| Li Haili,Ke Changqing,Zhu Qinghui,Shu Su. 2019. Spatial-temporal variations in net primary productivity in the Arctic from 2003 to 2016. Acta Oceanologica Sinica, 38(8):111－121 |
| Spatial-temporal variations in net primary productivity in the Arctic from 2003 to 2016 |
| 2003-2016年北极净初级生产力时空变化 |
| Received:March 26, 2018 |
| DOI：10.1007/s13131-018-1274-5 |
| Key words:sea ice open water area chlorophyll a net primary productivity Arctic |
| 中文关键词: sea ice open water area chlorophyll a net primary productivity Arctic |
| 基金项目:The National Key Research and Development Program of China under contract No. 2016YFA0600102; the National Natural Science Foundation of China under contract No. 41371391; the Consulting Research Project of Chinese Academy of Engineering under contract No. 2016-XZ-15. |
| Author Name | Affiliation | E-mail | | Li Haili | Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing 210023, China
School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China | | | Ke Changqing | Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing 210023, China
School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China
Collaborative Innovation Center of Novel Software Technology and Industrialization, Nanjing 210023, China | kecq@nju.edu.cn | | Zhu Qinghui | Navigation College, Dalian Maritime University, Dalian 116026, China | | | Shu Su | Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing 210023, China
School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China | |
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| Abstract: |
| The area of Arctic sea ice has dramatically decreased, and the length of the open water season has increased; these patterns have been observed by satellite remote sensing since the 1970s. In this paper, we calculate the net primary productivity (NPP, calculated by carbon) from 2003 to 2016 based on sea ice concentration products, chlorophyll a (Chl a) concentration, photosynthetically active radiation (PAR), sea surface temperature (SST), and sunshine duration data. We then analyse the spatiotemporal changes in the Chl a concentration and NPP and further investigate the relations among NPP, the open water area, and the length of the open water season. The results indicate that (1) the Chl a concentration increased by 0.025 mg/m3 per year; (2) the NPP increased by 4.29 mg/(m2·d) per year, reaching a maximum of 525.74 mg/(m2·d) in 2016; and (3) the Arctic open water area increased by 57.23×103 km2/a, with a growth rate of 1.53 d/a for the length of the open water season. The annual NPP was significantly positively related to the open water area, the length of the open water season and the SST. The daily NPP was also found to have a lag correlation with the open water area, with a lag time of two months. With global warming, NPP has maintained an increasing trend, with the most significant increase occurring in the Kara Sea. In summary, this study provides a macroscopic understanding of the distribution of phytoplankton in the Arctic, which is valuable information for the evaluation and management of marine ecological environments. |
| 中文摘要: |
| 自20世纪70年代以来，卫星遥感观测到北极海冰面积剧烈减少，开阔水域面积迅速增加，开阔水域季节天数增多。本文利用海冰密集度产品、叶绿素a浓度、光合有效辐射、海水表面温度以及光照时长数据，计算了2003-2016年净初级生产力，分析了叶绿素a浓度和净初级生产力的时空变化，并进一步探讨了净初级生产力与开阔水域面积和开阔水域季节长度的关系。结果表明（1）叶绿素a浓度平均每年提高0.025 mg m-3。（2）净初级生产力每年增加4.29 mg C m-2 d-1，2016年达到最大值525.74 mg C m-2 d-1。（3）北极开阔水域面积平均每年增加57.23×103 km2，开阔水域季节长度增长速度为1.53天/年。年净初级生产力与开阔水域面积、季节长度以及海表面温度均显著相关，且开阔水域面积与日NPP存在滞后相关，滞后时间为2个月。伴随着温室效应，NPP保持增加的趋势，喀拉海为NPP的增加贡献最大。本文为了解北极浮游植物的分布提供了宏观的认识，为海洋生态环境的评估和管理提供宝贵的信息支持。 |
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