CMIP6二氧化碳移除模式比较计划(CDRMIP)概况与评述

Short commentary on CMIP6 Carbon Dioxide Removal Model Intercomparison Project(CDRMIP)

地球工程是指通过人工方法在大规模尺度上干预气候系统,使地球气候降温的一种手段。CO2移除是地球工程的主要途径之一。文中概述了CO2移除地球工程的科学背景、各种CO2移除方法的利弊、大尺度应用CO2移除方法可能产生的气候效应和风险,以及CO2移除方案在未来气候情景研究中的现状。在第六次国际耦合模式比较计划(CMIP6)框架下开展的CO2移除模式比较计划(CDRMIP),为深入研究CO2移除地球工程减缓气候变化的效能和气候系统对其的响应提供了统一试验方案和平台。CDRMIP的开展,对地球工程和气候变化研究具有重要的促进作用。

Geoengineering is a large-scale deliberate intervention of offsetting the global temperature rise from greenhouse gases.Carbon Dioxide Removal(CDR)is an important form of geoengineering.In this brief review,we introduce the principle science backgrounds behind CDR,the potential efficacy,feedbacks,and side effects of specific CDR methods,as well as the status of CDR in the Integrated Assessment Model(IAM)scenario studies.Recently the Carbon Dioxide Removal Model Intercomparison Project(CDRMIP)was initiated as part of the CMIP6.As a common framework to assess the potential effects and risks of using CDR to address climate change,CDRMIP provides an important opportunity to better understand how the Earth system responds to human climate perturbations.