Impacts of climatic and atmospheric changes on carbon dynamics in the Great Smoky Mountains National Park

详细信息	查看全文 | 推荐本文 |

• 作者：Chi Zhang ; Hanqin Tian ; Arthur H. Chappelka ; Wei Ren ; Hua Chen ; Shufen Pan ; Mingliang Liu ; Diane M. Styers ; Guangsheng Chen ; Yuhang Wang
• 关键词：Carbon storage ; Multiple stresses ; Air pollution ; Ozone ; Carbon dioxide
• 刊名：Environmental Pollution
• 出版年：2007
• 期刊代码：28_02697491
• 类别：env
• 出版时间：October 2007
• 卷：149
• 期：3
• 页码：336-347
• 文件大小：1318 K

摘要

We used the Dynamic Land Ecosystem Model (DLEM) to estimate carbon (C) storage and to analyze the impacts of environmental changes on C dynamics from 1971 to 2001 in Great Smoky Mountain National Park (GRSM). Our simulation results indicate that forests in GRSM have a C density as high as 15.9 kg m⁻², about twice the regional average. Total carbon storage in GRSM in 2001 was 62.2 Tg (T = 10¹²), 54%of which was in vegetation, the rest in the soil detritus pool. Higher precipitation and lower temperatures in the higher elevation forests result in larger total C pool sizes than in forests at lower elevations. During the study period, the CO₂ fertilization effect dominated ozone and climatic stresses (temperature and precipitation), and the combination of these multiple factors resulted in net accumulation of 0.9 Tg C in this ecosystem.