Physical associations to spring phytoplankton biomass interannual variability in the U.S. Northeast Continental Shelf
Physical associations to spring phytoplankton biomass interannual variability in the U.S. Northeast Continental Shelf
复制标题
美国东北大陆架春季浮游植物生物量年际变化的物理关联
DOI：
10.1002/2014jg002770
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
M. Fogarty
中科院分区：
文献类型：
--
作者：
V. Saba;K. Hyde;N. D. Rebuck;K. Friedland;J. Hare;M. Kahru;M. Fogarty
美国东北部和新斯科舍省的大陆架是一个多产的海洋生态系统，支持着海洋生物资源的强大生物量。了解海洋生态系统对物理环境变化的敏感性可以从海洋食物网的基础浮游植物(即叶绿素a)的一级反应开始。然而，这些水域中叶绿素a年际变化的主要物理联系尚不清楚。在这里，我们使用海洋颜色卫星测量，并确定了从1998年到2013年春季表面叶绿素a年际变化的本地和远程物理联系。叶绿素a的年际变异性最大出现在3月和4月，分别出现在乔治斯浅滩北侧、缅因州西部海湾和楠塔基特浅滩。大陆架冬季风速、当地冬季水位和前一年夏/秋进入缅因湾的大西洋和拉布拉多海源水的相对比例之间的复杂相互作用与乔治斯海岸和缅因湾3/4月叶绿素a的变化有关。冬季表层硝酸盐与叶绿素a或物理变量的相关性不强，表明硝酸盐限制可能不是所有地区春季水华年际变化的主要制约因素。广义线性模型表明，我们可以使用滞后的物理数据来解决乔治斯浅滩3月份88%的叶绿素a年际变化。
The continental shelf of the Northeast United States and Nova Scotia is a productive marine ecosystem that supports a robust biomass of living marine resources. Understanding marine ecosystem sensitivity to changes in the physical environment can start with the first‐order response of phytoplankton (i.e., chlorophyll a), the base of the marine food web. However, the primary physical associations to the interannual variability of chlorophyll a in these waters are unclear. Here we used ocean color satellite measurements and identified the local and remote physical associations to interannual variability of spring surface chlorophyll a from 1998 to 2013. The highest interannual variability of chlorophyll a occurred in March and April on the northern flank of Georges Bank, the western Gulf of Maine, and Nantucket Shoals. Complex interactions between winter wind speed over the Shelf, local winter water levels, and the relative proportions of Atlantic versus Labrador Sea source waters entering the Gulf of Maine from the previous summer/fall were associated with the variability of March/April chlorophyll a in Georges Bank and the Gulf of Maine. Sea surface temperature and sea surface salinity were not robust correlates to spring chlorophyll a. Surface nitrate in the winter was not a robust correlate to chlorophyll a or the physical variables in every case suggesting that nitrate limitation may not be the primary constraint on the interannual variability of the spring bloom throughout all regions. Generalized linear models suggest that we can resolve 88% of March chlorophyll a interannual variability in Georges Bank using lagged physical data.
缅因湾 - 乔治班克地区的营养物和水团：有毒甲藻亚历山大藻繁殖的变异性和重要性。
DOI：
10.1016/j.dsr2.2013.08.003
发表时间：
2014
期刊：
Deep-sea research. Part II, Topical studies in oceanography
影响因子：
--
作者：
Townsend,DW;McGillicuddyJr,DJ;Thomas,MA;Rebuck,NR
通讯作者：
Rebuck,NR