Inicio  /  Atmosphere  /  Vol: 8 Núm: 3 Par: March (2017)  /  Artículo
ARTÍCULO
TITULO

Synoptic Conditions Generating Heat Waves and Warm Spells in Romania

Lucian Sfîca    
Adina-Eliza Croitoru    
Iulian Iordache and Antoniu-Flavius Ciupertea    

Resumen

Heat waves and warm spells are extreme meteorological events that generate a significant number of casualties in temperate regions, as well as outside of temperate regions. For the purpose of this paper, heat waves and warm spells were identified based on daily maximum temperatures recorded at 27 weather stations located in Romania over a 55-year period (1961?2015). The intensity threshold was the 90th percentile, and the length of an event was of minimum three consecutive days. We analyzed 111 heat wave and warm spell events totaling 423 days. The classification of synoptic conditions was based on daily reanalysis at three geopotential levels and on the online version of a backward trajectories model. The main findings are that there are two major types of genetic conditions. These were identified as: (i) radiative heat waves and warm spells (type A) generated by warming the air mass due to high amounts of radiation which was found dominant in warm season; and (ii) advective heat waves and warm spells (type B) generated mainly by warm air mass advection which prevails in winter and transition seasons. These major types consist of two and three sub-types, respectively. The results could become a useful tool for weather forecasters in order to better predict the occurrence of heat waves and warm spells.

 Artículos similares

       
 
Stefano Serafin, Bianca Adler, Joan Cuxart, Stephan F. J. De Wekker, Alexander Gohm, Branko Grisogono, Norbert Kalthoff, Daniel J. Kirshbaum, Mathias W. Rotach, Jürg Schmidli, Ivana Stiperski, ?eljko Vecenaj and Dino Zardi    
The exchange of heat, momentum, and mass in the atmosphere over mountainous terrain is controlled by synoptic-scale dynamics, thermally driven mesoscale circulations, and turbulence. This article reviews the key challenges relevant to the understanding o... ver más
Revista: Atmosphere

 
Yongqiang Liu, Scott Goodrick and Gary Achtemeier    
Weather is an important factor that determines smoke development, which is essential information for planning smoke field measurements. This study identifies the synoptic systems that would favor to produce the desired smoke plumes for the Fire and Smoke... ver más
Revista: Atmosphere

 
Shudao Zhou, Shuling Peng, Min Wang, Ao Shen and Zhanhua Liu    
Unmanned aerial vehicle (UAV) experiments, multiple datasets from ground-based stations and satellite remote sensing platforms, and backward trajectory models were combined to investigate the characteristics and influential mechanisms of the air pollutio... ver más
Revista: Atmosphere

 
Renata Dos Santos Cardoso, Larissa Piffer Dorigon, Danielle Cardozo Frasca Teixeira and Margarete Cristiane de Costa Trindade Amorim    
Urban heat islands (UHIs) in large cities and different climatic regions have been thoroughly studied; however, their effects are becoming a common concern in smaller cities as well. We assessed UHIs in three tropical cities, analyzing how synoptic condi... ver más
Revista: Climate

 
Margarete Cristiane de Costa Trindade Amorim and Vincent Dubreuil    
Nowadays, most of the Earth?s population lives in urban areas. The replacement of vegetation by buildings and the general soil sealing, associated with human activity, lead to a rise in cities temperature, resulting in the formation of urban heat islands... ver más
Revista: Climate