[不同行政尺度下中国碳预算的时空变化特征]。

Q2 Environmental Science
Hai-Yue Lu, Jiao-Jiao Qi, Yan-Lei Ye, Bei-Er Zhang, Jing-Lu Sun, Can-Can Yang, Ming-Wei Zhao
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引用次数: 0

摘要

当前,科学合理地明确 "双碳 "背景下的碳减排措施已成为全球共同关注的问题。中国的行政区划对相关政策的制定和实施有着显著的影响。因此,必须准确计算中国不同尺度行政区划下的碳排放量。碳吸收和碳排放的时空变化特征可以为我国不同行政区域制定合理的、差异化的碳减排政策提供科学依据。为此,本研究利用遥感、统计等多源数据,综合生态模型、统计、GIS空间分析等方法,分析了我国不同行政区划(省、市、县)碳排放和碳吸收的时空动态变化特征。时空动态变化特征。结果表明:①2000-2021 年,中国植被碳吸收总量持续增长,平均值逐渐增大。不同行政区域碳排放量的时空变化存在差异。小尺度的时空变化更为明显。碳排放量呈现出明显的 "北高南低、东高西低 "的空间差异。CPI在行政区尺度上的时空分布与碳排放相似,总体呈逐年上升趋势。碳排放对碳吸收的压力从东部地区向中西部地区逐渐减弱。时空热点分析表明,我国碳吸收冷热点空间分布总体情况如下: 在 "东热西冷 "的空间格局中,碳排放冷热点空间分布呈现集聚特征。省级尺度主要是振荡型热点,而市级和县级尺度主要是连续型热点。进一步的研究结果表明:①中国不同地区、不同时期的碳吸收量呈现出显著的差异性,尤其是中部和东部地区。通过增加碳吸收来抵消碳排放的可能性依然存在。在同一尺度上,行政区域(如不同省份)在同一尺度上,行政区域(如不同省份)和下级行政区域(如同一省份的不同城市)的碳吸收量存在不同程度的差异。在碳吸收和碳排放方面表现出不同程度的差异。因此,以省级行政区为例,在后续制定碳交易、碳减排等政策时,应首先考虑省内不同城市之间的排放协调,然后再考虑省际之间的协调,这样有望更好地推动相关政策的实施。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
[Characteristics of Spatiotemporal Changes in China's Carbon Budget at Different Administrative Scales].

Currently, scientifically and reasonably specifying carbon emission reduction measures in the context of "double carbon" has become a common concern worldwide. China's administrative divisions have a notable impact on the formulation and implementation of relevant policies. Therefore the carbon emissions must be calculated accurately under China's administrative divisions at different scales. The spatiotemporal change characteristics of absorption and carbon emissions can provide scientific basis for the formulation of reasonable and differentiated carbon emission reduction policies in different administrative regions in China. To this end, this study used multi-source data such as remote sensing and statistics and integrated ecological models, statistics, and GIS space analysis and other methods to analyze the spatiotemporal dynamic change characteristics of carbon emissions and carbon absorption at different administrative scales (provinces, cities, and counties) in China. The results showed that: ① The total carbon absorption of vegetation in China continued to increase from 2000 to 2021 and the average value gradually increased. Differences were observed in spatiotemporal changes in carbon emissions at different administrative scales. The spatiotemporal changes at smaller scales were more evident. Carbon emissions showed obvious spatial differences of "high in the north and low in the south, high in the east and low in the west." ② The spatiotemporal distribution of CPI at the administrative scale was similar to that of carbon emissions and the overall trend was increasing annually. The pressure of carbon emissions on carbon absorption gradually weakened from the east to the central and western regions. ③ Spatiotemporal hotspot analysis showed that the overall spatial distribution of cold and hot spots in China's carbon absorption was as follows: In the spatial pattern of "hot in the east and cold in the west," the spatial distribution of cold and hot spots of carbon emissions showed agglomeration characteristics. The provincial scale was primarily oscillating hotspot whereas municipal and county scales were majorly continuous hot spots. Further results revealed that: ① Carbon absorption in different regions and periods in China showed significant variability, especially in the central and eastern regions. The possibility of offsetting carbon emissions by increasing carbon absorption remains. ② At the same scale, administrative regions (such as different provinces) and lower-level administrative regions at another scale (such as different cities in the same province) showed varying degrees of variability in carbon absorption and carbon emissions. Therefore, taking provincial administrative regions as an example for subsequent formulation considering carbon trading, emission reduction, and other policies, we should first consider the coordination of emissions between different cities in the province and then consider the coordination between provinces, which is expected to better promote the implementation of relevant policies.

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环境科学
环境科学 Environmental Science-Environmental Science (all)
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4.40
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