In:
Atmospheric Chemistry and Physics, Copernicus GmbH, Vol. 20, No. 19 ( 2020-10-06), p. 11371-11385
Abstract:
Abstract. China's fossil-fuel CO2 (FFCO2) emissions accounted for approximately 28 %
of the global total FFCO2 in 2016. An accurate estimate of China's FFCO2
emissions is a prerequisite for global and regional carbon budget analyses and the monitoring of
carbon emission reduction efforts. However, significant uncertainties and discrepancies exist in
estimations of China's FFCO2 emissions due to a lack of detailed traceable emission
factors (EFs) and multiple statistical data sources. Here, we evaluated China's FFCO2 emissions from nine published global and regional emission datasets. These datasets show that the
total emissions increased from 3.4 (3.0–3.7) in 2000 to 9.8 (9.2–10.4) Gt
CO2 yr−1 in 2016. The variations in these estimates were largely due to the
different EF (0.491–0.746 t C per t of coal) and activity data. The large-scale patterns
of gridded emissions showed a reasonable agreement, with high emissions being concentrated in major city clusters, and the standard deviation mostly ranged from 10 % to 40 % at the provincial level. However, patterns beyond the provincial scale varied significantly, with the top 5 % of
the grid level accounting for 50 %–90 % of total emissions in these datasets. Our findings highlight the significance of using locally measured EF for Chinese coal. To reduce
uncertainty, we recommend using physical CO2 measurements and use these values for
dataset validation, key input data sharing (e.g., point sources), and finer-resolution validations at various levels.
Type of Medium:
Online Resource
ISSN:
1680-7324
DOI:
10.5194/acp-20-11371-2020
DOI:
10.5194/acp-20-11371-2020-supplement
Language:
English
Publisher:
Copernicus GmbH
Publication Date:
2020
detail.hit.zdb_id:
2092549-9
detail.hit.zdb_id:
2069847-1
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