메뉴 건너뛰기
.. 내서재 .. 알림
소속 기관/학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
로그인 회원가입 고객센터 ENG
주제분류

추천
검색

논문 기본 정보

자료유형
학위논문
저자정보

주진희 (경북대학교, 경북대학교 대학원)

지도교수
박두선
발행연도
2023
저작권
경북대학교 논문은 저작권에 의해 보호받습니다.

이용수6

표지
AI에게 요청하기
추천
검색

이 논문의 연구 히스토리 (3)

초록· 키워드

오류제보하기
This study examined the cause of seasonal variability in interdecadal changes of tropical cyclone genesis frequency (TCGF) during period 1982-2020, which have decreased significantly only during from October to December (OND) over the western North Pacific (WNP). Because the large-scale relative vorticity decreased significantly in the majority of the main development region (MDR) over WNP only in OND, the TCGF could decreased throughout the MDR significantly at 95% confidence levels only in OND. In consequences of linear baroclinic model (LBM) experiments, the changes in the large-scale circulation could be caused by diabatic heating induced by increased precipitation in climate convective region. When the precipitation in that region increased, which means that the convection also intensified, the low-level convergence was enhanced. Consequently, the anomalous easterly and the anomalous anticyclone can be formed on the east of the climate convective regions. Since the climate convective region was located more westward (5°S-10°N, 80°E-110°E) during OND, the large-scale anomalous anticyclone could extended westward than other seasons (Jan to Sep). According to the “rich-get-richer mechanism”, under increased sea surface temperature (SST) by zonally uniform global warming, precipitation could increase in climatological convective regions. To figure out that the rich-get-richer mechanism could occur in zonally different SST variation in tropics (i.e. La Niña-like SST pattern), which was identified in observed SST, we conducted the Model for Prediction Across Scales – Atmosphere (MPAS-A) consisted of three experimental designs. One of them was prescribed by climatological SST during period 1982-2020, another was forced by La Niña-like warming, and the other was forced by tropical uniform warming that supposed by global warming. As a results of MPAS-A run, for two forced by SST forcing, precipitation have increased in the climate convective regions, and the anomalous anticyclone also was located on the east of that regions. Thus, because of the increased precipitation in climate convective region over the tropical Indo-Pacific Ocean under La Niña-like warming SST, the large-scale atmospheric circulation was induced over the WNP, which is unfavorable for tropical disturbance to develop to tropical cyclone only in OND.

목차

1. 서론 1
2. 자료 및 방법론 6
2.1. 관측자료 6
2.2. 모델 구성 및 통계적 분석 방법 9
2.2.1. Linear Baroclinic Model (LBM) 9
2.2.2. Model for Prediction Across Scale – Atmosphere (MPAS-A) 11
2.2.3. 상관 분석 및 통계적 유의성 검정 13
3. 결과 19
3.1. 관측자료에서 나타난 열대저기압 발생 빈도 및 대규모 환경장 변화 19
3.2. LBM : 열대 인도-태평양 강수 변화와 북서태평양 대규모 순환 36
3.3. MPAS-A : 열대 해수면 온도 증가와 rich-get-richer mechanism 39
4. 요약 및 논의 56
참고 문헌 61
Abstract 69

최근 본 자료

전체보기

댓글(0)

0