| Zhuang Yanpei,Li Hongliang,Jin Haiyan,Gao Shengquan,Chen Jianfang,Li Yangjie,Bai Youcheng,Ji Zhongqiang. 2020. Vertical distribution of nutrient tracers in the western Arctic Ocean and its relationship to water structure and biogeochemical processes. Acta Oceanologica Sinica, 39(9):109－114 |
| Vertical distribution of nutrient tracers in the western Arctic Ocean and its relationship to water structure and biogeochemical processes |
| 西北冰洋营养盐示踪参数的垂直分布及其与水团和生地化过程的关系 |
| Received:May 20, 2019 |
| DOI：10.1007/s13131-020-1651-8 |
| Key words:nutrients N* Si* Canada Basin Arctic Ocean |
| 中文关键词: N* Si* 加拿大海盆 北冰洋 |
| 基金项目:The National Natural Science Foundation of China under contract Nos 41941013, 41776205, 41976226 and 41806228; the Scientific Research Funds of Second Institute of Oceanography, Ministry of Natural Resources, under contract No. QNYC2003; the Chinese Polar Environment Comprehensive Investigation & Assessment Programs under contract Nos 0304 and 0402. |
| Author Name | Affiliation | E-mail | | Zhuang Yanpei | Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519080, China | | | Li Hongliang | Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519080, China | | | Jin Haiyan | Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China | jinhaiyan@sio.org.cn | | Gao Shengquan | Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China | | | Chen Jianfang | Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China | jfchen@sio.org.cn | | Li Yangjie | Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China | | | Bai Youcheng | Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China | | | Ji Zhongqiang | Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China | |
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| Abstract: |
| During the 3rd Chinese National Arctic Research Expedition cruise in the summer of 2008, nutrients (${\rm{NO}}_3^ - $, ${\rm{NO}}_2^ - $, ${\rm{SiO}}_3^ {2-}\! $, and ${\rm{PO}}_4^ {3-} \!$) and dissolved oxygen were measured in the western Arctic Ocean, to derive the vertical distribution of nutrient tracers and its relationship to water structure and biogeochemical processes. The nutrient data show that surface waters had the lowest ${\rm{NO}}_3^ - \!$/${\rm{PO}}_4^ {3-} $ (mean of 0.5) and ${\rm{SiO}}_3^ {2-} \!$/${\rm{PO}}_3^ {-} $ (mean of 2.8) values in the water column, suggesting an excess of phosphate. Winter Bering Shelf water (wBSW) had high Si* (16.7 μmol/L; Si*=[Si(OH)4]–[${\rm{NO}}_3^ - $]) with negative N* (-11.7 μmol/L; N*=[${\rm{PO}}_4^ {3-} $]-16[${\rm{PO}}_4^ {3-} $]+3.5 μmol/L) in the water column, indicating nitrate deficiency. The warm Atlantic layer had positive N* (0.8 μmol/L) and negative Si* (-5.4 μmol/L) compared with Pacific source water. The vertical distribution of nutrients indicates that wBSW can be characterized by N* minimum and Si* maximum. In contrast, minima of Si* and ${\rm{SiO}}_3^ {2-}\! $/${\rm{PO}}_4^ {3-} $ below 200 m indicate the distribution of Atlantic warm water. |
| 中文摘要: |
| 本文依托2008夏季中国第三次北极科学考察，通过对西北冰洋的营养盐和溶解氧的观测，利用NO3-/PO43-比、SiO32-/PO43-比、NO/PO及N*和Si*值来表征加拿大海盆不同水团的营养盐参数的分布特征，以期更好地指示水体结构和生物地球化学过程。结果表明调查期间表层淡化层在垂向上具有最低的氮磷比和硅磷比，平均值分别为0.5和2.8，暗示磷酸盐相对于硝酸盐和硅酸盐远远过剩。冬季白令海陆架水（wBSW）具有的N*值和Si*值平均分别为16.8、-11.7 μM和16.7 μM，暗示wBSW的硝酸盐亏损。与wBSW相比，大西洋层（AL）的NO3-/PO43-、N*和Si*的平均值分别为13.1、0.8 μM和-5.4 μM。示踪参数的垂直分布表明N*极小值和Si*极大值能够指示冬季白令海陆架水（wBSW）的分布，而Si*极小值和200 m之下的SiO32-/PO43-比极小值则表征了大西洋暖水的特征。 |
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