For several days this month, Greenland's surface ice cover melted over a larger area than at any time in more than 30 years of satellite observations. Nearly the entire ice cover of Greenland, from its thin, low-lying coastal edges to its two-mile-thick center, experienced some degree of melting at its surface, according to measurements from three independent satellites analyzed by NASA and unive ... read more >>
This paper is my attempt to provide a historical background for the science of hydrogeology. I have tried to keep it reasonably short so that busy students might still find the time to read it. I have also included short excerpts from some of the articles so that the reader might taste the flavor of the writing. Most of the excerpts are translations so that we are dependent upon the translator t ... read more >>
The increasingly detailed and immediate pictures that we get of vast movements of ice at the Earth's poles make for a dramatic sight. But whether that drama is cause for worry is an open question. Floating "tongues" of ice, like the one that has broken off the Petermann glacier reported on Thursday, extend beyond the glaciers, and are constantly fed by ice pouring off the ice sheet. Eventually pa ... read more >>
A recent email I sent to a group of hydrogeologists and fellow travelers reiterated my desire to establish an online community for groundwater and IWRM. I am still working towards that and am searching for a suitable platform. Over 100 people have indicated they would like to be included.
The email elicited a number of responses and a few relevant publications. Here I have posted five publicat ... read more >>
A new paper in the journal Nature Climate Change assesses which human factors are the most important drivers of greenhouse gas emissions.
The authors note know that for every 1 percent increase in human population, greenhouse gas emissions go up by slightly more than 1 percent. But which aspects of human life contribute most—more people, more consumption, or both—and how might that play out in ... read more >>
Hard lessons from around the American West and Australia could help improve groundwater management and protect ecosystems in California, Stanford researchers find. ... read more >>
There is little doubt that natural gas, which is plentiful and cleaner than coal, could help with the country’s energy and climate problems. But as Interior Secretary Ken Salazar once warned, the drilling technique known as hydraulic fracturing could be natural gas’s Achilles’ heel unless the public can be sure it will not pollute water supplies or the air.
Hydraulic fracturing, combined with de ... read more >>
The nation's food supply may be vulnerable to rapid groundwater depletion from irrigated agriculture, according to a new study by researchers at The University of Texas at Austin and elsewhere. ... read more >>
The nation's food supply may be vulnerable to rapid groundwater depletion from irrigated agriculture, according to a new study by researchers at The University of Texas at Austin and elsewhere. The study, which appears in the journal Proceedings of the National Academy of Sciences, paints the highest resolution picture yet of how groundwater depletion varies across space and time in California's ... read more >>
Effect of groundwater use: Using water from wells leads to sea level rise, cancels out effect of dams
As people pump groundwater for irrigation, drinking water, and industrial uses, the water doesn't just seep back into the ground -- it also evaporates into the atmosphere, or runs off into rivers and canals, eventually emptying into the world's oceans. This water adds up, and a new study calculates that by 2050, groundwater pumping will cause a global sea level rise of about 0.8 millimeters per y ... read more >>