KISTI 2014

This movie shows seasonal variations of 3-D temperature, which is simulated using ROMS model in the North Pacific for 2010. We utilized Probe, DVR (Direct Volume Rendering) functions and Image technique of VAPOR for this visualization. 3-D ocean temperature is expressed using DVR, which clearly shows that the North and South Equatorial Currents are meandering and propagating from east to west. We captured cross section along the equator using Probe technique in order to examine thermocline and mixed layer changes in equator vicinity.

Sea surface temperature (SST) is a major factor affecting the intensity of tropical cyclone (TC). The SST is not fixed, but decreasing during the passage of TCs due to a strong vertical mixing and upwelling. The TC-induced sea surface cooling along the track, called as "cold wake", plays a critical role in reducing the TC intensity. Here, we simulated the cold wake, a product of the air-sea interaction, during typhoon Bolaven in 2012 using a WRF-ROMS coupled model. Initial fields of WRF and ROMS are obtained from GFS and HYCOM global models, respectively.

This fiugre is the simulation result for the Planent Boundary Layer(PBL) evolution of by the LES model PALM, which is developed at the Hannover university to determine two factors, which develop PBL, that one is Surface heat flux and another is geostrophic wind which is similar to sheer stress to PBL.

Hurricane Katrina (2005) hindcast using WRF model was shown in this movie. We utilized DVR (Direct Volume Rendering), image, flow, 2D technique of VAPOR for visualization of hurricane. This movie aims to show the varying distribution of strong wind (above 17m/s) of hurricane instead of showing cloud, which is widely used in other visualizations. The winds were expressed by both flow tracking and 3-d visualization using U, V, W variables. The terrain of the United States was expressed by 3-d image, georeference and height options.

We visualize the WRF model simulation result of tropical cyclone 'NAKRI' from August 31, 2014 for 3 days. We produce wind speed variable by using U and V. We visualize structure of tropical cyclone with wind speed and the cumulated amount of precipitation is expressed on the sea level. NAKRI make a large amount of precipitation on the south sea and korean peninsula. And we can see the other tropical cyclone HALONG on the south east of figure.

This animation is 3D visualization of ROMS output for northwestern pacific. Shading Temperature use Direct Volume Rendering(DVR) in VAPOR. Cloud Cover and Sea Surface Height of 2d method.

To analyze the relationship between outgoing longwave radiation (OLR) and cyclogenesis, we visualized the strong typhoon period during Sep 17th through the 28th in 1999.  Using CMIP5 and CanESM2 data sets, it forced as boundary forcing value to WRF for 10 years integration from 1990.  We defined new variable "wind speed" by horizontal, meridional, and vertical wind and visualized in 3-D utilizing the DVR method of VAPOR.  In addition, the appearance of "wind speed" is treated by isosurface appearance method of VAPOR to show the air temperature change in altitude.  OLR was extracted only the

This Movie is showing the distribution of the temperature, salinity and current on the Korean ambient sea water for 40 days in summer. The first part is showing salinity variation for 40 days and the second part is showing current variation with the temperature value on the arrow. The salinity is expressed by Direct Volume Rendering with Lighting on function and the arrow is expressed by flow function mapped on the temperature value.

In this experiment, we investigated the process of generation and dissipation for 30th typhoon 2013 Haiyan using a three-dimensional visualization tool (VAPOR) and a output simulated by the numerical model WRF. Our result type to submit is a video with mp4 which is for streamline and cloud. We presented 3-dimensional streamline used U and V, W component variable of WRF output using Flow method in VAPOR, and then we drew 3d streamline with surface pressure shaded at lower surface pressure, which is lower than about 1000hPa.

This video is visualized result in 3D from WRF(Weather Research Forecasting) model for Heavy snowfall over Young-dong area in February 2014. The cloud had been simulated through Direct Volume Rendering(DVR) by making variable 'cloud' with QCLOUD and QICE produced from WRF output file. For focusing atmospheric condition of Youngdong, region had been controled in the cross section. The wind had been shown stream lines and vector from Flow and Barb fuction with three variable U, V, and W.