A better understanding of recent changes of the CO2 system in the Western Arctic Ocean via field measurements from the summer 2014 CHINARE cruise

该项目将继续美国和中国科学家之间的成功合作，研究大气和北冰洋表面沃茨之间的二氧化碳交换。它涉及收集高分辨率的航行中pCO 2（二氧化碳分压）数据，结合水柱pH值，总溶解无机碳（DIC），碱度，钙，营养物质和氧气的离散样本，在2014年夏季中国北极研究考察（北极考察）巡航期间。与历史数据一起，结果将用于限制海面pCO 2的变化，空气到海洋的CO2通量，以及它们随时间的变化，并了解北冰洋西部的潜在碳循环控制机制。研究人员假设：1）北冰洋西部海面pCO 2变化很大，受气候敏感的多个参数控制，目前的知识不足以得出关于海气CO2通量、控制机制和未来变化预测的可靠结论，（2）生物产量高（和CO2/DIC去除）区域随着海冰的消退从20世纪90年代和21世纪初的南部地区扩展到沿着今天的北方盆地，河流无机碳和有机碳输入增加，对北冰洋西部海面pCO 2和海-气CO2净交换通量起着重要的控制作用。该项目将继续积极开展国际合作，并通过实地考察和数据综合活动培养中国北极碳研究团队。这项合作将把这些数据纳入几个美国和国际数据库。该项目还将直接支持博士学位。学生.

This project would continue a successful collaboration between U.S. and Chinese scientists to study the exchange of carbon dioxide between the atmosphere and the surface waters of the Arctic Ocean. It involves the collection of high resolution underway pCO2 (partial pressure of carbon dioxide) data combined with discrete samples of water column pH, total dissolved inorganic carbon (DIC), alkalinity, calcium, nutrients, and oxygen during the Chinese Arctic Research Expedition (CHINARE) cruise in summer 2014. Together with historical data, the results will be used to constrain the variability of sea surface pCO2, air-to-sea CO2 flux, and their changes over time and to understand the underlying carbon cycling control mechanisms in the Western Arctic Ocean. The investigator hypothesizes that 1) sea surface pCO2 is highly variable in the Western Arctic Ocean and is controlled by multiple parameters that are climate-sensitive, and that current knowledge is insufficient to draw reliable conclusions regarding air-sea CO2 flux, controlling mechanisms and prediction of future changes, 2) high biological production (and CO2/DIC removal) areas have expanded from the southern areas in 1990s and early 2000s to the northern basins today along with the retreat of sea ice, and 3) riverine inorganic and organic carbon inputs have increased and they play an important role in controlling sea surface pCO2 and thus the net air-sea CO2 exchange flux in the western Arctic Ocean. This project would continue an active international collaboration and culture a Chinese Arctic carbon research team through fieldwork and data synthesis activities. The collaboration would incorporate these data into several U.S. and international databases. The project would also directly support a Ph.D. student.