Collaborative Research: Hawaii Ocean Time-series Program: Biogeochemistry and Ecology Component

合作研究：夏威夷海洋时间序列项目：生物地球化学和生态学组成部分

• 批准号: 0326616
• 负责人: David Karl
• 金额: $ 432.46万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-15 至 2010-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0326616&HistoricalAwards=false
• 关键词: Collaborative; Research; Hawaii; Ocean; Time

Since Oct 1988, a comprehensive suite of environmental measurements have been obtained at the oligotrophic Sta. ALOHA (22'45N, 158'00'W) in the North Pacific Subtropical Gyre. This time-series activity - Hawai'i Ocean Time-Series (HOT) - was initiated within the 15-year U.S. Joint Global Ocean Flux Program; the results of the HOT program have been one of the stellar centerpieces of the U.S. JGOFS accomplishments. The core HOT measurements were selected to provide data to validate existing carbon-nitrogen-phosphorus biogeochemical models and, to improve them. Foremost in importance among the various ecosystem processes under investigation are: the flux of carbon at the air?sea interface, the rates and control mechanisms of primary production and particle export, and the pathways and intensities of nutrient (N and P) fluxes. Also important are the observed time?dependent changes in microbial biomass and biodiversity, and the relationships of these observed ecosystem changes to the broader extra-tropical climate forcing from the El Nino?Southern Oscillation (ENSO) and other large scale ocean?atmosphere interactions. The emergent data from the HOT core measurement program are unique and robust and illuminate previously undocumented phenomena. The scientific results of the ongoing ocean time?series program have provided an unprecedented view of biogeochemical cycles and ecological processes in an under-sampled region of the world ocean. A very large number of HOT?related publications and reports have already appeared based on the research results obtained by program?associated and independent, ancillary investigators.This award will support the important continuation of this ocean time?series core measurement program for an additional five?year period ? August 2003 to July 2008. During this period, Dr. Karl and collaborators will move the measurement program from a primarily ship?based effort with an approximately monthly frequency of observations, to a comprehensive ship / mooring / autonomous vehicle /cabled observatory / satellite based measurement program that covers a broader spectrum of temporal and spatial scales. In addition to maintaining a suite of core measurements and distributing the analytical results to the scientific community at large in a timely and accessible manner, they will also continue providing the logistical infrastructure and the shared shiptime required to support related research programs funded independently by NSF, ONR, NOAA, DOE and other agencies.As in the past, the HOT program investigators will be actively engaged in education at all levels from K?12 through post?doctoral. Research conducted as part of the HOT program has contributed significantly to formal classroom instruction in oceanography as well as at?sea training. In this next phase of HOT, investigators will initiate two new education and outreach activities, Scientist?Educator Associations (SEA) and Bluewater Marine Laboratory (BML), both targeted at middle school to high school students in Hawaii and the Pacific Island region, including several under?represented ethnic groups. The HOT program infrastructure, both at?sea and laboratory components, provides unique facilities for science training. The Internet?accessible time?series data base has already proven to be an invaluable education tool for students and teachers worldwide. The broader societal benefits of the research are an increased understanding of the Earth's carbon and nutrient cycles, and a greater knowledge of climate and ecosystem variability, including anthropogenic impacts. By maintaining these long?term ocean sentinels we can help to track the health of the ocean and help to develop the basic scientific understanding that will be necessary for predicting future ocean ecosystem states.

自1988年10月以来，在贫营养性STA上获得了全面的环境测量。 Aloha（22'45n，158'00'w）在北太平洋亚热带Gyre。这段时间序列活动 - 夏威夷海洋时间系列（HOT） - 在美国15年的美国联合全球海洋助产计划中启动；热门计划的结果一直是美国JGOF成就的出色核心之一。 选择了核心热测量以提供数据以验证现有的碳氮磷生物地球化学模型并改善它们。在调查的各种生态系统过程中，重要性最重要的是：空气中碳的通量？海洋界面，主要生产和颗粒出口的速率和控制机制，以及养分（N和P）通量的途径和强度。同样重要的是，观察到的时间也很重要？微生物生物量和生物多样性的依赖性变化，以及这些观察到的生态系统的关系变化了El Nino的较广泛的热带气候变化。来自热核测量计划的新兴数据是独特而鲁棒的，并阐明了以前无证现象。正在进行的海洋时间？系列计划的科学结果为世界海洋采样不足的地区中生物地球化学周期和生态过程提供了前所未有的观点。根据计划获得的研究结果，已经出现了大量的热？相关的出版物和报告。与之相关的独立，辅助调查人员。此奖项将支持此海洋时间的重要延续？系列核心测量计划，以增加五个年期？ 2003年8月至2008年7月。在此期间，Karl博士及其合作者将把测量计划从主要的船只转移到以大约每月的观察频率为基础的努力，转移到全面的船 /系泊 /系泊 /自动驾驶 /自动驾驶汽车 /电缆天文台 /卫星涵盖更广泛的时间和空间尺度的测量程序。除了维持一系列核心测量以及将分析结果分配给科学界的整个科学界，他们还将继续提供后勤基础架构以及支持由NSF独立资助的相关研究计划所需的共同示威者， ONR，NOAA，DOE和其他机构。过去，热门计划调查人员将积极从事从K？12到博士学位的各个级别的教育。作为热门计划的一部分进行的研究对海洋学以及海上训练的正式课堂教学做出了重大贡献。在下一阶段的热门阶段，调查人员将发起两项新的教育和外展活动，科学家教育协会（SEA）和Bluewater Marine Laboratory（BML），均针对中学，旨在夏威夷和太平洋岛屿地区的高中学生，包括几个代表族裔群体。海上和实验室组件的热门计划基础设施为科学培训提供了独特的设施。互联网？可访问的时间？系列数据库已经被证明是全球学生和教师的宝贵教育工具。研究的更广泛的社会益处是对地球碳和养分周期的了解，以及对气候和生态系统变异性的更多了解，包括人为影响。通过维护这些漫长的术语海洋哨兵，我们可以帮助跟踪海洋的健康，并有助于发展基本的科学理解，这对于预测未来的海洋生态系统国家是必不可少的。