| Estimates of dry and wet deposition using tissue N contents and 15N natural abundance in epilithic mosses in atmospheric NHy‐dominated areas | |
| Hua‐Yun Xiao; Cong‐Qiang Liu | |
| 2011 | |
| Source Publication | Journal of Geophysical Research
 |
| Volume | 116Issue:D3 |
| Other Abstract | Measurement of dry N deposition by physical methods is time‐consuming because it is usually difficult to measure directly. In this study, an alternative approach has successfully been proposed by coupling isotopic ratios with tissue N contents of epilithic mosses. The method is to use moss N contents to quantitatively estimate total N (TN) deposition and then to use 15N natural abundance in mosses to discriminate dry and wet deposition in atmospheric NHy‐dominated areas (NHy /TN > 0.75). On the basis of the isotopic balance between atmospheric NHy and moss tissue N and the correlation between atmospheric NHy concentrations and their isotopes, both wet and dry N deposition can be estimated. By the approach, we have estimated rainwater ammonium concentrations and contribution percentage of wet deposition to total N deposition ( fwet) in some areas of southern China. The results indicated that rainwater ammonium concentrations increased relative to those reported previously in most cities, owing to stronger anthropogenic activity. The fwet values estimated in most sites were found to be slightly higher than those reported, because faster transformation rates due to higher SO2 emission later in acid rain areas of southern China favored deposition in the form of wet deposition instead of dry deposition. The largest uncertainty of the approach comes from the influence of NOx in the atmosphere, and thus it cannot be used in areas where NOx deposition is high. The presented isotopic approach represents a new application of moss biomonitoring for estimating atmospheric N deposition in NHy‐dominated areas. |
| Subject Area | 环境地球化学 |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/7012 |
| Collection | 环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文 |
| Recommended Citation GB/T 7714 | Hua‐Yun Xiao,Cong‐Qiang Liu. Estimates of dry and wet deposition using tissue N contents and 15N natural abundance in epilithic mosses in atmospheric NHy‐dominated areas[J]. Journal of Geophysical Research,2011,116(D3). |
| APA | Hua‐Yun Xiao,&Cong‐Qiang Liu.(2011).Estimates of dry and wet deposition using tissue N contents and 15N natural abundance in epilithic mosses in atmospheric NHy‐dominated areas.Journal of Geophysical Research,116(D3). |
| MLA | Hua‐Yun Xiao,et al."Estimates of dry and wet deposition using tissue N contents and 15N natural abundance in epilithic mosses in atmospheric NHy‐dominated areas".Journal of Geophysical Research 116.D3(2011). |
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| Estimates of dry and（360KB） | 开放获取 | License | View Application Full Text | |||
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