Journal of Geo-information Science >
Spatialization of Carbon Emissions in Guangzhou City by Combining Luojia1-01 Nighttime Light and Urban Functional Zoning Data
Received date: 2021-11-15
Revised date: 2021-12-01
Online published: 2022-08-25
Supported by
National Natural Science Foundation of China(41801307)
National Natural Science Foundation of China(42007406)
Guangzhou Science and Technology Plan Project(202102020666)
A reasonable spatialization of urban carbon emissions is an important prerequisite for formulating clear carbon emission reduction policies. However, previous studies relied heavily on the nighttime light data with coarse spatial resolution and did not consider the huge differences of carbon emissions between various industry sectors. Therefore, the corresponding results cannot accurately reflect the spatial distribution of carbon emissions. To solve the disadvantages of previous methods, this study proposed a more reasonable method for the spatialization of carbon emissions. Firstly, three statistical models were used to estimate the carbon emissions of various industry sectors for Guangzhou in 2019. Next, the spatial distribution of carbon emissions was simulated based on the combined use of Luojia1-01 nighttime light and urban functional zoning data. Based on the spatialization result, both the global and local spatial autocorrelation analyses were carried out to reveal the spatial characteristics of carbon emissions in Guangzhou. Finally, the random forest model was used to investigate the socio-economic driving factors behind the carbon emissions in Guangzhou. The results are summarized as follows: (1) Although the carbon emissions of Guangzhou increased slowly after 2011, the total emission volume still reached 83.12 million tons in 2019, in which the transportation sector played a dominant role; (2) Compared with the commonly-used ODIAC (1 km), EDGAR (10 km) carbon emission products and the carbon emission spatialization results based on NPP-VIIRS (500 m), the result generated by high resolution (130 m) nighttime light and urban functional zoning data can more accurately characterize the spatial differences of carbon emissions; (3) There was a significant positive global spatial autocorrelation of carbon emissions in Guangzhou, resulting in highly concentration areas of secondary and tertiary sectors; (4) The main influencing factors for the secondary sector's carbon emissions were public budget revenue, GDP of the secondary sector, public budget expenditure, and fixed asset investment. In comparison, the major contributors to the tertiary sector's emissions were retail sales of consumer goods, GDP of the tertiary sector, GDP per district, and population. In summary, this study carefully considers the differences in industry structure, and then utilizes the high-resolution nighttime light data to investigate the distribution pattern of carbon emissions. The results will be helpful for policy-makers to formulate reasonable carbon emission reduction and industrial optimization strategies.
LU Yifan , LIANG Yingran , LU Siyan , XIAO Yue , HE Xiaoyu , LIN Jinyao . Spatialization of Carbon Emissions in Guangzhou City by Combining Luojia1-01 Nighttime Light and Urban Functional Zoning Data[J]. Journal of Geo-information Science, 2022 , 24(6) : 1176 -1188 . DOI: 10.12082/dqxxkx.2022.210610
表1 本研究所需数据及其来源Tab. 1 Data and sources for this study |
数据 | 时间 | 来源 |
---|---|---|
城市功能分区[25] | 2019年 | 清华大学地球系统科学系 |
“珞珈一号”夜间灯光[26] | 2018年 | 武汉大学测绘遥感信息 工程国家重点实验室 |
NPP-VIIRS夜间灯光数据 | 2019年 | 美国国家海洋和大气管理局 |
广州市碳排放总量 | 1997—2017年 | 中国碳核算数据库 |
广州市各行业碳排放量比例 | 2019年 | 《广州市碳排放达峰和“十四五”低碳发展战略路径研究》报告 |
ODIAC碳排放产品 | 2019年 | Open-source Data Inventory for Anthropogenic CO2 Emissions Database for Global Atmospheric Research |
EDGAR碳排放产品 | 2019年 | |
各行政区的社会经济指标 | 2019 | 广州市统计局 |
表2 广州市2019年分行业碳排放预测Tab. 2 Carbon emissions forecast of various industry sectors for Guangzhou in 2019 |
居民生活消费 | 第一产业 | 第二产业 | 第三产业(不含交通) | 交通 | |
---|---|---|---|---|---|
产业碳排放结构/% | 15.4 | 0.6 | 41.2 | 5.8 | 37.0 |
分产业碳排放量/百万吨 | 12.8003 | 0.4987 | 34.2450 | 4.7943 | 30.7806 |
图3 2018年广州市夜间灯光数据分区结果Fig. 3 Partition of the nighttime light data based on urban functional zoning for Guangzhou in 2018 |
表3 广州市2019年各行业碳排放系数Tab. 3 Carbon emission coefficients of various industry sectors for Guangzhou in 2019 |
行业分区 | 灯光碳排放系数(t碳/单位DN值) |
---|---|
居民生活消费 | 0.45×10-4 |
第二产业 | 1.36×10-4 |
第三产业(不含交通) | 0.80×10-4 |
交通 | 5.20×10-4 |
图5 广州分行业碳排放空间分布模拟结果与ODIAC产品结果对比Fig. 5 Comparison between our result and the result of ODIAC products in Guangzhou |
图6 广州分行业碳排放空间分布模拟结果与EDGAR产品结果对比Fig. 6 Comparison between our result and the result of EDGAR products in Guangzhou |
表4 第二、三产业碳排放影响因素重要性Tab. 4 Importance of the driving factors behind carbon emissions of the secondary and tertiary industry sectors |
影响因素 | 第二产业碳排放影响因素重要性(排序) | 第三产业碳排放影响因素重要性(排序) |
---|---|---|
一般公共预算收入 | 4.32(1) | 0.55(8) |
一般公共预算支出 | 2.64(3) | 1.41(5) |
总GDP | 0.79(8) | 2.07(3) |
产业GDP | 3.74(2) | 2.69(2) |
城镇化率 | 1.40(5) | 0.50(9) |
固定资产投资额 | 2.34(4) | 1.07(6) |
消费品零售总额 | 1.40(6) | 4.36(1) |
常住人口密度 | 1.10(7) | 0.82(7) |
常住人口数量 | 0.40(9) | 1.76(4) |
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