Observation of nitrate deficit along transects across the Canada Basin after major sea-ice loss

Observation of nitrate deficit along transects across the Canada Basin after major sea-ice loss
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海冰大量消失后加拿大盆地横断面硝酸盐赤字的观察

DOI:
10.1016/j.polar.2019.03.001
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发表时间:
2019-09
期刊:
影响因子:
1.8
通讯作者:
Li Yangjie
Li Yangjie
中科院分区:
地球科学4区
文献类型:
--
作者:
Zhuang Yanpei;Li Hongliang;Jin Haiyan;Chen Jianfang;Gao Shengquan;Bai Youcheng;Ji Zhongqiang;Li Yangjie

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2005-2008年,在加拿大盆地(75°-85 ° N)沿沿着相似的跨流域样带收集营养数据,以评估硝酸盐赤字的长期变化。结果显示,地下N* 最小值(<−10 μmol/kg),表明盆地上部盐跃层水中存在大量硝酸盐缺乏。2005 - 2008年N* 的年际变化表明,硝酸盐赤字的增加。地下低N * 沃茨正在扩大,特别是在加拿大海盆南部(75°-80 ° N)。太平洋水的增厚分布是该盆地硝酸盐赤字扩大的主要原因。
Nutrient data were collected along similar cross-basin transects in the Canada Basin (75°–85°N) in 2005–2008, to evaluate the long-term change in the nitrate deficit. The results revealed a subsurface N* minimum (<−10 μmol/kg), indicating a large nitrate deficit in the upper halocline water of the basin. The interannual change of N* from 2005 to 2008 demonstrates the increase in the nitrate deficit. The subsurface low-N* waters are expanding, especially in the southern Canada Basin (75°–80°N). The thickening distribution of Pacific water is primarily responsible for the expansion of the nitrate deficit in the basin.
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