scholarly journals Atmospheric Aerosol Distribution in 2016–2017 over the Eastern European Region Based on the GEOS-Chem Model

Atmosphere ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 722
Author(s):  
Gennadi Milinevsky ◽  
Natallia Miatselskaya ◽  
Asen Grytsai ◽  
Vassyl Danylevsky ◽  
Andrey Bril ◽  
...  

The spatial and temporal distributions of atmospheric aerosols have been simulated using the GEOS-Chem model over the sparsely investigated Eastern European region. The spatial distribution of the particulate matter (PM2.5) concentration, mineral dust, black carbon, organic aerosols, sea salt, as well as nitrate, sulfate, and ammonium aerosols during 2016–2017 were considered. The aerosols’ concentration, seasonality and spatial features were determined for the region. Particulate matter (PM2.5) contamination prevails in Poland in late autumn and winter. The monthly mean PM2.5 concentration reached 55 µg m−3 over the Moscow region in the early spring of both years. The mineral dust concentration varied significantly, reaching 40 µg m−3 over the southwestern part of Eastern Europe in March 2016. The areas most polluted by black carbon aerosols were the central and southern parts of Poland in the winter. The organic aerosols’ concentration was the largest in March and April, reaching 10 µg m−3 over East Belarus. The sea salt aerosol concentration increased in the coastal regions in winter due to the wind strength. Mineral dust aerosols in Eastern Europe are mainly composed of dust, partially transported from the Ukrainian steppe and partially from the Saharan Desert.

2020 ◽  
Vol 43 (338) ◽  
pp. 61-66
Author(s):  
Sandris Ancans

AbstractThe economy of Latvia lags behind economically developed nations approximately fourfold in terms of labour productivity in the tradable sector, which is the key constituent of a modern economy, thereby affecting future sustainable development in the entire country, including the rural areas. The economic backwardness is characteristic of the entire Central and Eastern Europe. This is the heritage of a communist regime that lasted for about half a century and the economic system termed a (centrally) planned economy or a command economy. However, such a term for the communist-period economy is not correct, as it does not represent the purpose it was created for. Accordingly, the paper aims to assess the effect of the communism period on the economic backwardness of the Central and Eastern European region of the EU. A planned economy that existed in all communist countries, with the exception of Yugoslavia, was not introduced to contribute to prosperity. It was intended for confrontation or even warfare by the communist countries under the guidance of the USSR against other countries where no communism regime existed, mostly Western world nations with their market economies. For this reason, it is not correct to term it a (centrally) planned economy or a command economy; the right term is a mobilised (war) economy. An extrapolation of a geometric progression for GDP revealed that during the half a century, Latvia as part of the USSR was forced to spend on confrontation with the West not less than EUR 17 bln. (2011 prices) or approximately one gross domestic product of 2011. The research aim of the paper is to assess the effect of the communism period on the economic backwardness of the Central and Eastern European region of the EU.


2010 ◽  
Vol 10 (11) ◽  
pp. 26513-26549 ◽  
Author(s):  
E. P. Weijers ◽  
M. Schaap ◽  
L. Nguyen ◽  
J. Matthijsen ◽  
H. A. C. Denier van der Gon ◽  
...  

Abstract. To develop mitigation strategies for reducing concentrations of both PM2.5 (and PM10), the origin of particulate matter (PM) needs to be established. An intensive, one-year measurement campaign from August 2007 to August 2008 was carried out to determine the composition of PM10 and PM2.5 at five locations in the Netherlands, aiming at reducing the uncertainties on the origin of PM. Generally, a considerable conformity in the chemical composition of PM2.5 (and PM10) was observed. From all the constituents present in PM2.5, the secondary inorganic aerosol is the most dominant (42–48%), followed by total carbonaceous matter (22–37%). Contributions due to sea salt (maximum 8%), mineral dust and metals (maximum 5%) are relatively low. For the first time, a detailed overview can be presented of the composition of the coarse fraction. Compared to the fine fraction, contributions of the sea salt, mineral dust and metals are now larger resulting in a more balanced distribution between the various constituents. Through mass closure a considerable part of the PM mass could be defined (PM2.5: 80–94%). The chemical distribution on days with high PM levels showed a distinct increase of nitrate as well as in the mass not accounted for. Contributions of the remaining constituents remained equal of were lower (sea salt) when expressed in percentages. A correspondence between nitrate and the unknown mass was observed hinting at the presence of water on the filters. The contribution from natural sources in the Netherlands was estimated to be about 25% for PM10 and 20% for PM2.5.


2019 ◽  
Author(s):  
Hans-Werner Jacobi ◽  
Friedrich Obleitner ◽  
Sophie Da Costa ◽  
Patrick Ginot ◽  
Kostas Eleftheriadis ◽  
...  

Abstract. Although aerosols in the Arctic have multiple and complex impacts on the regional climate, their removal due to deposition is still not well quantified. We combined meteorological, aerosol, precipitation, and snow pack observations with simulations to derive information about the deposition of sea salt components and black carbon (BC) from November 2011 to April 2012 to the Arctic snow pack at two locations close to Ny-Ålesund, Svalbard. The dominating role of sea salt and the contribution of dust for the composition of atmospheric aerosols were reflected in the seasonal composition of the snow pack. The strong alignment of the concentrations of the major sea salt components in the aerosols, the precipitation, and the snow pack is linked to the importance of wet deposition for the transfer from the atmosphere to the snow pack. This agreement was less strong for monthly snow budgets and deposition indicating important relocation of the impurities inside the snow pack after deposition. Wet deposition was less important for the transfer of nitrate, non sea salt-sulfate, and BC to the snow during the winter period. The average BC concentration in the snow pack remains small with a limited impact on snow albedo and melting. Nevertheless, the observations also indicate an important redistribution of BC in the snowpack leading to layers with enhanced concentrations. The complex behavior of bromide due to modifications during the sea salt aerosol formation and remobilization in the atmosphere and in the snow were not resolved due to the lack of measurements in aerosols and precipitation.


2013 ◽  
Vol 13 (3) ◽  
pp. 271-277 ◽  
Author(s):  
Diah Dwiana Lestiani ◽  
Muhayatun Santoso ◽  
Syukria Kurniawati ◽  
Andreas Markwitz

Air particulate matter concentrations, black carbon as well as elemental concentrations in two semi industrial sites were investigated as a preliminary study for evaluation of air quality in these areas. Sampling of airborne particulate matter was conducted in July 2009 using a Gent stacked filter unit sampler and a total of 18 pairs of samples were collected. Black carbon was determined by reflectance measurement and elemental analysis was performed using particle induced X-ray emission (PIXE). Elements Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, Cr, Mn, Fe, Cu, Zn and As were detected. Twenty four hour PM2.5 concentration at semi industrial sites Kiaracondong and Holis ranged from 4.0 to 22.2 µg m-3, while the PM10 concentration ranged from 24.5 to 77.1 µg m-3. High concentration of crustal elements, sulphur and zinc were identified in fine and coarse fractions for both sites. The fine fraction data from both sites were analyzed using a multivariate principal component analysis and for Kiaracondong site, identified factors are attributed to sea-salt with soil dust, vehicular emissions and biomass burning, non ferrous smelter, and iron/steel work industry, while for Holis site identified factors are attributed to soil dust, industrial emissions, vehicular emissions with biomass burning, and sea-salt. Although particulate samples were collected from semi industrial sites, vehicular emissions constituted with S, Zn and BC were identified in both sites.


1970 ◽  
Vol 33 (1) ◽  
pp. 25-36 ◽  
Author(s):  
Bilkis A Begum ◽  
Swapan K Biswas

Ambient particulate matter (PM10 and PM2.5) samples were collected in different laboratories and sitting rooms at the Atomic Energy Centre Dhaka campus in Dhaka on weekdays using AirMetrics Samplers from September to December 2006.  The samples were analyzed for elemental concentrations by ED XRF method.  Black carbon was analyzed by reflectance.  The data sets were analyzed by reconstructive mass (RCM) methods to check the mass closer and also to identify the possible sources of atmospheric aerosols in these closed areas.  It was observed that in these closed areas, 74 to 98% of the particulate mass belong to fine particles mass (PM2.5).  Mostly three and four sources have been identified in both PM10 and PM2.5 fractions respectively.  The sources are soil, combustion products (signature elements are BC and OC), Pb and Zn containing sources.  It was found that about 70 to 98% of total mass is black carbon together with organic carbon.   Keywords:  RCM, PM, AECD campus, XRF method DOI: 10.3329/jbas.v33i1.2947 Journal of Bangladesh Academy of Sciences, Vol. 33, No. 1, 25-36, 2009


Author(s):  
Sofiia R. Ladyk ◽  
◽  
Kseniia F. Bazilyuk ◽  

The article considers issues related to the assessment of the socio-economic situation of Ukraine and 12 countries that are its close neighbors in the Eastern European region. It is established that today Ukraine is in a severe socio-economic crisis, which covers all spheres of society and affects the economic and political aspects of the entire Eastern European region. The deepening of the crisis in Ukraine is observed in all areas: the curtailment of production, declining employment, falling incomes and demand. With the deepening recession and budget crisis, it is difficult to carry out the necessary reforms of the Ukrainian state and economy, while the living standards of the majority of the population continue to fall, unemployment and inflation are rising. The socio-economic potential of Ukraine and selected countries of Eastern Europe in the context of those indicators that directly relate to the social status of the population is studied. Using the World Bank statistics for 2019, the following indicators were analyzed: GDP per capita, unemployment rate (% of total labor force), inflation rate (%) and corruption index. The study found that Ukraine lags significantly behind its neighbors in macroeconomic indicators. Analysis of the data of the State Statistics Service shows that in Ukraine there is a deindustrialization of the economy and a decline in industrial production. At the same time, there is a decline in the science intensity of the economy in many sectors of the industrial complex (engineering, chemical, energy), which has significantly led to rising unemployment. Indicators such as low life expectancy at birth, high inflation and corruption also indicate a difficult socio-economic situation. It is established that the illustrated tendencies are largely due, on the one hand, to the unsuccessful institutional policy of the Government of Ukraine, and on the other hand – to corruption and domination of oligarchs in the leading sectors of the economy. In order to classify the countries of Eastern Europe and identify among them the place of Ukraine in the context of selected characteristics of the socio-economic situation, cluster analysis was used, in particular the hierarchical method of Ward. As a result of using this method, a dendrogram was obtained, the visual analysis of which allows to form 4 clusters. The K-means method was used to form clusters. Based on the analysis of the constructed clusters, it was found that the highest rating in the selected indicators have the countries included in the 3rd cluster: Estonia, Poland and the Czech Republic, which are characterized by high welfare, low unemployment and corruption. Countries in the 2nd cluster have a slightly lower rating: Belarus, Bulgaria, Moldova, the Russian Federation, Romania and Hungary. These countries are characterized by a high level of corruption and a fairly high level of inflation, the rest of the indicators in this group are average. The 1st cluster includes: Latvia, Lithuania and the Slovak Republic, which have a high level of welfare, low levels of corruption and inflation, but at the same time high unemployment (average value – 6.1%). The lowest rating is given to Ukraine, which is characterized by falling incomes, high unemployment, inflation and corruption. The study proves the need for urgent effective reforms and systemic transformations in Ukraine, which will promote the rational use of its own investment potential, improve the level of management and investment policy, as well as lobby for national economic interests and create conditions for economic and institutional stability


2019 ◽  
Vol 19 (15) ◽  
pp. 10361-10377 ◽  
Author(s):  
Hans-Werner Jacobi ◽  
Friedrich Obleitner ◽  
Sophie Da Costa ◽  
Patrick Ginot ◽  
Konstantinos Eleftheriadis ◽  
...  

Abstract. Although aerosols in the Arctic have multiple and complex impacts on the regional climate, their removal due to deposition is still not well quantified. We combined meteorological, aerosol, precipitation, and snowpack observations with simulations to derive information about the deposition of sea salt components and black carbon (BC) from November 2011 to April 2012 to the Arctic snowpack at two locations close to Ny-Ålesund, Svalbard. The dominating role of sea salt and the contribution of dust for the composition of atmospheric aerosols were reflected in the seasonal composition of the snowpack. The strong alignment of the concentrations of the major sea salt components in the aerosols, the precipitation, and the snowpack is linked to the importance of wet deposition for transfer from the atmosphere to the snowpack. This agreement was less strong for monthly snow budgets and deposition, indicating important relocation of the impurities inside the snowpack after deposition. Wet deposition was less important for the transfer of nitrate, non-sea-salt sulfate, and BC to the snow during the winter period. The average BC concentration in the snowpack remains small, with a limited impact on snow albedo and melting. Nevertheless, the observations also indicate an important redistribution of BC in the snowpack, leading to layers with enhanced concentrations. The complex behavior of bromide due to modifications during sea salt aerosol formation and remobilization in the atmosphere and in the snow were not resolved because of the lack of bromide measurements in aerosols and precipitation.


Author(s):  
Anikó Imre

The article asks how we begin to assess the connections and mutual influences between television’s increasing globalisation facilitated by digital distribution platforms and the globalisation of crisis borne by the failure of the neo-liberal free market paradigm, which has resulted in the rise of nativist nationalisms, xenophobia and authoritarianism. I argue that, considering these contradictory developments as interconnected disrupts some of the epistemological paradigms inherited from the Cold War and simultaneously helps us understand – and demystify – emerging paradigms of consumer empowerment associated with streaming in television and media studies. In particular, I demonstrate the importance of resisting sweeping assessments about the globalisation of the ‘HBO-type quality drama’ by considering the operations of HBO Europe, whose pioneering localisation practices in Eastern Europe have thrived within increasingly illiberal political conditions in the post-socialist Eastern European region.


2019 ◽  
Author(s):  
Meng Li ◽  
Hang Su ◽  
Guo Li ◽  
Nan Ma ◽  
Ulrich Pöschl ◽  
...  

Abstract. Quantifying the relative importance of gas uptake on the ground and aerosol surfaces helps to determine which processes should be included in atmospheric chemistry models. Gas uptake by aerosols is often characterized by an effective uptake coefficient (γeff), whereas gas uptake on the ground is usually described by a deposition velocity (Vd). For efficient comparison, we introduce an equivalent uptake coefficient (γeqv) at which the uptake flux of aerosols would equal that on the ground surface. If γeff is similar to or larger than γeqv, aerosol uptake is important and should be included in atmospheric models. In this study, we compare uptake fluxes in the planetary boundary layer (PBL) for different reactive trace gases (O3, NO2, SO2, N2O5, HNO3, H2O2), aerosol types (mineral dust, soot, organic aerosol, sea salt aerosol), environments (urban, agricultural land, Amazon forest, water body), seasons, and mixing heights. For all investigated gases, γeqv ranges from 10−6 ~ 10−4 in polluted urban environments to 10−4 ~ 10−1 under pristine forest conditions. In urban areas, aerosol uptake is relevant for all species (γeff ≥ γeqv) and should be considered in models. On the contrary, contributions of aerosol uptakes in Amazon forest are minor compared to the dry deposition. Phase state of aerosols could be one of the crucial factors influencing the uptake rates. Current models tend to underestimate the O3 uptake on liquid organic aerosols which can be important especially over regions with γeff ≥ γeqv. H2O2 uptakes on a variety of aerosols is yet to be measured at laboratory and evaluated. Given the fact that most models have considered their uptakes on the ground surface, we suggest also considering the N2O5 uptake by all types of aerosols, HNO3 and H2O2 uptakes by mineral dust, O3 uptake by liquid organic aerosols and NO2, SO2, HNO3 uptakes by sea salt aerosols in atmospheric models.


2015 ◽  
Vol 39 (2) ◽  
pp. 147-155
Author(s):  
Bilkis A Begum ◽  
K Shahin Ahmed ◽  
M Sarkar ◽  
JB Islam ◽  
AKM Lutfor Rahman

Air borne particulate matter (PM) samples (both PM10 and PM2.5) were collected simultaneously from continuous air quality monitoring station (CAMS) at Rajshahi city from December 2012 to February 2013 using two Air Metrics MiniVol samplers. The samples were analyzed for mass and black carbon (BC) concentrations. The present results were compared with the data set during December 2001 to February 2002. It was found that the mean PM10, PM2.5 and BC concentrations have increased 3.3, 6.1 and 3.4 times, respectively than in December 2001 to February 2002 period. Similarly, the ratio of PM2.5/PM10 has increased twice than the previous cited time. In case of BC/PM2.5 ratio, value becomes more than half than the previous period. Hence, PM2.5 concentration has increased tremendously and due to the implementation of policies especially on motor vehicles, BC concentration does not increase linearly as PM2.5. The present data have showed that about 78% of PM10 is PM2.5 whereas in 2001-2002, PM2.5 was only 38% of PM10. The high PM2.5 at Rajshahi city might be due to both local effect and long-range transport.Journal of Bangladesh Academy of Sciences, Vol. 39, No. 2, 147-155, 2015


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