Data/hora: 18/06/2024 04:52:32

Provedor de dados: | 17
País: | United Kingdom
Título: | Can global models reproduce the current increase in Western United States Wildfires and project a reliable future trend?
Autores: | Dominique  Bachelet; Dave Conklin; Brendan Rogers; Maureen McGlinchy; Jim Lenihan; Ron Neilson; Ray Drapek.
Data: | 2009-08-14
Ano: | 2009
Palavras-chave: | Ecology; Earth &amp; Environment.
Resumo: | Background/Question/Methods:&amp;#xd;&amp;#xa;Wildfires in the western U.S. are generally thought to have increased since the 1980s. Many factors have contributed to this increase such as fire suppression, livestock grazing, and urban sprawl. Fires have also been associated with variations in sea surface temperatures and described by indices such as El Ni&amp;#xf1;o Southern Oscillation (ENSO), the Pacific Decadal Oscillation (PDO), and the Atlantic Multidecadal Oscillation (AMO). Recent analyses have also shown that we may have entered a new fire regime starting with a climate shift in 1998 and are currently entering years of combined long-term warm AMO phase with cool ENSO and PDO phases usually associated with increased drought-induced fires in the interior West. Moreover, while the increase in atmospheric CO2 is likely increasing water use efficiency and thus reducing drought stress in western ecosystems, it may also have enhanced fuel build-up as warm temperatures enhance growth and thus contribute to larger fires during extreme drought conditions. &amp;#xd;&amp;#xa;&amp;#xd;&amp;#xa;Results/Conclusions:&amp;#xd;&amp;#xa;We have run our dynamic vegetation model MC1 in the conterminous United States at various spatial resolutions (grain) and documented the relative importance of climate and CO2 on historical fires (1895-2006) using continental (2500km2 pixels), regional (100km2 pixels), and local (0.64km2) climate and soil datasets. We will present some of our results at those various scales, compare them to observations, and discuss scaling issues. &amp;#xd;&amp;#xa;
Tipo: | Presentation

Identificador:

http://precedings.nature.com/documents/3618/version/1

oai:nature.com:10.1038/npre.2009.3618.1

http://dx.doi.org/10.1038/npre.2009.3618.1

Fonte: | Nature Precedings
Fonte: | Creative Commons Attribution 3.0 License