Mobilization and transport of coarse woody debris to the oceans triggered by an extreme tropical storm
Mobilization and transport of coarse woody debris to the oceans triggered by an extreme tropical storm
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DOI：
10.4319/lo.2011.56.1.0077
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发表时间：
2011-01
影响因子：
4.5
通讯作者：
A. West;C. Lin;T. Lin;R. Hilton;Shou-Heng Liu;Chung-Te Chang;K. Lin;A. Galy;R. Sparkes;N. Hovius
中科院分区：
文献类型：
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作者：
A. West;C. Lin;T. Lin;R. Hilton;Shou-Heng Liu;Chung-Te Chang;K. Lin;A. Galy;R. Sparkes;N. Hovius
2009年8月莫拉克台风的一个重大后果是在太平洋亚洲产生大量浮木。我们通过结合遥感（使用FORMOSAT-2图像和航空摄影）、森林生物量分析和实地观测，对莫拉克台风在台湾登陆引发的山体滑坡中粗木质残体（CWD）流入海洋的通量进行了量化。总共有3.8-8.4 Tg的CWD被运到海洋，携带1.8-4.0 Tg的有机碳。除了这种高度集中的碳和营养物通量对海洋和沿海环境的局部影响外，风暴驱动的CWD移动可能是陆地生物量向海洋的重要转移，即使不经常。如果相对罕见的极端风暴（如莫拉克）的频率在气候变化中增加，这种传输机制可能在全球气候，风暴强度和碳循环之间的反馈中发挥重要作用。
A significant consequence of Typhoon Morakot in August 2009 was the production of vast volumes of driftwood in Pacific Asia. We have quantified the flux of this coarse woody debris (CWD) to the oceans from typhoon‐triggered landslides in Taiwan, where Morakot made landfall, by combining remote sensing (using FORMOSAT‐2 imagery and aerial photography), analysis of forest biomass, and field observations. A total of 3.8–8.4 Tg CWD was transported to the oceans, carrying 1.8–4.0 Tg of organic carbon. In addition to the local effects on the marine and coastal environment from such a highly concentrated flux of carbon and nutrients, storm‐driven mobilization of CWD may represent a significant, if infrequent, transfer of terrestrial biomass to the oceans. If the frequency of relatively rare, extreme storms such as Morakot increases in a changing climate, this transport mechanism may play an important role in feedbacks between global climate, storm intensity, and carbon cycling.