1er juillet 2022
Les images satellites montrent la fumée de centaines de feux de forêt obscurcissant le ciel de l’Alaska.
Les étés alaskiens sont généralement décrits comme brefs et doux. Au début de l’été 2022, le mot qui ressort comme le plus descriptif est “enfumé”.
Dans une scène fumante qui s’est répétée plusieurs fois en juin et début juillet, la suite de radiomètres imageurs dans l’infrarouge visible (VIIRS) sur le ;” data-gt-translate-attributes=”[{” attribute=””>NASA-NOAA Suomi NPP satellite observed smoke spreading throughout large portions of Alaska. On July 1, 2022, intense fires were located in the southern and interior regions of the state, but strong southeasterly winds pushed smoke into the far north as well.
Smoke from one particularly smoky fire northwest of Iliamna Lake (southwest Alaska) obscured visibility on the Seward Peninsula, more than 400 miles (600 kilometers) to the northwest. The influx of smoke led to extremely high particulate matter readings (AQI above 700 at times) in the city of Nome, according to University of Alaska Fairbanks climatologist Rick Thoman.
Alaska surpassed 2 million acres (8,000 square kilometers, 3,000 square miles) burned on July 2, 2022, matching the earliest date for the milestone in the past 20 years. On July 5, 2022, the Alaska Interagency Coordination Center reported 210 active fires in the state. Forty-two were large fires with firefighters working on them, according to the National Interagency Fire Center. Wildfires are a regular feature of Alaskan summers, but this year’s fires have been exacerbated by drought, unusual heat, and several intense lightning storms. According to Thoman, in early July, the area burned was on track to be among the largest on record.
NASA Earth Observatory image by Lauren Dauphin, using VIIRS data from NASA EOSDIS LANCE, GIBS/Worldview, and the Suomi National Polar-orbiting Partnership.
