Marine Heatwaves (MHW) and Cold Spells (MCS) in the Mediterranean Sea have been extracted from an SST dataset from which the annual warming trend had been removed. The number of events per year (max 6) and their intensity resulted stable, indicating that the increasing occurrence of actual MHW in the last decades is mainly due to the warming rate. The extent (daily mean around 10% of the basin surface) and duration of events (around 36 days per year) decreased at a rate of −15% and −13% per decade, respectively. The decrease, concentrated in summer for MCS and in winter for MHW, explains the difference between the summer and winter warming rates of the basin. The decrease of summer MCS and winter MHW is probably caused by the shorter duration of extreme atmospheric events.

地中海的海洋热浪 (MHW) 和寒潮 (MCS) 是从 SST 数据集中提取的，该数据集中已消除了年度变暖趋势。每年的事件数量（最多 6 个）及其强度稳定，表明过去几十年实际 MHW 发生率的增加主要是由于升温速率。事件的范围（每天平均约 10% 的盆地表面）和事件持续时间（每年约 36 天）分别以每十年 -15% 和 -13% 的速度下降。这种减少主要集中在 MCS 的夏季和 MHW 的冬季，解释了流域夏季和冬季升温速率之间的差异。夏季 MCS 和冬季 MHW 的减少可能是由于极端大气事件持续时间较短所致。