U.S.-GLOBEC: NEP Phase IIIb-CGOA: A Synthesis of Climate-Forced Variability on Mesoscale Structure in the CGOA With Direct Comparisons to the CCS

U.S.-GLOBEC：NEP Phase IIIb-CGOA：CGOA 中尺度结构气候强迫变率的综合，并与 CCS 直接比较

• 批准号: 0630471
• 负责人: P. Ted Strub
• 金额: $ 14万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-05-01 至 2010-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0630471&HistoricalAwards=false
• 关键词: U.S.; GLOBEC; NEP; Phase; IIIb

A variety of extreme climate events occurred during the period of US GLOBEC monitoring and process studies in the NEP (1997-2004). These provide an unprecedented opportunity to examine a range of climate variability experienced by the coastal Gulf of Alaska (CGOA). By relating these climate events to regional physical and biological observations, using multiple and diverse data sources (GLOBEC observations, historical data sets and reanalyses, satellites, models), we can determine how these events affect mesoscale ocean variability in the CGOA and its related target populations (the primary goal of the NEP program). We can then directly compare these responses to those evident in the California Current System (CCS). There are two overarching goals for this project. 1) Characterize the linkages between basin-scale variability indicative of climate events and local CGOA changes in mesoscale variability that impact ecosystem pattern, structure and productivity. 2) Compare the linkages between basin-scale and local structure in the coastal Gulf of Alaska (CGOA) with those evident in the CCS, contrasting differing ecosystem responses to the same climate signals. The emphasis is on synthesis of physical circulation, upper ocean structure, nutrients and lower (planktonic) trophic levels to develop metrics based on multiple data sets spanning a wide spectrum of space and time scales. A funded GLOBEC-NEP Phase IIIa proposal to the same PIs to carry out similar analyses in the California Current System provides significant leverage, both financially and intellectually. This team of investigators represents expertise in diverse aspects of climate mesoscale interactions and data analysis. They will use correlative methods to characterize mesoscale variability in the CGOA and the concurrent basin-scale conditions during Field Program years, and then extend these comparisons back in time where possible. They will build on these correlational linkages between basin-scale and mesoscale patterns, examining the mechanisms behind these linkages from three points of view: i) comparing interannual and decadal scales of climate variability, ii) identifying and comparing different shelf regions of climate response in the CGOA, and iii) examining changes in seasonal signals. They will then compare and contrast signals observed in the CCS to those in the CGOA. BROADER IMPACTS: This project will contribute to the legacy of the GLOBEC NEP program in the form of analyses (papers), data sets, and indices for monitoring, assessing, and managing marine resources in the CGOA. By integrating and analyzing multiple data sets, the investigators will provide robust indicators of the response of the CGOA shelf to climate change, a useful tool for resource assessment and management. Improvement of ecosystem management strategies for the Alaskan shelf directly affects a large socio-economic sector of the US west coast. Two graduate students are funded under our CCS and CGOA efforts. Some of the satellite and survey data sets will also be incorporated into curriculum material that is under development within the OSU SMILE program. These materials are used in twelve Oregon high school districts with large proportions of students from groups traditionally under-represented in university science and mathematics departments. They are available for use in schools elsewhere.

美国GLOBEC NEP监测和过程研究期间（1997-2004年）发生了多种极端气候事件。这些为研究阿拉斯加湾沿岸 (CGOA) 经历的一系列气候变化提供了前所未有的机会。通过将这些气候事件与区域物理和生物观测联系起来，使用多种不同的数据源（GLOBEC观测、历史数据集和再分析、卫星、模型），我们可以确定这些事件如何影响CGOA及其相关目标的中尺度海洋变化人口（NEP 计划的主要目标）。然后我们可以直接将这些响应与加州海流系统 (CCS) 中明显的响应进行比较。该项目有两个总体目标。 1) 描述指示气候事件的流域尺度变率与影响生态系统格局、结构和生产力的中尺度变率的局部CGOA变化之间的联系。 2) 将阿拉斯加湾沿岸 (CGOA) 的盆地规模和局部结构之间的联系与 CCS 中明显的联系进行比较，对比不同的生态系统对相同气候信号的响应。重点是物理循环、上层海洋结构、营养物和下层（浮游）营养水平的综合，以开发基于跨越广泛空间和时间尺度的多个数据集的指标。一项资助的 GLOBEC-NEP IIIa 期提案要求相同的 PI 在加州海流系统中进行类似的分析，这在财务和智力上都提供了巨大的影响力。该研究团队代表了气候中尺度相互作用和数据分析各个方面的专业知识。他们将使用相关方法来表征 CGOA 的中尺度变化以及实地计划期间同时发生的盆地尺度条件，然后在可能的情况下将这些比较扩展到过去。他们将建立在流域尺度和中尺度模式之间的相关联系的基础上，从三个角度研究这些联系背后的机制：i）比较气候变化的年际和年代际尺度，ii）识别和比较不同大陆架区域的气候响应。 CGOA，以及 iii) 检查季节性信号的变化。然后，他们会将 CCS 中观察到的信号与 CGOA 中观察到的信号进行比较和对比。更广泛的影响：该项目将以分析（论文）、数据集和用于监测、评估和管理 CGOA 海洋资源的指数的形式，为 GLOBEC NEP 计划的遗产做出贡献。通过整合和分析多个数据集，研究人员将提供 CGOA 陆架对气候变化响应的可靠指标，这是资源评估和管理的有用工具。阿拉斯加大陆架生态系统管理策略的改进直接影响美国西海岸的大型社会经济部门。两名研究生获得了我们的 CCS 和 CGOA 的资助。一些卫星和调查数据集也将纳入 OSU SMILE 计划正在开发的课程材料中。这些材料在俄勒冈州的 12 个高中学区使用，其中很大一部分学生来自传统上在大学科学和数学系中代表性不足的群体。它们可供其他地方的学校使用。