New Satellite-Based Maps to Aid in Climate Forecasts

August 5, 2019 – 05:55 am
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New, detailed maps of the world's natural landscapes created using NASA satellite data could help scientists better predict the impacts of future climate change.

The maps of forests, grasslands and other productive ecosystems provide the most complete picture yet of how carbon from the atmosphere is reused and recycled by Earth's natural ecosystems.

Scientists at the University of Edinburgh, Scotland, United Kingdom; NASA's Jet Propulsion Laboratory, Pasadena, California; and Wageningen University, Netherlands, used a computer model to analyze a decade of satellite and field study data from 2001 to 2010. The existing global maps of vegetation and fire activity they studied were produced from data from NASA's Terra, Aqua and ICESat spacecraft. The researchers then constructed maps that show where - and for how long - carbon is stored in plants, trees and soils.

The maps reveal how the biological properties of leaves, roots and wood in different natural habitats affect their ability to store carbon across the globe, and show that some ecosystems retain carbon longer than others. For example, large swaths of the dry tropics store carbon for a relatively short time due to frequent fires, while in warm, wet climates, carbon is stored longer in vegetation than in soils.

Although it is well known that Earth's natural ecosystems absorb and process large amounts of carbon dioxide, much less is known about where the carbon is stored or how long it remains there. Improved understanding about how carbon is stored will allow researchers to more accurately predict the impacts of climate change.

Study first author Anthony Bloom, a JPL postdoctoral scientist, said: "Our findings are a major step toward using satellite imagery to decipher how carbon flows through Earth's natural ecosystems from satellite images. These results will help us understand how Earth's natural carbon balance will respond to human disturbances and climate change."

Source: www.jpl.nasa.gov

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