热带气象学报2016，Vol.32Issue(6)：841-854,14.DOI:10.16032/j.issn.1004-4965.2016.06.006
2000-2001年北半球冬季一次继发性MJO和一次原发性MJO事件发生的物理机制
INITIATION MECHANISMS FOR A SUCCESSIVE MJO EVENT AND A PRIMARY MJO EVENT DURING BOREAL WINTER OF 2000-2001
摘要
Abstract
Observed outgoing longwave radiation (OLR) and ERA-Interim reanalysis data were analyzed to reveal the initiation processes associated with a successive and a primary MJO event during 2000-2001.It was found that the initiation of the successive event was caused by anomalous ascending motion induced by low-level horizontal temperature advection.The anomalous ascending motion,together with horizontal moisture advection,moistened lower troposphere and led to an unstable stratification and triggered convection.The initiation of the primary MJO event,on the other hand,was caused by the accumulation of anomalous moisture associated with three low-frequency modes,a convectively coupled Kelvin wave (CCKW),an westward-propagating equatorial Rossby wave (ER) and a weak planetary-scale MJO mode.It is the merging of the low-level specific humidity anomalies of the three modes that led to the rapid setup of large-scale convectively unstable stratification and favored the development of the eastward-propagating planetary-scale MJO mode.关键词
对流的发生/继发性MJO/原发性MJOKey words
convection initiation/successive MJO/primary MJO分类
天文与地球科学引用本文复制引用
冯婧,李天明..2000-2001年北半球冬季一次继发性MJO和一次原发性MJO事件发生的物理机制[J].热带气象学报,2016,32(6):841-854,14.基金项目
China National 973 project (2015CB453200) （2015CB453200）
China National project (41575070) （41575070）
NSFC (41475084) （41475084）
OLR (N00014-16-12260) （N00014-16-12260）
NRL (N00173-13-1-G902) （N00173-13-1-G902）
Jiangsu NSF Key Project (BK20150062) （BK20150062）
Jiangsu Shuang-Chuang Team (R2014SCT001) （R2014SCT001）
Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) （PAPD）
China Special Fund for Meteorological Research in the Public Interest (GYHY201306028) （GYHY201306028）
Colleges and Universities in Jiangsu Province Plans to Graduate Research and Innovation (CXLX13_486) （CXLX13_486）
