Skip to main content

Advertisement

Log in

Impacts of radiative effect of pre-monsoon biomass burning aerosols on atmospheric circulation and rainfall over Southeast Asia and southern China

  • Published:
Climate Dynamics Aims and scope Submit manuscript

Abstract

Biomass burning aerosols (BBA) emitted from Southeast Asia in boreal spring can alter the regional climate via their strong radiative effect. In this study, we have examined the radiative impacts of BBA on the atmospheric circulation and rainfall during the emission season (April–May) using the Weather Research and Forecasting model with chemistry module. Results show that the surface cooling and the atmospheric heating induced by the semi-direct radiative effect of BBA can exert regional heterogeneous influences on precipitation over Southeast Asia and downwind southern China, by disturbing the atmospheric stability, regional circulation and moisture transport. Increased stability (cooling below and warming above) within the planetary boundary layer inhibits local shallow convection and rainfall over mainland Southeast Asia, leading to a build-up of available convective potential energy that favors precipitation downstream in coastal South China. On the other hand, increased solar heating by absorbing aerosols can serve as an anomalous heat source in the low-mid troposphere, inducing a low-level cyclonic wind anomaly and convergence and a mid-level anticyclonic wind anomaly and divergence, along with strong ascending motion reaching the mid-high troposphere. Eventually, the modified stability and regional moisture transport lead to significant redistribution of precipitation. The enhanced (weakened) moist and warm southwesterly wind due to BBA increase (decrease) rainfall over the southern coast (northern inland) of southern China. Extremely, enhanced heavy rain events are found to be associated with an intensified low-level jet stream along coastal South China.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12

Similar content being viewed by others

Data availability

All the data are in this paper are publicly available and cited in the references. The MERRA-2, GPM and GLDAS data are available at https://disc.gsfc.nasa.gov/. The GODAS data are available at https://www.cpc.ncep.noaa.gov/products/GODAS/. The EDGAR v5.0 data are available at https://edgar.jrc.ec.europa.eu/dataset_ap50, and the ERA-interim data at https://apps.ecmwf.int/datasets/data/interim-full-daily/levtype=sfc/. The OISST data are available at https://www.ncei.noaa.gov/data/sea-surface-temperature-optimum-interpolation/v2/.

Abbreviations

AOD/AOT:

Aerosol optical depth/thickness

ARF:

Aerosol radiative forcing

BB:

Biomass burning

BBE:

Biomass burning emission

BBA:

Biomass burning aerosol

CAPE:

Convective available potential energy

CSC:

Coastal South China

EHP:

Elevated heat pump

ICP:

The Indochinese peninsula

LLJ/BLJ:

Low-level jet/boundary layer jet

NICP:

Northern Indochinese peninsula

PBL:

Planetary boundary layer

SWC:

Southwestern China

SCS:

The South China Sea

TOA:

Top of the atmosphere

References

Download references

Acknowledgements

This study was supported by the Guangdong Major Project of Basic and Applied Basic Research (2020B0301030004), the Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) (No. 311020008), and the “111-Plan” Project of China (B17049).

Funding

Southern Marine Science and Engineering Guangdong Laboratory (311020008).

Author information

Authors and Affiliations

Authors

Corresponding authors

Correspondence to Wenjie Dong or Song Yang.

Ethics declarations

Conflict of interest

The authors declare that they have no conflict of interest.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Supplementary Information

Below is the link to the electronic supplementary material.

Supplementary file1 (DOCX 245 KB)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Yang, S., Lau, W.K.M., Ji, Z. et al. Impacts of radiative effect of pre-monsoon biomass burning aerosols on atmospheric circulation and rainfall over Southeast Asia and southern China. Clim Dyn 59, 417–432 (2022). https://doi.org/10.1007/s00382-021-06135-7

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00382-021-06135-7

Keywords

Navigation