Tendencies and Particularities in Thermic Inversion Episodes in the Ciuc Basin � Eastern Carpathians, Romania

Petres, Sandor

doi:10.5593/sgem2017/14/s05.056

Cited by 4 publications

(2 citation statements)

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“…An increase in the ozone concentrations can seriously affect the vegetation and human health [35]. These above-mentioned facts in the past few years led to a constantly growing concern regarding the inversion phenomenon in areas such as the Ciuc and Giurgeu basins [32].…”

Section: Resultsmentioning

confidence: 99%

Ammonium Neutralization Effect on Rainwater Chemistry in the Basins of the Eastern Carpathians - Romania

Keresztesi¹,

Petres²,

Ghita³

et al. 2018

Rev. Chim.

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A study of precipitation chemistry was conducted from 2006 January to 2016 November in the Ciuc and Giurgeu basin, Eastern Carpathians, Romania. The results show that the natural precipitation in these areas is alkaline, with a volume weighted mean (VWM) of 6.49 and 6.88 in Ciuc and Giurgeu basin, respectively. NH4+ is the most potential species to completely neutralize the rainwater over the Miercurea Ciuc (Ciuc basin) and Toplita (Giurgeu basin) area. However, in the case of Miercurea Ciuc, Ca2+ is also a potential neutralizer. Annual mean percentage concentration of NH4+ within the total principal cations is also proof that ammonium dominates the rainwater chemistry in the atmosphere of the studied basins. A comparison between the annual mean deposition fluxes showed that in the Giurgeu basin concentrations of NH4+ are higher than in the Ciuc basin. Calculations of the neutralization factors (NFs) show that at both sampling sites NH4+ contributed the most to the neutralization process. Ammonium availability index (AAI) has a value of 156.44% and 179.11% for Miercurea Ciuc and Toplia, respectively, indicating excess ammonium over the neutralization value. Fractional acidity (FA) was calculated, indicating that in Miercurea Ciuc 98.74% and in Toplita 99.28% of the rainwater acidity was neutralized. Calculation of the original and measured acidity also showed the neutralization capability of NH4+. Contributions of the marine and non-marine salts and enrichment factors were estimated, helping to identify the possible sources of the major ions in the atmosphere.

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Section: Resultsmentioning

confidence: 99%

Ammonium Neutralization Effect on Rainwater Chemistry in the Basins of the Eastern Carpathians - Romania

Keresztesi¹,

Petres²,

Ghita³

et al. 2018

Rev. Chim.

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“…Even the changes in temperature and its effect are studied for different locations there are just several studies which targets the Eastern Carpathian basins (Petres et al, 2017;Magyari-Sáska, 2006).…”

Section: Introductionmentioning

confidence: 99%

Seasons' Shifts in Some Depressions of the Eastern Carpathians, Based on Daily Temperature Analysis

Magyari-Sáska¹,

Dombay²

2020

Air and Water Components of the Environment Conference

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The Eastern Carpathians depressions were always considered as the cold corner of Romania having the lowest temperatures. With all these in the past several years in these basis where the apples and potatoes were the most common cultures, now not only maize, cherry and tomatoes are cultivated but also grape and apricot is present. Our research wanted to investigate if it's about changing in seasons length as it's present in everyday talk (ex. there's no more spring) and if it's a possibly lasting situation or not. Based on daily minimum, maximum and mean temperature values, applying K-means clustering for automatic season detection and trend analysis we found that these depressions are affected by global climate change, but this not affects the presence of the four classic season for continental climate. The seasons are notable but there are changes in how they can be characterized. The most notable result in our current research is that there are significant trends in summers' minimum, maximum and mean temperatures for all these depressions. The year 2006 could be considered as breaking year for daily mean temperatures as the obtained two periods has a significant difference regarding the daily mean temperature value with an absolute difference between 1.1 -1.3 degree Celsius.

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The Analysis of the Chemical Composition of Precipitation During the Driest Year from the Last Decade

Keresztesi¹,

Boga²,

Bodor³

et al. 2019

Present Environment and Sustainable Development

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In order to investigate the precipitation chemistry, studies were carried out from January 2013 to December 2013 in Odorheiu Secuiesc and Miercurea Ciuc, Eastern Carpathians, Romania. During a period of eleven years (2006 – 2016), 2013 was the driest year. The rainwater samples were analyzed for pH, major anions and cations. HCO3− concentrations were calculated based on the empirical relationship between pH and HCO3−. NH4+, Ca2+, SO42− were the dominant ions in precipitation at both sites. The pH values varied from 6.75 to 7.46 Miercurea Ciuc, and from 6.69 to 7.67 in Odorheiu Secuiesc. The neutralization was mainly brought by Ca2+ and NH4+. Estimated ratios of sea-salt fraction (SSF), non-sea-salt fraction (NSSF), and results from Spearman’s rank correlation and Principal Component Analysis (PCA), showed that the acidic ions (SO42−, NO3−) were derived from anthropogenic activities, NH4+ from soil fertilization, while Ca2+, Mg2+, K+ originated from terrestrial source. These influence the precipitations ionic content, especially during droughts. Spatial variations and the rim effect of the Eastern Carpathians on precipitation chemistry is also shown.

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Tendencies and Particularities in Thermic Inversion Episodes in the Ciuc Basin � Eastern Carpathians, Romania

Cited by 4 publications

References 0 publications

Ammonium Neutralization Effect on Rainwater Chemistry in the Basins of the Eastern Carpathians - Romania

Ammonium Neutralization Effect on Rainwater Chemistry in the Basins of the Eastern Carpathians - Romania

Seasons' Shifts in Some Depressions of the Eastern Carpathians, Based on Daily Temperature Analysis

The Analysis of the Chemical Composition of Precipitation During the Driest Year from the Last Decade

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