Alpine/Tundra - Earthdata
2022年8月31日 · Alpine/Tundra. Habitat found in the zone on mountain tops between permanent snow and the cold limits of trees, or in arctic regions, characterized by very low winter temperatures, short cool summers, permafrost below a surface layer subject to summer melt, short growing season, and low precipitation.
Updated Dataset for Boreal and Tundra Surface Water Extent
2019年1月24日 · The Surface Water Extent, Boreal and Tundra Regions, North America, 1991-2011, dataset ( doi: 10.3334/ORNLDAAC/1324) was first released in June 2016; this update corrects spatial reference information for GeoTIFF files and supersedes all earlier data files. The dataset is part of NASA’s Arctic Boreal Vulnerability Experiment ( ABoVE) field ...
In the Arctic Darkness - Earthdata
2016年9月28日 · The tundra’s top layer, called the active layer, thaws in the summer and freezes in winter, unlike the permafrost underneath that stays frozen all year. While Zona’s team only saw flat or hilly landscapes with squat vegetation, their colleagues in NASA's Carbon in Arctic Reservoirs Vulnerability Experiment (CARVE) viewed the tundra’s ...
Alpine/Tundra RSS - Earthdata
Earthdata | Alpine/Tundra RSS The dataset, which is part of NASA’s Arctic Boreal Vulnerability Experiment (ABoVE), enables comparisons of changes in surface water extent spanning 20 years. Updated Dataset for Boreal and Tundra Surface Water Extent
Terrestrial Ecosystems - Earthdata
2024年7月22日 · The Earth Observing System Data and Information System is a key core capability in NASA’s Earth Science Data Systems Program. It provides end-to-end capabilities for managing NASA’s Earth science data from various sources—satellites, aircraft, field measurements, and various other programs.
Riding the Permafrost Express - Earthdata
2005年2月15日 · Construction engineers are using several techniques to stabilize the permafrost below the roadbed and protect the rail line from freeze/thaw hazards. These include re-routing some sections to avoid unstable areas, erecting overpasses across sensitive terrain, and building an insulation layer under the rail bed to maintain permafrost stability.
40 began in 2009, and remote sensing data stretches back to 2002. The study calculated evaporation from 2002 to 2012, and even in that time
Earth Science Data Roundup: February 2024 | Earthdata
2024年2月5日 · The data were collected in August 2018 and 2019 to study the expansion of shrub cover, particularly alders, in tundra ecosystems and the potential impact of shrubs on soil properties. The data, which are provided in comma-separated values (CSV) format, include the maximum annual Normalized Difference Vegetation Index (NDVI) for 2019 and the ...
Geographic Information Systems Data Pathfinder - Find Data
2021年2月11日 · GIS is a collection of computer-based tools for organizing information from a variety of data sources to map and examine changes on Earth. It is designed to capture, store, manage, analyze, and visualize all types of geographical data. This NASA GIS Data Pathfinder links to NASA GIS-ready datasets, geospatial services, and tools for accessing data.
Savanna - Earthdata
2022年8月30日 · An unexpectedly large count of trees in the West African Sahara and Sahel. A rolling grassland scattered with shrubs and isolated trees, which can be found between a tropical rainforest and desert biome. Not enough rain falls on a savanna to support forests. Savannas are also known as tropical grasslands.