Collaborative Research: Synthesis of Arctic System Carbon Cycle Research Through Model-Data Fusion Studies Using Atmospheric Inversion and Process-Based Approaches

摘要高纬度陆地和海洋系统向大气中大量释放二氧化碳和甲烷，有可能以一种可能加速全球变暖的方式影响气候系统。为了提高我们预测高纬度地区碳动态的能力，这个团队在以下一般性问题的指导下，全面分析了北极系统的碳循环：泛北极地区二氧化碳和甲烷通量的地理模式是什么，平衡是如何随时间变化的，是什么过程控制着泛北极地区二氧化碳和甲烷的源和汇，控制因素是如何随时间变化的？为了解决这些一般性问题，该小组将使用预测和反演相结合的方法整合北极系统二氧化碳和甲烷动态的数据，并提供一种综合方法来估计和理解系统陆地和海洋部分的二氧化碳和甲烷的交换。由于气候系统容易受到高纬度二氧化碳和甲烷大量释放的影响，这些气体对气候变化的反应具有全球影响。这项研究将在一套相互关联的数值模式研究的背景下，将不同的区域数据集和理解汇集在一起。它将研究并试图量化北极碳和甲烷循环的陆地、大气和海洋组成部分之间的通量和联系。

AbstractA large release of CO2 and CH4 from high latitude terrestrial and marine systems to theatmosphere has the potential to affect the climate system in a way that may accelerate global warming. To improve our ability to predict the dynamics of carbon in high latitudes, this team analyze comprehensively the carbon cycle of the arctic system, guided by the following general questions: What are the geographic patterns of fluxes of CO2 and CH4 over the Pan-Arctic region and how is the balance changing over time and What processes control the sources and sinks of CO2 and CH4 over the Pan-Arctic region and how do the controls change with time?To address these general questions, the group will integrate data on CO2 and CH4 dynamics of the Arctic System using a combination of prognostic and inverse approaches and provide an integrative approach to estimating and understanding the exchanges of CO2 and CH4 from terrestrial and marine components of the system.Because the climate system is vulnerable to significant releases of CO2 and CH4 from high latitudes, the responses of these gases to climate change have global consequences. This study will bring together diverse regional data sets and understanding in the context of a linked set of numerical model studies. It will examine, and attempt to quantify, the fluxes and links between the terrestrial, atmospheric and oceanic components of the Arctic carbon and methane cycles.