【Applied Energy最新原创论文】中国2015年城市级温室气体排放清单及不确定性分析

网友投稿 2019-08-12 12:34

原文信息：

China City-level Greenhouse Gas Emissions Inventory in 2015 and Uncertainty Analysis

原文链接：

Highlights

A GHG emissions inventory for 305 Chinese cities is compiled for 2015.
Emissions of CO₂, CH₄, N₂O, and fluorinated GHGs are separately accounted.
The uncertainty of city-level GHG emissions is analyzed.

02摘要

城市尺度的温室气体排放核算对城市的减排工作和气候变化应对具有重要意义，尤其是对发展快速的中国城市而言。然而，现有研究尚未提供完整覆盖全国城市以及全部温室气体类型的排放清单。本文基于中国高分辨率排放数据库（CHRED3.0）以及19个研究组共计137名研究者的实地调研和校验，使用自下而上的方法，首次建立了包括二氧化碳（CO₂）、甲烷（CH₄）、氧化亚氮（CH₄）和含氟温室气体（F-GHGs）的中国城市级排放清单，覆盖中国305个城市，并对排放清单进行了不确定性分析。结果显示，城市总温室气体排放呈现东高西低的特点，而城市人均排放呈现北高南低的特点。四种主要温室气体（CO₂、CH₄、N₂O及F-GHGs）的排放呈现各异的空间格局，与城市产业结构、能源结构以及工业点源和农业面源等的分布有关。各城市温室气体排放的不确定性与城市数据来源高度相关。最后，本文也提出包括提高城市统计数据的质量、加强城市间减排竞争等建议，以完善城市级温室气体排放清单和低碳发展规划。

Abstract

Accounting and understanding greenhouse gas (GHG) emissions at the city level are of great importance because cities are the focus of future mitigation and adaption activities to address climate change, especially in developing nations like China. However, existing studies have not yet provided a complete and updated emissions inventory of city-level GHGs for China in terms of city and GHG-type coverage. In this paper, we rigorously assemble a dataset that contains GHG emissions including carbon dioxide, methane, nitrous oxide, and fluorinated GHGs for 305 Chinese cities, based on a high-resolution emissions database (China High-Resolution Emission Database, CHRED 3.0) and first-hand on-site data collection and verification by 19 groups of 137 researchers using a bottom-up method, and analyze the uncertainty of the emissions. Results show that total GHG emissions are high in cities in eastern China and low in cities in west, while per capita GHG emissions are high in northern cities and low in southern cities. The emissions of four types of GHGs (CO₂, CH₄, N₂O and fluoridated GHGs) share different spatial distributions, due to variant industrial structure, energy structure, industry point sources and agricultural surface sources, etc. The uncertainty of GHG emissions is highly related to the source data of cities. Finally, we propose policy recommendations, including improving data quality and strengthening competitions of city-level emission reduction, to improve city-level emissions data integrity and low-carbon development strategies.

Keywords：

Greenhouse gas emissions inventor

Greenhouse gas emissions accounting

City

Uncertainty analysis

China