Mapping the forest litterfall mercury deposition in China
文献类型：期刊论文
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| 作者 | Xu, Zehua ; Wang, Zhangwei; Zhang, Xiaoshan
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 2022-09-15 |
| 卷号 | 839期号:0页码:156288 |
| 关键词 | GASEOUS ELEMENTAL MERCURY REMOTE UPLAND FOREST ATMOSPHERIC MERCURY BROADLEAF FORESTS DRY DEPOSITION DYNAMICS CANOPY POLLUTION FLUXES POOLS |
| ISSN号 | 0048-9697 |
| 英文摘要 | Litterfall mercury (Hg) deposition represents one of the biggest Hg inputs to forest ecosystems through assimilation of atmospheric gaseous elemental Hg (Hg-0) to foliage. However, due to the availability of litterfall production and Hg concentration data, a comprehensive quantification of litterfall Hg deposition is still lacking in China. In this study, the forest litterfall production of five major forest types in China was modeled by using the random forest (RF) method and multi-source datasets. A substantial nationwide dataset of litterfall Hg concentration was compiled including the investigation of our research group and previous published data. The litterfall Hg flux of forest was quantified by integrating litterfall production map and litterfall Hg concentration data. The nationwide litterfall Hg concentration ranged from 12.75 to 178.00 ng g(-1) with a mean of 51.99 +/- 34.23 ng g(-1). For litterfall production, the mean value was simulated to be 5.07 Mg ha(-1) yr(-1), with the highest values in tropical areas and the lowest in the northeast and northwest arid regions. The litterfall Hg flux of forest in China was characterized by high in the south and low in the north, ranging from 5.57 to 137.05 mu g m(-2) yr(-1), with an average value of 25.88 +/- 12.53 mu g m(-2) yr(-1). Total Hg deposition from forest litterfall in China was estimated to be 27.0 +/- 13.0 Mg yr(-1), and that of evergreen broadleaf forest, mixed forest, deciduous broadleaf forest, evergreen needleleaf forest and deciduous needleleaf forest were 10.8 +/- 5.3 Mg yr(-1), 8.5 +/- 4.0 Mg yr(-1), 6.1 +/- 2.6 Mg yr(-1), 1.5 +/- 1.0 Mg yr(-1) and 0.2 +/- 0.1 Mg yr(-1), respectively. This is the primary quantitative evaluation of the forest litterfall Hg deposition in China, which is essential for understanding the role and status of Chinese forest in the global Hg cycle. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47298]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 通讯作者 | Zhang, Xiaoshan |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Zehua,Wang, Zhangwei,Zhang, Xiaoshan. Mapping the forest litterfall mercury deposition in China, Mapping the forest litterfall mercury deposition in China.pdf[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,839(0):156288. |
| APA | Xu, Zehua,Wang, Zhangwei,&Zhang, Xiaoshan.(2022).Mapping the forest litterfall mercury deposition in China.SCIENCE OF THE TOTAL ENVIRONMENT,839(0),156288. |
| MLA | Xu, Zehua,et al."Mapping the forest litterfall mercury deposition in China".SCIENCE OF THE TOTAL ENVIRONMENT 839.0(2022):156288. |
入库方式： OAI收割
来源：生态环境研究中心
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