Die Wiederaufnahme der archäologischen Untersuchungen der hallstattzeitlichen Hügelnekropole in B... more Die Wiederaufnahme der archäologischen Untersuchungen der hallstattzeitlichen Hügelnekropole in Bârseşti ermöglicht sowohl die Auswertung der unpublizierten Ausgrabungen als auch die akribische Dokumentation eines Tumulus’. Die Arbeit umreißt den Forschungsstand, beschreibt die Paläogeographie der Region und stellt die zwei Monteoru-Gräber des Keramikstils Ic2 (2000-1750 v. Chr.) dar. Weiterhin wird die Bauart des neu ausgegrabenen Hügelgrabes 32 beschrieben und eine Typologie der Hügelbauarten in Bârseşti durchgeführt. Die C14-Daten dreier hallstattzeitlicher Bestattungen lassen das Ende der Nekropole in der Mitte des 6. Jhs. v. Chr. vermuten. Die anthropologischen Untersuchungen der Leichenbrandreste erwachsene Individuen, die bei einer Temperatur von 800-1000º C verbrannt wurden. Die Einschätzung der verwendeten Energie für die Errichtung des Hügelgrabes 32 weist darauf hin, daß es von einem kleinen Familienverband erbaut worden sein könnte.
15th International Multidisciplinary Scientific GeoConference SGEM2015, WATER RESOURCES. FOREST, MARINE AND OCEAN ECOSYSTEMS, 2011
Large scale convective systems represent in the warm season the main contributors to the water re... more Large scale convective systems represent in the warm season the main contributors to the water resources on the ground, following intense episodes of showers and torrential rains. South-East Europe represents one of the regions with the highest annual spatial frequency of atmospheric lightning at continental level. Atmospheric lightning could be considered the main atmospheric phenomenon triggered by high atmospheric instability. The degree of atmospheric instability is properly assessed using a wide range of indexes. The most reliable source of data for instability indices is derived from the radio sounding observations. In this study, aiming to cover the region of Moldova, we analyzed radiosonde data from Bucharest (Romania) and Odessa (Ukraine). CAPE, SWEAT, LI, KI, TTI were used as instability indices. Lightning data were used from the free database available for contributors to the Blitzortung network observations, developed in the last decennia. In our study each day is ordered taking to account the degree of instability as reflected from the 2 radio sounding stations and for the 5 available indexes. Lightning frequency maps for the territory of Moldova were produced, those being compared to the monthly mean frequency maps which were realized as well. Specific features of the link between instability indices and lightning frequency are underlined. The study points out on the spatial representativity of instability indices derived from radio sounding stations as predictor for the general instability of the region. The results could be used to improve the weather forecast in the warm/convective season.
The present paper analyzes 549 severe weather events reported to the ESWD (European Severe Weathe... more The present paper analyzes 549 severe weather events reported to the ESWD (European Severe Weather Database) that caused large hail in the territory of Romania. Values of atmospheric instability indices have been analyzed for these episodes using data from Bucharest and Budapest sounding stations. For a period of 140 days with episodes of large hail, 24 instability indices were analyzed to describe the atmospheric conditions of the main daily convective activity. The mean values for most indices characterize an unstable atmospheric environment. Of the indices that measure potential instability, VT (vertical totals index) and TT (totals index) had values that described a conductive atmospheric environment for the development of hailstorms. In addition, the interquartile values of LIV (lifted index using virtual temperature) had values lower than zero. For SWEAT (severe weather threat index) and CAPEV (convective available potential energy index using virtual temperature), only the va...
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings, 2016
The user has requested enhancement of the downloaded file. All in-text references underlined in b... more The user has requested enhancement of the downloaded file. All in-text references underlined in blue are added to the original document and are linked to publications on ResearchGate, letting you access and read them immediately.
Present Environment and Sustainable Development, 2014
Temperature inversions represent complex phenomena, specific for depression forms of relief which... more Temperature inversions represent complex phenomena, specific for depression forms of relief which introduce changes in vertical zoning (Apăvăloae, Apostle, Pîrvulescu, 1986 by stable air stratification (Erhan, 1981), because of their morphological features, this is due to the interdependence of general movement and characteristics of the active surface, being the cause of their production (Apăvăloae, et. al., 1984, 1986, 1987). The generation of thermal inversions, their intensity and frequency is a consequence of altitude topography, morphology, fragmentation, orientation and degree of closure to external drives. (Apăvăloae, Apostle, Pîrvulescu, 1988). Thermal inversions represent complex phenomena, specific to depression landforms that introduce changes within the vertical zoning (Apăvăloae, Apostol, Pîrvulescu, 1986) by stable air stratification (Matveev, 1958, Erhan, 1981, Yinghui Liu, 2002) where vertical thermal gradient is negative (Matveev, 1958), due to their morphological ...
IDŐJÁRÁS Quarterly Journal of the Hungarian Meteorological Service , 2021
⎯ The present paper analyzes 549 severe weather events reported to the ESWD (European Severe Weat... more ⎯ The present paper analyzes 549 severe weather events reported to the ESWD (European Severe Weather Database) that caused large hail in the territory of Romania. Values of atmospheric instability indices have been analyzed for these episodes using data from Bucharest and Budapest sounding stations. For a period of 140 days with episodes of large hail, 24 instability indices were analyzed to describe the atmospheric conditions of the main daily convective activity. The mean values for most indices characterize an unstable atmospheric environment. Of the indices that measure potential instability, VT (vertical totals index) and TT (totals index) had values that described a conductive atmospheric environment for the development of hailstorms. In addition, the interquartile values of LIV (lifted index using virtual temperature) had values lower than zero. For SWEAT (severe weather threat index) and CAPEV (convective available potential energy index using virtual temperature), only the values in the 75th percentile describe a very unstable environment (according to the literature). Strong linear correlations were registered between several pairs of indices such as CAPEV-LIV and SWEAT-SI that can be used for the operational forecast of hail.
4th INTERNATIONAL SCIENTIFIC CONFERENCE GEOBALCANICA 2018, 2018
Clearing down the chronology of Holocene’s history vegetation was made by exploring
some importan... more Clearing down the chronology of Holocene’s history vegetation was made by exploring some important sites from Romania. The sequences of the forest phases in Holocene are well known because of the studies made by the School of Palynology from Cluj (Romania). These have shown that past vegetation dynamics are not uniform in the Romanian Carpathians, as initially believed. The Ink quaking bog is situated in the contact area of the Carpathians and the Subcarpathians Curvature’s sector at the altitude of 560 meters. The surrounding vegetation is highlighted by deciduous forest and meadow or swamp vegetation, having mesotrophic and meso-eutrophic characteristics. The peat bog deposit layer is 70-80 cm thick, and it’s represented by a very darkened made of soil peat bog, with some maceration variations. The swamp was dug with a gravity corer, attached with collecting tubes, which allowed a continuous circulation of the inner material column. The samples were collected for the sporopollenin analysis and radiocarbon dating (14C). The material collected from the -65 cm layer, dating from 7861±50 B.P., was placed at the limit between Boreal and Atlantic (Alnus - 27,6%; Ulmus - 16,35%; Tilia - 12.78%; Quercus – 5.45%; Picea - 4.94%; Pinus - 4.1%;). The -55 cm layer, dating from 2986±50 B.P., being on the crossover of Subboreal 2 and Subboreal 3 (Picea - 11.3%; Pinus - 3.91%; Alnus – 37.82%; Ulmus – 9.56%; Tilia - 6.95%). The -35 cm layer, dating from 658±50 B.P., was placed in Subatlantic, were the climate’s cooling and rising humidity determined the beech and fir expansion. Based on Ink quaking bog sporopollenin analysis and 14C dating, we better understand the paleoenvironmental condition around Bîrseşti archaeological site (Late Hallstatt).
Temperature inversions represent complex phenomena, specific for depression forms of relief which... more Temperature inversions represent complex phenomena, specific for depression forms of relief which introduce changes in vertical zoning (Apăvăloae,
The user has requested enhancement of the downloaded file. All in-text references underlined in b... more The user has requested enhancement of the downloaded file. All in-text references underlined in blue are added to the original document and are linked to publications on ResearchGate, letting you access and read them immediately.
Studies to date have shown that in western and southern Iasi county hail events presents the high... more Studies to date have shown that in western and southern Iasi county hail events presents the highest incidence. In these areas are the most important vineyards of the county, some of them internationally renowned (Cotnari, Bucium Copou etc.). In the past five years, the damage caused by storms accompanied by hail in Iasi county exceed 10 million euros. Unit for Combating Hail Moldova 1 Iasi help reduce these losses in Cotnari vineyard region. Since 2014 this unit acts by 5 Local Launching Points and protects 30,000 hectares of farmland. In this paper is presented a study case that points out the hailstorm that took place on the 9 th of July 2012, phenomenon which caused considerable damage to crops and setelments. In the unprotected area , the hailstone reached the size of almost 5 centimeters in diameter and caused damage to a significant area, affecting vineyards and vegetable farming. A detailed analysis of this phenomenon and the damages caused by it demonstrates that the intervention with the anti-hail rockets had an efficiency of over 70% in the protected area.
Die Wiederaufnahme der archäologischen Untersuchungen der hallstattzeitlichen Hügelnekropole in B... more Die Wiederaufnahme der archäologischen Untersuchungen der hallstattzeitlichen Hügelnekropole in Bârseşti ermöglicht sowohl die Auswertung der unpublizierten Ausgrabungen als auch die akribische Dokumentation eines Tumulus’. Die Arbeit umreißt den Forschungsstand, beschreibt die Paläogeographie der Region und stellt die zwei Monteoru-Gräber des Keramikstils Ic2 (2000-1750 v. Chr.) dar. Weiterhin wird die Bauart des neu ausgegrabenen Hügelgrabes 32 beschrieben und eine Typologie der Hügelbauarten in Bârseşti durchgeführt. Die C14-Daten dreier hallstattzeitlicher Bestattungen lassen das Ende der Nekropole in der Mitte des 6. Jhs. v. Chr. vermuten. Die anthropologischen Untersuchungen der Leichenbrandreste erwachsene Individuen, die bei einer Temperatur von 800-1000º C verbrannt wurden. Die Einschätzung der verwendeten Energie für die Errichtung des Hügelgrabes 32 weist darauf hin, daß es von einem kleinen Familienverband erbaut worden sein könnte.
15th International Multidisciplinary Scientific GeoConference SGEM2015, WATER RESOURCES. FOREST, MARINE AND OCEAN ECOSYSTEMS, 2011
Large scale convective systems represent in the warm season the main contributors to the water re... more Large scale convective systems represent in the warm season the main contributors to the water resources on the ground, following intense episodes of showers and torrential rains. South-East Europe represents one of the regions with the highest annual spatial frequency of atmospheric lightning at continental level. Atmospheric lightning could be considered the main atmospheric phenomenon triggered by high atmospheric instability. The degree of atmospheric instability is properly assessed using a wide range of indexes. The most reliable source of data for instability indices is derived from the radio sounding observations. In this study, aiming to cover the region of Moldova, we analyzed radiosonde data from Bucharest (Romania) and Odessa (Ukraine). CAPE, SWEAT, LI, KI, TTI were used as instability indices. Lightning data were used from the free database available for contributors to the Blitzortung network observations, developed in the last decennia. In our study each day is ordered taking to account the degree of instability as reflected from the 2 radio sounding stations and for the 5 available indexes. Lightning frequency maps for the territory of Moldova were produced, those being compared to the monthly mean frequency maps which were realized as well. Specific features of the link between instability indices and lightning frequency are underlined. The study points out on the spatial representativity of instability indices derived from radio sounding stations as predictor for the general instability of the region. The results could be used to improve the weather forecast in the warm/convective season.
The present paper analyzes 549 severe weather events reported to the ESWD (European Severe Weathe... more The present paper analyzes 549 severe weather events reported to the ESWD (European Severe Weather Database) that caused large hail in the territory of Romania. Values of atmospheric instability indices have been analyzed for these episodes using data from Bucharest and Budapest sounding stations. For a period of 140 days with episodes of large hail, 24 instability indices were analyzed to describe the atmospheric conditions of the main daily convective activity. The mean values for most indices characterize an unstable atmospheric environment. Of the indices that measure potential instability, VT (vertical totals index) and TT (totals index) had values that described a conductive atmospheric environment for the development of hailstorms. In addition, the interquartile values of LIV (lifted index using virtual temperature) had values lower than zero. For SWEAT (severe weather threat index) and CAPEV (convective available potential energy index using virtual temperature), only the va...
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings, 2016
The user has requested enhancement of the downloaded file. All in-text references underlined in b... more The user has requested enhancement of the downloaded file. All in-text references underlined in blue are added to the original document and are linked to publications on ResearchGate, letting you access and read them immediately.
Present Environment and Sustainable Development, 2014
Temperature inversions represent complex phenomena, specific for depression forms of relief which... more Temperature inversions represent complex phenomena, specific for depression forms of relief which introduce changes in vertical zoning (Apăvăloae, Apostle, Pîrvulescu, 1986 by stable air stratification (Erhan, 1981), because of their morphological features, this is due to the interdependence of general movement and characteristics of the active surface, being the cause of their production (Apăvăloae, et. al., 1984, 1986, 1987). The generation of thermal inversions, their intensity and frequency is a consequence of altitude topography, morphology, fragmentation, orientation and degree of closure to external drives. (Apăvăloae, Apostle, Pîrvulescu, 1988). Thermal inversions represent complex phenomena, specific to depression landforms that introduce changes within the vertical zoning (Apăvăloae, Apostol, Pîrvulescu, 1986) by stable air stratification (Matveev, 1958, Erhan, 1981, Yinghui Liu, 2002) where vertical thermal gradient is negative (Matveev, 1958), due to their morphological ...
IDŐJÁRÁS Quarterly Journal of the Hungarian Meteorological Service , 2021
⎯ The present paper analyzes 549 severe weather events reported to the ESWD (European Severe Weat... more ⎯ The present paper analyzes 549 severe weather events reported to the ESWD (European Severe Weather Database) that caused large hail in the territory of Romania. Values of atmospheric instability indices have been analyzed for these episodes using data from Bucharest and Budapest sounding stations. For a period of 140 days with episodes of large hail, 24 instability indices were analyzed to describe the atmospheric conditions of the main daily convective activity. The mean values for most indices characterize an unstable atmospheric environment. Of the indices that measure potential instability, VT (vertical totals index) and TT (totals index) had values that described a conductive atmospheric environment for the development of hailstorms. In addition, the interquartile values of LIV (lifted index using virtual temperature) had values lower than zero. For SWEAT (severe weather threat index) and CAPEV (convective available potential energy index using virtual temperature), only the values in the 75th percentile describe a very unstable environment (according to the literature). Strong linear correlations were registered between several pairs of indices such as CAPEV-LIV and SWEAT-SI that can be used for the operational forecast of hail.
4th INTERNATIONAL SCIENTIFIC CONFERENCE GEOBALCANICA 2018, 2018
Clearing down the chronology of Holocene’s history vegetation was made by exploring
some importan... more Clearing down the chronology of Holocene’s history vegetation was made by exploring some important sites from Romania. The sequences of the forest phases in Holocene are well known because of the studies made by the School of Palynology from Cluj (Romania). These have shown that past vegetation dynamics are not uniform in the Romanian Carpathians, as initially believed. The Ink quaking bog is situated in the contact area of the Carpathians and the Subcarpathians Curvature’s sector at the altitude of 560 meters. The surrounding vegetation is highlighted by deciduous forest and meadow or swamp vegetation, having mesotrophic and meso-eutrophic characteristics. The peat bog deposit layer is 70-80 cm thick, and it’s represented by a very darkened made of soil peat bog, with some maceration variations. The swamp was dug with a gravity corer, attached with collecting tubes, which allowed a continuous circulation of the inner material column. The samples were collected for the sporopollenin analysis and radiocarbon dating (14C). The material collected from the -65 cm layer, dating from 7861±50 B.P., was placed at the limit between Boreal and Atlantic (Alnus - 27,6%; Ulmus - 16,35%; Tilia - 12.78%; Quercus – 5.45%; Picea - 4.94%; Pinus - 4.1%;). The -55 cm layer, dating from 2986±50 B.P., being on the crossover of Subboreal 2 and Subboreal 3 (Picea - 11.3%; Pinus - 3.91%; Alnus – 37.82%; Ulmus – 9.56%; Tilia - 6.95%). The -35 cm layer, dating from 658±50 B.P., was placed in Subatlantic, were the climate’s cooling and rising humidity determined the beech and fir expansion. Based on Ink quaking bog sporopollenin analysis and 14C dating, we better understand the paleoenvironmental condition around Bîrseşti archaeological site (Late Hallstatt).
Temperature inversions represent complex phenomena, specific for depression forms of relief which... more Temperature inversions represent complex phenomena, specific for depression forms of relief which introduce changes in vertical zoning (Apăvăloae,
The user has requested enhancement of the downloaded file. All in-text references underlined in b... more The user has requested enhancement of the downloaded file. All in-text references underlined in blue are added to the original document and are linked to publications on ResearchGate, letting you access and read them immediately.
Studies to date have shown that in western and southern Iasi county hail events presents the high... more Studies to date have shown that in western and southern Iasi county hail events presents the highest incidence. In these areas are the most important vineyards of the county, some of them internationally renowned (Cotnari, Bucium Copou etc.). In the past five years, the damage caused by storms accompanied by hail in Iasi county exceed 10 million euros. Unit for Combating Hail Moldova 1 Iasi help reduce these losses in Cotnari vineyard region. Since 2014 this unit acts by 5 Local Launching Points and protects 30,000 hectares of farmland. In this paper is presented a study case that points out the hailstorm that took place on the 9 th of July 2012, phenomenon which caused considerable damage to crops and setelments. In the unprotected area , the hailstone reached the size of almost 5 centimeters in diameter and caused damage to a significant area, affecting vineyards and vegetable farming. A detailed analysis of this phenomenon and the damages caused by it demonstrates that the intervention with the anti-hail rockets had an efficiency of over 70% in the protected area.
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Papers by Istrate Vasilică
some important sites from Romania. The sequences of the forest phases in Holocene are
well known because of the studies made by the School of Palynology from Cluj
(Romania). These have shown that past vegetation dynamics are not uniform in the
Romanian Carpathians, as initially believed. The Ink quaking bog is situated in the contact
area of the Carpathians and the Subcarpathians Curvature’s sector at the altitude of 560
meters. The surrounding vegetation is highlighted by deciduous forest and meadow or
swamp vegetation, having mesotrophic and meso-eutrophic characteristics. The peat bog
deposit layer is 70-80 cm thick, and it’s represented by a very darkened made of soil peat
bog, with some maceration variations. The swamp was dug with a gravity corer, attached
with collecting tubes, which allowed a continuous circulation of the inner material
column. The samples were collected for the sporopollenin analysis and radiocarbon
dating (14C). The material collected from the -65 cm layer, dating from 7861±50 B.P.,
was placed at the limit between Boreal and Atlantic (Alnus - 27,6%; Ulmus - 16,35%;
Tilia - 12.78%; Quercus – 5.45%; Picea - 4.94%; Pinus - 4.1%;). The -55 cm layer, dating
from 2986±50 B.P., being on the crossover of Subboreal 2 and Subboreal 3 (Picea -
11.3%; Pinus - 3.91%; Alnus – 37.82%; Ulmus – 9.56%; Tilia - 6.95%). The -35 cm layer,
dating from 658±50 B.P., was placed in Subatlantic, were the climate’s cooling and rising
humidity determined the beech and fir expansion. Based on Ink quaking bog
sporopollenin analysis and 14C dating, we better understand the paleoenvironmental
condition around Bîrseşti archaeological site (Late Hallstatt).
some important sites from Romania. The sequences of the forest phases in Holocene are
well known because of the studies made by the School of Palynology from Cluj
(Romania). These have shown that past vegetation dynamics are not uniform in the
Romanian Carpathians, as initially believed. The Ink quaking bog is situated in the contact
area of the Carpathians and the Subcarpathians Curvature’s sector at the altitude of 560
meters. The surrounding vegetation is highlighted by deciduous forest and meadow or
swamp vegetation, having mesotrophic and meso-eutrophic characteristics. The peat bog
deposit layer is 70-80 cm thick, and it’s represented by a very darkened made of soil peat
bog, with some maceration variations. The swamp was dug with a gravity corer, attached
with collecting tubes, which allowed a continuous circulation of the inner material
column. The samples were collected for the sporopollenin analysis and radiocarbon
dating (14C). The material collected from the -65 cm layer, dating from 7861±50 B.P.,
was placed at the limit between Boreal and Atlantic (Alnus - 27,6%; Ulmus - 16,35%;
Tilia - 12.78%; Quercus – 5.45%; Picea - 4.94%; Pinus - 4.1%;). The -55 cm layer, dating
from 2986±50 B.P., being on the crossover of Subboreal 2 and Subboreal 3 (Picea -
11.3%; Pinus - 3.91%; Alnus – 37.82%; Ulmus – 9.56%; Tilia - 6.95%). The -35 cm layer,
dating from 658±50 B.P., was placed in Subatlantic, were the climate’s cooling and rising
humidity determined the beech and fir expansion. Based on Ink quaking bog
sporopollenin analysis and 14C dating, we better understand the paleoenvironmental
condition around Bîrseşti archaeological site (Late Hallstatt).