U.S.-Mexico Program: Holocene Ocean-Climate Variations, Gulf of California, Mexico

这份美国-墨西哥奖将支持南加州大学的Robert Douglas博士和Donn Gorsline博士与墨西哥恩塞纳达下加利福尼亚州自治大学的Jorge Ledesma-Vazquez博士和墨西哥国立自治大学的Adolfo Molina-Cruz博士进行研究合作。研究人员打算在加利福尼亚湾进行全新世古海洋学和古气候学方面的研究。他们的合作旨在记录全新世期间墨西哥湾的海洋气候变化，并将有助于评估世界亚热带地区的气候变化。具体来说，研究人员希望了解在过去9000年里控制和控制墨西哥季风变化的因素。他们的目标是验证这样一种观点，即过去8000年（可能更早）加利福尼亚湾的主要变化是冬季季风加剧的结果，这种季风导致了生物生产力的增加，氧最小带（OMZ）的变化，以及海湾水蒸发产量的增加。为此目的，他们建议研究墨西哥湾西部和东部岩心的动物和植物的地球化学以及沉积物记录，以寻找表明水团变化和墨西哥湾南部海洋带位置变化的信号。该项目将包括来自两国的研究生参与研究。美国国家科学基金会国际科学与工程办公室和海洋科学部为这项合作提供了资金。？？？？？

0304933DouglasThis U.S.-Mexico award will support Dr. Robert Douglas and Dr. Donn Gorsline of the University of Southern California in a research collaboration with Dr. Jorge Ledesma-Vazquez of the Universidad Autonoma de Baja California in Ensenada, Mexico and Dr. Adolfo Molina-Cruz of the Universidad Nacional Autonoma de Mexico. The researchers intend to work on aspects of Holocene paleoceanography and paleoclimatology in the Gulf of California. Their collaboration seeks to document the ocean-climate variability in the Gulf during the Holocene and will contribute to assessing climate change in subtropical regions of the world. Specifically the researchers wish to understand the factors that have controlled and paced the variations in the Mexican monsoon over the past 9,000 years. They aim to test the idea that the major changes in the Gulf of California for the past 8,000 years (possibly earlier) are the result of an intensification of winter monsoon winds that produced an increase in biological productivity, shifts in the oxygen minimum zone (OMZ), and an increase in the evaporative production of the Gulf Water. For that purpose they propose to study the geochemistry of faunal and flora and sediment records from cores from the west and east side of the Gulf for signals indicative of water mass changes and of shifts in the position of the OMZ in the southern Gulf. The project will involve graduate students from both countries in the research. The Office of International Science and Engineering and the Division of Ocean Sciences of NSF are contributing funds for this collaboration.?????