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

合作研究：P2C2——最后一个间冰期地球系统：使用代理数据网络测试瞬态气候和冰盖模拟

• 批准号: 1502990
• 负责人: Feng He
• 金额: $ 10万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-07-15 至 2019-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1502990&HistoricalAwards=false
• 关键词: Collaborative; Research; P2C2; Last; Interglacial

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

该项目的目标是使用海洋-大气-冰盖耦合模式(共同体地球系统模式)对最后一次间冰期(LIG)进行高分辨率同步耦合瞬变模拟，以便提供一个一致的物理框架来研究LIG期间较高的海平面和潜在的~2摄氏度大气变暖背后的机制。通过对LIG的瞬变和敏感性模拟，研究小组旨在系统地研究气候和格陵兰冰盖对地球轨道配置、温室气体浓度、与大西洋子午线翻转环流(AMOC)相关的经向海洋热传输以及植被反馈的响应。通过将LIG的这些模拟与已发表研究的代理数据和捕捉时间和空间温度变率的新数据汇编进行比较，研究人员计划解决LIG的以下基本问题：1)LIG期间相对于前工业化时期高达~2摄氏度的重建变暖的气候反馈是什么；2)在LIG期间，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-冰盖耦合模式能在多大程度上模拟重大气候转变期间的突然气候变化，例如最后一次冰川开始。该项目支持一名早期职业科学家，开发能够服务于更广泛科学界的高分辨率气候模型输出，以及更广泛的民间社会参与以科学为基础的教育推广