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NPS | 2021
The Yukon River basin encompasses 832,000 square-kilometers and is one of Earth's largest boreal-Arctic rivers. Characterized by a long, frozen winter season, the river demonstrates an abrupt…
NPS | 2021
Twenty years ago, ecological studies were often limited by the number of times biologists could find (relocate) their study animals. With the advent and now widespread use of Global Positioning…
NPS | 2021
The snow season has become shorter and the growing season longer over the past 20 years in Alaska's Arctic National Parks. The NPS Arctic Inventory and Monitoring Network (ARCN) uses MODIS (Moderate…
NPS | 2013
One of the key early steps in preparing for sea-level rise and storm surge is ensuring that the geodetic “backbone,” the National Geodetic Survey (NGS) benchmarks, have long-term viability and…
NPS | 2013
Timucuan Ecological and Historic Preserve (TIMU), Jacksonville, FL, contains thousands of acres of healthy and productive salt marsh. These salt marshes provide crucial habitat to a wide variety of…
NPS | 2013
The Alaska Shallow Lake Monitoring Program, part of the NPS Inventory and Monitoring Program, monitors the water quantity and chemistry of shallow lakes along with the composition of the vegetation…
NPS | 2013
The 2010 lidar survey of Crater Lake National Park, Oregon, penetrated forested terrain to reveal surface features of the ignimbrite (pyroclastic flow deposit) from the climactic caldera-forming…
NPS | 2013
NPS used high-resolution IKONOS satellite images and a combination of manual and computer-assisted methods to map slumps and small landslides caused by thaw of permafrost in Alaska's Arctic national…
NPS | 2013
Slumps caused by thaw of permafrost are common in Alaska's Arctic national parks. Slumps often occur near rivers or lakes and can shed significant amounts of sediment into the adjacent water body.…
NPS | 2013
On February 11, 2013, Santa Monica Mountains National Recreation Area (SAMO) staff cheered when we saw rocket contrails from the launch of Landsat 8 a few miles north of the park. Barely 3 months…