Arctic Research Directory

ID-13 :   Role of Arctic cyclone for large sea ice reduction on August 2012




Role of Arctic cyclone for large sea ice reduction on August 2012


We simulate the Arctic Cyclone generated in arctic region at 3 Aug. 2012 using the NICAM and COCO coupling model. This cyclone is thought as main factor to reduce the sea ice in year of 2012. Our purpose is to estimate the influence of the Arctic Cyclone on the sea ice reduction.

Model Characteristics

Atmospheric model (NICAM) coupled in our model uses the non-hydrostatic equation (does not use the cumulus param.) with high-horizontal resolution, which can simulate the arctic clouds with explicitly.

Computing Environment

FX10 (University of Tokyo)

Principal Investigator

Hiroyasu Hasumi
Atmosphere and Ocean Research Institute, The University of Tokyo

Data Information

Model Name
Abstract (Brief description of the experiment contents (initial conditions, boundary conditions, etc.))
(1) This is the dataset simulated by high resolution atmospheric model of which can simulate the clouds with 10 km-mesh order over the globe. (2) Arctic cyclone generated in 3 August 2012 impacts on the large sea ice reduction. Initial conditon for atmopsheric model is based on the National Center for Environmental Prediction (NCEP) Global Data Assimilation System (GDAS). The initial conditions for COCO are determined as follows. The model was integrated under the atmospheric boundary conditions of the JRA-55. We use 6-hourly data for the 2-m air temperature, wind speed, and humidity; and 3-hourly data for the wind stress vector, net short wave, downward long wave, and water flux. Then, we calculate the ocean conditions from 1 January 1958 to 3 August 2012 using hindcasts. (3) Integration of NICOCO was perfrormed for 12 days, starting from 3 August 2012. We investigated the impact of Arctic cyclone on large reducution of sea ice. Grid Information Dimension Size (slice number of the dimension) row: 640 column: 320 vertical: 40 Resolution Unit row: 0.5625 (deg) column: 0.5625 (deg) vertical: 80, 248, 429, 625, 835, 1062, 1306, 1570, 1853, 2160, 2489, 2845, 3228, 3642, 4087, 4567, 5084, 5642, 6243, 6891, 7590, 8342, 9154, 10029, 10971, 11988, 13083, 14264, 15536, 16908, 18387, 19980, 21698, 23550, 25546, 27697, 30016, 32515, 35209, 38113 (m)
Temporal Extent
Begin Date2012-08-03
End Date2012-08-15
Temporal Characteristics30 minutes for atmospheric data. 1 hour for oceanic data.
Geographic Bounding Box
North bound latitude90.0
West bound longitude0.0
Eastbound longitude360.0
South bound latitude-90.0
Article (the article written using this data)
Kubokawa, H., M. Satoh, T. Kawasaki, N. Kimura, H. Hasumi, Role of Arctic cyclone for large sea ice reduction on August 2012, to be submitted to J. Geophys. Res.


RollContact PersonNameHiroyasu KubokawaAffiliationAtmosphere and Ocean Research Institute, The University of
Data Registration
03:03 on Thu June 30, 2016
Last Update
06:20 on Fri July 5, 2019