NASA’s GEDI mission has reached a milestone with the release of its latest data product, giving a nearly global first impression of the planet’s forest biomass and the carbon it stores. and – filling a major key to climate research.
The data can investigate how the Earth’s forests are changing, what they are doing to reduce climate change, and the local and global effects of planting. and cutting down trees.
With the latest data product from GEDI, Global Ecosystem Dynamics Investigation, ecosystem and ecosystem researchers can quickly locate their areas of interest and learn about the nature of forests and carbon emissions with greater ease. right than ever before.
The release of the new biomass product GEDI comes within a year of missionary expansion and demonstrates the impact of significant advances in spaceborne lidar (a type of laser) research.
Carbon counts in the forests of the Earth
GEDI is a high -end lidar tool designed to measure plants. From its base station on the International Space Station, GEDI quickly emits laser pulses from trees and shrubs below to create detailed 3D maps of forests and landforms. The final data set, designed and recorded at a 1-km (0.39-square mile) area, allows researchers to study questions about forest ecosystems, animal habitats, Carbon emissions, and climate change.
During its first three years in orbit, GEDI captured billions of measurements between 51.6 degrees north and south latitude (relative to the latitudes of London and the Falkland Islands, respectively). ).
The new data product combines data from GEDI with air and earth lidars to create a biomass map that shows the number of plants in an area.
“A big part of the uncertainty is that we don’t know how much carbon is stored in the Earth’s forests,” said Ralph Dubayah, GEDI’s chief researcher and professor of science. Land at the University of Maryland. Trees absorb carbon from the air to stimulate their growth. But scientists need to know how much carbon is stored so they can predict how much will be emitted by deforestation or wildfires. About half of the plant biomass contains carbon.
GEDI’s new product is not the world’s first biomass product, but it is the first to introduce well -defined ambiguity about its options using high -quality models. That is, GEDI’s biomass estimates come with a view to the accuracy of those measurements. “That is, for every 1-kilometer of average biomass, the missionary knows the reliability of that estimate,” Dubayah said.
The GEDI team compared their results with forest data from the Food and Agriculture Organization of the United Nations and the U.S. Forest Service Forest Inventory and Analysis data, and found that GEDI’s biomass selections were compared to those. two things. The features where the GEDI product differs from the inventories indicate the opportunities for further training and calibration.
“We can use this strategy to select biomass for entire countries – for example, many countries in pan -tropical areas don’t have geographic information,” said John Armston, lead of GEDI for certification and calibration and a research team at the University of Maryland. “Now we have a way to provide an estimate of the biomass on the planet without any clarity that can be used to support the description of the climate and the scope of applications.”
In many parts of the world, Armston said, there is a lot of interest in using the GEDI to look at forest and forest descriptions to monitor carbon, but also because of the nature of the carbon footprint. Ecological characteristics for biodiversity assessments.
“Determining the ecosystems of forests and forest ecosystems with a clearer understanding is better, not only in terms of carbon footprint, but in terms of our understanding of their ecological status and the impact of the all kinds of land management, “he said.
It lays a foundation for future missionaries
The company will continue to refine its biomass data in the future, and has expanded its mission to January 2023, providing an opportunity to gather more data. In addition, the International Space Station has reconfigured its orbit from 262 miles (421 kilometers) above Earth to an area of 258 miles (417 kilometers). The low orbit allows GEDI to have a wide variety of coverage, i.e. fewer gaps in its data from east to west, giving the missionary a more complete view of Earth and with hot forests.
“With GEDI’s ability to collect data by 2023, we are approaching data collection at the same time as the next generation of lidar and radar missions – such as NISAR (NASA -ISRO SAR, starting in 2024), ”said Laura Duncanson, an assistant professor at the University of Maryland and one of GEDI’s research scientists. “Ultimately, the best products will not be based on GEDI, but on a combination of satellite data sources.”
NASA has released preliminary data
Courtesy of NASA’s Goddard Space Flight Center
Directions: NASA releases forest biomass-carbon production data (2022, April 5) retrieved April 5, 2022 from https://phys.org/news/2022-04-nasa-breakthrough-forest-biomass- carbon-product.html
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