Institution
The Cyprus Institute
Other•Nicosia, Cyprus•
About: The Cyprus Institute is a other organization based out in Nicosia, Cyprus. It is known for research contribution in the topics: Aerosol & Environmental science. The organization has 418 authors who have published 1252 publications receiving 32586 citations.
Papers published on a yearly basis
Papers
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TL;DR: This work uses off the shelf digital components to provide a novel approach of interacting with 3D replicas of museum objects and evaluated the visitors’ experience using the system and report on its acceptance.
56 citations
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TL;DR: In this paper, the authors employ the WRF-Chem model to study summertime air pollution and their impact on air quality over the eastern Mediterranean region of Cyprus, where the CYPHEX campaign took place in July 2014.
Abstract: . We employ the WRF-Chem model to study summertime air pollution,
the intense photochemical activity and their impact on air quality over the
eastern Mediterranean. We utilize three nested domains with horizontal
resolutions of 80, 16 and 4 km, with the finest grid focusing on the
island of Cyprus, where the CYPHEX campaign took place in July 2014.
Anthropogenic emissions are based on the EDGAR HTAP global emission
inventory, while dust and biogenic emissions are calculated online. Three
simulations utilizing the CBMZ-MOSAIC, MOZART-MOSAIC, and RADM2-MADE/SORGAM
gas-phase and aerosol mechanisms are performed. The results are compared with
measurements from a dense observational network of 14 ground stations in
Cyprus. The model simulates T2 m , Psurf , and
WD10 m accurately, with minor differences in WS10 m between
model and observations at coastal and mountainous stations attributed to
limitations in the representation of the complex topography in the model. It
is shown that the south-eastern part of Cyprus is mostly affected by
emissions from within the island, under the dominant (60 %) westerly flow
during summertime. Clean maritime air from the Mediterranean can reduce
concentrations of local air pollutants over the region during westerlies.
Ozone concentrations are overestimated by all three mechanisms
(9 % ≤ NMB ≤ 23 %) with the smaller mean bias (4.25 ppbV)
obtained by the RADM2-MADE/SORGAM mechanism. Differences in ozone
concentrations can be attributed to the VOC treatment by the three
mechanisms. The diurnal variability of pollution and ozone precursors is not
captured (hourly correlation coefficients for O 3 ≤ 0.29). This
might be attributed to the underestimation of NO x concentrations by local
emissions by up to 50 %. For the fine particulate matter ( PM2.5 ),
the lowest mean bias (9 µ g m −3 ) is obtained with the
RADM2-MADE/SORGAM mechanism, with overestimates in sulfate and ammonium
aerosols. Overestimation of sulfate aerosols by this mechanism may be linked
to the SO2 oxidation in clouds. The MOSAIC aerosol mechanism
overestimates PM2.5 concentrations by up to
22 µ g m −3 due to a more pronounced dust component compared to
the other two mechanisms, mostly influenced by the dust inflow from the
global model. We conclude that all three mechanisms are very sensitive to
boundary conditions from the global model for both gas-phase and aerosol
pollutants, in particular dust and ozone.
56 citations
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TL;DR: In this article, a PM2.5-capable aerosol chemical speciation monitor (Q-ACSM) was deployed in urban Nanjing, China, for the first time to measure in situ non-refractory fine particle composition from 20 October to 19 November 2015, along with parallel measurements of submicron aerosol (PM1) species.
Abstract: . A PM2.5-capable aerosol chemical speciation monitor (Q-ACSM) was deployed in urban Nanjing, China, for the first time to measure in situ non-refractory fine particle (NR-PM2.5) composition from 20 October to 19 November 2015, along with parallel measurements of submicron aerosol (PM1) species by a standard Q-ACSM. Our results show that the NR-PM2.5 species (organics, sulfate, nitrate, and ammonium) measured by the PM2.5-Q-ACSM are highly correlated (r2 > 0.9) with those measured by a Sunset Lab OC / EC analyzer and a Monitor for AeRosols and GAses (MARGA). The comparisons between the two Q-ACSMs illustrated similar temporal variations in all NR species between PM1 and PM2.5, yet substantial mass fractions of aerosol species were observed in the size range of 1–2.5 µm. On average, NR-PM1−2.5 contributed 53 % of the total NR-PM2.5, with sulfate and secondary organic aerosols (SOAs) being the two largest contributors (26 and 27 %, respectively). Positive matrix factorization of organic aerosol showed similar temporal variations in both primary and secondary OAs between PM1 and PM2.5, although the mass spectra were slightly different due to more thermal decomposition on the capture vaporizer of the PM2.5-Q-ACSM. We observed an enhancement of SOA under high relative humidity conditions, which is associated with simultaneous increases in aerosol pH, gas-phase species (NO2, SO2, and NH3) concentrations and aerosol water content driven by secondary inorganic aerosols. These results likely indicate an enhanced reactive uptake of SOA precursors upon aqueous particles. Therefore, reducing anthropogenic NOx, SO2, and NH3 emissions might not only reduce secondary inorganic aerosols but also the SOA burden during haze episodes in China.
56 citations
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56 citations
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TL;DR: In this paper, the seasonal variability of the main submicron aerosol constituents and decipher the sources of organic aerosol was studied during a year-long period (26 July 2016-31 July 2017) and two wintertime intensive campaigns.
Abstract: . Submicron aerosol chemical composition was studied during a year-long
period (26 July 2016–31 July 2017) and two wintertime intensive campaigns
(18 December 2013–21 February 2014 and 23 December 2015–17 February 2016),
at a central site in Athens, Greece, using an Aerosol Chemical Speciation
Monitor (ACSM). Concurrent measurements included a particle-into-liquid
sampler (PILS-IC), a scanning mobility particle sizer (SMPS), an AE-33
Aethalometer, and ion chromatography analysis on 24 or 12 h filter samples.
The aim of the study was to characterize the seasonal variability of the main
submicron aerosol constituents and decipher the sources of organic aerosol
(OA). Organics were found to contribute almost half of the submicron mass,
with 30 min resolution concentrations during wintertime reaching up to
200 µ g m −3 . During winter (all three campaigns combined),
primary sources contributed about 33 % of the organic fraction, and comprised
biomass burning (10 %), fossil fuel combustion (13 %), and cooking
(10 %), while the remaining 67 % was attributed to secondary aerosol.
The semi-volatile component of the oxidized organic aerosol (SV-OOA;
22 %) was found to be clearly linked to combustion sources, in
particular biomass burning; part of the very oxidized,
low-volatility component (LV-OOA; 44 %) could also be attributed to the
oxidation of emissions from these primary combustion sources. These results, based on the combined contribution of biomass burning organic
aerosol (BBOA) and SV-OOA, indicate the importance of increased biomass
burning in the urban environment of Athens as a result of the economic recession.
During summer, when concentrations of fine aerosols are considerably lower,
more than 80 % of the organic fraction is attributed to secondary aerosol
(SV-OOA 31 % and LV-OOA 53 %). In contrast to winter, SV-OOA appears
to result from a well-mixed type of aerosol that is linked to fast photochemical
processes and the oxidation of primary traffic and biogenic emissions.
Finally, LV-OOA presents a more regional character in summer, owing to the
oxidation of OA over the period of a few days.
56 citations
Authors
Showing all 459 results
Name | H-index | Papers | Citations |
---|---|---|---|
Philippe Ciais | 149 | 965 | 114503 |
Jonathan Williams | 102 | 613 | 41486 |
Jos Lelieveld | 100 | 570 | 37657 |
Andrew N. Nicolaides | 90 | 572 | 30861 |
Efstathios Stiliaris | 88 | 340 | 25487 |
Leonard A. Barrie | 74 | 177 | 17356 |
Nikos Mihalopoulos | 69 | 280 | 15261 |
Karl Jansen | 57 | 498 | 11874 |
Jean Sciare | 56 | 129 | 9374 |
Euripides G. Stephanou | 54 | 128 | 14235 |
Lefkos T. Middleton | 54 | 184 | 15683 |
Elena Xoplaki | 53 | 129 | 12097 |
Theodoros Christoudias | 50 | 197 | 7765 |
Dimitris Drikakis | 49 | 286 | 7136 |
George K. Christophides | 48 | 127 | 11099 |