面向碳达峰目标的我国碳排放权交易机制研究

被引:0
作者
张琦峰
机构
[1] 浙江大学
关键词
碳排放强度; 碳排放达峰; 碳交易机制; 碳排放权; 行业覆盖范围; 碳减排成本;
D O I
10.27461/d.cnki.gzjdx.2021.002919
年度学位
2021
学位类型
博士
导师
摘要
为实现《巴黎协定》强调的全球温升控制目标,我国承诺“碳排放总量在2030年达到峰值并争取尽早达峰;单位国内生产总值二氧化碳排放(即碳排放强度)较2005年下降65%以上”,形成了我国碳排放强度下降和总量达峰的“双重”目标(以下简称“碳减排‘双重’目标”)。作为碳价政策的典型代表,碳交易机制通过区域碳排放权总量的设定、分配与交易,严格控制区域碳排放水平、有效降低区域碳减排成本,因此已成为我国当前主要的碳减排政策。然而,近年来我国碳交易价格持续走低、碳减排成效差强人意、碳交易市场的建设进程稍显缓慢,碳交易机制的设计与运行正面临严峻挑战。其中,区域碳排放权总量设定、碳交易机制行业覆盖范围确定、初始碳排放权分配等问题悬而未决,成为影响我国碳交易市场建设进程和碳减排成效的重要原因。如何通过碳交易机制设计落实我国碳减排“双重”目标、降低碳减排成本成为我国气候治理领域亟待解决的问题。为此,本文以我国碳减排“双重”目标为背景,在碳排放权理论辨析、碳交易机制流程梳理的基础上,综合利用情景分析方法、非线性规划模型等,耦合碳排放强度下降、总量达峰“双重”目标下我国碳排放权总量的核算逻辑,提出减排成本视域下碳交易机制行业覆盖范围的确定思路,制定“自下而上”和“自上而下”相结合的省区间初始碳排放权“混合分配方案”,揭示初始碳排放权分配对行业和省区碳减排及其交易策略的影响机制,从区域碳排放权总量设定、行业覆盖范围确定和初始碳排放权分配三方面出发改进碳排放权交易的理论体系,深入探讨我国碳交易机制的设计问题。研究发现,1)在碳减排“双重”目标的背景下,我国未来碳排放权总量将呈现高度的不确定性,2018~2030年我国碳减排配额总量将在4484.44~6457.46百万吨之间。与调整未来经济增速和碳排放总量的达峰时间相比,强化碳排放强度的下降目标将显著增加我国未来碳减排压力。2)扩大碳交易机制的行业覆盖范围有助于提升我国碳减排的效率性和公平性,但其边际效益将呈现递减趋势。在29个行业中,将电热生产等6个行业纳入碳交易机制即可实现约80%的成本下降,表明较小的行业覆盖范围已可节省绝大部分的碳减排成本。3)初始碳排放权分配方案不会影响我国碳减排成本,但会对省区和行业碳减排及其交易策略产生显著影响。从省区维度来看,“混合分配方案”可以满足各省区对初始碳排放权分配的差异化偏好、保障碳减排“双重”目标的如期实现,同时有助于提升省区间碳减排的公平性和碳交易市场的安全性。从行业维度来看,排放祖父法有助于缩小行业间碳减排成本的差异、控制行业间碳减排配额的交易规模,从而提升行业间碳减排的公平性和碳交易市场的安全性。
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