Diversity in the quasi‐biweekly oscillation sources of the daily maximum temperature over South China during summer

Abstract The summer daily maximum temperature ( T max ) over South China features obvious quasi‐biweekly oscillation (QBWO) and its QBWO sources mainly include three types. first type is influenced by tropical mid–high‐latitude antiphase coupling QBWO. Successive suppressed enhanced convection, accompanying with anticyclonic cyclonic anomalies, propagate northward from the northwest of Philippines to China. At peak warm phase, an anomalous high dominates causes significant warming. Meanwhile, low associated a southeastward‐propagating wave train occurs north leading abnormal cooling in situ. second originates mid–high latitudes. Before around Ural Mountains triggers two trains propagating southeastward along great circle route eastward westerly jet, respectively, favouring North–Northeast extends southward, causing warming South–Central third in‐phase anomalies are similar but convection centred northeast northwestward. relatively weaker train. highs Tropics latitudes together dominate large meridional scope induce wide‐range eastern Intrinsically, important signals atmospheric variability might be applied forecast .