Preprints
https://doi.org/10.5194/gmd-2021-232
https://doi.org/10.5194/gmd-2021-232

Submitted as: model evaluation paper 11 Aug 2021

Submitted as: model evaluation paper | 11 Aug 2021

Review status: this preprint is currently under review for the journal GMD.

Robustness of simulating aerosol climatic impacts using regional model (WRF-Chem v3.6): the sensitivity to domain size

Xiaodong Wang1, Chun Zhao1,2,3, Mingyue Xu1, Qiuyan Du1, Jianqiu Zheng1, and Yun Bi1 Xiaodong Wang et al.
  • 1School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China
  • 2CAS Center for Excellence in Comparative Planetology, University of Science and Technology of China, Hefei, China
  • 3Frontiers Science Center for Planetary Exploration and Emerging Technologies, University of Science and Technology of China, Hefei, China

Abstract. Domain size can have significant impacts on regional modeling results, but few studies examining the sensitivities of regional modeling results of aerosol impacts to domain size. This study investigates the regional modeling sensitivities of aerosol impacts on East Asian summer monsoon (EASM) to domain size. The simulations with two different domain sizes demonstrate consistently that aerosols induce the cooling of lower troposphere that leads to the anti-cyclone circulation anomalies and thus the weakening of EASM moisture transport. The aerosol-induced adjustment of monsoonal circulation results in a spatial pattern of “+-+-+” for precipitation change over the continent of China. Domain size has a great influence on the simulated meteorological fields. For example, the simulation with increasing domain size produces weaker EASM circulation, which also affect aerosol distributions significantly. This leads to the difference of simulated strength and area extent of aerosol-induced changes of lower-tropospheric temperature and pressure, which further results in different locations of circulation and precipitation anomalies over the continent of China. For example, over Southeast China, aerosols induce the increase (decrease) of precipitation from the smaller-domain (larger-domain) simulation. Different domain sizes simulate consistently aerosol-induced increase of precipitation around 30° N over East China. This study highlights the important impacts of domain size on regional modeling results of aerosol impacts on circulation and precipitation, which may not be limited to East Asia. More generally, this study also implies that proper modeling of meteorological fields with appropriate domain size is one of the keys to simulate robust aerosol climatic impacts.

Xiaodong Wang et al.

Status: open (until 28 Oct 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gmd-2021-232', Anonymous Referee #1, 08 Sep 2021 reply

Xiaodong Wang et al.

Xiaodong Wang et al.

Viewed

Total article views: 251 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
202 42 7 251 18 2 4
  • HTML: 202
  • PDF: 42
  • XML: 7
  • Total: 251
  • Supplement: 18
  • BibTeX: 2
  • EndNote: 4
Views and downloads (calculated since 11 Aug 2021)
Cumulative views and downloads (calculated since 11 Aug 2021)

Viewed (geographical distribution)

Total article views: 187 (including HTML, PDF, and XML) Thereof 187 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 28 Sep 2021
Download
Short summary
Regional model was widely used to investigate aerosol climatic impacts. However, there are few studies examining the sensitivities of modeling results to regional domain size. In this study, the regional model is used to study the aerosol impacts on East Asian Summer Monsoon system and focus on the modeling sensitivities to domain size. This study highlights the important impacts of domain size on regional modeling results of aerosol climatic impacts, which may not be limited to East Asia.