my blog to comment from as many different angles as possible.

Drought and groundwater in the Great Plains of North America

Click to download chart (764KB)

People quickly forget when it comes to ‘extreme weather events’. This was one of the main conclusions of the 2014 Great Plains Symposium in Lincoln, Nebraska last week. Forgetting about much more severe droughts of both the near and more distant past, many politicians were quick to label the 2012-13 drought in the farming belt of US Mid-West as the worst in history and to blame climate change for it.

But as research presented at the symposium showed, drought is a normal part of the climate in the Great Plains. And in the past these droughts were much more severe than the most recent one. It should not be too difficult to find information on an at-least-as severe drought in the region in the 1950, and the even longer dry spell of the 1930s, known as the ‘Dust Bowl’ when more than 5,000 Americans died.

     

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