in this paper, synoptic patterns associated with maximum precipitation over the khorasan region, between 1985-2000 with the computation of some forcing functions are studied and classified into three types. type a: consists of the anticyclones that move from the scandinavian peninsula and central-europe in an east and south-east direction during cold seasons, with relatively high speed and cold...

Abstract The North Pacific storm-track activity is suppressed substantially under the excessively strong westerlies to form a distinct minimum in midwinter, which seems inconsistent with linear baroclinic instability theory. This “midwinter minimum” of has been intensively investigated for decades as test case dynamics. However, mechanisms controlling it are yet be fully unveiled and still deba...

The Loop Current (LC) system dynamics are an essential component of the processes influencing circulation and transport in Gulf Mexico (GoM). LC evolution is influenced by various factors, including rich eddy field region flow exchange through Yucatan Strait with neighboring Caribbean Sea. These factors contribute to complexity and, as a result, limitations predictability system. focus this stu...

Surface winds along the subtropical west coast of South America are characterized by quasi-weekly occurrences low-level jet events. These short lived but intense wind events impact coastal ocean environment. Hence, identifying long-term trends in (CLLJ) is essential for understanding changes marine ecosystems. Here we use ERA5 reanalysis (1979–2019) and an objective algorithm to track anticyclo...

The identification of mesoscale eddies from remote sensing altimetry is often used as a first step for downstream analyses surface or subsurface auxiliary data sets, in so-called composite analysis framework. This framework aims at characterizing the mean perturbations induced by on oceanic variables, merging local anomalies multiple instances according to their relative position eddies. Here, ...

Abstract Atmospheric blocking is a prolific producer of extreme weather with significant socioeconomic impacts. Different physical mechanisms for onset have been proposed and are generally focused on two sectors: the Eurasian North Pacific. Here, we objectively separate into four regions investigate how vary from one region to another, focusing three factors: scale interactions between frequenc...

Abstract Warm conveyor belts (WCBs) associated with extratropical cyclones transport air from the lower troposphere into tropopause region and contribute to upper-level ridge building formation of blocking anticyclones. Recent studies indicate that this constitutes an important source magnifier forecast uncertainty errors in numerical weather prediction (NWP) models. However, a systematic evalu...

The Loop Current (LC) system controls the connectivity between northern Gulf of Mexico (GoM) region and Straits Florida. evolution LC shedding sequence anticyclonic ring (Eddy Franklin) were crucial for fate hydrocarbons released during Deepwater Horizon (DwH) oil spill in 2010. In a previous study, we identified LC-related eddies southern GoM, named “Cuba anticyclones” (“CubANs”). Here, invest...