in order to recognize isfahan weather types, in this research 22 variables including temperature, precipitation, atmospheric humidity and wind were studied in isfahan synoptic station from dey,11th,1339(january,1st,1960) to dey,11th,1383 (december,31st,2004). a cluster analysis on the euclidean distance of standardized matrix of data and linking days on the basis of ward method showed that isfa...

Recent evidence suggests that changes in atmospheric circulation have altered the probability of extreme climate events in the Northern Hemisphere. We investigate northeastern Pacific atmospheric circulation patterns that have historically (1949-2015) been associated with cool-season (October-May) precipitation and temperature extremes in California. We identify changes in occurrence of atmosph...

BACKGROUND In recent years the developing world, much of which is located in the tropical countries, has seen dramatic growth of its urban population associated with serious degradation of environmental quality. Climate change is producing major impacts including increasing temperatures in these countries that are considered to be most vulnerable to the impact of climate change due to inadequat...

Summer (June–August, JJA) 2012 was anomalously wet in northern Europe, and anomalously dry in southern Europe. Characterised by a strong negative summer North Atlantic Oscillation (SNAO) pattern, there was a southward and eastward displacement of the jet over Europe, with most storms tracking along the northern flank and across the British Isles (Dong et al. 2013). The wet northern European sum...

Seasonal changes in the climatic potential for very large wildfires (VLWF≥ 50,000 ac~20,234 ha) across the western contiguous United States are projected over the 21st century using generalized linear models and downscaled climate projections for two representative concentration pathways (RCPs). Significant (p≤0.05) increases in VLWF probability for climate of the mid-21st century (2031–2060) r...