Collaborative Research: P2C2--Last Interglacial Earth System: Testing Transient Climate and Ice-sheet Simulations with a Proxy-data Network

该项目的目标是利用海洋-大气-冰盖耦合模型（群落地球系统模型）对末次间冰期（LIG）进行高分辨率同步耦合瞬态模拟，以提供一致的物理框架来研究末次间冰期海平面上升和潜在的~2摄氏度大气变暖背后的机制。通过对LIG的瞬态和敏感性模拟，研究小组旨在系统地研究气候和格陵兰冰盖对地球轨道结构、温室气体浓度、与大西洋经向翻转环流（AMOC）相关的经向海洋热输送以及植被反馈变化的响应。通过将这些模拟与已发表研究的代理数据和捕获时空温度变化的新数据汇编进行比较，研究人员计划解决以下关于LIG的基本问题：1)LIG期间与工业化前时期相比，什么气候反馈导致了高达~2摄氏度的重建变暖；2)格陵兰冰盖（GrIS）对全球海平面上升的贡献有多大？3)海洋-大气-冰盖耦合模式对末次冰期等重大气候转变期间气候突变的模拟效果如何？该项目支持早期职业科学家开发高分辨率气候模型输出，为更广泛的科学界服务，并让更广泛的民间社会参与以科学为基础的教育推广

This project's goal is to conduct high-resolution synchronously coupled transient simulations of the last interglacial period (LIG) using a coupled ocean-atmosphere-ice sheet model (Community Earth System Model) in order to provide a consistent physical framework to investigate the mechanisms behind the higher sea level and the potential ~2 degrees Celsius atmospheric warming during the LIG. With both transient and sensitivity simulations of the LIG, the research team aims to systematically investigate the response of climate and the Greenland ice sheet to variations in Earth's orbital configuration, greenhouse gas concentrations, meridional ocean heat transport associated with the Atlantic Meridional Overturning Circulation (AMOC), and vegetation feedbacks. By comparing these simulations of the LIG with proxy data from published studies and a new data compilation that captures temporal and spatial temperature variability, the researchers plan to address the following fundamental questions about the LIG: 1) What climate feedbacks are responsible for the up to ~2 degree Celsius reconstructed warming during the LIG with respect to the pre-industrial period; 2) How much did the Greenland Ice Sheet (GrIS) contribute to global sea level rise above present day during the LIG; and 3) How well can the coupled ocean atmosphere-ice sheet model simulate abrupt climate change during major climate transitions, such as the last glacial inception.This project supports an early career scientist, developing high-resolution climate model output that could serve the wider science community, and engagement of the broader civil society in science-based education outreach