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-2019-632
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2019-632
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 21 Aug 2019

Submitted as: research article | 21 Aug 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).

The Impacts of Biomass Burning Activities on Convective Systems in the Maritime Continent

Hsiang-He Lee1,a and Chien Wang1,2,b Hsiang-He Lee and Chien Wang
  • 1Center for Environmental Sensing and Modeling, Singapore-MIT Alliance for Research and Technology, Singapore
  • 2Center for Global Change Science, Massachusetts Institute of Technology, Cambridge, MA, USA
  • anow at: Atmospheric, Earth, and Energy Division, Lawrence Livermore National Laboratory, Livermore, CA, USA
  • bnow at: Laboratoire d'Aerologie/CNRS/University of Toulouse, Toulouse, France

Abstract. Convective precipitation associated with Sumatra squall lines and diurnal rainfall over Borneo is an important weather feature of Maritime Continent in Southeast Asia. Over the past few decades, biomass burning activities have been widespread during summertime over this region, producing massive fire aerosols. These additional aerosols brought to the atmosphere, besides influencing local radiation budget through directly scattering and absorbing sunlight, can also act as cloud condensation nuclei or ice nuclei to alter convective clouds and precipitation in the Maritime Continent via the so-called aerosol indirect effects. Based on four-month simulations with or without biomass burning aerosols conducted using the Weather Research and Forecasting model with chemistry package (WRF-Chem), we have investigated the aerosol-cloud interactions associated with the biomass burning aerosols in the Maritime Continent. Results from selected cases of convective events have shown significant impacts of fire aerosols on the weak convections in hydrometeors and rainfall amount either in the Sumatra or Borneo region. Statistical analysis over the fire season also suggests that fire aerosols have substantial impacts on the nocturnal convections associated with the local anticyclonic circulation in the western Borneo. In addition, near surface heating from absorbing aerosols emitted from fires could weaken land breezes and thus the convergence of anticyclonic circulation. Therefore, the rainfall intensity of the nocturnal convections has been significantly decreased during the fire events.

Hsiang-He Lee and Chien Wang
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Login for Authors/Co-Editors] [Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Hsiang-He Lee and Chien Wang
Hsiang-He Lee and Chien Wang
Viewed  
Total article views: 255 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
202 48 5 255 4 5
  • HTML: 202
  • PDF: 48
  • XML: 5
  • Total: 255
  • BibTeX: 4
  • EndNote: 5
Views and downloads (calculated since 21 Aug 2019)
Cumulative views and downloads (calculated since 21 Aug 2019)
Viewed (geographical distribution)  
Total article views: 239 (including HTML, PDF, and XML) Thereof 238 with geography defined and 1 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 20 Oct 2019
Publications Copernicus
Download
Short summary
This study has demonstrated how biomass burning activities could affect convective systems in the Maritime Continent by altering cloud microphysics and dynamics. Because near-surface heating from the absorption of fire aerosols can enhance the prevailing wind from the ocean during the daytime and further weaken land breeze and surface convergence in the nighttime, it changes the diurnal rainfall intensity, especially those low-level wind patterns associated with the weak westerly (WW) regime.
This study has demonstrated how biomass burning activities could affect convective systems in...
Citation