TY  - JOUR
AU  - Keresztesi, Ágnes
AU  - Ion-Andrei, Nita
AU  - Marius-Victor, Birsan
AU  - Bodor, Zsolt
AU  - Pernyeszi, Tímea Judit
AU  - Miruna, Mihaela Micheu
AU  - Szép, Róbert
TI  - Assessing the variations in the chemical composition of rainwater and air masses using the zonal and meridional index
JF  - ATMOSPHERIC RESEARCH
J2  - ATMOS RES
VL  - 237
PY  - 2020
PG  - 16
SN  - 0169-8095
DO  - 10.1016/j.atmosres.2020.104846
UR  - https://m2.mtmt.hu/api/publication/31156817
ID  - 31156817
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Szép, Róbert
AU  - Bodor, Zsolt
AU  - Miklóssy, Ildikó
AU  - Niță, I-A
AU  - Oprea, OA
AU  - Keresztesi, Ágnes
TI  - Influence of peat fires on the rainwater chemistry in intra-mountain basins with specific atmospheric circulations (Eastern Carpathians, Romania)
JF  - SCIENCE OF THE TOTAL ENVIRONMENT
J2  - SCI TOTAL ENVIRON
VL  - 647
PY  - 2019
SP  - 275
EP  - 289
PG  - 15
SN  - 0048-9697
DO  - 10.1016/j.scitotenv.2018.07.462
UR  - https://m2.mtmt.hu/api/publication/3403706
ID  - 3403706
AB  - A comprehensive study on the chemical composition of precipitation, the influence of peat fires and their relations with atmospheric circulation was conducted in the year of 2012, in two intra-mountain basins, the Ciuc basin (CB) and the Giurgeu basin (GB), Eastern Carpathians, Romania. Atmospheric circulation types showed the presence of a westerly anticyclonic circulation, characterized by a strong development of the Azores High to the northern Atlantic, contributing to the appearance of peat-fires. Using ROCADA daily gridded climatic datasets, the maximum and minimum daily temperatures were extracted, showing deviation from 2 degrees C to 6 degrees C in the studied year against the multiannual mean for the 1981-2016 period. Rainwater samples were analyzed for pH, major anions and cations; HCO3- concentrations were calculated based on the empirical relationship between pH and HCO3-. The results showed that 45.16% and 54.55% of precipitation had pH > 7.0 at CB and GB, respectively. NH3, NH4+ and Ca2+ are the main neutralizing agents. The significant correlation between SO42- and NH4+ (r = 0.711 - CB; r = 0.736 - GB) indicated neutralization by NH3 in the forms of (NH4)(2)SO4 and NH4HSO4. Positive regression coefficient between the sum of (H+ + [NH4+] + [Ca2+]) and the sum of ([nss - SO42-] + [NO3-]) (r = 0.855 CB; r = 0.796 - GB), showed that acid neutralization was primarily brought by NH4+ and/or CaCO3. Using Na as an indicator of marine origin, the proportions of sea salt and non-sea-salt were estimated fromelemental ratios. According to correlation analysis and PCA, main acidic ions (SO42- and NO3-) and NH4+ were mainly derived from anthropogenic activities (biomass burning, peat fires, fertilization), while Ca2+ and Mg2+ originated from terrestrial sources. The behavior of gaseous pollutants and smoke distribution resulted from peat fires were deciphered using the HYSPLIT model in a case study. (c) 2018 Elsevier B.V. All rights reserved.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Szép, Róbert
AU  - Elena, Mateescu
AU  - Aurelia, Cristina Nechifor
AU  - Keresztesi, Ágnes
TI  - Chemical characteristics and source analysis on ionic composition of rainwater collected in the Carpathians "Cold Pole", Ciuc basin, Eastern Carpathians, Romania
JF  - ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
J2  - ENVIRON SCI POLLUT R
VL  - 24
PY  - 2017
IS  - 35
SP  - 27288
EP  - 27302
PG  - 15
SN  - 0944-1344
DO  - 10.1007/s11356-017-0318-2
UR  - https://m2.mtmt.hu/api/publication/3282406
ID  - 3282406
LA  - English
DB  - MTMT
ER  -