Stable Isotopes and Strontium in Western Pacific Sclerosponges: Calibration and Applications to Paleoceanography

西太平洋硬化海绵中的稳定同位素和锶：校准及其在古海洋学中的应用

基本信息

批准号：
0426022
负责人：
Andrea Grottoli
金额：
$ 19.52万
依托单位：
University of Pennsylvania
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2004
资助国家：
美国
起止时间：
2004-08-01 至 2006-02-28
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0426022&HistoricalAwards=false
关键词：
Stable Isotopes Strontium Western Pacific

项目摘要

ABSTRACTOCE-0426022Proxy records are extremely useful for reconstructing paleoceanographic/ paleoclimate conditions and hence understanding oceanographic and climate change, although these data must be well-calibrated. However, proxy tools to evaluate annual-to-centennial timescale variability of the stable isotopic composition of dissolved inorganic carbon and oxygen in seawater over the past several centuries in the Pacific or to evaluate these variables and seawater temperature across depth have not been fully developed. The western Pacific plays a large role in tropical and global climate and is therefore an ideal location to pursue this research. A scientist at the University of Pennsylvania will quantitatively calibrate the sclerosponge, Acanthocheatetes wellsi, skeletal d13C, d18O, and strontium/calcium (Sr/Ca) to evaluate calibrated proxy records on annual-to-interdecadal timescales. The calibrations will then be applied to two high-resolution 50-year stable isotope and Sr/Ca records and the interannual-to-interdecadal timescale variability in the longer records will be evaluated by comparing them to available instrumental, satellite, and model output data. The results will be a valuable tool for constraining existing carbon uptake models, initializing and testing ENSO models, and generally increasing our knowledge of the natural spatial and temporal variability in d13CDIC, d18Osw, and seawater temperature at the surface and across depth in the tropics.

Abstractoce-0426022-proxy记录对于重建古环境/古气候条件以及了解海洋学和气候变化极为有用，尽管这些数据必须经过良好的校准。然而，在过去几个世纪中，在海水中溶解的无机碳和氧气稳定的同位素组成的年度至百年的时间尺度变异性的代理工具尚未饱满。西太平洋在热带和全球气候中起着重要作用，因此是从事这项研究的理想场所。宾夕法尼亚大学的一位科学家将定量校准Sclerosponge，Acanthocheatetes Wellsi，Skeletal D13C，D18O和Strontium/Calium/CA）（SR/CA），以评估年度与交互时代的校准校准的校准校准记录。然后，校准将应用于两个高分辨率的50年稳定同位素和SR/CA记录，并且将通过将它们与可用的仪器，卫星和模型输出数据进行比较来评估较长记录中的年间到年间时间尺度的可变性。结果将是一种有价值的工具，用于限制现有的碳吸收模型，初始化和测试ENSO模型，并通常提高我们对D13CDIC，D18OSW和海水温度在热带地区的自然空间和时间变异性的了解。