Figure : insects-and-fire-in-northwest-forests

Insects and Fire in Northwest Forests

Figure 21.7

This figure appears in chapter 21 of the Climate Change Impacts in the United States: The Third National Climate Assessment report.

(Top) Insects and fire have cumulatively affected large areas of the Northwest and are projected to be the dominant drivers of forest change in the near future. Map shows areas recently burned (1984 to 2008)6a3ce882-e3f6-47c6-a9ae-dacb25c45e7f 93ae895c-ab04-4801-bb47-ac963c7311c1 or affected by insects or disease (1997 to 2008).380d02ac-7dd7-49d6-8dc9-3c4a9b989061 (Middle) Map indicates the increases in area burned that would result from the regional temperature and precipitation changes associated with a 2.2°F global warminge6181014-644e-4d56-ada8-1d0443307a51 across areas that share broad climatic and vegetation characteristics.a60c82f3-709d-4de2-a3c6-9b0fcb62e410 Local impacts will vary greatly within these broad areas with sensitivity of fuels to climate.a30d550d-f0d3-4e76-a494-24b746cce0ed (Bottom) Projected changes in the probability of climatic suitability for mountain pine beetles for the period 2001 to 2030 (relative to 1961 to 1990), where brown indicates areas where pine beetles are projected to increase in the future and green indicates areas where pine beetles are expected to decrease in the future. Changes in probability of survival are based on climate-dependent factors important in beetle population success, including cold tolerance,0a78dcff-b2b2-4bed-b176-3628489645ad spring precipitation,3a5064c4-6ed0-455d-8e9c-9b470d0eed91 and seasonal heat accumulation.6cebef1a-87a8-4554-87d3-3ba18107dc04 703f4c0b-a9f3-4393-ad55-e26a62fa5a95

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