Climatic Response and Environmental Impact of Anthropogenic Forcing on the Multi-component Tropical Atmosphere/Ocean/Vegetation System

参与者将使用一个完全耦合的大气-海洋-陆地表面生物圈模型来调查热带气候系统对二氧化碳浓度增加的反应。他们将研究热带地区大气、海洋和陆地表面生物物理过程之间的反馈，并确定多成分相互作用如何影响气候趋势指纹的结构。他们还将研究全球变暖如何影响气候变化，如厄尔尼诺/南方涛动（ENSO）和热带大西洋涛动（TAO）。他们将评估热带气候变化和气候变异对热带大陆的影响。在太平洋地区，重点是海洋-大气的相互作用，而在大西洋地区，重点是陆地-海洋-大气的相互作用。在保持标准NCAR CSM的主要气候特征的同时，CSM-T31比T42版本的计算效率高得多。LPJ是一个有效的动态植被模式，可用于模拟气候-生物圈相互作用。这一计算效率高的大气-海洋-陆地生物圈模式将用于研究气候平均状态和气候变率在年际至年代际时间尺度上的变化，以及这些变化对陆地生态系统的影响。这项工作很重要，因为它将增进对年际到年代际尺度上的陆地-大气-海洋耦合气候系统的了解。

The PIs will use a fully coupled atmosphere-ocean-land surface biosphere model to investigate the response of the tropical climate system to an increased concentration of CO2. They will study feedbacks among the atmosphere, ocean and land surface biophysical processes in the tropics and determine how the multi-component interaction affects the structure of the climate trend fingerprint. They will also investigate how global warming affects climate variability, such as El Nino/Southern Oscillation (ENSO) and Tropical Atlantic Oscillation (TAO). They will assess the impact of the change of tropical climate and climate variability on the tropical continents. In the Pacific region, the focus is on ocean-atmosphere interactions, while in the Atlantic region, the focus is on land-ocean-atmosphere interactions.The PIs will couple the NCAR CSM (T31 version) with the Lund-Potsdam-Jena (LPJ) land surface biosphere model. While maintaining the major climatic features of the standard NCAR CSM, the CSM-T31 is much more computationally efficient than the T42 version. The LPJ is an efficient dynamic vegetation model that can be used to simulate climate-biosphere interactions. This computationally efficient atmosphere-ocean-land biosphere model will be used to study the changes of both the climate mean state and climate variability at interannual to interdecadal time scales, as well as the impact of these changes on terrestrial ecosystems. The work is important because it will enhance understanding of the coupled land-atmosphere-ocean climate system on interannual to interdecadal scales.