Collaborative: US-GLOBEC NEP Phase IIIa-CCS: Effects of Meso- and Basin-Scale Variability on Zooplankton Populations in the CCS Using Data-Assimilative, Physical/Ecosystem Models

这些研究旨在阐明确定物理特征如何影响生态系统过程的机制。 研究人员将开发嵌套模型，涵盖整个北太平洋盆地的现象-例如，ENSO和制度转变/PDO相关的功能-并纳入年际到十年时间尺度的变化。 他们将特别关注浮游动物，无论是在个体种群水平上（例如，磷虾类），并在聚集的群落水平上，并采用先进的数据同化（例如，中尺度调查），以产生最佳的合并数据/模式产品，供GLOBEC NEP合成工作使用。 耦合的物理生态系统模式产品将包括动态一致的，数据同化的CCS现场实验和多年的区域和时间的后报，流域尺度，嵌套计算（1970年至今）。 通过这项研究，研究人员试图（i）量化加州海流系统的物理特征和与气候变化相关的变化如何影响浮游动物的生物量，生产，分布，以及沿海地区浮游动物的保留和损失，以及（ii）比较气候变率和变化的影响（如厄尔尼诺-拉尼娜周期和制度转变）对CCS和CGOA中海洋动物种群（磷虾）的影响。 这两种方法都直接响应GLOBEC NEP综合计划的既定目标。此外，该项目将提供多个博士学位的机会。科学家和本科生，直接与PI合作或参加拟议的研讨会，参与GLOBEC合成。

The studies are designed to elucidate mechanisms that determine how physical features influence ecosystem processes. The investigators will develop nested models that encompass phenomena across the entire North Pacific basin -- e.g., ENSO and regime shift/PDO-linked features -- and incorporate variability over interannual to decadal time scales. They will direct special attention to zooplankton, at both the individual population level (e.g., euphausiids), and at the aggregated community level and employ advanced data assimilation (e.g., of the mesoscale surveys) to produce optimal merged data/model products for use by the GLOBEC NEP synthesis effort. The coupled physical-ecosystem model products will include dynamically consistent, data-assimilative hindcasts for the region and time of the CCS field experiments and multi-decadal, basin-scale, nested calculations (1970-present). With this research, the investigators seek to (i) quantify how physical features in the California Current System and variability related to climate change impact zooplankton biomass, production, distribution, and the retention and loss of zooplankton from coastal regions and (ii) compare the impacts of climate variability and change (such as El Nino-La Nina cycles and regime shifts) on marine animal populations (euphausiids) in the CCS and CGOA. Both of these respond directly to stated goals of the GLOBEC NEP synthesis program. In addition, this project will afford the opportunity for multiple Ph.D. scientists and undergraduate students, working either directly with the PIs or by attendance at the proposed workshops, to participate in GLOBEC synthesis.