Seasonal and inter-annual variability of net primary production in the NW Iberian margin (1998-2016) in relation to wind stress and sea surface temperature
Seasonal and inter-annual variability of net primary production in the NW Iberian margin (1998-2016) in relation to wind stress and sea surface temperature
复制标题
伊比利亚西北部边缘（1998-2016）净初级生产的季节性和年际变化与风应力和海面温度的关系
DOI：
10.1016/j.pocean.2019.102135
复制
发表时间：
2019
影响因子：
4.1
通讯作者：
Beca-Carretero P
中科院分区：
文献类型：
--
作者：
Beca-Carretero P
1998年至2016年期间，对伊比利亚西北部边缘卫星来源的净初级生产力（NPP）的季节性和年际变化及其与近海埃克曼运输（-Qx）和各种海面温度（SST）指数的关系进行了研究。季节性解释了大陆架和邻近海洋约 55% 的 NPP 变化。邻近海洋的 NPP 峰值出现在 5 月份，而大陆架则推迟到 7 月份。与海洋相比，陆架上的过剩产量（ΔNPP）为0.45±0.02g C m−2d−1，即总NPP的37±2%，并在8月份达到峰值，位于陆架与邻近海洋之间的最大-Qx和最大海温差（ΔSST）之间。在上升流季节，邻近海洋NPP的年际变化与春季层结（SSTstr）和上升流季节的平均-Qx呈正相关，ΔNPP与ΔSST呈负相关。相反，在下降流季节，ΔNPP 与下降流季节的平均分层（SSTdown）相关。从这些回归中获得的 NPP 随气候相关变量（-Qx、ΔSST、SSTstr、SSTdown）的变化率可用于测试伊比利亚西北部上升流生产力对气候变化的敏感性。
Seasonal and inter-annual variability of satellite-derived net primary production (NPP) in the NW Iberian margin and its relationship with the offshore Ekman transport (-Qx) and a variety of sea surface temperature (SST) indices have been examined over the period 1998–2016. Seasonality explained about 55% of NPP variability over the shelf and the adjacent ocean. Maximum NPP rates occurred by May in the adjacent ocean, and were delayed until July over the shelf. The excess production (ΔNPP) over the shelf compared to the ocean domain represented 0.45 ± 0.02 g C m−2d−1or 37 ± 2% of the total NPP and peaked in August, in between the maximum -Qx and the maximum SST difference between the shelf and the adjacent ocean (ΔSST). During the upwelling season, the inter-annual variability of NPP in the adjacent ocean correlated positively with the spring stratification (SSTstr) and the average -Qx over the upwelling season and ΔNPP correlated inversely with ΔSST. Conversely, during the downwelling season, ΔNPP correlated with the average stratification (SSTdown) over the downwelling season. The rates of change of NPP with the climate-related variables (-Qx, ΔSST, SSTstr, SSTdown), obtained from these regressions, may be used to test the sensitivity of the NW Iberian upwelling productivity to climate change.