| 全球变化背景下北方泥炭地释放溶解有机碳的驱动机制 |
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| 引用本文： | 向武,Jiasong Fang,万翔,贺灵,孙兴庭,闭向阳.全球变化背景下北方泥炭地释放溶解有机碳的驱动机制[J].地学前缘,2011,18(6):72-78. |
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| 作者姓名： | 向武 Jiasong Fang 万翔 贺灵 孙兴庭 闭向阳 |
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| 作者单位： | 1. 生物地质和环境地质国家重点实验室；中国地质大学武汉,湖北武汉430074
2. Department of Natural Sciences, Hawaii Pacific University, 45-045 Kamehameha Hwy. Kanoehe, HI 96744, USA |
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| 基金项目： | 国家自然科学基金项目“泥炭沼泽土壤热响应过程中酚类物质的作用及其机制”(40772205) |
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| 摘 要： | 泥炭地（peatland）是一类储碳效率很高的特殊陆地生态系统，其碳储量约占全球土壤碳库的近1／3，对全球碳循环有着举足轻重的作用。有证据表明在过去20余年，北半球大范围的天然水体中溶解有机碳的浓度呈显著增升趋势。普遍认为与全球变化背景下北方泥炭地大规模释放溶解有机碳有关，但其驱动机制尚不十分清楚。已经提出的具有代表性...
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| 关 键 词： | 驱动机制 溶解有机碳 泥炭地 全球变化 |
Driving mechanisms for the DOC increases in surface waters released from Northern Peatlands under global change |
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| Xiang Wu,Jiasong Fang,Wan Xiang,He Ling,Sun Xingting,Bi Xiangyang.Driving mechanisms for the DOC increases in surface waters released from Northern Peatlands under global change[J].Earth Science Frontiers,2011,18(6):72-78. |
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| Authors: | Xiang Wu Jiasong Fang Wan Xiang He Ling Sun Xingting Bi Xiangyang |
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| Institution: | 1.State Key Laboratory of Biogeology and Environmental Geology;China University of Geosciences(Wuhan),Wuhan 430074,China 2.Department of Natural Sciences,Hawaii Pacific University,45-045 Kamehameha Hwy.Kanoehe,HI 96744,USA |
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| Abstract: | Peatlands are the most efficient terrestrial ecosystems in storing carbon,which contain approximately one third of the world's soil carbon pool and play an important role in global carbon cycling.During the last two decades,increases in dissolved organic carbon(DOC) concentrations have been observed in freshwaters across large areas of Northern Hemisphere.It is generally considered to be related to large scale DOC releasing from Northern Peatlands.Several hypotheses have been put forward as potential driving mechanisms for the increase in DOC,including(1) changes in temperature;(2) elevated CO2 concentrations;(3) changes in Hydrological processes;(4) Decrease in sulphur deposition.However,none of the proposed hypotheses is completely convincing.After reviewing previous studies,we proposed that the combining forces of temperature and hydrological processes under global change possibly are the main dominant drivers of DOC change,though multiple mechanisms for rising DOC exist. |
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| Keywords: | driving mechanism dissolved organic carbon peatland global change |
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