http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Sherly Shelton (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
Sherly Shelton,Faustin Katchele Ogou,Buddhi Pushpawela 한국기상학회 2022 Asia-Pacific Journal of Atmospheric Sciences Vol.58 No.1
Drought management in Sri Lanka is mostly limited to relief provision due to the shortage of scientific details to develop sufficient drought risk management. Therefore, spatio-temporal variability of droughts in two cropping seasons, Yala (May– August) and Maha (October–March) in Sri Lanka, have been investigated using the Standardized Precipitation Evapotranspiration Index (SPEI). The SPEI-4 at August (SPEI-4August) shows an apparent decadal variation over wet, intermediate, and dry climate regions in the country, which is coherent with the decadal shift of rainfall in 1999. For the Yala season, the number of drought events (SPEI-4August < −1) in the late period (2000–2015) is higher than that in the early period (1985–1999). On the other hand, the decadal variation of SPEI-6March is not distinguished; however, the number of drought events (SPEI- 6March < −1) in all climate regions is less after 2003 as compared to the early period. The principle component time series of SPEI- 4August and rainfall in Yala seasons (r = 0.93) have closely associated, which implies that rainfall received in the Yala season can ascribe the observed decadal variation in SPEI-4August. In the Yala season, less moisture transport towards Sri Lanka is observed in the late period due to the weakening of 850 hPa wind circulation and increasing of 500 hPa geopotential height, which causes more moisture divergence and ultimately affects the decreasing rainfall over the country. Meanwhile, the observed rainfall variability in cropping seasons, especially in the Yala season, is characterized by the large-scale circulation at interannual (Nino3.4) to decadal-scale (Pacific Decadal Oscillation (PDO), and North Atlantic Oscillation (NAO).
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
