U.S.-France Cooperative Research: Southern Ocean Paleoclimatology

这一为期两年的奖项支持美法在气候动力学和古气候学方面的合作研究，哥伦比亚大学拉蒙特-多尔蒂地质天文台的道格拉斯·马丁森和威廉·霍华德以及法国国家科学研究中心的劳伦·拉贝里参与了这项为期两年的研究。研究人员将研究南极深海岩心的第四纪气候动力学和地质年代学问题。他们的研究目标是综合和综合数据集，并增进对物理气候和地球化学变化的时间和空间模式的了解。美国和法国的研究人员在理解南大洋在第四纪气候变化和调节大气化学方面的作用方面取得了重大进展。法国和美国采集的深海岩心非常适合进行互补研究。这家法国集团在过去16万年的岩芯方面拥有丰富的经验，分辨率为1000年或更短。然而，美国研究人员分析和研究了过去40万到50万年的古气候记录，分辨率为3000-5000年。通过拟议的计划，调查人员将能够获得具有一系列年龄间隔和分辨率的新的法国岩心。他们的努力将把法国和美国的记录放在共同的时间尺度上，并提供古生态和地球化学记录的综合。

This two-year award supports U.S.-France cooperative research in climate dynamics and paleoclimatology and involves Douglas Martinson and William Howard of Columbia University's Lamont- Doherty Geological Observatory and Laurent Labeyrie of the Centre des Faibles Radioactivites, the French National Center for Scientific Research. The investigators will study problems of Quaternary climate dynamics and geochronology in Antarctic deep- sea cores. The objectives of their research are to integrate and synthesize data sets and to advance knowledge of the temporal and spatial patterns of physical climate and the geochemical changes. Researchers in the U.S. and France have made significant progress in understanding the role of the Southern Ocean in Quaternary climate change and in modulating atmospheric chemistry. Deep-sea cores in the French and U.S. collections are well suited for complementary studies. The French group has extensive experience with cores which cover the last 160,000 years at resolutions of 1000 years and less. Whereas, the U.S. researchers have analyzed and studied paleoclimate records which cover the past 400,000 to 500,000 years at resolutions of 3000-5000 years. Through the proposed program, the investigators will have access to new French cores with a range of age intervals and resolutions. Their efforts will place both the French and U.S. records on common time scales, and provide a synthesis of the paleoecological and geochemical records.