加拿大pc28官网开奖网址 Extreme fires amplify post-fire land surface warming: study

XI'AN, Sept. 25 (Xinhua) -- An international research team led by Chinese scientists has revealed that extreme fires amplify post-fire land surface warming加拿大pc28官网开奖网址, offering new perspectives for a comprehensive understanding of the impacts of forest fires on ecosystem and climate change.

The research was published in the journal Nature on Wednesday.

Climate warming has led to a trend of frequent, widespread and intense extreme forest-fire events, but the impact of increasingly large forest fires on surface climate has been underestimated, said Yue Chao with Northwest A&F University, leader of the research team.

"We used satellite observations to show that加拿大pc28官网开奖网址, in northern temperate and boreal forests, fire size persistently amplified decade-long post-fire land surface warming in summer per unit burned area," Yue said.

2008年是全国都无法忘记的年份，因为汶川发生了特大地震，大批的军人在得到情况后第一时间赶到受灾现场，只为早点解救遭遇困难的群众。还有郑州720的特大洪水，战士们都在抗洪抢险的第一线。张豪就是他们中的一个，只有19岁。后来他在抓歹徒时，中了十三枪，现在他的情况怎么样呢？

“开庭、举证、质证、量刑宣判......”

According to the study, surface warming caused by extreme fires affects the ability of post-fire forests to regenerate and their species composition, and reinforces the degradation of permafrost and accelerates the release of organic carbon from permafrost. This means that extreme fires are likely to exacerbate global warming, which in turn will lead to more extreme fires, thus creating a vicious cycle.

The study found that surface warming decreases with the increase of broad-leaved trees, so appropriately increasing the proportion of broad-leaved trees could mitigate the climate risk caused by fires.

The results suggest the urgency of scientific understanding of the ecological and climatic impacts of extreme fires, and the prevention and control of climate risks of extreme fires加拿大pc28官网开奖网址, promising to improve the ability of predicting future climate change and responding to extreme fires, Yue said.  ■