Simona Andrei - Academia.edu (original) (raw)
Papers by Simona Andrei
By its geographycal position, the south-eastern part of Romania is exposed to several weather haz... more By its geographycal position, the south-eastern part of Romania is exposed to several weather hazards with major impact on the environment. The main goal of this study is to identify the severe weather cases during the winter season using the COST733 Catalogues and COST733class software. The datasets used is based on NCEP-NCAR mean daily re-analysis for sea level pressure, precipitation rate, 2m temperature, 500 hPa geopotential height, 995 hPa u-wind component. The time series covered ten years between 1st of January 2000 and 31st of December 2009. The severity of weather phenomena has been assessed applying some threshold to meteorological parameters. The results have been emphasized the domination of air circulation types associated to ridge of East European Anticyclone and low pressure patterns in south and east part of Romania or over Black Sea.
22nd SGEM International Multidisciplinary Scientific GeoConference Proceedings 2022, Energy and Clean Technologies, VOL 22, ISSUE 4.2
The Remote Sensing department from National Institute of R&D for Optoelectronics INOE, Romania, o... more The Remote Sensing department from National Institute of R&D for Optoelectronics INOE, Romania, operates a complex research infrastructure and has multidisciplinary expertise spanning from laboratory/in-situ chemical analysis to Earth Observation (EO) techniques and applications. Infrastructure and personnel are mostly supported from projects financed by European Commission through FP7/Horizon 2020 (ended programs) and Horizon Europe (current programme) and other international calls (e.g., European Space Agency). In order to facilitate support of R&D projects submission/execution/reporting to Horizon Europe framework program competitions and other international calls, INOE is building a dedicated center until mid-2023, through PREPARE project - -Support Center for European Project Management and European Promotion-, funded under the Competitiveness Operational Program (2014- 2020), the action 1.1.3 "Creating synergies with the RDI actions of the European Union's HORIZON 202...
Remote Sensing, Mar 9, 2023
The general interest in tornado studies has been stimulated by scientific challenges, such as a b... more The general interest in tornado studies has been stimulated by scientific challenges, such as a better understanding of their genesis and development, and by applications and practical issues, such as forecast, building engineering, and risk analysis. This context justifies the interest in reconstructing tornado characteristics based on different approaches. The recently released ERA5 reanalysis data set at 31 km-horizontal resolution, and hourly temporal resolution holds significant potential for many climate applications. In this paper, the tornado environments in Romania between 1981-2020 are reconstructed using a series of thermodynamic and kinematic parameters (e.g., 0-1 km bulk wind shear, 0-6 km bulk wind shear, 0-500m mixed-layer CAPE, ML WMAX*SHEAR) calculated based on ERA5 data. A previous paper on the climatology of tornadoes in Romania showed that in the 1980s there was a minimum in the tornado activity (1 tornado report) followed by a period with a large number of repor...
<p>Understanding the macrophysical and microphysical processes within a convective ... more <p>Understanding the macrophysical and microphysical processes within a convective environment is highly important to strengthen the resilience and adaptation to severe weather. The ACCuReSy project targets a topic a topic under debate within the international scientific community but less tackled in Romania: the aerosol-cloud interactions. By using state-of-the-art remote sensing instruments from new exploratory platforms placed within relevant two locations chosen by their relevance for the environmental factors that meet the conditions for observing convective development either thermal and dynamical, the project aims to perform advanced research on the atmospheric environment before, during and shortly after the convective events and to investigate the aerosol-cloud interactions with special attention on the factors that contribute to the hail formation. Here we present briefly the work performed during the first phase of the project and the future steps in achieving our goals.</p><p><strong>Key words</strong>: aerosol-clouds interactions, cloud macro- and microphysics, convective clouds, severe weather</p><p><strong>Acknowledgment:</strong> <em>This work is funded by a grant of the Ministry of Research, Innovation and Digitization, CCCDI - UEFISCDI, project number PN-III-P2-2.1-PED-2021-1938, ctr. No. 713PED, and partially supported </em><em>by the Romanian National Core Program Contract No.11N/03.01 2023 and by the Romanian Ministry of Research, Innovation and Digitalization, through Program 1- Development of the national research-development system, Subprogram 1.2 - Institutional performance - Projects to finance the excellent RDI, Contract no. 18PFE/30.12.2021</em></p>
EGU General Assembly Conference Abstracts, Apr 1, 2019
Journal of Optoelectronics and Advanced Materials, 2017
Theoretical and Applied Climatology
The changes in the characteristics of heatwaves over Romania have been analyzed using the excess ... more The changes in the characteristics of heatwaves over Romania have been analyzed using the excess heat factor calculated for two climate change scenarios (RCP4.5 and RCP8.5) from the EURO-CORDEX project. The changes were evaluated for the near future (2021–2050) using the historical period (1971–2000) as reference. The frequency of occurrence and the duration of heatwaves is projected to increase for both climate scenarios in particular over southern Romania. In this region, the percentage of change in the near future for the number of heatwaves is between 50 and 60% for the RCP4.5 scenario and 60–80% for the RCP8.5 scenario. Also for the same region, the duration of heatwaves will increase by 30–50% for the RCP4.5 scenario and 60–80% for the RCP8.5 scenario. These results indicate that the human exposure to heatwaves will increase in Romania in the near future. To increase awareness on heatwaves and their impact, we propose a series of immediate actions that include (1) improving th...
Remote Sensing
Lidar measurements of 11 smoke layers recorded at Măgurele, Romania, in 2014, 2016, and 2017 are ... more Lidar measurements of 11 smoke layers recorded at Măgurele, Romania, in 2014, 2016, and 2017 are analyzed in conjunction with the vegetation type of the burned biomass area. For the identified aerosol pollution layers, the mean optical properties and the intensive parameters in the layers are computed. The origination of the smoke is estimated by the means of the HYSPLIT dispersion model, taking into account the location of the fires and the injection height for each fire. Consequently, for each fire location, the associated land cover type is acquired by satellite-derived land cover products. We explore the relationship between the measured intensive parameters of the smoke layers and the respective land cover of the burned area. The vegetation type for the cases we analyzed was either broadleaf crops or grasses/cereals. Overall, the intensive parameters are similar for the two types, which can be associated with the fact that both types belong to the broader group of agricultural ...
Abstract. Blocking climatology over Euro-Atlantic region highlights two favourite action areas: t... more Abstract. Blocking climatology over Euro-Atlantic region highlights two favourite action areas: the main one over East Atlantic-Western Europe sector and a secondary region in the proximity of Ural Mountain. Many studies have shown that over area where it stagnates, atmospheric blocking can induce modifications of thermal and precipitation regime as well as the occurence of climatological extremes. These modifications have direct effects upon the life of the inhabitants. No less important is its influence on weather aspects in adjacent areas. The paper aims to emphasize the correlation between Euro-Atlantic atmospheric blocking and the severe weather phenomena in the Southern Romania, during the cold season. For this purpose, Tibaldi-Molteni blocking index was computed using daily data of 500 hPa geopotential height re-analysis from NCEP/NCAR. For diagnosis of severe weather phenomena were used re-analysis daily data of MSLP, 2 m temperature, precipitation rate and the observational...
Blocking climatology over Euro-Atlantic region highlights two favourite action areas: the main on... more Blocking climatology over Euro-Atlantic region highlights two favourite action areas: the main one over East Atlantic-Western Europe sector and a secondary region in the proximity of Ural Mountain. Many studies have shown that over area where it stagnates, atmospheric blocking can induce modifications of thermal and precipitation regime as well as the occurence of climatological extremes. These modifications have direct effects upon the life of the inhabitants. No less important is its influence on weather aspects in adjacent areas. The paper aims to emphasize the correlation between Euro-Atlantic atmospheric blocking and the severe weather phenomena in the Southern Romania, during the cold season. For this purpose, Tibaldi-Molteni blocking index was computed using daily data of 500 hPa geopotential height re-analysis from NCEP/NCAR. For diagnosis of severe weather phenomena were used re-analysis daily data of MSLP, 2 m temperature, precipitation rate and the observational data from...
Meteorological Applications
International Journal of Climatology
Atmosphere
Significant progress in tornado research and management can be claimed over the last few decades ... more Significant progress in tornado research and management can be claimed over the last few decades worldwide. However, tornado forecasting and warning continue to be permanent challenges for most European national meteorological services because they require particular skills and experience. Moreover, tornado warnings may generate panic. Therefore, one can remark that the main difficulties are related to (1) forecasting the tornado genesis, and (2) finding the most efficient way to communicate to the general public the possibility of tornado occurrence. This article presents the main characteristics of two convective events that occurred in Romania in order to emphasize the similarities and disparities between the tornado event (30 April 2019) and the non-tornado event (6 May 2019), from the warning perspective. Further, we investigate, for the first time in Romania, the general public’s comprehension, risk perception and reactions regarding the tornado events. The survey performed in...
Revista de Chimie
An intensive measurement campaign was performed during September 2014 in southern Romania in two ... more An intensive measurement campaign was performed during September 2014 in southern Romania in two different locations: Magurele, Ilfov County and Turceni, Gorj County. This paper presents one case study with analysis of the aerosol properties from in-situ, passive remote sensing and active remote sensing measurements. A Multiwavelength Raman Lidar (RALI) provided one hour averaged vertical profiles of extinction and backscatter from the 532 nm and 1064 nm channels in Magurele. The UV scanning Lidar (MILI) provided one hour averaged backscattered and extinction vertical profiles for Turceni. Planetary Boundary Layer Height (PBLH) was calculated using the altitude of the maximum negative gradient of the range corrected signal. Mass concentrations for different aerosol species (organics, nitrate, sulphate, ammonium and chloride) were obtained from in-situ measurements using Aerosol Mass Spectrometer located in M�gurele and Aerosol Chemical Speciation Monitor (ACSM) located in Turceni.
EPJ Web of Conferences
The present study is focused on microphysics analysis of different cloud types observed by a mult... more The present study is focused on microphysics analysis of different cloud types observed by a multi-wavelength Raman lidar. Particle's content from a wide variety of cloud types, produced in various atmospheric environments, were investigated using data provided by lidar and validated using ECMWF's ERA Interim reanalysis. The results emphasized the capability of lidar instruments to detect multiple cloud layers, and to discriminate between ice particles and water droplets found within the studied clouds.
EPJ Web of Conferences
This paper presents the results from a coordinated approach for atmospheric investigation, explor... more This paper presents the results from a coordinated approach for atmospheric investigation, exploring synergies between different techniques. A wide range of instruments have been used during an intensive measurement period both from ground (lidar, sunphotometer, aethalometer and Aerosol Chemical Speciation Monitor) and airborne (aerodynamic particle sizer, the Picarro gas analyzer and the NO 2 CAPS analyzer) in 2016 over Magurele, 6 km South West of Bucharest.
EPJ Web of Conferences
This study documents a complex fire event that occurred on October 2016, in Middle East belligere... more This study documents a complex fire event that occurred on October 2016, in Middle East belligerent area. Two fire outbreaks were detected by different spacecraft monitoring instruments on board of TERRA, CALIPSO and AURA Earth Observation missions. Link with local weather conditions was examined using ERA Interim Reanalysis and CAMS datasets. The detection of the event by multiple sensors enabled a detailed characterization of fires and the comparison with different observational data.
By its geographycal position, the south-eastern part of Romania is exposed to several weather haz... more By its geographycal position, the south-eastern part of Romania is exposed to several weather hazards with major impact on the environment. The main goal of this study is to identify the severe weather cases during the winter season using the COST733 Catalogues and COST733class software. The datasets used is based on NCEP-NCAR mean daily re-analysis for sea level pressure, precipitation rate, 2m temperature, 500 hPa geopotential height, 995 hPa u-wind component. The time series covered ten years between 1st of January 2000 and 31st of December 2009. The severity of weather phenomena has been assessed applying some threshold to meteorological parameters. The results have been emphasized the domination of air circulation types associated to ridge of East European Anticyclone and low pressure patterns in south and east part of Romania or over Black Sea.
22nd SGEM International Multidisciplinary Scientific GeoConference Proceedings 2022, Energy and Clean Technologies, VOL 22, ISSUE 4.2
The Remote Sensing department from National Institute of R&D for Optoelectronics INOE, Romania, o... more The Remote Sensing department from National Institute of R&D for Optoelectronics INOE, Romania, operates a complex research infrastructure and has multidisciplinary expertise spanning from laboratory/in-situ chemical analysis to Earth Observation (EO) techniques and applications. Infrastructure and personnel are mostly supported from projects financed by European Commission through FP7/Horizon 2020 (ended programs) and Horizon Europe (current programme) and other international calls (e.g., European Space Agency). In order to facilitate support of R&D projects submission/execution/reporting to Horizon Europe framework program competitions and other international calls, INOE is building a dedicated center until mid-2023, through PREPARE project - -Support Center for European Project Management and European Promotion-, funded under the Competitiveness Operational Program (2014- 2020), the action 1.1.3 "Creating synergies with the RDI actions of the European Union's HORIZON 202...
Remote Sensing, Mar 9, 2023
The general interest in tornado studies has been stimulated by scientific challenges, such as a b... more The general interest in tornado studies has been stimulated by scientific challenges, such as a better understanding of their genesis and development, and by applications and practical issues, such as forecast, building engineering, and risk analysis. This context justifies the interest in reconstructing tornado characteristics based on different approaches. The recently released ERA5 reanalysis data set at 31 km-horizontal resolution, and hourly temporal resolution holds significant potential for many climate applications. In this paper, the tornado environments in Romania between 1981-2020 are reconstructed using a series of thermodynamic and kinematic parameters (e.g., 0-1 km bulk wind shear, 0-6 km bulk wind shear, 0-500m mixed-layer CAPE, ML WMAX*SHEAR) calculated based on ERA5 data. A previous paper on the climatology of tornadoes in Romania showed that in the 1980s there was a minimum in the tornado activity (1 tornado report) followed by a period with a large number of repor...
<p>Understanding the macrophysical and microphysical processes within a convective ... more <p>Understanding the macrophysical and microphysical processes within a convective environment is highly important to strengthen the resilience and adaptation to severe weather. The ACCuReSy project targets a topic a topic under debate within the international scientific community but less tackled in Romania: the aerosol-cloud interactions. By using state-of-the-art remote sensing instruments from new exploratory platforms placed within relevant two locations chosen by their relevance for the environmental factors that meet the conditions for observing convective development either thermal and dynamical, the project aims to perform advanced research on the atmospheric environment before, during and shortly after the convective events and to investigate the aerosol-cloud interactions with special attention on the factors that contribute to the hail formation. Here we present briefly the work performed during the first phase of the project and the future steps in achieving our goals.</p><p><strong>Key words</strong>: aerosol-clouds interactions, cloud macro- and microphysics, convective clouds, severe weather</p><p><strong>Acknowledgment:</strong> <em>This work is funded by a grant of the Ministry of Research, Innovation and Digitization, CCCDI - UEFISCDI, project number PN-III-P2-2.1-PED-2021-1938, ctr. No. 713PED, and partially supported </em><em>by the Romanian National Core Program Contract No.11N/03.01 2023 and by the Romanian Ministry of Research, Innovation and Digitalization, through Program 1- Development of the national research-development system, Subprogram 1.2 - Institutional performance - Projects to finance the excellent RDI, Contract no. 18PFE/30.12.2021</em></p>
EGU General Assembly Conference Abstracts, Apr 1, 2019
Journal of Optoelectronics and Advanced Materials, 2017
Theoretical and Applied Climatology
The changes in the characteristics of heatwaves over Romania have been analyzed using the excess ... more The changes in the characteristics of heatwaves over Romania have been analyzed using the excess heat factor calculated for two climate change scenarios (RCP4.5 and RCP8.5) from the EURO-CORDEX project. The changes were evaluated for the near future (2021–2050) using the historical period (1971–2000) as reference. The frequency of occurrence and the duration of heatwaves is projected to increase for both climate scenarios in particular over southern Romania. In this region, the percentage of change in the near future for the number of heatwaves is between 50 and 60% for the RCP4.5 scenario and 60–80% for the RCP8.5 scenario. Also for the same region, the duration of heatwaves will increase by 30–50% for the RCP4.5 scenario and 60–80% for the RCP8.5 scenario. These results indicate that the human exposure to heatwaves will increase in Romania in the near future. To increase awareness on heatwaves and their impact, we propose a series of immediate actions that include (1) improving th...
Remote Sensing
Lidar measurements of 11 smoke layers recorded at Măgurele, Romania, in 2014, 2016, and 2017 are ... more Lidar measurements of 11 smoke layers recorded at Măgurele, Romania, in 2014, 2016, and 2017 are analyzed in conjunction with the vegetation type of the burned biomass area. For the identified aerosol pollution layers, the mean optical properties and the intensive parameters in the layers are computed. The origination of the smoke is estimated by the means of the HYSPLIT dispersion model, taking into account the location of the fires and the injection height for each fire. Consequently, for each fire location, the associated land cover type is acquired by satellite-derived land cover products. We explore the relationship between the measured intensive parameters of the smoke layers and the respective land cover of the burned area. The vegetation type for the cases we analyzed was either broadleaf crops or grasses/cereals. Overall, the intensive parameters are similar for the two types, which can be associated with the fact that both types belong to the broader group of agricultural ...
Abstract. Blocking climatology over Euro-Atlantic region highlights two favourite action areas: t... more Abstract. Blocking climatology over Euro-Atlantic region highlights two favourite action areas: the main one over East Atlantic-Western Europe sector and a secondary region in the proximity of Ural Mountain. Many studies have shown that over area where it stagnates, atmospheric blocking can induce modifications of thermal and precipitation regime as well as the occurence of climatological extremes. These modifications have direct effects upon the life of the inhabitants. No less important is its influence on weather aspects in adjacent areas. The paper aims to emphasize the correlation between Euro-Atlantic atmospheric blocking and the severe weather phenomena in the Southern Romania, during the cold season. For this purpose, Tibaldi-Molteni blocking index was computed using daily data of 500 hPa geopotential height re-analysis from NCEP/NCAR. For diagnosis of severe weather phenomena were used re-analysis daily data of MSLP, 2 m temperature, precipitation rate and the observational...
Blocking climatology over Euro-Atlantic region highlights two favourite action areas: the main on... more Blocking climatology over Euro-Atlantic region highlights two favourite action areas: the main one over East Atlantic-Western Europe sector and a secondary region in the proximity of Ural Mountain. Many studies have shown that over area where it stagnates, atmospheric blocking can induce modifications of thermal and precipitation regime as well as the occurence of climatological extremes. These modifications have direct effects upon the life of the inhabitants. No less important is its influence on weather aspects in adjacent areas. The paper aims to emphasize the correlation between Euro-Atlantic atmospheric blocking and the severe weather phenomena in the Southern Romania, during the cold season. For this purpose, Tibaldi-Molteni blocking index was computed using daily data of 500 hPa geopotential height re-analysis from NCEP/NCAR. For diagnosis of severe weather phenomena were used re-analysis daily data of MSLP, 2 m temperature, precipitation rate and the observational data from...
Meteorological Applications
International Journal of Climatology
Atmosphere
Significant progress in tornado research and management can be claimed over the last few decades ... more Significant progress in tornado research and management can be claimed over the last few decades worldwide. However, tornado forecasting and warning continue to be permanent challenges for most European national meteorological services because they require particular skills and experience. Moreover, tornado warnings may generate panic. Therefore, one can remark that the main difficulties are related to (1) forecasting the tornado genesis, and (2) finding the most efficient way to communicate to the general public the possibility of tornado occurrence. This article presents the main characteristics of two convective events that occurred in Romania in order to emphasize the similarities and disparities between the tornado event (30 April 2019) and the non-tornado event (6 May 2019), from the warning perspective. Further, we investigate, for the first time in Romania, the general public’s comprehension, risk perception and reactions regarding the tornado events. The survey performed in...
Revista de Chimie
An intensive measurement campaign was performed during September 2014 in southern Romania in two ... more An intensive measurement campaign was performed during September 2014 in southern Romania in two different locations: Magurele, Ilfov County and Turceni, Gorj County. This paper presents one case study with analysis of the aerosol properties from in-situ, passive remote sensing and active remote sensing measurements. A Multiwavelength Raman Lidar (RALI) provided one hour averaged vertical profiles of extinction and backscatter from the 532 nm and 1064 nm channels in Magurele. The UV scanning Lidar (MILI) provided one hour averaged backscattered and extinction vertical profiles for Turceni. Planetary Boundary Layer Height (PBLH) was calculated using the altitude of the maximum negative gradient of the range corrected signal. Mass concentrations for different aerosol species (organics, nitrate, sulphate, ammonium and chloride) were obtained from in-situ measurements using Aerosol Mass Spectrometer located in M�gurele and Aerosol Chemical Speciation Monitor (ACSM) located in Turceni.
EPJ Web of Conferences
The present study is focused on microphysics analysis of different cloud types observed by a mult... more The present study is focused on microphysics analysis of different cloud types observed by a multi-wavelength Raman lidar. Particle's content from a wide variety of cloud types, produced in various atmospheric environments, were investigated using data provided by lidar and validated using ECMWF's ERA Interim reanalysis. The results emphasized the capability of lidar instruments to detect multiple cloud layers, and to discriminate between ice particles and water droplets found within the studied clouds.
EPJ Web of Conferences
This paper presents the results from a coordinated approach for atmospheric investigation, explor... more This paper presents the results from a coordinated approach for atmospheric investigation, exploring synergies between different techniques. A wide range of instruments have been used during an intensive measurement period both from ground (lidar, sunphotometer, aethalometer and Aerosol Chemical Speciation Monitor) and airborne (aerodynamic particle sizer, the Picarro gas analyzer and the NO 2 CAPS analyzer) in 2016 over Magurele, 6 km South West of Bucharest.
EPJ Web of Conferences
This study documents a complex fire event that occurred on October 2016, in Middle East belligere... more This study documents a complex fire event that occurred on October 2016, in Middle East belligerent area. Two fire outbreaks were detected by different spacecraft monitoring instruments on board of TERRA, CALIPSO and AURA Earth Observation missions. Link with local weather conditions was examined using ERA Interim Reanalysis and CAMS datasets. The detection of the event by multiple sensors enabled a detailed characterization of fires and the comparison with different observational data.