Variation in recent annual snow deposition and seasonality of snow chemistry at the east Greenland ice core project (EGRIP) camp, Greenland
Variation in recent annual snow deposition and seasonality of snow chemistry at the east Greenland ice core project (EGRIP) camp, Greenland
复制标题
格陵兰岛东格陵兰冰芯项目（EGRIP）营地最近年积雪的变化和雪化学的季节性
DOI：
10.1016/j.polar.2020.100597
复制
发表时间：
2021
期刊：
影响因子：
1.8
通讯作者：
Dorthe Dahl-Jensen
中科院分区：
文献类型：
--
作者：
Fumio Nakazawa;Naoko Nagatsuka;Motohiro Hirabayashi;Kumiko Goto-Azuma;Jørgen Peder Steffensen;Dorthe Dahl-Jensen
我们于2016年夏天在格陵兰岛东格陵兰冰芯项目营地（75°37′N，35°59′W）收集了两个深度为4.02和3.18 m的坑中的雪样本，以估计最近的年度雪沉积，并检查主要离子种类，水和微粒（灰尘）的稳定同位素的季节变化。基于化学成分明显的季节性变化的年代测定表明，4.02米和3.18米深的坑包括分别对应于2006年至2016年10年和2009年至2016年7年的雪沉积。4.02米深的坑的年积雪平均值分别为138和145 mm yr− 1 in water equivalent（mm w.e.）。2006-2016年和2009-2016年分别为-1年）。3.18米深的坑的平均沉积物为149毫米湿当量。2009年至2016年期间为1年。主要离子种类和灰尘浓度的季节性变化与以前报告的格陵兰岛相似。夏季的最大Cl−/Na+浓度比远高于格陵兰其他地点的比值。
We collected snow samples from two pits with depths of 4.02 and 3.18 m at the East Greenland Ice Core Project camp (75°37′N, 35°59′W), Greenland in the summer of 2016 to estimate recent annual snow deposition and examine seasonal variation in major ion species, stable isotopes of water and microparticles (dust). Dating based on clear seasonal variation in chemical components indicated that the 4.02- and 3.18-m-deep pits included snow deposition corresponding to ten years from 2006 to 2016 and seven years from 2009 to 2016, respectively. The mean values for annual snow deposition for the 4.02-m-deep pit were 138 and 145 mm yr−1in water equivalent (mm w.e. Yr−1) in 2006–2016 and 2009–2016, respectively. The average deposition for the 3.18-m-deep pit was 149 mm w.e. Yr−1between 2009 and 2016. Seasonal variation in concentrations of major ion species and dust were similar to those previously reported for Greenland. The maximum Cl−/Na+concentration ratios in the summer were much higher than the ratios at other sites in Greenland.