...
首页> 外文期刊>Oceanography >Synthesis of Pacific Ocean Climate and Ecosystem Dynamics
【24h】

Synthesis of Pacific Ocean Climate and Ecosystem Dynamics

机译:太平洋气候与生态系统动力学综合

获取原文
获取原文并翻译 | 示例
           

摘要

The goal of the Pacific Ocean Boundary Ecosystem and Climate Study (POBEX) was to diagnose the large-scale climate controls on regional transport dynamics and lower trophic marine ecosystem variability in Pacific Ocean boundary systems. An international team of collaborators shared observational and eddy-resolving modeling data sets collected in the Northeast Pacific, including the Gulf of Alaska (GOA) and the California Current System (CCS), the Humboldt or Peru-Chile Current System (PCCS), and the Kuroshio-Oyashio Extension (KOE) region. POBEX investigators found that a dominant fraction of decadal variability in basin- and regional-scale salinity, nutrients, chlorophyll, and zooplankton taxa is explained by a newly discovered pattern of ocean-climate variability dubbed the North Pacific Gyre Oscillation (NPGO) and the Pacific Decadal Oscillation (PDO). NPGO dynamics are driven by atmospheric variability in the North Pacific and capture the decadal expression of Central Pacific El Ninos in the extratropics, much as the PDO captures the low-frequency expression of eastern Pacific El Ninos. By combining hindcasts of eddy-resolving ocean models over the period 1950-2008 with model passive tracers and long-term observations (e.g., CalCOFI, Line-P, Newport Hydrographic Line, Odate Collection), POBEX showed that the PDO and the NPGO combine to control low-frequency upwelling and alongshore transport dynamics in the North Pacific sector, while the eastern Pacific El Nino dominates in the South Pacific. Although different climate modes have different regional expressions, changes in vertical transport (e.g., upwelling) were found to explain the dominant nutrient and phytoplankton variability in the CCS, GOA, and PCCS, while changes in alongshore transport forced much of the observed long-term change in zooplankton species composition in the KOE as well as in the northern and southern CCS. In contrast, cross-shelf transport dynamics were linked to mesoscale eddy activity, driven by regional-scale dynamics that are largely decoupled from variations associated with the large-scale climate modes. Preliminary findings suggest that mesoscale eddies play a key role in offshore transport of zooplankton and impact the life cycles of higher trophic levels (e.g., fish) in the CCS, PCCS, and GOA. Looking forward, POBEX results may guide the development of new modeling and observational strategies to establish mechanistic links among climate forcing, mesoscale circulation, and marine population dynamics.
机译:太平洋边界生态系统和气候研究(POBEX)的目标是诊断对太平洋边界系统中区域运输动力学和较低营养性海洋生态系统变异性的大规模气候控制。一个国际合作者团队共享了在东北太平洋收集的观测和涡旋模型数据集,其中包括阿拉斯加湾(GOA)和加利福尼亚洋流系统(CCS),洪堡或秘鲁-智利洋流系统(PCCS),以及黑潮-Oyashio扩展(KOE)地区。 POBEX研究人员发现,流域和区域范围内盐度,养分,叶绿素和浮游生物类群年代际变异的主要部分是由新发现的被称为北太平洋涡旋振荡(NPGO)和太平洋的海洋气候变异模式解释的。十年振荡(PDO)。 NPGO动力学是由北太平洋的大气变化驱动的,并捕获了温带热带中太平洋厄尔尼诺现象的年代际表达,就像PDO捕获了东太平洋厄尔尼诺现象的低频表达一样。通过将1950-2008年间解决涡旋的海洋模型的后兆与模型被动示踪剂和长期观测值(例如CalCOFI,Line-P,Newport Hydrographic Line,Odate Collection)相结合,POBEX表明PDO和NPGO相结合在北太平洋地区控制低频上升和近岸运输动态,而东太平洋厄尔尼诺现象在南太平洋占主导地位。尽管不同的气候模式具有不同的区域表达方式,但垂直运输的变化(例如上升流)被发现解释了CCS,GOA和PCCS中主要的养分和浮游植物变异,而沿岸运输的变化迫使大部分长期观测KOE以及CCS北部和南部浮游动物物种组成的变化。相反,跨架运输动力学与中尺度涡旋活动有关,这是由区域尺度动力学驱动的,而区域尺度动力学很大程度上与与大规模气候模式相关的变化脱钩。初步发现表明,中尺度涡旋在浮游动物的近海运输中起着关键作用,并影响着CCS,PCCS和GOA中较高营养水平(例如鱼类)的生命周期。展望未来,POBEX的结果可能会指导新的建模和观测策略的发展,从而建立气候强迫,中尺度环流和海洋人口动态之间的机械联系。

著录项

  • 来源
    《Oceanography》 |2013年第4期|68-81|共14页
  • 作者单位

    School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA;

    College of Earth, Ocean, and Atmospheric Sciences,Oregon State University, Corvallis, OR, USA;

    School of Oceanography, University of Washington, Seattle, WA, USA;

    College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis,OR, USA;

    School of Marine Sciences, University of Maine, Orono, ME, USA;

    Scripps Institution of Oceanography,University of California, San Diego (UCSD), La Jolla, CA, USA;

    Scripps Institution of Oceanography, UCSD, La Jolla, CA, USA;

    Atmospheric and Environmental Research Inc., Lexington, MA, USA;

    School of Earth and Atmospheric Sciences,Georgia Institute of Technology, Atlanta, GA, USA;

    National Oceanic and Atmospheric Administration (NOAA), Southwest Fisheries Science Center, Pacific Grove, CA, USA;

    NOAA, Northwest Fisheries Science Center, Seattle, WA, USA;

    NOAA, Silver Spring, MD, USA;

    Marine Ecosystem Research Team, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Kanagawa,Japan;

    Earth Simulator Center, JAMSTEC,Kanagawa, Japan;

    Escuela de Ciencias del Mar, Pontificia Universidad Catolica de Valparaiso, Valparaiso, Chile;

    Departmento de Oceanografica, Universidad de Concepcion, Concepcion, Chile;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号