Abstract ▼

□ Purpose & contents

The overarching goal of this proposed research is to enhance the predictability of East Asian climate by investigating a relationship between climate sensitivity and East Asian climate change. In the late 20th century, regional extreme climate events have increased in fre

□ Purpose & contents

The overarching goal of this proposed research is to enhance the predictability of East Asian climate by investigating a relationship between climate sensitivity and East Asian climate change. In the late 20th century, regional extreme climate events have increased in frequency in association with global warming. To manage climate change mitigation policies, uncertainty in regional climate change needs to be estimated and its cause must be understood. The climate sensitivity, which refers to the change in global mean surface temperature under double CO2, is a basic index of climate change research, but its effect on regional climate change has not yet been investigated. Hence, the climate sensitivity has been identified as a new factor for the uncertainty of regional climate change. The project has largely been consist of two parts: investigating how the climate sensitivity affects the East Asian climate and how the regional pattern of climate change affects the climate sensitivity.


□ Result

To reduce the uncertainty regarding the estimates of climate sensitivity and the prediction of East Asian climate change, it is essential to understand how the regional climate change brings about global climate change pattern. We attempted to investigate a fundamental mechanism by utilizing a series of atmospheric model experiments that are coupled to slab ocean model.

First of all, we showed that regional forcing can induce global climate change by investigating the fundamental reason why the tropical precipitation maximizes in the Northern Hemisphere and for the hemispheric surface temperature contrast is the northward cross-equatorial ocean heat transport in the Atlantic Ocean. In a similar context, we showed that the tropical heating is less effective at warming the globe than the extratropical heating, inferring the importance of regional pattern of surface warming in determining the climate sensitivity. Our study suggests that it is important to understand the polar climate change dynamics in order to reduce the uncertainty in the estimates of climate sensitivity. The sensitivity to the latitudinal position of regional forcing results from cloud radiative effects, so that we have participated in the benchmark study that examines the effect of uncertainty in convective scheme parameterization on the climate sensitivity. Furthermore, we studied how Arctic vegetation change and the vertical distribution of Black Carbon affect the global climate pattern and the climate sensitivity. We also shows that local heating in the extratropics perturbs tropical precipitation at all longitudes. The result suggests that the East Asian climate can be affected by polar forcing regardless of its longitudinal location whereas it can only be affected by the tropical forcing at particular longitudinal band.


□ Expected Contribution

We have newly introduced a global perspective on the East Asian climate change research. Also our study emphasizes to consider regional patterns, which are usually neglected in the studies of climate sensitivity. Hence, our studies are considered to have opened new horizons for research on climate change. The investigation of fundamental mechanism for the uncertainty of climate sensitivity is expected to reduce uncertainty in the climate prediction over Korea and to contribute to enhancing the credibility of national climate change policies. Studies on the uncertainty of the East Asian climate change are expected to have a great ripple effect as they can be applied to other regions. Furthermore, the accurate estimate of climate sensitivity will help setting a level of stabilization or of peak atmospheric CO2 concentrations and provide useful information for policy makers.

(출처:SUMMARY p.5)

목차 Contents

• 표지 ... 1
• 목차 ... 2
• 연구계획 요약문 ... 3
• 연구결과 요약문 ... 4
• 한글요약문 ... 4
• SUMMARY ... 5
• 연구내용 및 결과 ... 6
• 1. 연구개발과제의 개요 ... 6
• 2. 국내외 기술개발 현황 ... 7
• 3. 연구수행 내용 및 결과 ... 9
• 4. 목표달성도 및 관련분야에의 기여도 ... 16
• 5. 연구결과의 활용계획 ... 16
• 6. 연구과정에서 수집한 해외 과학기술정보 ... 18
• 7. 참고문헌 ... 19
• 8. 연구성과 ... 21
• 9. 국가과학기술지식정보서비스에 등록한 연구시설·장비 현황 ... 26
• 10. 연구개발과제 수행에 따른 연구실 등의 안전조치 이행실적 ... 26
• 11. 기타사항 ... 27
• 끝페이지 ... 27