基于修正碳账户的京津冀县域生态补偿量化及优先级分区

随着我国生态文明进程的不断加快,生态补偿的作用也日益凸显。京津冀作为我国的重要经济区,其经济发展的同时也伴随着大量的碳排放,为促进京津冀一体化战略的深入实施与生态环境建设,基于修正碳账户,选择模型构建法、空间相关性分析与重心迁移等手段,以县域为评价单元对京津冀地区进行生态补偿标准量化和优先级分区研究。结果表明:(1)修正前的京津冀地区碳账户呈现西北低,东南高的趋势,而修正后的碳账户由于兼顾了区域间本地差异,空间分布更加均匀;(2)生态补偿额度高-高聚集区主要分布于北京周边、石家庄周边以及邯郸-邢台一带,生态补偿额度低-低聚集区主要集中分布在京津冀地区北部县域;(3)京津冀生态补偿额度重心在115°45''—116°2''E,38°10''—38°20''N(献县和饶阳县)范围内移动,整体呈现由东北向西南变化的趋势;(4)2007年到2017年生态补偿支付区前五名(大厂回族自治县、柏乡县、新河县、海兴县、任县)和受偿区前五名(尚义县、阜平县、沽源县、康保县、赤城县)基本保持稳定。研究结果为京津冀协同发展制定相应减排固碳政策有重要参考价值,为实现双碳目标有促进作用。

Quantification and priority zoning of ecological compensation at county level in Beijing-Tianjin-Hebei based on modified carbon account

Ecological compensation mechanism is an important part of China''s ecological civilization system and an important means to achieve the goal of carbon peak and carbon neutrality, with the continuous acceleration of China''s ecological civilization, the role of ecological compensation is also becoming increasingly prominent. As an important economic zone in China, with the characteristics of high population density and high industrial cluster, the economic development of Beijing-Tianjin-Hebei region is accompanied by a large amount of carbon emissions. To promote the in-depth implementation of the Beijing-Tianjin-Hebei integration strategy and ecological environment construction, this paper is based on the revised carbon account and uses the model construction method, spatial correlation analysis, and center of gravity shift to quantify ecological compensation standards and prioritize zoning research in the Beijing-Tianjin-Hebei region with counties as evaluation units. The results show that: (1) the unrevised carbon accounts show a trend of low in the northwest and high in the southeast of the Beijing-Tianjin-Hebei region, while the revised carbon accounts are more evenly spatially distributed due to taking local differences between regions into account. (2) The high-high ecological compensation amount is mainly distributed around Beijing, around Shijiazhuang, and Handan-Xingtai, while the low-low ecological compensation amount is mainly concentrated in the northern counties of the Beijing-Tianjin-Hebei region, the number of each cluster area showed a change trend of "increase first and then decrease later". (3) The center of gravity of ecological compensation amount in Beijing, Tianjin and Hebei Province moves within 115°45''-116°2'' E, 38°10''-38°20''N (Xian County and Raoyang County), with an overall trend from northeast to southwest, while in some years, the center of ecological compensation is reproduced from the southwest to the northeast. (4) The top five ecological compensation payment areas (Dachang Hui Autonomous County, Baoxiang County, Xinhe County, Haixing County, and Ren County) and the top five compensation areas (Shangyi County, Fuping County, Guyuan County, Kangbao County, and Chicheng County) remained basically stable from 2007 to 2017. The amount of ecological compensation in the overall payment area is greater than the amount of ecological compensation in the compensation area, and the top 20 regions of compensation subject and compensation receptor can basically realize the balance of ecological compensation at the county level. The results of this paper have important reference values for the development of corresponding emission reduction and carbon sequestration policies for the synergistic development of Beijing, Tianjin and Hebei, and contribute to the realization of the dual carbon goals.