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24 February 2017
Everyone (in California, at least) has seen those clips that get run every winter of the snow surveys: people walking out into a white-blanketed meadow to shove a pole into the snow and record the depth. Or, in the case of the 2015 broadcast, walking out onto muddy grass and gesturing sadly at a lack of snow in which to do this. It’s a good photo op, but the broadcasts rarely follow up with much of the science behind the survey.
9 January 2017
Post by WaterUnderground contributor Mikhail Smilovic. Mikhail is a PhD candidate in the Department of Civil Engineering at McGill University, in Quebec. Crops use water for photosynthesis, absorbing nutrients, and transpiration, or the plant-equivalent of sweating. A crop may experience water-stress if the soil surrounding the roots is not adequately wet, and this stress will affect the crop differently depending on the crop’s stage of growth. Irrigation is the watering of …
15 December 2016
Researchers have discovered a large concentration of sediment deposits at the end of Monterey Canyon, an underwater chasm beneath Monterey Bay, California. The sediment deposits are relatively young and may be more likely to catalyze underwater landslides than other sections of the canyon, according to the researchers who presented their discovery at the 2016 American Geophysical Union Fall Meeting.
30 November 2016
Permafrost loss due to a warming Alaska is leading to changes in the chemistry of the Yukon River Basin with potential global climate implications. This is the first time a Yukon River study has been able to use long-term continuous water chemistry data to document hydrological changes over such an enormous geographic area and long time span.
Wildfires can perpetuate mercury contamination by releasing it from soil and plants and spreading it through smoke and ash. It doesn’t take much heat to convert mercury to a gas.
11 October 2016
Large precipitation events that occur about every 10 years are a critical source of recharge for replenishing groundwater resources, according to a new study. Groundwater is a vital source of water in the western United States and will be increasingly important with continued population growth and climate variability. Understanding the role of these large recharge events in replenishing aquifers and sustaining water supplies is crucial for long-term groundwater management.
30 August 2016
Something really drastic must have happened to the ancient Maya at the end of the Classic Period in the 9th Century. Within a short period of time, this advanced civilization in Central America went from flourishing to collapsing – the population dwindling rapidly and monumental stone structures, like the ones built at Yucatán, were no longer being constructed. The reason for this demise remains the subject of debate even today. Now, researchers at the Vienna University of Technology (TU Wien) may have found the explanation: the irrigation technology that served the Mayans well during periods of drought may have actually made their society more vulnerable to major catastrophes.
7 July 2016
Last year, scientists made a splash with the news that dark streaks on the Martian surface were signs of flowing liquid water. So far, they have been unable to determine where the water is coming from, but a new study uses recently acquired data of a large canyon system on Mars to eliminate some of the possibilities.
22 June 2016
Andreas Novotny thought he would find Hemiaulus here. He has not. “It is what it is, which is fine,” he says. “What we need to do is figure out why.” Andreas is a PhD. student and his research focuses in the symbiotic relationship between a kind of plankton, a Diatom called Rhizosolenia, and a Nitrogen-fixing Cyanobacteria, called Richelia.
2 June 2016
A new study finds that in a Phoenix suburb, homeowners’ associations are good for water conservation. According to the study, homes in HOAs in Goodyear, Arizona use up to 17,000 fewer liters of water (4490 gallons) in the peak month of July compared to their non-HOA counterparts, roughly the amount needed to fill eleven hot tubs.
20 April 2016
Irrigation from agriculture can directly influence climate thousands of kilometers away and even leap across continents, new research finds. Up to 40 percent of the rain in some regions of East Africa can be attributed to irrigation used in agriculture in Asia, according to a new study published in Geophysical Research Letters.
19 April 2016
his is a story about how water data standards, computational hard work, high-performance computing, serendipity and synergy led to an operational capability for nationwide forecasting of streamflow and flooding at high-resolution, in near-real-time. This has been evolving for several years now, but has gone into hyper-drive in just the last couple years.
16 March 2016
On Monday night, I slept for the first time on the ship while it was moving. Laying in my top bunk, swaying side to side, I could hear the water moving and waves hitting the side of the boat. The motion of the ship rocked me to sleep, but every so often the boat would rock further sideways, and I would have to brace myself so I wouldn’t fall out of the top bunk. I could also hear the CTD hitting the deck periodically while the night crew did their work.
15 March 2016
When you plan a research cruise in the winter in Oregon, there’s a good chance the weather will change your plans. That’s what happened to us this weekend. We were finally able to get back out on the ocean on Monday afternoon and we drove south to the Umpqua Hydrographic line – a seven-hour trip. It was a rough ride and most people spent it in their bunks or in the lounge, where books flew off the shelves when we hit particularly rough spots.
14 March 2016
On Sunday afternoon, we headed back to Newport. The scientists and crew were closely watching the weather to see when we will be able to head back on the water. The down time gives Goni and his team some time to filter water samples that were collected from the Newport Hydrographic Line on Friday. The samples are one piece of a larger project trying to figure out how small coastal rivers are influencing coastal ocean productivity during the winter.
22 May 2014
Applying science to natural resource policy issues: Social science joins natural and physical sciences
By Jana Davis, Executive Director, Chesapeake Bay Trust As AGU members, we generally focus on the contribution of physical and natural science solutions to policy questions. But sometimes an issue calls for us to step outside the boundaries of these “hard” sciences to the social sciences. Areas in which many of us tend to be less comfortable. And less trained. Watershed restoration and protection can be just such an issue. …
6 November 2013
AGU has launched the Thriving Earth Exchange, a new initiative that supports communities as they protect themselves from hazards, adapt to a changing planet, and create sustainable futures. Featured in this week’s edition of Eos, learn more about the program where AGU members will work with local leaders to contribute their Earth and space science expertise to significant societal challenges. The Thriving Earth Exchange is inspired by a series of …
4 June 2013
Water and energy are linked resources in ever-increasing demand in the United States. Energy production requires an abundant, reliable, and predictable source of water, a resource that is unfortunately in short supply already throughout large portions of the U.S. Additionally, developing water supplies can require large amounts of energy to extract, transport, treat, and distribute. As such, the water-energy nexus presents a significant challenge for our country’s water resource and …
5 August 2011
What you’re seeing here is a series of HiRISE images of a crater wall on Mars. Starting in the spring, hundreds of dark streaks form and make their way downhill, and then they fade in winter. The leading hypothesis is that they are flowing salty water, but I am still skeptical.