The changing effects of Alaska's boreal forests on the climate system
The changing effects of Alaska's boreal forests on the climate system
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DOI：
10.1139/x09-209
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发表时间：
2010-06
影响因子：
2.2
通讯作者：
E. Euskirchen;A. McGuire;F. Chapin;T. Rupp
中科院分区：
文献类型：
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作者：
E. Euskirchen;A. McGuire;F. Chapin;T. Rupp
在阿拉斯加的北方森林中，最近的气候变化影响了这些森林与大气之间微量气体、水和能量的交换。北方森林的结构和功能的这些变化可以反馈到影响区域和全球气候。在这份手稿中，我们研究了阿拉斯加北部森林气候反馈的类型和幅度。研究普遍表明，气候变暖的净效应是对变暖的积极区域反馈。目前，主要的积极气候反馈可能与由于积雪减少而导致的地表积雪减少有关。较少的负反馈已经确定，他们可能不足以抵消大的正反馈。这些正反馈在区域尺度上最为明显，通过放大区域变暖的速度，降低了北方植被-气候系统的恢复力。鉴于该地区最近的变暖，各种相关的...
In the boreal forests of Alaska, recent changes in climate have influenced the exchange of trace gases, water, and energy between these forests and the atmosphere. These changes in the structure and function of boreal forests can then feed back to impact regional and global climates. In this manuscript, we examine the type and magnitude of the climate feedbacks from boreal forests in Alaska. Research generally suggests that the net effect of a warming climate is a positive regional feedback to warming. Currently, the primary positive climate feedbacks are likely related to decreases in surface albedo due to decreases in snow cover. Fewer negative feedbacks have been identified, and they may not be large enough to counterbalance the large positive feedbacks. These positive feedbacks are most pronounced at the regional scale and reduce the resilience of the boreal vegetation – climate system by amplifying the rate of regional warming. Given the recent warming in this region, the large variety of associated ...