Atmospheric drought in lowlands in Slovakia is analyzed on the bases of Standardised Precipitation Index (SPI) and Standardised Precipitation Evapotranspiration Index (SPEI). This paper gives information about the dynamic, intensity, seasonal and territorial differences in occurrence of drought with various intensity: mild (near to normal), moderate, severe and extreme for the period 1961–2011....

We present the new scavenging scheme SCAV, simulating the removal of trace gases and aerosol particles by clouds and precipitation in global atmospheric chemistry models. The scheme is quite flexible and can be used for various purposes, e.g. long term chemistry simulations as well as detailed cloud and precipitation chemistry calculations. The presence of clouds can substantially change the ch...

It was once generally thought that stratiform precipitation was something occurring primarily, if not exclusively, in middle latitudes—in baroclinic cyclones and fronts. Early radar observations in the Tropics, however, showed large radar echoes composed of convective rain alongside stratiform precipitation, with the stratiform echoes covering great areas and accounting for a large portion of t...

The relationship between monthly midtropospheric circulation variations, occurring in the North American sector, and surface temperature and precipitation across the Great Plains is evaluated for the middle month of each season (January, April, July, and October). The results demonstrate that monthly Great Plains temperature variability is strongly associated with the majorpattems of midtroposp...

precipitation is one of important parameters of climatology and atmospheric science that have more importance in human life. recently, extensive flood and drought entered many damage to most parts of the world. precipitation forecasting and alerts management role is responsible for these problems. today, artificial neural networks are one of developed method that applied for estimate and predic...

The variation of precipitation plays an important role in the eco-hydrological processes and water resources regimes on the Tibetan Plateau (TP). Based on the monthly mean precipitation data of 65 meteorological stations over the TP and surrounding areas from 1961 to 2015, variations, trends and temporal–spatial distribution of precipitation have been studied; furthermore, the possible reasons ...

[1] The most important sources of atmospheric moisture at the global scale are herein identified, both oceanic and terrestrial, and a characterization is made of how continental regions are influenced by water from different moisture source regions. The methods used to establish source-sink relationships of atmospheric water vapor are reviewed, and the advantages and caveats associated with eac...

Atmospheric circulation in the oceans surrounding southern Africa plays an important role in determining its precipitation. This study uses wind information recorded in ships’ logbooks in order to statistically reconstruct summer and winter season precipitation at four southern African weather stations from 1796-1854. The reconstruction was obtained by first relating gridded 8° x 8° NCEP-DOE re...

Accurate representation of the spatial and temporal distribution of water vapour in the atmosphere represents a significant challenge in current meteorological practice. The quality of quantitative precipitation forecasting and of model representation of hydrologic processes is clearly dependent on accurate initialisation of the atmospheric moisture distribution. Atmospheric water vapour is oft...

A dual-polarization radar hydrometeor classification algorithm for winter precipitation 1 2 Elizabeth J. Thompson, Steven A. Rutledge, Brenda Dolan, V. Chandrasekar, and Boon 3 Leng Cheong 4 5 1. Department of Atmospheric Science, Colorado State University, Fort Collins, CO 6 2. Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, 7 CO 8 3. Atmospheric Rad...