High-resolution net and gross biological production during a Celtic Sea spring bloom
High-resolution net and gross biological production during a Celtic Sea spring bloom
复制标题
凯尔特海春季水华期间的高分辨率净生物产量和总生物产量
DOI：
10.1016/j.pocean.2017.12.003
复制
发表时间：
2017
影响因子：
4.1
通讯作者：
J. Kaiser
中科院分区：
文献类型：
--
作者：
I. Seguro;A. Marca;S. Painting;J. Shutler;D. Suggett;J. Kaiser
陆架海仅占海洋面积的10%，但支撑着所有海洋初级生产的30%。在这种异质性和物理动态系统中，很少有高时空分辨率的陆架-海生物生产测量。在这里，我们使用溶解氧对氩（O2/Ar）比率和氧三重同位素（16O,17O,18O）来估计2015年春季凯尔特海的净生物产量和总生物产量。O2/Ar比值使用船载膜进口质谱仪（MIMS）连续测量。另外，利用CTD水铸体的离散水样测量了O2/Ar深度剖面和溶解O2的δ(17O)和δ(18O)值。这些高分辨率数据与基于风速的气体交换参数化相结合，以计算生物驱动的空气-海洋氧通量。在校正了不平衡项和下游扩散后，这些通量得到了净群落（N(O2/Ar)）和总O2生产量（G(17O)）的估计。N（O2/Ar）在空间上是异质的，主要表现为自养条件，平均为（33 ± 41）mmol m−2d−1。G（17O）在0和424 mmol m−2d−1之间表现出很高的变异性。n （O2/Ar）与g （17O）的比值为（0.18 ± 0.03），对应碳当量为0.34 ± 0.06。我们还观察到快速的时间变化inN(O2/Ar)，例如在春季开花期间增加80 mmol m−2d−1in <6 h，突出了高分辨率生物生产测量的重要性。这种测量将有助于调和卫星和实地生产力观测之间的差异，并提高我们对生物碳泵的理解。
Shelf seas represent only 10% of the ocean area, but support up to 30% of all oceanic primary production. There are few measurements of shelf-sea biological production at high spatial and temporal resolution in such heterogeneous and physically dynamic systems. Here, we use dissolved oxygen-to-argon (O2/Ar) ratios and oxygen triple isotopes (16O,17O,18O) to estimate net and gross biological production in the Celtic Sea during spring 2015. O2/Ar ratios were measured continuously using a shipboard membrane inlet mass spectrometer (MIMS). Additional discrete water samples from CTD hydrocasts were used to measure O2/Ar depth profiles and theδ(17O) andδ(18O) values of dissolved O2. These high-resolution data were combined with wind-speed based gas exchange parameterisations to calculate biologically driven air-sea oxygen fluxes. After correction for disequilibrium terms and diapycnal diffusion, these fluxes yielded estimates of net community (N(O2/Ar)) and gross O2production (G(17O)).N(O2/Ar) was spatially heterogeneous and showed predominantly autotrophic conditions, with an average of (33 ± 41) mmol m−2d−1.G(17O) showed high variability between 0 and 424 mmol m−2d−1. The ratio ofN(O2/Ar) toG(17O),ƒ(O2), was (0.18 ± 0.03) corresponding to 0.34 ± 0.06 in carbon equivalents. We also observed rapid temporal changes inN(O2/Ar), e.g. an increase of 80 mmol m−2d−1in <6 h during the spring bloom, highlighting the importance of high-resolution biological production measurements. Such measurements will help reconcile the differences between satellite and in situ productivity observations, and improve our understanding of the biological carbon pump.
登录
查看更多内容
影响因子：
4.9
作者：
A. Poulton;M. Stinchcombe;E. Achterberg;D. Bakker;C. Dumousseaud;H. Lawson;Gareth A. Lee;S. Richier;D. Suggett;J. Young
通讯作者：
A. Poulton;M. Stinchcombe;E. Achterberg;D. Bakker;C. Dumousseaud;H. Lawson;Gareth A. Lee;S. Richier;D. Suggett;J. Young
影响因子：
4.1
作者：
Morvan K. Barnes;G. Tilstone;D. Suggett;C. Widdicombe;J. Bruun;V. Martínez-Vicente;T. Smyth
通讯作者：
Morvan K. Barnes;G. Tilstone;D. Suggett;C. Widdicombe;J. Bruun;V. Martínez-Vicente;T. Smyth
在西北欧陆架海周围进行的船上碳酸盐化学操作实验期间浮游植物的反应和相关的碳循环
影响因子：
4.9
作者：
Richier S
通讯作者：
Richier S
技术说明：根据氧三重同位素测量对水产总产量进行一致计算
影响因子：
4.9
作者：
Kaiser J
通讯作者：
Kaiser J