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Wednesday, July 3, 2019
The linear trends of satellite retrieved (a-d) cloud fractions from March to June and (e) September sea ice concentration (SIC) over the Arctic (70o-90oN) regions in early twenty-first century (2000-2015). Cloud observations are derived from CERES-MODIS SYN1 Ed3.0 product. The black dots mark the regions where p < 0.05 (statistical significance at 95% confidence level). Image: Xiquan Dong
Important findings by HAS Professor Xiquan Dong's research group, which includes HAS doctoral student and NASA Graduate Fellow Yiyi Huang, HAS Research Professor Baike Xi, and several other co-authors, we... Read More
Monday, July 1, 2019
HAS Department Head Eric Betterton speaking on PBS' Arizona 360 about summer's effect on air quality.
Photo Credit: Arizona Public Media
Eric Betterton, University Distinguished Professor and HAS Department Head, recently spoke with Arizona Public Media's Arizona 360 host and producer Lorraine Rivera about summer's effect on air quality in Southern Arizona.
Betterton, who also chairs the Pima County Environmental Quality Advisory Council, explained how excess heat can affect the air we breathe by impacting the risk for wildfires and causing urban ozone levels to concentrate. "Last year in 201... Read More
Thursday, June 27, 2019
Pima County Supervisor Richard Elias, Tucson Mayor Jonathan Rothschild, Barbara Warren, MD, Director of Physicians for Social Responsibility Arizona Chapter, and Professor Eric Betterton, UA Dept. of Hydrology and Atmospheric Sciences, speak at a news conference regarding the dangers of rolling back the federal clean car standards. The event was held in a classroom at the Pima Medical Institute. Photo Credit: June 25, 2019, Christopher Conover/AZPM
At a news conference on Tuesday, HAS Department Head and University of Arizona Distinguished Professor Eric Betterton joined a group of scientists,... Read More
Wednesday, June 26, 2019
The Arizona Department of Transportation is set to use a $54 million federal grant to widen sections of I-10 and implement a project that would reduce dust-related crashes. The project includes long-range radar set near Picacho Peak that can detect approaching dust storms from 50 miles away.
The Arizona Department of Transportation recorded 85 dust-related crashes along the busy freeway from Phoenix to Tucson from 2010 to 2015. According to a 2016 report by the National Weather Service and the UA, dust is the third-leading cause of weather-related deaths behind extreme temperatures and flash f... Read More
Wednesday, June 19, 2019
Groundwater pumping in the last century has contributed as much as 50 percent to stream flow declines in some U.S. rivers, according to new research led by HAS Assistant Professor Laura Condon. This is the first study to look at the impact of past groundwater pumping across the entire U.S. Other researchers have examined how pumping has affected surface waters, but at smaller scales. This comprehensive study is extremely important because groundwater is often the slowest component of the terrestrial hydrologic system to recover from losses, Condon said.
Using a computer model, Condon and her c... Read More