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NASA/NOAA Satellites Observe Surprisingly Rapid Increase in Scale and Intensity of Fires in Siberia, SciTech Daily By KASHA PATEL, NASA EARTH OBSERVATORY AUGUST 7, 2020   Abnormally warm temperatures have spawned an intense fire season in eastern Siberia this summer. Satellite data show that fires have been more abundant, more widespread, and produced more carbon emissions than recent seasons.The area shown in the time-lapse sequence above includes the Sakha Republic, one of the most active fire regions in Siberia this summer. The images show smoke plumes billowing from July 30 to August 6, 2020, as observed by the Visible Infrared Imaging Radiometer Suite (VIIRS) on NASA/NOAA’s Suomi NPP satellite and the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite. Strong winds occasionally carried the plumes as far as Alaska in late July. As of August 6, approximately 19 fires were burning in the province……

Estimates show that around half of the fires in Arctic Russia this year are burning through areas with peat soil—decomposed organic matter that is a large natural carbon source. Warm temperatures (such as the record-breaking heatwave in June) can thaw and dry frozen peatlands, making them highly flammable. Peat fires can burn longer than forest fires and release vast amounts of carbon into the atmosphere. ……

“The destruction of peat by fire is troubling for so many reasons,” said Dorothy Peteet of NASA’s Goddard Institute for Space Studies. “As the fires burn off the top layers of peat, the permafrost depth may deepen, further oxidizing the underlying peat.” Peteet and colleagues recently reported that the amount of carbon stored in northern peatlands is double the previous estimates.

Fires in these regions are not just releasing recent surface peat carbon, but stores that have taken 15,000 years to the accumulate, said Peteet. They also release methane, which is a more potent greenhouse gas than carbon dioxide.

“If fire seasons continue to increase in severity, and possibly in seasonal extent, more peatlands will burn,” said Peteet. “This source of more carbon dioxide and methane to our atmosphere increases the greenhouse gas problem for us, making the planet even warmer.”…… https://scitechdaily.com/nasa-noaa-satellites-observe-surprisingly-rapid-increase-in-scale-and-intensity-of-fires-in-siberia/