A regional climate model RegCM3 with a horizontal spacing of 60 km and18 levels along its vertica... more A regional climate model RegCM3 with a horizontal spacing of 60 km and18 levels along its vertical coordinate is applied for simulation of the climate of the European part of Russia. Continuous integration of the model is performed for the period from January 1982 to December 1994. The simulation results are discussed in comparison with the observations available and results of earlier similar studies. The model successfully describes the climate of the region. The model successfully reproduces interannual variations of temperature and precipitation over the region as well as their standard deviations. Space distribution of summer precipitation is also reasonably simulated. A positive bias in the determination of the near-surface air-temperatures characterizes the modeling results over the northern part of the area during the cool season. Also, a positive air-temperature bias characterizes the results over the southern part of the model domain during summer. Precipitation intensity is underestimated during the cool season and overestimated (20-30%) during summer. A positive bias also characterizes the simulated air temperatures during summer over the southern part of the domain. Also, a positive bias characterizes the simulated temperatures during cool season, especially in the northern part of the domain. The systematic defects detected may result from an insufficiently accurate description of the radiative cooling in the model because of an insufficient space resolution and the size of the domain. Overestimated near-surface air temperatures in summer over the southern part of the domain may be caused by insufficient soil moisture in the model and defects in description of the energy balance.
Main features of composite precipitation and large-scale synoptic patterns over Israel and the ad... more Main features of composite precipitation and large-scale synoptic patterns over Israel and the adjacent areas are analyzed using both the Israel precipitation data and the gridded NCEP/NCAR reanalysis monthly data set from 1958 to 1998. The effect of East Atlantic / West Russian (EA/WR) atmospheric oscillation on precipitation is con- sidered. Results of the analysis revealed a statistically significant relationship between the decadal variations of precipitation in Israel and the EA/WR indices that can be described by linear regressions. The effect of an other main circulation regime, the North Atlantic Oscillation (NAO), has also been investigated. It was found that the precipitation in Israel is determined mainly by the EA/WR regime and to a smaller degree by the NAO regime. The precipitation was most intensive when both the NAO and EA/WR indices were positive. These results can explain the observed decadal variations of the precipitation in Israel by the processes associated wit...
Natalia Fedorova 1 , Simon O. Krichak 2 , Vladimir Levit 3 , Maria Helena de Carvalho 4 ,. ... e ... more Natalia Fedorova 1 , Simon O. Krichak 2 , Vladimir Levit 3 , Maria Helena de Carvalho 4 ,. ... e Lifted Index (LI), e, também, foi calculada a energia potencial de convecção ou energia de instabilidade (CAPE, convective available potential energy) (Djuric, 1995 e Vasquez, 1994). ...
In this study, forecast errors in dust vertical distributions were analyzed. This was carried out... more In this study, forecast errors in dust vertical distributions were analyzed. This was carried out by using quantitative comparisons between dust vertical profiles retrieved from lidar measurements over Rome, Italy, and those predicted by models. Three models were used: the ...
In this study, forecast errors in dust vertical distributions were analyzed. This was carried out... more In this study, forecast errors in dust vertical distributions were analyzed. This was carried out by using quantitative comparisons between dust vertical profiles retrieved from lidar measurements over Rome, Italy, and those predicted by models. Three models were used: the four-particle-size Dust Regional Atmospheric Model (DREAM), the older one-particle-size version of the SKIRON model from the University of Athens (UOA),
A regional climate model RegCM3 with a horizontal spacing of 60 km and18 levels along its vertica... more A regional climate model RegCM3 with a horizontal spacing of 60 km and18 levels along its vertical coordinate is applied for simulation of the climate of the European part of Russia. Continuous integration of the model is performed for the period from January 1982 to December 1994. The simulation results are discussed in comparison with the observations available and results of earlier similar studies. The model successfully describes the climate of the region. The model successfully reproduces interannual variations of temperature and precipitation over the region as well as their standard deviations. Space distribution of summer precipitation is also reasonably simulated. A positive bias in the determination of the near-surface air-temperatures characterizes the modeling results over the northern part of the area during the cool season. Also, a positive air-temperature bias characterizes the results over the southern part of the model domain during summer. Precipitation intensity is underestimated during the cool season and overestimated (20-30%) during summer. A positive bias also characterizes the simulated air temperatures during summer over the southern part of the domain. Also, a positive bias characterizes the simulated temperatures during cool season, especially in the northern part of the domain. The systematic defects detected may result from an insufficiently accurate description of the radiative cooling in the model because of an insufficient space resolution and the size of the domain. Overestimated near-surface air temperatures in summer over the southern part of the domain may be caused by insufficient soil moisture in the model and defects in description of the energy balance.
Main features of composite precipitation and large-scale synoptic patterns over Israel and the ad... more Main features of composite precipitation and large-scale synoptic patterns over Israel and the adjacent areas are analyzed using both the Israel precipitation data and the gridded NCEP/NCAR reanalysis monthly data set from 1958 to 1998. The effect of East Atlantic / West Russian (EA/WR) atmospheric oscillation on precipitation is con- sidered. Results of the analysis revealed a statistically significant relationship between the decadal variations of precipitation in Israel and the EA/WR indices that can be described by linear regressions. The effect of an other main circulation regime, the North Atlantic Oscillation (NAO), has also been investigated. It was found that the precipitation in Israel is determined mainly by the EA/WR regime and to a smaller degree by the NAO regime. The precipitation was most intensive when both the NAO and EA/WR indices were positive. These results can explain the observed decadal variations of the precipitation in Israel by the processes associated wit...
Natalia Fedorova 1 , Simon O. Krichak 2 , Vladimir Levit 3 , Maria Helena de Carvalho 4 ,. ... e ... more Natalia Fedorova 1 , Simon O. Krichak 2 , Vladimir Levit 3 , Maria Helena de Carvalho 4 ,. ... e Lifted Index (LI), e, também, foi calculada a energia potencial de convecção ou energia de instabilidade (CAPE, convective available potential energy) (Djuric, 1995 e Vasquez, 1994). ...
In this study, forecast errors in dust vertical distributions were analyzed. This was carried out... more In this study, forecast errors in dust vertical distributions were analyzed. This was carried out by using quantitative comparisons between dust vertical profiles retrieved from lidar measurements over Rome, Italy, and those predicted by models. Three models were used: the ...
In this study, forecast errors in dust vertical distributions were analyzed. This was carried out... more In this study, forecast errors in dust vertical distributions were analyzed. This was carried out by using quantitative comparisons between dust vertical profiles retrieved from lidar measurements over Rome, Italy, and those predicted by models. Three models were used: the four-particle-size Dust Regional Atmospheric Model (DREAM), the older one-particle-size version of the SKIRON model from the University of Athens (UOA),
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