Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Unique NASA Satellite Watches Rainfall from Space

14.05.2003


Your local weather forecaster uses Doppler radar systems, covering U.S. regions, to estimate rainfall and flooding, but NASA research satellites can see rainfall worldwide.



Data from NASA’s Tropical Rainfall Measuring Mission (TRMM)satellite, along with information from other satellites, allows researchers to see how much rain is falling over most of the world every three hours. This capability enables scientists to daily map areas of potential flooding.

These maps, available to the public on the Internet, will help water resource managers and scientists around the world by providing near-real time data of rainfall and flood potential. TRMM is considered a unique "rain gauge in the sky," because its instruments can look into clouds to determine rainfall, while other satellites can only see flooded areas after floods have occurred.


Because of its extraordinary capability, TRMM is used to calibrate and fine-tune measurements of rainfall taken by other satellites, leading to current updated records on a global scale. Once baselines are established, researchers use the higher quality TRMM data wherever possible and fill in the gaps with data from other satellites to get a more complete picture of rainfall around the world.

"This ability to detect potential floods is extremely useful for disaster monitoring," said Robert Adler, TRMM Project scientist at the Goddard Space Flight Center, Greenbelt, Md.

"The rainfall maps are also useful in assessing the state of crops in remote regions, especially in the tropics," he said.

Maps that show areas of potential floods use precipitation radar data and high-resolution measurements of water content of clouds made by microwave radiometers. The maps span the Earth from 50 degrees north latitude to 50 degrees south latitude (an area just north of the U.S.-Canadian border and south to the tip of Argentina).

There are three variations of the rainfall accumulation maps, including 24-hour maps showing areas where more than 35 mm (1.37 inches) of rain has accumulated; maps with three-day accumulations of more than 100 mm (3.93 inches); and maps depicting areas with weeklong accumulations of more than 200 mm (7.87 inches).

Another map product, updated every three hours, shows a global snapshot of rainfall. A seven-day "movie loop" of the images allows users to track storms as they travel over land and oceans around the globe. Researchers use these near-global rainfall maps to monitor formation and dissipation of El Nino/Southern Oscillation conditions, soil moisture, and ocean salinity. These maps also are useful to water resource managers and farmers around the world.

The Adler led team of NASA scientists produced these TRMM rainfall and flood potential maps. The maps merge data from the TRMM Microwave Imager Precipitation Radar with information from other microwave satellites and geosynchronous weather satellite infrared data. Exploiting the strengths of multiple data sources increases the accuracy of the maps.

TRMM is a joint U.S.-Japanese mission and part of NASA’s Earth Science Enterprise, a long-term research program designed to study the Earth’s land, oceans, air, ice and life as a total system. The TRMM satellite was launched on November 27, 1997.

NASA’s Earth Science Enterprise is dedicated to understanding the Earth as an integrated system and applying Earth System Science to improve prediction of climate, weather and natural hazards, using the unique vantage point of space.


For information and TRMM images on the Internet, visit: http://www.gsfc.nasa.gov/topstory/2003/0425floods.html

For information about TRMM rain and flood maps on the Internet, visit: http://trmm.gsfc.nasa.gov/

For information about NASA and Earth Science projects on the Internet, visit:

Krishna Ramanujan | Goddard Space Flight Center
Further information:
http://www.gsfc.nasa.gov/topstory/2003/0425floods.html
http://trmm.gsfc.nasa.gov/
http://www.nasa.gov

More articles from Earth Sciences:

nachricht How much biomass grows in the savannah?
16.02.2017 | Friedrich-Schiller-Universität Jena

nachricht Canadian glaciers now major contributor to sea level change, UCI study shows
15.02.2017 | University of California - Irvine

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Switched-on DNA

20.02.2017 | Materials Sciences

Second cause of hidden hearing loss identified

20.02.2017 | Health and Medicine

Prospect for more effective treatment of nerve pain

20.02.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>