Knowledge Resource Center for Ecological Environment in Arid Area
| Nitrogen land-sea fluxes in the Baltic Sea catchment : Empirical relationships and budgets | |
| Eriksson Hägg;Hanna | |
| 出版年 | 2010 |
| 学位授予单位 | Stockholms universitet, Institutionen för tillämpad miljövetenskap (ITM), Stockholm : Department of Applied Environmental Science (ITM) |
| 英文摘要 | In this thesis empirical relationships and modeling tools are used to describe the relationship between human activities and meso- and large scale riverine N fluxes from land to sea. On a large scale Paper I showed that by only having knowledge about human population size and runoff one can estimate the riverine export of DIN (r2= 0.76). In Paper II we included two other important anthropogenic N inputs, i.e. atmospheric deposition and primary emission (PE) from animals. In most of the catchments the PE from animals were larger than the PE from humans. Hence, development of livestock is important and increased animal protein consumption by humans might increase the riverine N export. Scenario analysis (Paper II) show that climate change is expected to both decrease and increase the riverine N export depending on which part of the catchment is modeled. In the southern and eastern parts of the Baltic Sea catchment there is large potential for N reductions from point sources (Papers III & V). The diffuse sources are more difficult to decrease and a reduction of mineral fertilizer does not always lead to reduced N loadings because the agricultural systems can buffer even a slight surplus (Paper III). There is inertia in the catchments which can be seen in for example in the northern part of the catchment. Here atmospheric N deposition is almost as high as in the southern part but the nitrogen flux from these rivers is not elevated. These northern river catchments have N exports of the same magnitude as the natural background (Paper IV), indicating that the atmospheric N deposition is retained in the system and probably taken up by N limited boreal forests. However, important reductions can be achieved in the agricultural sector by detailed management of the planted land and animal manure. The highest sensitivity is in catchments with high animal density and high specific discharge, primarily draining to Kattegat and Danish Straits (Paper II & IV). At the time of doctoral dissertation the following publications were unpublished and had a status as follows: Paper 2: Manuscript. Paper 4: Manuscript |
| 英文关键词 | Nitrogen fluxes Baltic Sea Primary emissions Riverine export Scenario analysis Climate change Animal protein consumption Fertilizer use Environmental chemistry Milj?kemi |
| 语种 | 英语 |
| URL | http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-32493 |
| 来源机构 | Stockholms universitet |
| 资源类型 | 学位论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/244857 |
| 推荐引用方式 GB/T 7714 | Eriksson Hägg;Hanna. Nitrogen land-sea fluxes in the Baltic Sea catchment : Empirical relationships and budgets[D]. Stockholms universitet, Institutionen för tillämpad miljövetenskap (ITM), Stockholm : Department of Applied Environmental Science (ITM),2010. |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [Eriksson Hägg;Hanna]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [Eriksson Hägg;Hanna]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [Eriksson Hägg;Hanna]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
