The occurrence of major avalanche episodes in the Eastern Pyrenees (NE Spain) is estimated by means of the Poisson and the negative binomial distributions, assuming that they are rare events. The differences observed in their spatial distribution along the seven regions in which Eastern Pyrenees have been divided, suggests us to look for spatial variations in the relationship between extreme av...

A HOLOCENE RESEARCH PAPER Abstract: Interannual time-scale associations between fire occurrence and drought indices, the Southern Oscillation, and other synoptic patterns demonstrate that large-scale, long-term atmospheric features are precursors to regional fire activity. However, our knowledge of fire-climate relations over longer (century) timescales is fragmentary because of the rarity of c...

This paper presents a probabilistic model for daily rainfall, using sub-sampling based on meteorological circulation. We classified eight typical but contrasted synoptic situations (weather patterns) for France and surrounding areas, using a “bottom-up” approach, i.e. from the shape of the rain field to the synoptic situations described by geopotential fields. These weather patterns (WP) provid...

This study developed a methodology to temporally classify large scale, upper level atmospheric conditions over North America, utilizing the newly-developed Upper Level Synoptic Index (ULSI). Four meteorological variables: geopotential height, specific humidity, and uand vwind components, at the 500 mb level over North America were obtained from the NCEP/NCAR Reanalysis Project data set for the ...

Indian Ocean is known as a source of moisture for southeast of Iran due to summer precipitation. In this study, in order to investigate the role of SST of Indian Ocean, and the convergence and divergence fields in the precipitation of southeast of Iran, precipitation data of five synoptic stations were used during 2000-2010, including Iranshahr, Khash, ChahBahar, Zabul, and Saravan. To investig...

Abstract We present a climatological study of aerosols in four representative Caribbean Sea islands that is based on daily mean values aerosol optical properties for the period 2008–16, using depth (AOD) and Ångström exponent (AE) to classify dominant type. A assessment spatiotemporal distribution main types, their links with synoptic patterns, transport from different sources provided. Maximum...

Abstract This study identifies diverse synoptic weather patterns of warm-season heavy rainfall events (HREs) in South Korea. The HREs not directly connected to tropical cyclones (TCs) (81.1%) are typically associated with a midlatitude cyclone from eastern China, the expanded North Pacific high, and strong southwesterly moisture transport between. They frequent both first (early summer) second ...