Atmospheric deposition of nitrogen to the Baltic Sea in the period 1995-2006
Atmospheric deposition of nitrogen to the Baltic Sea in the period 1995-2006
复制标题
DOI：
10.5194/acp-11-10057-2011
复制
发表时间：
2011-01-01
影响因子：
6.3
通讯作者：
Fagerli, H.
中科院分区：
文献类型：
--
作者：
Bartnicki, J.;Semeena, V. S.;Fagerli, H.
利用EMEP/MSC-W模式计算了1995-2006年12年间波罗的海海盆的大气氮沉降。波罗的海海盆年总氮沉降量从1995年的230ggn减少到2006年的199ggn，减少了13%。这一数值与HELCOM缔约方的总氮排放量减少（11%）非常吻合。而波罗的海盆地氮沉降年际变化较大，为平均值的- 13% ~ + 17%。其主要原因是气象条件的变化，尤其是研究时段内降水的变化。计算的月沉积格局在大多数年份相似，在秋季的10月和11月达到最大值。计算了1997-2006年每年向波罗的海盆地大气氮沉降的源分配预算。贡献总氮沉降的主要排放源为：德国18- 22%，波兰11- 13%，丹麦8- 11%。还有一个重要的贡献来自遥远的来源，如英国6- 9%，以及来自波罗的海的国际船舶交通4- 5%。
The EMEP/MSC-W model has been used to compute atmospheric nitrogen deposition into the Baltic Sea basin for the period of 12 yr: 1995-2006. The level of annual total nitrogen deposition into the Baltic Sea basin has changed from 230 GgN in 1995 to 199 GgN in 2006, decreasing 13 %. This value corresponds well with the total nitrogen emission reduction (11 %) in the HELCOM Contracting Parties. However, inter-annual variability of nitrogen deposition to the Baltic Sea basin is relatively large, ranging from -13 % to +17 % of the averaged value. It is mainly caused by the changing meteorological conditions and especially precipitation in the considered period. The calculated monthly deposition pattern is similar for most of the years showing maxima in the autumn months October and November. The source allocation budget for atmospheric nitrogen deposition to the Baltic Sea basin was calculated for each year of the period 1997-2006. The main emission sources contributing to total nitrogen deposition are: Germany 18-22 %, Poland 11-13 % and Denmark 8-11 %. There is also a significant contribution from distant sources like the United Kingdom 6-9 %, as well as from the international ship traffic on the Baltic Sea 4-5 %.