BER launches Environmental System Science Program. Visit our new website under construction!

U.S. Department of Energy Office of Biological and Environmental Research

BER Research Highlights

Global Positioning System (GPS ) Promising Measurement Technology for Water Vapor.
Published: February 28, 2001
Posted: August 03, 2001

Recent studies indicate that the GPS may lead to improved short-term weather forecasting models and physical models of cloud formation. Using a network of GPS stations, scientists working with the U.S. Department of Energy's Atmospheric Radiation Measurement (ARM) program and its partners are developing innovative ways to measure water vapor and tomographic techniques to compute three-dimensional water vapor fields. ARM's specific interest is gathering information on the formation of clouds.

The new technique depends on a network of GPS receivers, each getting signals from several GPS satellites at once. When a satellite sends a microwave signal through the atmosphere, the signal is delayed by water vapor. Measuring this delay allows scientists to estimate the integrated amount of water vapor along the signal path from the satellite, called the "slant path water vapor." Analyses provide the variability of water vapor in the space above the GPS receivers as well as the three-dimensional water vapor distribution above the network.

The ARM program and its government and university partners are involved in two related GPS measurement demonstrations. In one project, the University of Oklahoma is partnering with ARM to establish GPS stations over an area of about 55,000 square miles. The second is a collaboration between ARM and the University Corporation for Atmospheric Research to provide a more dense GPS network. If these demonstrations are successful, the projects will show that GPS networks can provide a low cost way to continuously monitor water vapor variability on scales ranging from a few kilometers to 500 kilometers.

More information is available at [website].

Contact: Wanda R. Ferrell, SC-74, 3-0043
Topic Areas:

  • Research Area: Atmospheric System Research

Division: SC-33.1 Earth and Environmental Sciences Division, BER
      (formerly SC-74 Environmental Sciences Division, OBER)


BER supports basic research and scientific user facilities to advance DOE missions in energy and environment. More about BER

Recent Highlights

Mar 23, 2021
Molecular Connections from Plants to Fungi to Ants
Lipids transfer energy and serve as an inter-kingdom communication tool in leaf-cutter ants&rsqu [more...]

Mar 19, 2021
Microbes Use Ancient Metabolism to Cycle Phosphorus
Microbial cycling of phosphorus through reduction-oxidation reactions is older and more widespre [more...]

Feb 22, 2021
Warming Soil Means Stronger Microbe Networks
Soil warming leads to more complex, larger, and more connected networks of microbes in those soi [more...]

Jan 27, 2021
Labeling the Thale Cress Metabolites
New data pipeline identifies metabolites following heavy isotope labeling.

Analysis [more...]

Aug 31, 2020
Novel Bacterial Clade Reveals Origin of Form I Rubisco

  • All plant biomass is sourced from the carbon-fixing enzyme Rub [more...]

List all highlights (possible long download time)