The organizations have signed a Space Act Agreement that will provide a location to support NASA’s Precipitation Science programs, in particular the NASA-JAXA Global Precipitation Measurement mission. As a byproduct of this research, data also will be collected that can be used by Nature Conservancy-affiliated researchers to study migratory birds on Virginia’s Eastern Shore.
Through the agreement, the Conservancy is providing access to NASA at the Virginia Coast Reserve near Oyster, Va., to place the NASA Polarimetric (NPOL) weather radar, rain gauges and other instruments that will support ground validation of the Global Precipitation Measurement (GPM) mission. In return, NASA will, on request and a non-interference basis, support migratory bird studies by The Nature Conservancy using the NPOL radar.
The GPM mission is an international network of satellites that will provide the next generation of global space-based observations of rain and snow. The GPM Core Observatory is scheduled for launch in 2014. These GPM measurements of precipitation will advance our understanding of the global water cycle, ability to predict flooding and improve forecasting of weather.
“The NPOL radar and NASA rain gauge facilities being deployed in and around Oyster and the Delmarva Peninsula will support the GPM mission by providing accurate, high resolution measurements of rainfall--a process referred to as 'ground validation,’" said Walt Petersen, GPM ground validation scientist at the Wallops Flight Facility in Virginia.
Petersen said, “At the Nature Conservancy site, ground validation is used to assess measurement accuracy of the GPM satellite instruments through a more complete understanding of rainfall characteristics and the physical processes associated with rainfall production.”
Barry Truitt, a scientist with The Nature Conservancy, said, “This five-year collaborative project with NASA will help the Conservancy and our partners further identify what habitats migratory birds are utilizing for fall stopovers along the lower Delmarva Peninsula and the conservation status of these lands. This agreement builds on the Conservancy’s 40-plus years of research, restoration and protection on the Eastern Shore of Virginia.”
To provide the necessary rainfall measurements for GPM ground validation a combination of radar and rain gauge measurements is needed. NASA is stationing approximately 50 rain gauges in an area of approximately 10 square miles near Oyster. This very concentrated network of gauges will serve as a reference for validating rain estimates made using the advanced capabilities of the NPOL radar.
The Conservancy is collaborating with professors Jeff Buler of the University of Delaware and Eric Walters of Old Dominion University on using the NPOL radar and its data stream for migratory bird studies on the southern end of the Delmarva Peninsula.
Buler is a radar ecologist who has mapped the distributions of birds during migratory stopover by observing their locations when they take flight in the evenings using the national network of NEXRAD weather surveillance radars. NPOL is a unique surveillance radar that will collect datasets offering improved bird identification and observation capabilities. The NPOL will be located in a region where NEXRAD radars do not already observe migrating birds.
Walters is an avian conservation biologist who will be ground-truthing the identity and abundance of both birds and habitat components within high-use stopover habitats and areas identified by Buler and his research team.
Future research plans for the team include validating NEXRAD-based bird stopover models, observations of shorebird and waterfowl activity in the coastal bays, discerning bird from insect flight activity, and observations of the flight behavior of migrating birds in relation to weather.
The Nature Conservancy is a leading conservation organization working around the world to protect ecologically important lands and waters for nature and people. The Conservancy and its more than 1 million members have protected nearly 120 million acres worldwide. Visit The Nature Conservancy on the Web at www.nature.org.