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.
Topics: Aerosol, Environmental science, Lattice QCD, Geology, Nucleon
Papers published on a yearly basis
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TL;DR: In this paper, a computationally efficient module to describe organic aerosol partitioning and chemical aging has been developed and implemented into the EMAC atmospheric chemistry-climate model, which can be used to estimate the relative contributions of SOA and POA to total OA, determine how SOA concentrations are affected by biogenic and anthropogenic emissions, and evaluate the effects of photochemical aging and long-range transport on the OA budget.
Abstract: . A computationally efficient module to describe organic aerosol (OA) partitioning and chemical aging has been developed and implemented into the EMAC atmospheric chemistry–climate model. The model simulates the formation of secondary organic aerosol (SOA) from semivolatile (SVOCs), intermediate-volatility (IVOCs), and volatile organic compounds (VOCs). It distinguishes SVOCs from biomass burning and all other combustion sources using two surrogate species for each source category with an effective saturation concentration at 298 K of C* = 0.1 and 10 μg m−3. Two additional surrogate species with C* = 103 and 105 μg m−3 are used for the IVOCs emitted by the above source categories. Gas-phase photochemical reactions that change the volatility of the organics are taken into account. The oxidation products (SOA-sv, SOA-iv, and SOA-v) of each group of precursors (SVOCs, IVOCs, and VOCs) are simulated separately to keep track of their origin. ORACLE efficiently describes the OA composition and evolution in the atmosphere and can be used to (i) estimate the relative contributions of SOA and primary organic aerosol (POA) to total OA, (ii) determine how SOA concentrations are affected by biogenic and anthropogenic emissions, and (iii) evaluate the effects of photochemical aging and long-range transport on the OA budget. We estimate that the global average near-surface OA concentration is 1.5 μg m−3 and consists of 7% POA from fuel combustion, 11% POA from biomass burning, 2% SOA-sv from fuel combustion, 3% SOA-sv from biomass burning, 15% SOA-iv from fuel combustion, 28% SOA-iv from biomass burning, 19% biogenic SOA-v, and 15% anthropogenic SOA-v. The modeled tropospheric burden of OA components is 0.23 Tg POA, 0.16 Tg SOA-sv, 1.41 Tg SOA-iv, and 1.2 Tg SOA-v.
60 citations
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Royal Netherlands Meteorological Institute1, Finnish Meteorological Institute2, Norwegian Meteorological Institute3, University of Bremen4, Belgian Institute for Space Aeronomy5, Pierre-and-Marie-Curie University6, Max Planck Society7, European Centre for Medium-Range Weather Forecasts8, Deutscher Wetterdienst9, Paul Sabatier University10, Academy of Athens11, Aristotle University of Thessaloniki12, Forschungszentrum Jülich13, The Cyprus Institute14
TL;DR: The European MACC (Monitoring Atmospheric Composition and Climate) project is preparing the operational Copernicus Atmosphere Monitoring Service (CAMS), one of the services of the European COPernicus Programme on Earth observation and environmental services as discussed by the authors.
Abstract: The European MACC (Monitoring Atmospheric Composition and Climate) project is preparing the operational Copernicus Atmosphere Monitoring Service (CAMS), one of the services of the European Copernicus Programme on Earth observation and environmental services. MACC uses data assimilation to combine in situ and remote sensing observations with global and regional models of atmospheric reactive gases, aerosols, and greenhouse gases, and is based on the Integrated Forecasting System of the European Centre for Medium-Range Weather Forecasts (ECMWF). The global component of the MACC service has a dedicated validation activity to document the quality of the atmospheric composition products. In this paper we discuss the approach to validation that has been developed over the past 3 years. Topics discussed are the validation requirements, the operational aspects, the measurement data sets used, the structure of the validation reports, the models and assimilation systems validated, the procedure to introduce new upgrades, and the scoring methods. One specific target of the MACC system concerns forecasting special events with high-pollution concentrations. Such events receive extra attention in the validation process. Finally, a summary is provided of the results from the validation of the latest set of daily global analysis and forecast products from the MACC system reported in November 2014.
59 citations
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TL;DR: In this article, a combination of field observations and laboratory experiments was used to determine how atmospheric aging transforms the intrinsic oxidative potential (OPmassDTT) of fresh biomass burning organic aerosols (BBOA).
Abstract: Oxidative potential (OP), which is the ability of certain components in atmospheric particles to generate reactive oxidative species (ROS) and deplete antioxidants in vivo, is a prevailing toxicological mechanism underlying the adverse health effects associated with exposure to ambient aerosols. While previous studies have identified the high OP of fresh biomass burning organic aerosols (BBOA), it remains unclear how it evolves throughout atmospheric transport. Using the dithiothreitol (DTT) assay as a measure of OP, a combination of field observations and laboratory experiments is used to determine how atmospheric aging transforms the intrinsic OP (OPmassDTT) of BBOA. For ambient BBOA collected during the fire seasons in Greece, OPmassDTT was observed to increase by a factor of 2.1 ± 0.9 for samples of atmospheric ages up to 68 h. Laboratory experiments indicate that aqueous photochemical aging (aging by UVB and UVA photolysis; as well as OH oxidation), as well as aging by ozone and atmospheric dilution can transform the OPmassDTT of the water-soluble fraction of wood smoke within 2 days of atmospheric transport. The results from this work suggest that the air quality impacts of biomass burning emissions can extend beyond regions near fire sites and should be accounted for.
59 citations
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TL;DR: A case of third trimester pregnancy occurring in a 29 year old woman after intracytoplasmic sperm injection (ICSI) treatment with spermatozoa from a globozoospermic man is presented.
Abstract: We present a case of third trimester pregnancy occurring in a 29 year old woman after intracytoplasmic sperm injection (ICSI) treatment with spermatozoa from a globozoospermic man. We believe this is the first reported case. A 37 year old man was diagnosed with globozoospermia with normal sperm count and motility. In-vitro fertilization and subzonal insemination treatments failed to achieve fertilization of any eggs. The ICSI method produced 50% fertilization, 75% cleavage rate and a singleton pregnancy with a female fetus. No pregnancy or fetal abnormalities have been noted after > 7 months of gestation.
59 citations
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TL;DR: Perturbative and nonperturbative results on the renormalization constants of the quark field and the vector, axial-vector, pseudoscalar, scalar and tensor currents are presented in this article.
Abstract: Perturbative and nonperturbative results are presented on the renormalization constants of the quark field and the vector, axial-vector, pseudoscalar, scalar, and tensor currents. The perturbative computation, carried out at one-loop level and up to second order in the lattice spacing, is performed for a fermion action, which includes the clover term and the twisted mass parameter yielding results that are applicable for unimproved Wilson fermions, as well as for improved clover and twisted mass fermions. We consider ten variants of the Symanzik improved gauge action corresponding to ten different values of the plaquette coefficients. Nonperturbative results are obtained using the twisted mass Wilson fermion formulation employing two degenerate dynamical quarks and the tree-level Symanzik improved gluon action. The simulations are performed for pion masses in the range of 480--260 MeV and at three values of the lattice spacing, $a$, corresponding to $\ensuremath{\beta}=3.9$, 4.05, 4.20. For each renormalization factor computed nonperturbatively we subtract its perturbative $\mathcal{O}({a}^{2})$ terms so that we eliminate part of the cutoff artifacts. The renormalization constants are converted to $\overline{\mathrm{MS}}$ at a scale of $\ensuremath{\mu}=2\text{ }\text{ }\mathrm{GeV}$. The perturbative results depend on a large number of parameters and are made easily accessible to the reader by including them in the distribution package of this paper, as a Mathematica input file.
59 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 |