The world has been changing every second; but last few years, we can see the change more clearly. Especially natural disasters are appealing because of global warming and climate change. The wildfires in Australia in 2019 - 2020 and Turkey and Italy in 2021 are the most important indicators. The regeneration of vegetation after the fire is critical for the development of healthy plant communities in forests, as well as grassland and other areas. Monitoring ongoing development can be difficult, especially when circumstances are foggy or data is based exclusively on visual measures. Radar data, on the other hand, are now being utilized to better understand how plant communities recover following fires. Because of vegetation's capacity to absorb carbon and anticipate future fires, such data will be critical in our climate change projections. Radar signals can be recognized depending on the presence of bare ground, unburned terrain, brush-covered hillsides, and areas with new or fresh plant development. Radar signal data may be color-coded according to vegetation, and data gathered over time can be layered to assess how vegetation has changed.
NASA researchers analyzes data from multiple SAR flights and developed a mapping technique to show the different stages of removal and regrowth of vegetation. The method is identifying ground types (burned area, new vegetation, tree, etc.) and classify them as colors with the radar signals which taken different time periods and patch together. Finally, the results can show us the development.
While the findings for SAR data used for mapping post-fire plant development have been generally positive, there are some results that highlight some possible concerns. Local incidence angle and terrain, for example, may have a bigger influence on findings, resulting in shadowing and misidentification.
Despite some severe restrictions, SAR data and images have been shown to be quite valuable for assessing vegetation regeneration following fires. This is significant because the capacity of vegetation, particularly forests, to rebound from fires is critical to maintaining a healthy ecosystem and combating climate change, given that new forests and plant growth regions may collect a significant amount of atmospheric carbon. Our capacity to track regrowth will also be useful for forecasting future fires, and data can be used to simulate fire advancement, which is becoming more of a hazard as a result of climate change.
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