International Postdoctoral Fellows Program: Rapid Atmospheric CO2 Variations and Ocean Circulation

9509247 Figge国际青年研究员和博士后研究员计划使美国科学家和工程师能够在国外进行三到二十四个月的研究。该计划的奖励为联合研究提供了机会，并利用独特或互补的设施、专业知识和国外的实验条件。该奖项将支持Regina a . Figge博士与Thomas F. Stocker博士在瑞士伯尔尼大学进行为期12个月的博士后研究访问。本研究的目的是利用伯尔尼二维海洋-大气耦合模式提高对地球碳循环动力学的理解。重要的是要了解控制碳循环的过程，以便能够评估与过去和持续排放的二氧化碳（CO2）有关的未来气候变化，二氧化碳是主要的“温室”气体之一。伯尔尼模式在研究海洋碳循环方面的优势在于其计算效率和解决海洋热盐环流全球特征的能力，这可能是地球自然大气二氧化碳浓度背后的关键驱动机制，特别是在短时间尺度上。费格博士将通过在海洋现有的无机成分中加入有机碳循环来帮助修改伯尔尼模型。她将使用这个版本的模型来研究地质记录中观察到的地球自然碳循环的重要特征和过程。她将测量从瑞士泥炭沼泽收集的泥炭核上的稳定碳同位素，以验证一种重建大气二氧化碳浓度的新方法。＊＊＊

9509247 Figge The International Junior Investigator and Postdoctoral Fellows Program enables U.S. scientists and engineers to conduct three to twenty-four months of research abroad. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad. This award will support a twelve-month postdoctoral research visit by Dr. Regina A. Figge to work with Dr. Thomas F. Stocker at the University of Bern in Switzerland. The objective of this research is to improve understanding of the Earth's carbon cycle dynamics using the Bern 2D coupled ocean-atmosphere model. It is important to understand the processes that control the cycling of carbon to be able to assess future climate change associated with past and continuing emissions of carbon dioxide (CO2), which is one of the major "greenhouse" gases. The Bern model's strength in studying the cycling of carbon by the ocean is its computational efficiency combined with its ability to resolve the global features of the ocean thermohaline circulation which may be a critical driving mechanism behind the Earth's natural atmospheric CO2 concentration, especially on brief time scales. Dr. Figge will help to modify the Bern model by adding an organic carbon cycle to the ocean's existing inorganic component. She will use this version of the model to investigate the important features and processes involved in the Earth's natural carbon cycle as observed in the geological record. And she will measure stable carbon isotopes on a peat core to be collected from a Swiss peat bog to verify a new method for reconstructing atmospheric CO2 concentration. ***