Arctic Research Directory

ID-344 :   BC simulation using a regional model during R/V Mirai cruise in 2016




BC simulation using a regional model during R/V Mirai cruise in 2016


Black carbon (BC) particles strongly absorb sunlight, and it has recently emerged as a major contributor to the global climate change, possible second to CO2 and methane. To evaluate the BC transport and deposition from East Asia to the Arctic region, we have conducted model simulations using a regional chemical transport model WRF/Chem during the period of the MR16-06 cruise of R/V Mirai to the Arctic Sea in 2016.

Model Characteristics

The WRF/Chem model is an online model, and the meteorological field is calculated at every time step and simple assimilation by nudging is applied to the calculated meteorology (horizontal wind, temperature, and humidity) using NCEP-GFS forecasted data to improve the forecast skill of the meteorological field. The timestep was originally set to 6 minutes and was diagnosed based on the computational stability; the Courant number was kept at 1.0 or lower for the horizontal and vertical dimensions during the calculation. The Mellor–Yamada–Nakanishi– Niino level 2 scheme was used for the planetary boundary scheme. Morrison two-moment microphysics scheme and the G3 convection scheme were used for the calculation of the grid-scale and subgrid-scale clouds and precipitation, respectively. The model-calculated precipitation rate in these scheme is also used for the estimation of wet removal of particles in the model.

Computing Environment

JAMSTEC SC System and DA System

Principal Investigator

Masayuki Takigawa
Japan Agency for Marine-Earth Science and Technology

Data Information

Model Name
WRF/Chem version 3.8.1
Abstract (Brief description of the experiment contents (initial conditions, boundary conditions, etc.))
horizontal grids : 45 km, 400x400 grids vertical layers : 35 layers up to 100hPa calculation period: during the cruise of R/V Mirai to the Arctic since 2014 meteorological fields : NCEP FNL initial/boundary conditions for chemical species : MOZART4 chem. module : RACM (gaseous) + GOCART (particles) BC conversion from hydrophobic to hydrophilic: 2.5 days emissions: EDGAR4.2 (anthropogenic) MEGAN2 (biogenic, every 20 minutes using meteorological fields) quasi-realtime version of FINN (biomass burning, daily)
Temporal Extent
Begin Date2014-08-01
End Date2018-11-01
Temporal Characteristicshourly
Geographic Bounding Box
North bound latitude90.0
West bound longitude0.0
Eastbound longitude360.0
South bound latitude-10.0
Dimension NameDimension Size (slice number of the dimension)Resolution Unit
row39940 km
column39940 km
vertical1U, V, and concentrations (BC and O3) for the lowermosl leve in the model. 3D values will be distributed upon request from users.
Data Information
Related URL
Article (the article written using this data)
Masayuki TAKIGAWA, Masahiro YAMAGUCHI, Fumikazu TAKETANI, Yugo KANAYA and Yutaka KONDO, Polar Data Journal, Vol. 2, 1–13, 2018.


RollContact PersonNameMasayuki TakigawaAffiliationJapan Agency for Marine-Earth Science and
Data Registration
06:36 on Mon September 30, 2019
Last Update
06:36 on Mon September 30, 2019