Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.668 IF 5.668
  • IF 5-year value: 6.201 IF 5-year
    6.201
  • CiteScore value: 6.13 CiteScore
    6.13
  • SNIP value: 1.633 SNIP 1.633
  • IPP value: 5.91 IPP 5.91
  • SJR value: 2.938 SJR 2.938
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 174 Scimago H
    index 174
  • h5-index value: 87 h5-index 87
Discussion papers
https://doi.org/10.5194/acp-2020-175
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2020-175
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 16 Mar 2020

Submitted as: research article | 16 Mar 2020

Review status
This preprint is currently under review for the journal ACP.

Determination and climatology of diurnal cycle of atmospheric mixing layer height over Beijing 2013–2018: Lidar measurements and implication for airpollution

Haofei Wang1,2, Zhengqiang Li1, Yang Lv1,2, Ying Zhang1, Hua Xu1, Jianping Guo3, and Philippe Goloub4 Haofei Wang et al.
  • 1State Environmental Protection Key Laboratory of Satellite Remote Sensing, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, 100101, China
  • 2University of Chinese Academy of Sciences, Beijing, 100101, China
  • 3State KeyLaboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, 100081, China
  • 4Laboratoire d’Optique Atmospherique, UMR8518, CNRS – Universit é de Lille 1, Villeneuve d’Ascq, Lille, 59000, France

Abstract. The atmospheric mixing layer height (MLH) determines the volume available for the dispersion of pollutants and thus contributes to the assessment of the pollutant concentration near the surface. The study evaluates the capability of lidar to describe the evolution of atmospheric mixing layer and then presents a long term observed climatology of MLH diurnal cycle. A system for automatic detection of the mixing layer height based on two wavelet methods (MLH and MLH') applied to lidar observations was operated from January 2013 to December 2018 in the Beijing urban area. The two dataset results are compared with radiosonde as case studies and statistical form. MLH shows good performance to calculate the convective layer height at daytime and the residual layer height at night. While MLH' has the potential to describe the stable layer height as radiosonde at night, the performance is limited due to the high range gate of lidar. A nearly six year climatology for diurnal cycle of MLH is calculated for convective and stable conditions using the dataset of MLH from lidar. The MLH characteristics of seasonal change in Beijing indicate that it is low in winter and autumn, and high in spring and summer. A significant phenomenon is found that from 2013 to 2018, the diurnal cycle of MLH increase year by year. It may partly benefit from the improvement of air quality. As to converting the column optical depth to the surface pollution, MLH from lidar shows better accuracy than that from radiosonde. Additionally, the accuracy with lidar MLH shows a diurnal cycle, with the peak at time of 14:00 LST. The study provides a significant dataset of MLH based on measurement and could be an effective reference to atmospheric models for surface air pollution calculation and analysis.

Haofei Wang et al.

Interactive discussion

Status: open (until 11 May 2020)
Status: open (until 11 May 2020)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement

Haofei Wang et al.

Haofei Wang et al.

Viewed

Total article views: 109 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
78 30 1 109 4 1 1
  • HTML: 78
  • PDF: 30
  • XML: 1
  • Total: 109
  • Supplement: 4
  • BibTeX: 1
  • EndNote: 1
Views and downloads (calculated since 16 Mar 2020)
Cumulative views and downloads (calculated since 16 Mar 2020)

Viewed (geographical distribution)

Total article views: 159 (including HTML, PDF, and XML) Thereof 156 with geography defined and 3 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 01 Apr 2020
Publications Copernicus
Download
Short summary
Lidar shows good performance to calculate the convective layer height at daytime and the residual layer height at night, as well as stable layer height at night in some case. The MLH seasonal change in Beijing indicate that it is low in winter and autumn, and high in spring and summer. A significant phenomenon is found that from 2013 to 2018, the diurnal cycle of MLH increase year by year. MLH from lidar shows better accuracy than that from radiosonde when calculates the surface pollution.
Lidar shows good performance to calculate the convective layer height at daytime and the...
Citation