News

  • Xiquan Dong's Arctic Sea Ice Study Published in Arctic Sea Ice News & Geophysical Research Letters

    The linear trends of satellite retrieved (a-d) cloud fractions from March to June and (e) September sea ice concentrations over the Arctic regions in early twenty-first century (2000-20015). Image: Xiquan Dong
    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
  • Eric Betterton Discusses Summer's Effect on Air Quality with Arizona 360's Lorraine Rivera

    Photo Eric Betterton on Arizona Public Media's Arizona 360 segment discussing summer's effect on air quality
    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
  • Eric Betterton and Others Voice Concern Over Proposed Weakening of EPA Emissions Standards

    EPA Emissions Standards News Conference Tucson June 25 2019
    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
  • Dusty News: Technology Expected to Help Drivers in Arizona Dust Storms

    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
  • Important New Study by Laura Condon Shows Groundwater Pumping Has Significantly Reduced U.S. Stream Flows

    Photo HAS Assistant Professor Laura Condon
    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

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