Impact of mesoscale eddies on particulate organic carbon flux in the western subarctic North Pacific
Impact of mesoscale eddies on particulate organic carbon flux in the western subarctic North Pacific
复制标题
中尺度涡旋对北太平洋亚北极西部颗粒有机碳通量的影响
DOI：
10.1007/s10872-021-00620-7
复制
发表时间：
2021
影响因子：
2.3
通讯作者：
Harada Naomi
中科院分区：
文献类型：
--
作者：
Dobashi Ryo;Ueno Hiromichi;Matsudera Nozomi;Fujita Isao;Fujiki Tetsuichi;Honda Makio C.;Harada Naomi
控制深海中颗粒有机碳（POC）通量的机制因季节和海洋而异。已知亚北极北太平洋西部产生的POC可以有效地输送到深海，但POC通量与物理过程之间的直接关系尚不清楚。在本研究中，我们评估了中尺度涡旋对北太平洋亚北极西部地区POC通量的影响。利用K2站（47°N, 160°E） 4810 m时间序列沉积物捕集器2005 - 2018年的数据，研究了POC通量的季节和年际变化。POC通量在5月至11月期间较高，似乎反映了春季和秋季海洋表面的水华。POC通量也表现出年际变化，有12个峰在峰前受增强华的影响最大。12个峰中有9个峰受中尺度涡旋的影响，通过将沿海地区叶绿素浓度高的区域扩展到近海区域，增强了K2周围的水华，表明中尺度涡旋对K2 POC通量的年际变化有强烈的影响。
The mechanism that controls particulate organic carbon (POC) flux in the deep sea differs depending on the season and sea. The POC produced in the western subarctic North Pacific are known to be transported to the deep sea efficiently, but the direct relationship between the POC flux and physical processes is still unclear. In this study, we evaluated the effect of mesoscale eddies on POC flux in the western subarctic North Pacific. The seasonal and interannual variabilities of POC flux were investigated using data from a time-series sediment trap deployed at 4810 m at station K2 (47°N, 160°E) from 2005 to 2018. POC flux was high during May–November, appearing to reflect spring and fall blooms at the ocean surface. POC flux also showed interannual variability, with twelve peaks that were mostly affected by enhanced bloom just before the peak. Nine peaks of the twelve peaks were affected by mesoscale eddies, which enhanced bloom around K2 by extending the area with a high chlorophyll-aconcentration along the coastal region into the offshore region, suggesting that mesoscale eddies strongly impact the interannual variability of POC flux at K2.