초록 ▼

• CMIP3/CMIP5 기후 모델 자료에서 현재 및 미래 기후변화아래에서 엘니뇨 변동성 분석
• 미래 기후변화 아래에서 동아시아 몬순 변동성의 변조 및 엘니뇨/라니냐 상관성 분석
• 동아시아 겨울철 몬순 변동의 예측성 분석
• 엘니뇨/라니냐 진단의 새로운 기법을 개발하고 두 타입 엘니뇨 진단 기법 개발.
• 한반도를 포함한 동아시아 기후와 엘니뇨/라니냐와의 상관성 분석과 역학과정 연구
• 산업혁명 이전의 지난 1000년 동안의 엘니뇨 변동성 분석
• 과거, 현재, 미래의 열대 변동성의 변화에 따른

• CMIP3/CMIP5 기후 모델 자료에서 현재 및 미래 기후변화아래에서 엘니뇨 변동성 분석
• 미래 기후변화 아래에서 동아시아 몬순 변동성의 변조 및 엘니뇨/라니냐 상관성 분석
• 동아시아 겨울철 몬순 변동의 예측성 분석
• 엘니뇨/라니냐 진단의 새로운 기법을 개발하고 두 타입 엘니뇨 진단 기법 개발.
• 한반도를 포함한 동아시아 기후와 엘니뇨/라니냐와의 상관성 분석과 역학과정 연구
• 산업혁명 이전의 지난 1000년 동안의 엘니뇨 변동성 분석
• 과거, 현재, 미래의 열대 변동성의 변화에 따른 중위도 대기 순환의 변동성 분석
• 홀로세 중엽 동안의 엘니뇨 변동의 약화 원인 분석
• 2012년 열대 해양 변화 진단

Abstract ▼

Ⅳ. Results
• Analyzing the ENSO variability in the present and the future climate using the CMIP3/CMIP5 multi-model datasets
- Explanation on the dynamical processes why the ENSO properties (i.e., ENSO's spatial structure) simulated in the CMIP3 and CMIP5 are different.
- There are no signi

Ⅳ. Results
• Analyzing the ENSO variability in the present and the future climate using the CMIP3/CMIP5 multi-model datasets
- Explanation on the dynamical processes why the ENSO properties (i.e., ENSO's spatial structure) simulated in the CMIP3 and CMIP5 are different.
- There are no significant changes on the occurrence frequency of extreme El Nino event to use a traditional definition from the present climate to the future climate in the CMIP5 climate model
- Explanation on the mechanism why the ENSO-PDO liner relationship increases under global warming.
- We found that the spatial pattern of moderate El Nino changes under global warming, which is associated with the mean state changes in the Pacific.
• Analyzing the modulation of East Asia monsoon under global warming and its relationship of ENSO in the observations and CMIP5 climate models.
- We found that there are little changes in the spatial structure of summer precipitation variability over East Asia from the present climate to the future climate.
- Analysis of the characteristics of East Asian summer monsoon and its relationship with El Nino/La Nina
- Analysis the characteristics in the precipitation variability over East Asia during summer and its relationship with El Nino/La Nina in the present climate. Aanlysis the characteristics of summer precipitation variability over East Asia in the futureclimate.
• Analysis in the predictability of East Asian winter monsoon.
- We found that the predictability of East Asian winter monsoon changes on the low-frequency timescales, which is mainly associated with the coupling of Siberian high pressure and Aleutian low pressure.
• Analyzing the definition of El Nino/La Nina events
- We suggest an appropriate definition of El Nino and La Nina events in the operational aspect.
- The new definition can declare the onset timing of El Nino and La Nina several months earlier than that of the KMA definition.
• Analyzing the relation between climate variability in Korea and two types of El Nino, and their sensitivity to definition of two types of El Nino
- We found that two different definitions exhibit relatively strong relationship between El Nino events and the Korean climate variabiles when two types of El Nino are separated.
- Two types of El Nino show distinct global teleconnection patterns when the definitions are used.
• Analyzing the precipitation variability over Korean Peninsula and atmospheric circulation over East Asia associated with ENSO
- Analysis the precipitation variability over East Asia during summer and itsrelationship with El Nino/La Nina.
- We found that the Korean precipitation in September tends to decrease during ENSO developing phase, which is associated with the cyclonic flow over subtropical North Pacific.
- The relation between precipitation over Korean Peninsula and ENSO is strong during early winter, but the relation is weakened during late winter.
• Analyzing the atmospheric circulation changes over East Asia and North Pacific associated with ENSO in the observations and seasonal prediction model.
- We found that the intra-winter changes are controlled by the relative roles of the CP and WNP precipitation on the extratropical teleconnection over the North Pacific.
- The prediction model failed to capture the observed intra-winter changes in the teleconnection pattern. This model's discrepancy in the extratropical teleconnection is partly originated from the failure in predicting the relative magnitude of CP and WNP precipitation anomalies.
• Analysis on El Nino characteristics during th last millenium (LM)
- Two types of El Nino for LM simulation was not well separated compared to that shown in pre-industrial simulation
- Reduced atmospheric response to the SST change during LM might cause it
• Past, present and future change in mid-latitude atmospheric circulation associated with tropical climate variability
- Regardless of weak El Nino/La Nina variability during mid-Holocene, PDO intensity during mid-Holocene was maintained because of the strong atmospheric internal variability
• Tropical western Pacific convection influences the mid latitude atmospheric circulati on by virtue of Hadley Cell
- Tropical eastern pacific warming due to global warming causes the southward migration of ITCZ and eastern North Pacific Jet
• Analysis on the cause of suppressed El Nino activity during mid Holocene
- 6000 year ago simulation from PMIP2 and PMIP3 commonly showed the general weakening of El Nino variability
- Not only the El Nino but also annual cycle was weakend during Mid Holocene in PMIP
- Main process to drive the weakening of El Nino was the enhanced damping by mean current
• Analysis on the development of 2012 El Nino