Remotely sensed and surface measurement- derived mass-conserving inversion of daily NOx emissions and inferred combustion technologies in energy-rich northern China
-
Published:2023-07-18
Issue:14
Volume:23
Page:8001-8019
-
ISSN:1680-7324
-
Container-title:Atmospheric Chemistry and Physics
-
language:en
-
Short-container-title:Atmos. Chem. Phys.
Author:
Li XiaoluORCID, Cohen Jason BlakeORCID, Qin KaiORCID, Geng Hong, Wu Xiaohui, Wu Liling, Yang Chengli, Zhang Rui, Zhang Liqin
Abstract
Abstract. This work presents a new model-free inversion estimation framework (MFIEF) using daily TROPOspheric
Monitoring Instrument (TROPOMI) NO2 columns and observed fluxes from the continuous emission monitoring system (CEMS) to quantify 3 years of daily scale emissions of NOx at 0.05∘×0.05∘ over Shanxi Province, a major world-wide energy-producing and energy-consuming region. The NOx emissions, day-to-day variability, and uncertainty on a climatological basis are computed to be 1.86, 1.03, and 1.05 Tg yr−1 respectively. The highest emissions are concentrated in the lower Fen River valley, which accounts for 25 % of the area, 53 % of the NOx emissions, and 72 % of CEMS sources. Two major forcing factors (10th to 90th percentile) are horizontal transport distance per day (63–508 km) and lifetime of NOx (7.1–18.1 h). Both of these values are consistent with NOx emissions to both the surface layer and the free troposphere. The third forcing factor, the ratio of NOx/NO2, on a pixel-to-pixel basis, is demonstrated to correlate with the combustion temperature and energy efficiency of large energy consuming sources. Specifically, thermal power plants, cement, and iron and steel companies have a relatively high NOx/NO2 ratio, while coking, industrial
boilers, and aluminum oxide factories show a relatively lower ratio.
Variance maximization is applied to daily TROPOMI NO2 columns, which
facilitates identification of three orthogonal and statistically significant
modes of variability, and successfully attributes them both spatially and
temporally to (a) this work's computed emissions, (b) remotely sensed
TROPOMI ultraviolet aerosol index (UVAI), and (c) computed transport based on TROPOMI NO2.
Funder
National Natural Science Foundation of China
Publisher
Copernicus GmbH
Subject
Atmospheric Science
Reference92 articles.
1. Abyzov, A.: Aluminum oxide and alumina ceramics (review). Part 1. Properties
of Al2O3 and commercial production of dispersed Al2O3, Refract. Ind. Ceram., 60, 24–32, https://doi.org/10.1007/s11148-019-00304-2, 2019. 2. Aho, M. J., Paakkinen, K. M., Pirkonen, P. M., Kilpinen, P., and Hupa, M.:
The effects of pressure, oxygen partial pressure, and temperature on the
formation of N2O, NO, and NO2 from pulverized coal, Combust. Flame., 102, 387–400, https://doi.org/10.1016/0010-2180(95)00019-3, 1995. 3. Akgun, F.: Investigaton of energy saving and NOx reduction possibilities in a rotary cement kiln, Int. J. Energ. Res., 27, 455–465, https://doi.org/10.1002/er.888, 2003. 4. Beirle, S., Boersma, K. F., Platt, U., Lawrence, M. G., and Wagner, T.: Megacity emissions and lifetimes of nitrogen oxides probed from space,
Science, 333, 1737–1739, https://doi.org/10.1126/science.1207824, 2011. 5. Beirle, S., Borger, C., Dorner, S., Li, A., Hu, Z. K., Liu, F., Wang, Y.,
and Wagner, T.: Pinpointing nitrogen oxide emissions from space, Sci. Adv.,
5, eaax9800, https://doi.org/10.1126/sciadv.aax9800, 2019.
Cited by
10 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|