RISS 학술연구정보서비스

검색
다국어 입력

http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.

변환된 중국어를 복사하여 사용하시면 됩니다.

예시)
  • 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
  • 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
닫기
    인기검색어 순위 펼치기

    RISS 인기검색어

      Contributions of equatorial waves and small-scale convective gravity waves to the 2019/20 QBO disruption

      한글로보기

      https://www.riss.kr/link?id=A107387607

      • 0

        상세조회
      • 0

        다운로드
      서지정보 열기
      • 내보내기
      • 내책장담기
      • 공유하기
      • 오류접수

      부가정보

      다국어 초록 (Multilingual Abstract)

      In January 2020, unexpected easterly winds developed in the westerly quasi-biennial oscillation (QBO) phase. This event corresponds to the second QBO disruption in history, which occurred four years after the first disruption. According to several pre...

      In January 2020, unexpected easterly winds developed in the westerly quasi-biennial oscillation (QBO) phase. This event corresponds to the second QBO disruption in history, which occurred four years after the first disruption. According to several previous studies, strong midlatitude Rossby waves propagating from the Southern Hemisphere (SH) during the austral winter likely initiated the disruption. However, the wave forcing that finally led to the disruption has not been investigated. Here, we examine the role of equatorial waves and small-scale convective gravity waves (CGWs) in the 2019/20 QBO disruption using MERRA-2 global reanalysis data. In June-September 2019, unusually strong Rossby wave forcing originating from the SH decelerated the westerly QBO at 0˚-5˚N at ~50 hPa. In October-November 2019, wave forcing by the vertically (horizontally) propagating Rossby waves and mixed Rossby-gravity (MRG) waves began to increase (decrease). From December 2019, contribution of the MRG wave forcing to the zonal wind deceleration was the largest, followed by the Rossby wave forcing propagating from the Northern Hemisphere and the equatorial troposphere. In January 2020, CGWs provided 11% of the total negative wave forcing at ~43 hPa. Inertia-gravity (IG) waves exhibited a moderate contribution to the negative forcing throughout. Although the zonal-mean precipitation was not significantly larger than the climatology, convectively coupled equatorial waves were increased during the 2019/20 disruption. As in the 2015/16 QBO disruption, increased barotropic instability at the QBO edges generated more MRG waves in the lower stratosphere. In addition, westerly anomalies in the upper troposphere allowed more westward IG waves and CGWs to propagate into the QBO jet.

      더보기

      분석정보

      View

      상세정보조회

      0

      Usage

      원문다운로드

      0

      대출신청

      0

      복사신청

      0

      EDDS신청

      0

      동일 주제 내 활용도 TOP

      더보기

      주제

      연도별 연구동향

      연도별 활용동향

      연관논문

      연구자 네트워크맵

      공동연구자 (7)

      유사연구자 (20) 활용도상위20명

      이 자료와 함께 이용한 RISS 자료

      나만을 위한 추천자료

      해외이동버튼