Impact of cold surges on the Madden-Julian oscillation propagation over the Maritime Continent
Impact of cold surges on the Madden-Julian oscillation propagation over the Maritime Continent
复制标题
冷潮对海洋大陆马登-朱利安振荡传播的影响
DOI：
10.1002/asl.854
复制
发表时间：
2018
影响因子：
3
通讯作者：
Ling Jian
中科院分区：
文献类型：
--
作者：
Pang Bo;Lu Riyu;Ling Jian
马登-朱利安振荡（MJO）是否传播到西太平洋或被海洋大陆（MC）阻挡，可以对全球天气和气候产生重大影响。本研究分别研究了在北半球冬季期间，与MJO事件相关的跨MC传播（MJO‐C）和被MC阻塞（MJO‐B）的对流层外环流。结果表明，MJO-C事件传播经过MC时，在南海和热带西北太平洋地区存在显著的东北风异常。随着西伯利亚高压的加强，MJO-C事件在MC传播期间更有可能伴随着冷涌。这项研究表明，冷涌，这已被记录为热带对流的触发器，可以帮助MJO传播整个MC。
Whether the Madden‐Julian oscillation (MJO) propagates into the western Pacific or is blocked by the Maritime Continent (MC) can have great impacts on global weather and climate. This study investigates the extratropical circulations associated with the MJO events that propagate across the MC (MJO‐C) and those blocked by the MC (MJO‐B), respectively, during the boreal winter. The results show that there are significant northeasterly anomalies over the South China Sea and tropical western North Pacific when MJO‐C events propagate through the MC. The MJO‐C events are much more likely to be accompanied by cold surges during its propagation over the MC, following the intensification of the Siberian High. This study suggests that cold surges, which have been documented as a trigger of tropical convection, can help the MJO propagate across the MC.