Particle-tracking experiments of coastal-origin sea ice that could induce high biological productivity in the Sea of Okhotsk
Particle-tracking experiments of coastal-origin sea ice that could induce high biological productivity in the Sea of Okhotsk
复制标题
沿海海冰的粒子追踪实验可提高鄂霍次克海的生物生产力
DOI：
10.1007/s10872-022-00670-5
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发表时间：
2022
影响因子：
2.3
通讯作者：
Fukamachi Yasushi
中科院分区：
文献类型：
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作者：
Kuga Mizuki;Ohshima Kay I.;Kimura Noriaki;Nakata Kazuki;Fukamachi Yasushi
在鄂霍次克海西南部，海冰融化后，春季浮游植物大量繁殖。一种设想是，含有含铁沉积物或冰藻等物质的海冰从北方运来，并随着释放而融化，导致明显的水华。我们假设，海冰包含的材料，可以提高春季水华起源于活跃的沿海冰穴在上游地区。为了验证这一假设，并确定哪些沿海地区产生的海冰进一步输送到水华地区，我们模拟了由粒子跟踪方法在沿海冰穴产生的海冰的运输。海冰的产生和漂移速度是从卫星微波数据推导出来的。对于海岸附近的地区，来自卫星的冰漂移数据是不准确的，我们结合了来自风的冰漂移数据，使用风因子和转向角从系泊数据。此外，我们使用的表观风因子表示增强沿岸组件的冰漂移的洋流。模拟表明，在千岛盆地西部融化的大部分海冰来自特尔斐湾和库页岛冰穴。海冰融化后出现高净群落生产的区域与源于这些冰穴的海冰融化的区域相对应。冰碛冰的模拟表明，来自Terbal湾冰间湖的融冰具有较高的冰碛冰生产率。
In the southwestern Sea of Okhotsk, a large spring phytoplankton bloom occurs after the sea ice melts. A suggested scenario is that sea ice with materials such as iron-containing sediment or ice algae is transported from the north and melted with release of them, inducing a prominent bloom. We hypothesize that sea ice containing materials that could enhance spring bloom originates from active coastal polynyas in the upstream region. To verify this hypothesis and identify which coastal areas generate sea ice that is further transported to the bloom area, we simulated the transport of sea ice produced in the coastal polynyas by a particle-tracking method. Sea ice production and drift velocity were derived from satellite microwave data. For regions near the coast, where ice drift data derived from the satellite are inaccurate, we combined ice drift data derived from the wind using the wind factor and the turning angle obtained from mooring data. Further, we used the apparent wind factor that expresses enhancement of the alongshore component of ice drift by the ocean current. The simulations suggest that most of the sea ice that melts in the western Kuril Basin originates from the Terpenia Bay and Sakhalin polynyas. The area where high net community production occurs after the sea ice melts corresponds well to the area where sea ice originating from these polynyas melts. The simulation of frazil ice suggests the importance of melt ice originating from the Terpenia Bay polynya with a higher rate of frazil ice production.