The Hawaii Ocean Time-series (HOT): Sustaining ocean ecosystem and climate observations in the North Pacific Subtropical Gyre

夏威夷海洋时间序列（HOT）：北太平洋副热带环流的维持海洋生态系统和气候观测

• 批准号: 1260164
• 负责人: David Karl
• 金额: $ 571.87万
• 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: 2013
• 资助国家: 美国
• 起止时间: 2013-08-01 至 2019-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1260164&HistoricalAwards=false
• 关键词: Hawaii; Ocean; Time; series; HOT

Intellectual Merit: This proposal will extend funding for the Hawaii Ocean Time-series(HOT) research program for an additional 5 year period (August 2013-July 2018). This will extend the program into its 30th year of sustained observations of ocean ecosystem and climate variability at Station ALOHA in the North Pacific Subtropical Gyre (NPSG). The underlying objectives of HOT continue to focus on documenting temporal dynamics in the cycling of carbon and associated bioelements, in addition to identifying variability associated with hydrological and ecological properties, heat fluxes, and circulation of the NPSG. The program relies on monthly shipboard and near-continuous moored platform measurements to document variability in ocean properties and processes over time scales ranging from semi-diurnal to decadal. Foremost among HOT accomplishments are improved quantification of reservoirs and fluxes of carbon and associated bioelements, identification of how changes to the North Pacific hydrological cycle influence ocean physics and biogeochemistry, increased understanding of the sensitivity of bioelemental cycling to large scale ocean-climate interactions, and creation of long-term data sets needed for assessing future changes to the NPSG. This award provides funds to maintain the high quality suite of biogeochemical and physical measurements required for continued assessment of dynamics in ocean carbon and nutrient pools and fluxes, physical climate, plankton community structure, ecosystem productivity, and inherent optical properties. Increasing the length of program observations continues to improve the value of the dataset for deciphering how low-frequency natural and anthropogenic climate signals influence ecosystem structure in the NPSG. Such efforts will continue to aid on-going biogeochemical and numerical ocean circulation models required for predicting how future habitat perturbations may influence ecosystem dynamics in the NPSG.Broader Impacts: Education, outreach, and training will continue to play a prominent role in HOT program activities. HOT provides a unique learning platform for high school, undergraduate, graduate and postdoctoral students and teachers from Hawaii and around the world. The monthly HOT cruises provide short-duration (4 day) opportunities for students and teachers to gain first-hand exposure to ocean and climate sciences. In addition, HOT helps support the research of numerous ocean scientists who rely on the program's infrastructure (ship time, staff, laboratories, and equipment) to conduct their research, education and outreach activities. For example, the Center for Microbial Oceanography: Research and Education (C-MORE) uses the monthly HOT cruises for their "Teachers-at Sea" program that provides opportunities for local area middle school and high school teachers to participate in oceanographic field research. Moreover, HOT PIs maintain a strong commitment to mentoring and training of secondary, undergraduate, graduate, and postdoctoral students, and the current proposal requests support for both graduate and undergraduate students. HOT program data remain readily accessible and freely available. For example, HOT CO2 data are being included in the forthcoming 5th Assessment Report of the Intergovernmental Panel on Climate Change, increasing the visibility of program data and public awareness of ocean-climate change. Moreover, program data are widely used in the classroom and appear in textbooks on ocean science.

知识分子的优点：该提案将向夏威夷海洋时间序列（HOT）研究计划提供额外的5年（2013年8月至2018年7月）的资金。这将把该计划扩展到其对北太平洋亚热带Gyre（NPSG）持续观察到海洋生态系统和气候变化的30年。 HOT的基本目标继续专注于记录碳和相关生物元素循环中的时间动态，此外还确定了与水文和生态特性，热通量和NPSG循环相关的可变性。该计划依靠每月的船上和近乎连续的系泊平台测量值来记录海洋物业和过程中随时间尺度的变异性，范围从半融合到十年。 Foremost among HOT accomplishments are improved quantification of reservoirs and fluxes of carbon and associated bioelements, identification of how changes to the North Pacific hydrological cycle influence ocean physics and biogeochemistry, increased understanding of the sensitivity of bioelemental cycling to large scale ocean-climate interactions, and creation of long-term data sets needed for assessing future changes to the NPSG.该奖项提供了资金，以维持继续评估海洋碳和养分池和通量动态所需的生物地球化学和物理测量的高质量套件，物理气候，浮游生物社区结构，生态系统生产率以及固有的光学特性。增加程序观测的长度继续提高数据集的价值，以破译低频自然和人为气候信号影响NPSG中的生态系统结构。这样的努力将继续帮助正在进行的生物地球化学和数值海洋循环模型，以预测未来的栖息地扰动如何影响NPSG的生态系统动态。Broader的影响：教育，外展和培训将继续在热门计划活动中发挥着重要作用。 HOT为来自夏威夷及世界各地的高中，本科生，研究生和博士后学生以及老师提供了一个独特的学习平台。每月的热水巡游为学生和老师提供了短期（4天）的机会，可以亲身接触海洋和气候科学。此外，HOT有助于支持众多依靠该计划的基础设施（船舶时间，员工，实验室和设备）的海洋科学家的研究，以进行研究，教育和外展活动。例如，微生物海洋学中心：研究与教育（C-MORE）使用每月的热巡航为他们的“老师 - 海上”计划，为当地中学和高中教师提供了参加海洋学现场研究的机会。此外，HOT PIS对二级，本科，研究生和博士后学生的指导和培训保持着坚定的承诺，以及当前的建议要求研究生和本科生的支持。热门程序数据仍然可以易于访问且可免费获得。例如，即将到来的关于气候变化间政府间小组的第五次评估报告中，热二氧化碳数据增加了，从而提高了计划数据的可见性和公众对海洋气候变化的认识。此外，程序数据被广泛用于课堂，并出现在有关海洋科学的教科书中。

项目成果

Transcriptional patterns identify resource controls on the diazotroph Trichodesmium in the Atlantic and Pacific oceans

• DOI: 10.1038/s41396-018-0087-z
• 发表时间: 2018-02
• 期刊: The ISME Journal
• 作者: Mónica Rouco;K. Frischkorn;S. T. Haley;Harriet Alexander;S. Dyhrman

Differential Responses of Eukaryotic Phytoplankton to Nitrogenous Nutrients in the North Pacific Subtropical Gyre

• DOI: 10.3389/fmars.2018.00092
• 发表时间: 2018-03
• 期刊: Frontiers in Marine Science
• 影响因子: 3.7
• 作者: Y. Rii;R. Bidigare;M. Church

Nitrogen fixation rates diagnosed from diurnal changes in elemental stoichiometry

• DOI: 10.1002/lno.10815
• 发表时间: 2018-09-01
• 期刊: LIMNOLOGY AND OCEANOGRAPHY
• 影响因子: 4.5
• 作者: Follett, Christopher L.;White, Angelicque E.;Follows, Michael J.
• 通讯作者: Follows, Michael J.

Station ALOHA: A Gathering Place for Discovery, Education, and Scientific Collaboration: Station ALOHA: A Gathering Place for Discovery, Education, and Scientific Collaboration †

ALOHA 站：发现、教育和科学合作的聚集地： ALOHA 站：发现、教育和科学合作的聚集地 —

• DOI: 10.1002/lob.10285
• 发表时间: 2019
• 期刊: Limnology and Oceanography Bulletin
• 作者: Karl, David M.;Church, Matthew J.
• 通讯作者: Church, Matthew J.

Temporal Variability of Trichodesmium spp. and Diatom-Diazotroph Assemblages in the North Pacific Subtropical Gyre

Trichodesmium spp 的时间变异性。

• DOI: 10.3389/fmars.2018.00027
• 发表时间: 2018
• 期刊: Frontiers in Marine Science
• 影响因子: 3.7
• 作者: White, Angelicque E.;Watkins-Brandt, Katie S.;Church, Matthew J.
• 通讯作者: Church, Matthew J.