A 800 year record of nitrate from the Lomonosovfonna ice core, Svalbard
A 800 year record of nitrate from the Lomonosovfonna ice core, Svalbard
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斯瓦尔巴群岛罗蒙诺索夫纳冰芯 800 年来的硝酸盐记录
DOI：
10.3189/172756402781817121
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发表时间：
2002
影响因子：
2.9
通讯作者：
R. V. D. van de Wal
中科院分区：
文献类型：
--
作者：
T. Kekonen;J. Moore;R. Mulvaney;E. Isaksson;V. Pohjola;R. V. D. van de Wal
对海拔122米、海拔相对较高、融化程度较低的罗蒙诺索夫丰纳冰芯进行了详细的化学分析，提供了斯瓦尔巴特群岛硝酸盐的最佳年代记录。记录中存在的一个非常显著的非线性趋势表明：（a）浓度从12世纪到16世纪中期上升，（B）浓度在19世纪中期之前相当稳定，（c）浓度在20世纪上升，（d）在1950年代迅速上升，（e）在1980年代中期之后下降。1920年之前和1960年之后，硝酸盐与铵态氮有很好的相关性，但在此期间没有相关性。铵和硝酸盐浓度之间的相关性表明，硝酸铵（NH4NO3）在罗蒙诺索夫峰是常见的。在地核中也有硝酸盐与钙密切相关的地方。
Abstract Detailed chemical analysis of the 122 m, relatively high-altitude and low-melt Lomonosovfonna ice core provides the best-dated record of nitrate from Svalbard. A very significant non-linear trend present in the record shows: (a) a rise in concentrations from the 12th to the mid-16th century, (b) reasonably stable concentrations until the mid-19th century, (c) a rise in concentrations into the 20th century, with (d) a rapid rise in the 1950s and (e) a decrease after the mid-1980s. Nitrate is well correlated with ammonium before 1920 and after 1960 but not in the intervening period. the correlation between ammonium and nitrate concentrations indicates that ammonium nitrate (NH4NO3) has been common at Lomonosovfonna. There are also places in the core where nitrate is very closely associated with calcium.