CAREER:Continental Paleoenvironmental Responses to Carbon Cycle Perturbations During the mid-Cretaceous Greenhouse

职业：白垩纪中期温室期间大陆古环境对碳循环扰动的响应

• 批准号: 1555216
• 负责人: Marina Suarez
• 金额: $ 37.57万
• 依托单位: University of Texas at San Antonio
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-02-15 至 2019-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1555216&HistoricalAwards=false
• 关键词: CAREER; Continental; Paleoenvironmental; Responses; Carbon

While widely known for the diverse dinosaur faunas of the time, the Cretaceous Period is important for more than just the creatures that populate the imagination, museums, and popular culture. Cretaceous climate changes may be the result of numerous disruptions to the carbon cycle, likely due to volcanism. The carbon cycle controls climate change. Past carbon cycle changes resulted in major climate shifts, environmental change, and extinction. By understanding ancient terrestrial carbon cycle perturbations, we can understand the consequences to ongoing disruptions to the carbon cycle. This project will determine if the Cretaceous carbon cycle disruptions resulted in temperature and precipitation changes on land. To achieve these scientific goals, funds will go toward supporting community college, undergraduate, graduate and post-doctoral students as well as creating educational lab activities. As a Career award, the PI will develop collaborations with other universities, enhance her education activities and integrate these with a strong research program for professional development that will provide a solid base for future research.This project spans the late Aptian to early Albian (approximately 115 to 110 million year ago), and specifically targets carbon isotope excursions associated with ocean anoxic event 1b from 4 localities (Utah, Texas, Spain, and China). The project will generate multiple climate proxies such as: 1) clumped isotope paleothermometry; 2) major element geochemistry to quantify weathering intensity and paleoprecipitation; and 3) carbon isotope data to estimate pCO2. This data will be synthesized to help identify the full range of climate change triggers, feedbacks, and responses during Cretaceous carbon cycle perturbations in continental environments.

虽然以当时多样化的恐龙动物群而闻名，但白垩纪的重要性不仅仅在于充满想象力，博物馆和流行文化的生物。白垩纪的气候变化可能是碳循环多次中断的结果，可能是由于火山活动。碳循环控制着气候变化。过去的碳循环变化导致了重大的气候变化、环境变化和物种灭绝。通过了解古代陆地碳循环扰动，我们可以了解碳循环持续中断的后果。该项目将确定白垩纪碳循环中断是否导致陆地上的温度和降水变化。为了实现这些科学目标，资金将用于支持社区学院，本科生，研究生和博士后学生以及创建教育实验室活动。作为一个职业奖，PI将发展与其他大学的合作，加强她的教育活动，并将这些与一个强大的专业发展研究计划相结合，这将为未来的研究提供坚实的基础。（大约1.15亿至1.1亿年前），并专门针对来自4个地点的与海洋缺氧事件1b相关的碳同位素漂移（犹他州、德克萨斯州、西班牙和中国）。该项目将产生多个气候代用指标，如：1）聚集同位素古温度测定法; 2）主要元素地球化学，以量化风化强度和古降水量; 3）碳同位素数据，以估计pCO 2。这些数据将被合成，以帮助确定在大陆环境中白垩纪碳循环扰动期间气候变化的触发因素，反馈和响应的全方位。