: ※ 引述《aotta (想去渡假 ><)》之銘言：
: WASHINGTON (Reuters) -- Here's another thing to blame on climate change --
: wildfires, those forest and grass fires that have threatened communities
: across the U.S. West, according to research published Thursday.
星期四根據一個出版的研究,這裡有個氣候驟便會導致的結果-野火,大火發生在森林
及草堆而威脅的人類社區
: And a warming climate will only cause more.
而溫暖的氣候只會造成更多的野火
: "We show that large wildfire activity increased suddenly and dramatically
: in the mid-1980s, with higher large-wildfire frequency, longer wildfire
: durations and longer wildfire seasons," the researchers at the University
: of Arizona in Tucson and the Scripps Institution of Oceanography in La
: Jolla, California wrote in the journal Science.
亞利桑那大學塔克森分校的研究和加州LaJolla海洋學Scripps機構的科學週刊寫到"我
們發現大型野火在1980年中期突然且劇烈地增加,而且大型野火的頻率,發生時間,和野
火的季節增加中"(這個野火的季節很怪>"<)
: "I see this as one of the first big indicators of climate change impacts
: in the continental United States," said Arizona's Thomas Swetnam, who worked
: on the government-funded study that tied warming and earlier springs to
: frequent large forest fires.
要出門了 回來再繼續 >"<
: "Lots of people think climate change and the ecological responses are 50
: to 100 years away. But it's not 50 to 100 years away -- it's happening now
: in forest ecosystems through fire," added Swetnam.
: Swetnam said he did not at first believe climate change affected forest
: fires. But he changed his mind as he and his colleagues studied 1,166
: forest wildfires between 1970 and 2003 that had burned at least 1,000 acres.
: "The length of the fire season has increased almost two-and-one-half months
: compared with 1970 to 1986," he said.
: Such fires have made recent headlines because they have burned entire
: communities and forced the evacuation of hundreds of households at a time.
: As of Thursday, the National Fire Information Center reported 412 new fires
: nationally and six large ones in Montana, Texas, Idaho, Nevada and Wyoming.
: Last month, a fire blackened 4,300 acres near Sedona, about 90 miles north
: of Phoenix, before it was contained.
: This week at least 5,500 people were evacuated in the Canadian provinces of
: Alberta and British Columbia.
: The frequency of wildfires appear to be strongly linked to annual spring
: and summer temperatures and to the timing of spring snowmelt, said Anthony
: Westerling of Scripps.
: "At higher elevations what really drives the fire season is the temperature,"
: Westerling said in a statement.
: "When you have a warm spring and early summer, you get rapid snowmelt.
: With the snowmelt coming out a month earlier, areas get drier overall.
: There is a longer season in which a fire can be started and more opportunity
: for ignition."
: As global temperatures rise, the researchers suggest more severe fires
: could change forest composition so drastically that the western forests,
: which currently store atmospheric carbon dioxide, could start adding carbon
: to the atmosphere. This in turn would drive temperatures even higher.
: Copyright 2006 Reuters. All rights reserved.This material may not be
: published, broadcast, rewritten, or redistributed.
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 61.64.77.47