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CASA

The NASA-CASA (Carnegie-Ames-Stanford Approach) project has been providing carbon dioxide (CO2) sequestration data sets to users globally for the past 30-years. The CASA Biosphere model simulates seasonal patterns in plant carbon fixation, biomass and nutrient allocation, soil nitrogen mineralization, and microbial CO2 emissions. CASA used NASA satellite imagery (e.g., Landsat) to estimate the yearly capture of CO2 from the atmosphere and the delivery of plant biomass to herbivores, decomposers, and to human populations.

A data visualization showing how greenhouse gases like carbon dioxide fluctuate in Earth's atmosphere during the year. The visualization is a map of Earth's continents with Antarctica across the bottom. The top half of the map is covered by a rainbow of brightly colored swirls representing gases, with red, at the top, representing the highest concentrations, and green and blue, near the equator, representing lower concentrations. The Southern Hemisphere, or lower half of the map, is mostly uncovered by the colorful swirls.

CASA Work on Gulf Coast

Map of wetland loss (dark blue pixels) across Barataria and Terrebonne Basins of coastal Louisiana detected by comparison of Landsat 8 NDWI images before and after the destructive storm surge of Hurricane Ida in August 2021. A total of 686 km² of wetland area was transformed to open water cover, more than twice the wetland area lost from Hurricane Katrina in 2005.
Map of wetland loss (dark blue pixels) across Barataria and Terrebonne Basins of coastal Louisiana detected by comparison of Landsat 8 NDWI images before and after the destructive storm surge of Hurricane Ida in August 2021. A total of 686 km² of wetland area was transformed to open water cover, more than twice the wetland area lost from Hurricane Katrina in 2005.
Potter, C. and Sukanna, T., 2023. Remote sensing of damage inflicted on coastal wetlands of southern Louisiana from tropical storms. Journal of Coastal Research, 
(External Link): Remote Sensing of Damage Inflicted on Coastal Wetlands of Southern Louisiana from Tropical Storms (bioone.org) 

Potter, C. and Amer, R., 2020. Mapping 30 years of change in the marshlands of Breton Sound basin (southeastern Louisiana, U.S.A.): Coastal land area and vegetation green cover. Journal of Coastal Research, 36(3), 437–450.

CASA Work in Alaska

Over the past two decades, vegetation across Alaska has displayed many dramatic changes. But these patterns of greening and forest damage are complex, with plants and trees thriving in many parts of the state, while degenerating rapidly in others. The NASA-CASA team has been tracking these changes in all Alaskan ecosystems using NASA satellite imagery (e.g., Landsat), including the impacts of wildfires on carbon emissions.

Potter, C. and Alexander, O., 2020, Changes in Vegetation Phenology and Productivity in Alaska Over the Past Two Decades. Remote Sensing,12, 1546.
(External link): Remote Sensing | Free Full-Text | Changes in Vegetation Phenology and Productivity in Alaska Over the Past Two Decades (mdpi.com)

Potter, C.S., 2019, Changes in vegetation cover of the Arctic National Wildlife Refuge estimated from MODIS greenness trends. Earth Interactions, 23, 1–18.