Document / Publication

  • Do more with your content!Discover PreventionWeb Services
  • Climate change is increasing the risk of extreme autumn wildfire conditions across California
    https://www.preventionweb.net/go/71171

    Email sent!

    An email has been sent to the email addresses provided, with a link to this content.

    Thank you for sharing!

    OK

Climate change is increasing the risk of extreme autumn wildfire conditions across California

Source(s):  IOP Science

California has experienced devastating autumn wildfires in recent years. These autumn wildfires have coincided with extreme fire weather conditions during periods of strong offshore winds coincident with unusually dry vegetation enabled by anomalously warm conditions and late onset of autumn precipitation. This study quantifies observed changes in the occurrence and magnitude of meteorological factors that enable extreme autumn wildfires in California, and use climate model simulations to ascertain whether these changes are attributable to human-caused climate change. The paper shows that state-wide increases in autumn temperature (~1 ˚C) and decreases in autumn precipitation (~30%) over the past four decades have contributed to increases in aggregate fire weather indices (+20%). As a result, the observed frequency of autumn days with extreme (95th percentile) fire weather – which the study shows are preferentially associated with extreme autumn wildfires – has more than doubled in California since the early 1980s. The study further finds an increase in the climate model-estimated probability of these extreme autumn conditions since ~1950, including a long-term trend toward increased same-season co-occurrence of extreme fire weather conditions in northern and southern California. The climate model analyses suggest that continued climate change will further amplify the number of days with extreme fire weather by the end of this century, though a pathway consistent with the UN Paris commitments would substantially curb that increase. Given the acute societal impacts of extreme autumn wildfires in recent years, the findings have critical relevance for ongoing efforts to manage wildfire risks in California and other regions.



Add this content to your collection!

Enter an existing tag to add this content to one or more of your current collections. To start a new collection, enter a new tag below.

See My collections to name and share your collection
Back to search results to find more content to tag

Log in to add your tags
  • Climate change is increasing the risk of extreme autumn wildfire conditions across California
  • Publication date 2020
  • Author(s) Goss, Michael; Swain, Daniel L.; Abatzoglou, John T. et al.
  • Number of pages 35 p.

Please note:Content is displayed as last posted by a PreventionWeb community member or editor. The views expressed therein are not necessarily those of UNDRR PreventionWeb, or its sponsors. See our terms of use