"We found old pika fecal pellets buried in sediment in nearly every patch of habitat we searched," Stewart says."But the animals themselves were conspicuously absent." Pikas definitely once lived there, so to figure out when they disappeared, the researchers relied on radiocarbon dating. Their findings suggest pikas vanished from many lower-elevation sites around Mount Pluto before 1955, but held out near the mountain's peak until as recently as 1991.These projection coordinates are the only metadata that accurately reflect the extreme corners of the gridded image • There are additional BOUNDINGRECTANGLE and GRINGPOINT fields within the metadata, which represent the latitude and longitude coordinates of the geographic tile corresponding to the data The Data Set attributes contain specific SDS information such as the data range and applicable scaling factors for the data.The LP DAAC data products page provides these details within a concise document for each of the products.However, it is difficult for a standard HDF call to interpret HDF-EOS geolocation or temporal information without further knowledge of the file structure.Along with all the data from other instruments on board the Terra and Aqua platforms, MODIS data are transferred to ground stations in White Sands, New Mexico, via the Tracking and Data Relay Satellite System (TDRSS).
"As the hottest, lowest-elevation sites became too hot for pikas, they became restricted to just the mountain top, and then the mountain top became too hot as well." Pikas have overcome natural climate changes in the past, Stewart notes, but those happened much less quickly."This time, however, we're seeing the effects of climate change unfold on a scale of decades as opposed to millennia." It's not too late to see American pikas in mountains near this area of extinction, he adds, noting that "Mount Rose and Desolation Wilderness are still great places to see pikas." Time is running out, though, as the researchers forecast that, by 2050, climate change will lead to a 97 percent decline in suitable conditions for pikas in the Lake Tahoe area."Our hope is that simply getting the word out there that climate change is causing iconic wildlife to disappear will get people talking and contribute toward political will to reign in and reverse climate change," Stewart says.The American pika is a rotund, mountain-dwelling relative of rabbits, famous for adorably darting around with mouthfuls of grass and wildflowers.It's well-adapted to alpine terrain, where its fur, girth and resourcefulness have helped it endure for millennia.
An HDF-EOS file also contains EOS core metadata essential for EOS search services.