Variations and trends of ground-level ozone and AOT40 in the rural areas of Lithuania

Girgzdiene, R.; Bycenkiene, Svetlana; Girgždys, Aloyzas

doi:10.1007/s10661-006-9283-9

Cited by 16 publications

(13 citation statements)

References 8 publications

(8 reference statements)

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“…These changes in O 3 concentrations were typical for other parts of Central Europe (Bytnerowicz et al 2002;Bytnerowicz et al 2004;Solberg et al 2005). Higher ozone concentrations were mostly observed when air masses were transported from western Europe (Girgzdiene et al 2007). X XI XII I II III IV V VI VII VIII IX X XI XII I II III IV V The seasonal variation in air pollutant concentrations and acid deposition resulted in different significances in the relationships of the considered pollutants and pine stand defoliation.…”

Section: Seasonal Variability Of Air Temperature and Precipitation Anmentioning

confidence: 99%

The seasonal variability of air pollution effects on pine conditions under changing climates

Augustaitis¹,

Augustaitienė²,

Kliučius³

et al. 2009

Eur J Forest Res

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The multiple-stressor effects of air pollution, nutrient and water availability are the key issues of present forest ecosystem research. However, too little is known about the seasonal effect of pollutants on tree crown defoliation and their interaction with changes in climate. Therefore, data on seasonal variation in air pollution, including surface ozone, deposition of acidifying compounds and meteorological conditions, were tested against pine defoliation to identify the periods when the effect of the considered contaminants is most pronounced. The findings of the study revealed that a higher level of air concentrations of acidifying pollutants and their deposition was observed during the dormant period, with the exception of only RNH4 ? air concentrations and their monthly deposition. An increase in precipitation over the vegetation period and mean monthly temperature from September to December, as well as a decrease in temperature and precipitation over the remaining months of the dormant period represented the climate change condition over the 14-year period in the observed region. Detected changes in the considered parameters during the dormant period were found to be most significant to changes in pine crown defoliation. Therefore, we concluded that climate changes, if they occur by the detected scenarios, should mitigate the negative effect of air pollutants and acid deposition on pine crown condition.

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Section: Seasonal Variability Of Air Temperature and Precipitation Anmentioning

confidence: 99%

The seasonal variability of air pollution effects on pine conditions under changing climates

Augustaitis¹,

Augustaitienė²,

Kliučius³

et al. 2009

Eur J Forest Res

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“…The earlier investigations [16] have shown that the main source of the ground-level ozone concentration at the Preila station is the transport of ozone from other locations but not the local photochemical production. Therefore, in our study we have assumed that the ozone lifetime in the environment of this station is mainly determined by the ozone transport from higher layers to the ground-level through air turbulence, and destruction at the Earth's surface but not by the chemical loss.…”

Section: Modellingmentioning

confidence: 93%

Estimation of the ground-level ozone lifetime under rural conditions

Šakalys¹,

Girgzdiene²

2010

Lithuanian J. Phys.

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The investigation of the ozone formation and destruction is of great interest because ozone influences the atmospheric chemistry and plays an important role in the climate change. The ground-level ozone lifetime alters depending on physical and chemical properties of the locality, meteorological factors, atmospheric turbulence, and other conditions. In this paper, the method of estimation of the ozone lifetime under rural conditions is presented. The discrepancy between the solar intensity as well as related turbulent air mixing maximum and the ozone concentration maximum during the day was used in the lifetime calculations. The solar radiation intensity and duration were taken as main parameters in calculating the ozone lifetime by estimating the ozone enrichment at the ground level. In the calculations the least-squares method was applied. The groundlevel average ozone lifetime was estimated to be in the range of 3.6-5.6 hours at the rural Preila station and in the range of 2.8-3.9 hours at the Rūgšteliškis station during different seasons.

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“…The ozone concentration in Lithuania mostly varies up to 100-120 µg m -3 [7], and the level of 120 µg m -3 is observed only during less than 10% of time per year and it is usually the result of long-range transport of polluted air [7]. It is also estimated [8,9] that during the sea breeze circulation ozone concentration can rise up to a high level.…”

Section: Introductionmentioning

confidence: 99%

Variation in ozone concentration and volumetric activities of radon progeny on the Curonian Spit

Valuntaitė¹,

Jasaitis²,

Girgždienė³

et al. 2013

Lith. J. Phys.

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This paper presents the study of variation in ozone concentration and volumetric activities of radon decay products as well as their relationship at the ground level of the atmosphere on the Curonian Spit. The simultaneous measurements of the ground-level ozone concentration and volumetric activity of radon progeny gave a possibility to identify the presence of a breeze phenomenon on the Curonian Spit during an extreme weather event in summer when ozone concentration exceeded the target value of 120 µg m −3 that can have a negative impact on human health. The evident influence of wind direction on ozone concentration and volumetric activity of radon progeny was estimated.

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Variations and trends of ground-level ozone and AOT40 in the rural areas of Lithuania

Cited by 16 publications

References 8 publications

The seasonal variability of air pollution effects on pine conditions under changing climates

The seasonal variability of air pollution effects on pine conditions under changing climates

Estimation of the ground-level ozone lifetime under rural conditions

Variation in ozone concentration and volumetric activities of radon progeny on the Curonian Spit

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