Regional Forecast Center Bacau

Cuza Vodă, Romania

Regional Forecast Center Bacau

Cuza Vodă, Romania
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Cazacu M.M.,Al. I. Cuza University | Cazacu M.M.,Technical University Gheorghe Asachi | Tudose O.,Al. I. Cuza University | Tudose O.,Science INOESY SRL | And 6 more authors.
Romanian Reports in Physics | Year: 2017

Natural (volcanic activity, desert dust storms) and anthropogenic (fuel combustion, biomass burning etc.) aerosols play an important role in climate changes, as they influence the solar radiation balance on Earth through light scattering and absorption processes. Additionally, both natural (e.g. Saharan dust) and anthropogenic (urban –traffic/industrial from big agglomerations aerosols) are acting as a trigger of the regional meteorology and weather forecast. This paper summarizes the temporal and vertical variation of mixed aerosol mass concentration near Bucharest, based on experimental data collected in the 2012 EMEP/PEGASOS campaign. From the series of experimental data collected we emphasize two cases, one for large biomass burning and one for a typical Saharan storm reaching the outskirts of Bucharest. The vertical mass concentrations profiles were determined based on the measurements performed with a multi wavelength depolarization Raman lidar. To assess the aerosol mass concentration using these lidar data, the authors are using the method proposed by Tesche et al., combined with forward simulations (i.e. OPAC). The results may contribute to describe, in an improved manner, the contribution of the mixed aerosols (low- or/and high-depolarizing particles) in the atmospheric simulations and models. It can also be used for operational purposes, such as near real time assessment of aerosol load (e.g. volcanic ash). © 2017, Editura Academiei Romane. All rights reserved.


Cazacu M.M.,Al. I. Cuza University | Cazacu M.M.,Technical University Gheorghe Asachi | Tudose O.G.,Al. I. Cuza University | Tudose O.G.,Science INOESY SRL | And 6 more authors.
Applied Ecology and Environmental Research | Year: 2016

In this paper a local-scale study of Saharan dust loading over Iasi city, Romania, during July 2012 is reported. The intrusion of Saharan dust above the monitoring site [Iasi_LOASL, Romania (47.19N, 27.55E)] and the variations of ozone and NO2 concentrations are estimated by using advanced remote sensing techniques (i.e. Aerosol Robotic NETwork – AERONET, Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations – CALIPSO) and forecast models (i.e. DREAM and MAP 3D). The time interval was appropriately selected, to remove the influence of precipitation and clouds on photochemical processes. During intrusion events, the Saharan dust represents the main source for changes in optical and chemical parameters of the atmosphere. © 2016, ALÖKI Kft., Budapest, Hungary.


Timofte A.,Al. I. Cuza University | Timofte A.,Regional Forecast Center Bacau | Belegantec L.,Romanian National Institute for Optoelectronics | Cazacu M.M.,Al. I. Cuza University | And 4 more authors.
Journal of Optoelectronics and Advanced Materials | Year: 2015

The time evolution of the Planetary Boundary Layer (PBL) height has a significant impact on weather events and air quality since it is one of the parameters affecting the atmospheric state. This paper presents results concerning the PBL height retrieval using several techniques and assessment methods. The studies are focused on remote sensing methods, radiosoundings and numerical models. The PBL height behaviour has been studied in two sites by means of vertical humidity, temperature profiles and range corrected lidar signal. A good correlation between lidar, microwave radiometry and radio sounding profiles has been evidenced for the analyzed period. PBL height estimation performed by ALARO has a permanent offset with respect to the other methods during the cold season.


Cazacu M.M.,Al. I. Cuza University | Cazacu M.M.,Technical University Gheorghe Asachi | Timofte A.,Al. I. Cuza University | Timofte A.,Regional Forecast Center Bacau | And 4 more authors.
Journal of Quantitative Spectroscopy and Radiative Transfer | Year: 2015

In order to analyze the troposphere dynamics under particular conditions in North-East region of Romania, various types of aerosols chemical compositions have been studied using complementary techniques. Thus, the seasonal trends of aerosols and its external influences have been studied using aerosol optical properties retrieved from Aerosol Robotic Network (AERONET). Complementary studies were taken into account by using several meteorological factors, computational models and meteorological data. Moreover, this paper presents optical properties analysis of different types of aerosols and the seasonal variability of them in one year of measurements. The major categories of aerosol types are evidenced, such as urban/industrial aerosol, biomass burning and mineral dust. © 2014 Elsevier Ltd.


Unga F.,Al. I. Cuza University | Cazacu M.M.,Al. I. Cuza University | Timofte A.,Al. I. Cuza University | Timofte A.,Regional Forecast Center Bacau | And 6 more authors.
Environmental Engineering and Management Journal | Year: 2013

This research has been performed during summer time at Iasi Atmosphere Optics, Spectroscopy and Lasers Laboratory site (LOA-SL), aerosol monitoring station (47.19N, 27.55E). In order to properly identify and characterize the aerosol types, Aerosol Robotic Network (AERONET) data and sun-photometer measurements were analysed using parameters such as: optical thickness, spectral dependence of Ångström exponent (α), spectral dependence of Single Scattering Albedo and the dominating size mode. Several cases to highlight the presence of Saharan dust and biomass were presented, too. An event on the 6th of July, 2012 shows that the LIDAR ratios are between 60~70 sr, with an Ångström exponent between 1.5~1.8 for urban/industrial aerosol and a LIDAR ratios between 40~50 sr with an Ångström exponent between 1.7~1.9 for biomass burning. A major presence of urban / industrial dust was evidenced here.


Bostan D.C.,Regional Forecast Center Bacau | Bostan D.C.,University of Bucharest | Timofte A.,Regional Forecast Center Bacau | Timofte A.,Al. I. Cuza University | Leontie L.,Al. I. Cuza University
Journal of Environmental Protection and Ecology | Year: 2011

The ambient temperature and relative humidity strongly affect the evaporation rate of perspiration and therefore the cooling rate of the human body. The human thermal comfort is a complex concept, because it depends on a number of physical parameters, both organic and external. In this work, we report some recently performed measurements of the temperature-humidity index in the Moldavia region, in connection with the meteorological conditions and topographic factors.


Cazacu M.M.,Al. I. Cuza University | Timofte A.,Al. I. Cuza University | Timofte A.,Regional Forecast Center Bacau | Talianu C.,Romanian National Institute for Optoelectronics | And 5 more authors.
Journal of Optoelectronics and Advanced Materials | Year: 2012

The volcanic ash (from Grímsvötn volcano South - Eastern Iceland) cloud dispersion over Iasi county (North-Eastern Romania) and its vertical distribution have been analyzed during the 21st and 28th of May 2011. Because of numerous air pollutants with variable concentrations size and chemical compositions depending not only on space and time but also on meteorological data satellite data and forecasting models must be taken into account. The monitoring of the air pollutants is performed using the new 3D Atmospheric Observatory of the "Alexandru Ioan Cuza" University of Iasi part of national LIDAR system network implemented within ROLINET (ROmanian LIdar NETwork) and RADO (Romanian Atmospheric 3D Observatory) projects.


Timofte A.,Al. I. Cuza University | Timofte A.,Regional Forecast Center Bacau | Cazacu M.M.,Al. I. Cuza University | Radulescu R.,Romanian National Institute for Optoelectronics | And 3 more authors.
Environmental Engineering and Management Journal | Year: 2011

The eruption of the Eyjafjallajokull volcano and its impact on the environment in Romania has been studied by means of different complementary tools. In order to characterize both various types of clouds, theirs dynamics, and the ash sulphates aerosols, different diagnosis type instruments have been deeply analyzed, too. Thus, the occurrence of the ash cloud over Romania, Bucharest city (lat: 44.4 N, long: 26.0 E), starting on the 17th of April 2010 when it covered this area, and also the weather conditions have been investigated. The HYSPLIT (Hybrid Single Particle Lagr angian Integrated Trajectory) model, ECMWF (European Centre for Medium-Range Weather Forecasts) and satellite data were used as a complementary tool for the LIDAR measurement data.


Cazacu M.M.,Al. I. Cuza University | Timofte A.,Al. I. Cuza University | Timofte A.,Regional Forecast Center Bacau | Balin I.,EnviroScopY SA | And 2 more authors.
Environmental Engineering and Management Journal | Year: 2011

In order to analyze the dynamics of the air pollutants, both through experiments and new modeling-forecasted environmental software (MAP 3D), preliminary investigations have been initiated. Complementary studies such as meteorological data that influence the physico-chemistry processes of various atmospheric trace constituents at the ground level have been taking into account, too.


Tudose O.-G.,Al. I. Cuza University | Tudose O.-G.,EnviroScopY Ltd. | Cazacu M.-M.,Al. I. Cuza University | Cazacu M.-M.,EnviroScopY Ltd. | And 3 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2011

Aiming the remote sensing low cost, up-gradable and modular tools development for monitoring relevant atmospheric parameters and processes in the whole troposphere (from 250 m to 12-15 Km altitude), a new configuration LIDAR system, i.e. ESYROLIDAR, dedicated for tropospheric aerosols and clouds high temporal (minutes) and spatial resolutions (meters) monitoring have been developed and tested. This extremely up-gradable configuration of ESYROLIDAR is based on: a multi -wavelengths (1064, 532 and 355 nm) powerful (200, 100 and 45 mJ/pulse) and relatively high variable repetition rate (up to 30 Hz) Nd:YAG pulsed laser, a large Newtonian telescope (40 cm diameter of collector mirror) and a new opto-mechanics detection module built in an original "eye geometry" consideration. The firsts tests and measurements were performed at the site of Science and Technology Park TehnopolIS (Iasi city located on the northeastern region of Romania), using a basic configuration with a 532 nm elastic detection with depolarization study module. Different types of clouds up to 12 km in daylight are highlighted from this first measurement. Measurements and tests made in other recent campaigns for 355 nm elastic channel are also presented. The ability of the new LIDAR system to determine the height of planetary boundary layer (PBL) determined from the LIDAR signals, as well as the aerosols load and optical parameters (extinction and backscatter) and the evaluation of atmospheric dynamics at high spatial-temporal resolutions are clearly confirmed. This paper presents the ESYROLIDAR basic configuration with its two VIS elastic channels (532 nm, parallel and cross). The first measurements made with the UV (355 nm - interchangeable channel) and VIS (532 nm) elastic channels are illustrated by typical examples. The quality of ESYROLIDAR atmospheric profiles is based on advantages of low divergence (0.15 mrad), relatively high repetition rate (30 Hz) and the coaxial UV-VIS-NIR. The present challenges are first a new robust more automatized alignment system and second the integration of more Raman detection channels i.e. Raman H 2O water vapor at 407 nm. This system is the base of the ROmanian LIdar NETwork (ROLINET). © 2011 SPIE.

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