Mudslide‐caused ecosystem degradation following Wenchuan earthquake 2008
Mudslide‐caused ecosystem degradation following Wenchuan earthquake 2008
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DOI：
10.1029/2008gl036702
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发表时间：
2009-03
影响因子：
5.2
通讯作者：
D. Ren;Jiahu Wang;R. Fu;D. Karoly;Yang Hong;L. Leslie;C. Fu;G. Huang
中科院分区：
文献类型：
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作者：
D. Ren;Jiahu Wang;R. Fu;D. Karoly;Yang Hong;L. Leslie;C. Fu;G. Huang
我们应用了一个可扩展的地质流体模型（SEGMENT），该模型考虑了土壤力学，植被蒸腾和根系机械加固以及水文过程，以模拟2008年汶川地震后滑坡发生的二维地图。模拟的地点和区域一般与观测结果一致。模型计算结果表明，滑坡使地球势能降低了1.52 × 10 ~（15）J。由此，被破坏的植被将235 Tg C转移到死亡的呼吸池中，并将5.54 × 10−2 Tg N转化为不可利用的沉积物池和大气。未来几十年向大气中释放的二氧化碳累积量相当于2005年卡特里娜飓风造成的排放量（105 Tg），相当于目前全球化石燃料燃烧产生的年碳排放量的102%。氮的损失是2007年加州大火（2.5 × 10−2 Tg）的两倍。氮损失的很大一部分（14%）是以一氧化二氮的形式存在的，这会影响大气臭氧层。
We have applied a scalable and extensible geo‐fluid model (SEGMENT) that considers soil mechanics, vegetation transpiration and root mechanical reinforcement, and hydrological processes to simulate two dimensional maps of the landslides occurrence following the 2008 Wenchuan earthquake. Modeled locations and areas generally agree with observations. The model suggests that the potential energy of earth was lowered by 1.52 × 1015 J by these landslides. With this, the vegetation destroyed transfer ∼235 Tg C to the dead respiring pool and transforms 5.54 × 10−2 Tg N into unavailable sediments pools and the atmosphere. The cumulative CO2 release to the atmosphere over the coming decades is comparable to that caused by hurricane Katrina 2005 (∼105 Tg) and equivalent to ∼2% of current annual carbon emissions from global fossil fuel combustion. The nitrogen loss is twice as much as that released by the 2007 California Fire (∼2.5 × 10−2 Tg). A significant proportion of the nitrogen loss (14%) is in the form of nitrous oxide, which can affect the atmospheric ozone layer.