Shows & Panels
- The 2014 Big Picture on Cyber Security
- AFCEA Answers
- Ask the CIO
- Building the Hybrid Cloud
- Connected Government: How to Build and Procure Network Services for the Future
- Continuing Diagnostics and Mitigation: Discussion of Progress and Next Steps
- Federal Executive Forum
- Federal Tech Talk
- The Future of Government Data Centers
- The Future of IT: How CIOs Can Enable the Service-Oriented Enterprise
- The Intersection: Where Technology Meets Transformation
- Maximizing ROI Through Data Center Consolidation
- Mitigating Insider Threats in Virtual & Cloud Environments
- Modern Mission Critical Series
- Moving to the Cloud. What's the best approach for me
- Navigating Tough Choices in Government Cloud Computing
- The New Generation of Database
- Satellite Communications: Acquiring SATCOM in Tight Times
- Targeting Advanced Threats: Proven Methods from Detection through Remediation
- Transformative Technology: Desktop Virtualization in Government
- The Truth About IT Opex and Software Defined Networking
- Value of Health IT
- Air Traffic Management Transformation Report
- Cloud First Report
- General Dynamics IT Enterprise Center
- Gov Cloud Minute
- Government in Technology Series
- Homeland Security Cybersecurity Market Report
- National Cybersecurity Awareness Month
- Technology Insights
- The Cyber Security Report
- The Next Generation Cyber Security Experts
Shows & Panels
GPS devices find huge water loss in western US
Monday - 8/25/2014, 1:58am EDT
SAN DIEGO (AP) -- About 63 trillion gallons of water have been lost to drought in the western United States, enough to blanket the region with 4 inches of water, according to a study published Thursday.
Researchers at the Scripps Institution of Oceanography at the University of California, San Diego, arrived at the conclusion by measuring the level of the earth's crust with a network of GPS stations that is normally used to predict earthquakes.
When water is lost because of a lack of rain and snow, the earth's crust rises. The sensors show that the earth's crust has risen an average of 4 millimeters in the western United States since last year and as much as 15 millimeters in the California mountains.
The earth's crust typically sags in the winter and spring, weighed down by water, and it rises during the dry season in summer and fall, said co-author Adrian Borsa. The authors removed those seasonal factors when analyzing about a decade of data from GPS stations within the National Science Foundation's Plate Boundary Observatory.
Last year, an area stretching west of the Rocky Mountains witnessed a "massive uplift," Borsa said. The rise was most striking in the Sierra Nevada mountains and California coastal regions, but it was spread over the entire region, unlike previous years when some pockets have gone up and others went down.
"It's just amazing to us that this covers the entire western United States," Borsa said.
The loss of water since last year is equivalent to the annual loss from the Greenland Ice Sheet, according to the study published in the journal Science.
The findings do not appear to raise any serious concerns about earthquake hazards, said Borsa, who hopes authorities use the measurements as a tool to measure the impact of drought. The findings cannot be compared to the severity of earlier droughts because the measurements were not used then.
Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.