Diagnostics of Northern Hemisphere blocking as simulated by Korean Integrated Model (KIM)

Blocking is one of the important meteorological phenomena that triggers severe weather in mid-latitudes. The blocking is considered a significant challenge in model predictions, and various studies have been conducted to enhance model predictability of blocking. For these reasons, this study aims to diagnose blocking using the KIM, discuss errors caused by blocking, and utilize it for further analysis. The method used to detect blocking involved the reversal method, considering conditions lasting for more than 5 days. We classified blocking into two types based on the direction of Rossby-Wave Breaking (RWB) during the sustained period. It was found that the classified blocking exhibits different impacts and areas of mid-latitude severe weathers. The distinction for the impacted areas of blocking based on the RWB enabled the definition of the influenced area for the classified blocking. Using this approach, we diagnosed patterns of errors observed in various experiments through the KIM.