scholarly journals The Use of Trajectory Cluster Analysis to Evaluate the Long-Range Transport of Black Carbon Aerosol in the South-Eastern Baltic Region

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Steigvilė Byčenkienė ◽  
Vadimas Dudoitis ◽  
Vidmantas Ulevicius
Keyword(s):  
Cluster Analysis ◽  
Black Carbon ◽  
Strong Impact ◽  
Baltic Region ◽  
The South ◽  
Air Masses ◽  
South Eastern ◽  
Black Carbon Aerosol ◽  
Concentration Weighted Trajectories ◽  
Eastern Baltic

Trajectory cluster analysis and source-receptor models (the potential source contribution function (PSCF), concentration weighted trajectories (CWT), and trajectory source apportionment (TSA)) were applied to investigate the source-receptor relationship for the aerosol black carbon (BC) measured at the coastal site (Preila, 55.55°N, 21.04°E) during 2013. The main sources and paths of advection to the south-eastern Baltic region and its relation to black carbon concentration were identified. The 72 h backward trajectories of air masses arriving at Preila from January to December 2013 were determined and were categorized by clustering them into six clusters. Subsequently, BC levels at Preila associated with each air mass cluster during this period were analyzed. The PSCF and CWT analysis shows that, on high BC concentration days, the air masses commonly originated and passed over southern regions of Europe before arriving at Preila in winter, while a strong impact of wildfires was observed in spring.

Long-term black carbon variation in the South-Eastern Baltic Region in 2008–2015

2019 ◽  
Vol 10 (1) ◽  
pp. 123-133 ◽  
Author(s):  
Lina Davuliene ◽  
Jonas Sakalys ◽  
Vadimas Dudoitis ◽  
Agnė Reklaite ◽  
Vidmantas Ulevicius
Keyword(s):  
Black Carbon ◽  
Baltic Region ◽  
The South ◽  
South Eastern ◽  
Eastern Baltic

Long-term air pollution trend analysis in the South-eastern Baltic region, 1981–2017

2021 ◽  
Vol 247 ◽  
pp. 105191
Author(s):  
Lina Davuliene ◽  
Dalia Jasineviciene ◽  
Inga Garbariene ◽  
Jelena Andriejauskiene ◽  
Vidmantas Ulevicius ◽  
...  
Keyword(s):  
Air Pollution ◽  
Trend Analysis ◽  
Baltic Region ◽  
The South ◽  
South Eastern ◽  
Eastern Baltic

scholarly journals Black carbon in the marine boundary layer over the North Atlantic and seas of the Russian arctic in june-september 2017

2019 ◽  
Vol 59 (5) ◽  
pp. 771-776
Author(s):  
V. P. Shevchenko ◽  
V. M. Kopeikin ◽  
A. N. Novigatsky ◽  
G. V. Malafeev
Keyword(s):  
Boundary Layer ◽  
Black Carbon ◽  
North Atlantic ◽  
Marine Boundary Layer ◽  
The Arctic ◽  
Air Masses ◽  
South Eastern ◽  
The North ◽  
The North Atlantic ◽  
Eastern Baltic

The paper presents the results of a study of the concentrations of black carbon in the marine boundary layer over the Baltic and North Seas, the North Atlantic, the Norwegian, the Barents, the Kara and the Laptev seas from June 30 to September 29, 2017 in the 68th and 69th voyages of research vessel "Akademik Mstislav Keldysh". Black carbon has a significant impact on climate change and the degree of pollution of the Arctic. Black carbon is formed as a result of incomplete combustion of fossil fuels (primarily coal, oil) and biomass or biofuel. It consists of submicron particles and their aggregates and can be transported a great distance from the source. Samples were taken by pumping air for 46 hours through quartz filters Hahnemule at an altitude of 10 m above sea level in a headwind to prevent smoke of the vessel from entering the filters. Subsequently, the black carbon content was determined in the laboratory by the aetalometric method. The backward trajectories of the air mass transfer and the black carbon particles transported by them to the sampling points were calculated using the HYSPLIT (Hybrid Single-Particle Lagrangian Integrated Trajectory) model at http://www.arl.noaa.gov/ready.html. The conducted studies show low values of black carbon concentrations (50 ng/m3) along the expedition route when air masses came from the background areas of the North Atlantic and the Arctic. High concentrations of black carbon (100200 ng/m3 and higher) are characteristic for areas with active navigation (the South-Eastern Baltic, the North Sea) and near ports (eg Reykjavik), as well as for incoming air masses from the industrialized regions of Europe to South-Eastern Baltic and from areas of oil and gas fields where associated gas is flared (the North, the Norwegian and the Kara seas).

scholarly journals Absolute chronology of the Zedmar culture: Re-thinking radiocarbon dates

2017 ◽  
Vol 44 (1) ◽  
pp. 256-268
Author(s):  
Magdalena Kozicka
Keyword(s):  
Bayesian Analysis ◽  
Statistical Models ◽  
Archaeological Sites ◽  
Baltic Region ◽  
The South ◽  
Radiocarbon Dates ◽  
South Eastern ◽  
Calibration Methods ◽  
Eastern Baltic

Abstract The Zedmar culture is linked with the subneolithic circle of the South-Eastern Baltic region. So far, excavations have been carried out only on seven archaeological sites. Nonetheless, there are quite a lot of radiocarbon measurements. Most of them refer to the stratigraphic contexts. This allows to integrate all of the data into statistical models. With these, it is possible to query some statements about the Zedmar culture origin and its duration. At least as long as placing the Zedmar culture into an absolute timescale may offer any solution to those issues. The idea that radiocarbon dates could provide solutions or even final answers to some arguable questions in prehistorical studies was dropped, as soon as it became clear that in the whole approach the key role is played by calibration methods and the general variability of sampled material. However – thanks to including Bayesian analysis, a better understanding of dated materials and more complex examination of received results – it has been asserted again.

scholarly journals A survey of Lepturinae Latreille, 1802 (Coleoptera: Cerambycidae) of the south-eastern Baltic region (Lithuania and the Kaliningrad Region)

Biologija ◽  
2020 ◽  
Vol 66 (4) ◽  
Author(s):  
Vytautas Tamutis ◽  
Vitalii Alekseev
Keyword(s):  
Baltic Region ◽  
The South ◽  
South Eastern ◽  
Kaliningrad Region ◽  
Eastern Baltic ◽  
Distribution Frequency

The paper presents the first review of the composition and distribution of the species Lepturinae Latreille, 1802 subfamily (Coleoptera: Cerambycidae) in the south-eastern Baltic region. A total of more than 3,000 records have been analyzed and more than 4,600 specimens collected since 1888 have been examined. The subfamily is confirmed to be represented by four tribes, 26 genera, and 38 species in the region. Previous records (published notifications) of seven species – Alosterna ingrica (Baeckmann), Brachyta interrogationis russica (Herbst), Euracmaeops marginatus (F.), Gnathacmaeops pratensis (Laichart.), Pachytodes erraticus (Dalman), Rhagium bifasciatum F. and Stictoleptura v. variicornis (Dalman) – were not confirmed in the region. The information on the distribution, frequency, and some features of ecology and zoogeography of 51 species found and expected to be found in the region is confirmed and detailed in the paper. Local temporal and geographical distributions of 36 species are mapped.

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