Jurgita Ovadnevaitė
A5080432883- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Vehicle emissions and performance
- Marine and coastal ecosystems
- Atmospheric and Environmental Gas Dynamics
- Arctic and Antarctic ice dynamics
- Ocean Acidification Effects and Responses
- Aeolian processes and effects
- Odor and Emission Control Technologies
- Environmental Policies and Emissions
- Methane Hydrates and Related Phenomena
- Industrial Gas Emission Control
- Maritime Transport Emissions and Efficiency
- Cyclone Separators and Fluid Dynamics
- Meteorological Phenomena and Simulations
- Oil Spill Detection and Mitigation
- Polar Research and Ecology
- Ocean Waves and Remote Sensing
- Energy and Environment Impacts
- Geophysics and Gravity Measurements
- Climate variability and models
- Isotope Analysis in Ecology
Ollscoil na Gaillimhe – University of Galway
2016-2025
German Meteorological Service
2021
National University of Ireland
2021
University College Dublin
2021
NILU
2018
Finnish Meteorological Institute
2013
University of Eastern Finland
2013
Institute of Atmospheric Sciences and Climate
2013
National Research Council
2013
Center for Physical Sciences and Technology
2011-2012
Abstract. Organic aerosols (OA) represent one of the major constituents submicron particulate matter (PM1) and comprise a huge variety compounds emitted by different sources. Three intensive measurement field campaigns to investigate aerosol chemical composition all over Europe were carried out within framework European Integrated Project on Aerosol Cloud Climate Air Quality Interactions (EUCAARI) Monitoring Evaluation Programme (EMEP) during 2008 (May–June September–October) 2009...
Abstract In the atmosphere nighttime removal of volatile organic compounds is initiated to a large extent by reaction with nitrate radical (NO 3 ) forming nitrates which partition between gas and particulate phase. Here we show based on particle phase measurements performed at suburban site in Netherlands that contribute substantially mass. Comparisons chemistry transport model indicate most measured are formed NO oxidation. Using aerosol composition data from three intensive observation...
Abstract Sea spray aerosol (SSA) generated by bubble bursting at the ocean surface is an important component of aerosol‐cloud interactions over remote oceans, providing atmosphere with ice‐nucleating particles (INPs) or required for heterogeneous ice nucleation. Studies have shown that organic INPs are emitted during phytoplankton blooms, but changes in INP number concentrations ( n ) due to biological activity not been directly demonstrated natural SSA. In this study, a clean sector sampler...
Organic aerosol (OA) is a key component of total submicron particulate matter (PM1), and comprehensive knowledge OA sources across Europe crucial to mitigate PM1 levels. has well-established air quality research infrastructure from which yearlong datasets using 21 chemical speciation monitors (ACSMs) 1 mass spectrometer (AMS) were gathered during 2013-2019. It includes 9 non-urban 13 urban sites. This study developed state-of-the-art source apportionment protocol analyse long-term spectrum...
[1] High-time resolution measurements of primary marine organic sea-spray physico-chemical properties reveal an apparent dichotomous behavior in terms water uptake: specifically aerosol enriched matter possesses a low hydroscopic Growth Factor (GF∼1.25) while simultaneously having cloud condensation nucleus/condensation nuclei (CCN/CN) activation efficiency between 83% at 0.25% supersaturation and 100% 0.75%. In contrast, the particles dominated by non-sea-salt (nss)-sulfate ranged 48–100%...
A High Resolution Time of Flight Aerosol Mass Spectrometer (HR‐ToF‐AMS) was evaluated for its ability to quantify submicron sea salt mass concentrations. The evaluation included both laboratory and field studies. Quantification the signal in HR‐ToF‐AMS achieved by taking 23 Na 35 Cl + ion as a surrogate then identifying calibration scaling factor through comparison with mono‐disperse generated aerosol. Ambient concentrations calculated using this method agreed well those obtained...
Abstract. Chemically resolved atmospheric aerosol data sets from the largest intercomparison of Aerodyne chemical speciation monitors (ACSMs) performed to date were collected at French supersite SIRTA. In total 13 quadrupole ACSMs (Q-ACSM) European ACTRIS ACSM network, one time-of-flight (ToF-ACSM), and high-resolution ToF mass spectrometer (AMS) operated in parallel for about 3 weeks November December~2013. Part 1 this study reports on accuracy precision instruments all measured species....
Abstract. A new sea spray source function (SSSF), termed Oceanflux Sea Spray Aerosol or OSSA, was derived based on in-situ aerosol measurements along with meteorological/physical parameters. Submicron fluxes from particle number concentration at the Mace Head coastal station, west coast of Ireland, were used together open-ocean eddy correlation flux Eastern Atlantic Spray, Gas Flux, and Whitecap (SEASAW) project cruise. In overlapping size range, data for SEASAW found to be in a good...
[1] Using on-line High-Resolution Aerosol Mass Spectrometry, we report submicron organic marine aerosol plume concentrations peaking at 3.8 μg m−3. These are far greater than previously determined by off-line techniques and can exceed typical terrestrial of aerosol. The mass comprised 77% the total non-refractory such plumes were associated with regions high biological activity moderately-high wind speeds over N.E. Atlantic. High-resolution spectra analysis revealed a unique fingerprint,...
Abstract. Aerosol–cloud interactions (ACI) constitute the single largest uncertainty in anthropogenic radiative forcing. To reduce uncertainties and gain more confidence simulation of ACI, models need to be evaluated against observations, particular measurements cloud condensation nuclei (CCN). Here we present a data set – ready used for model validation long-term observations CCN number concentrations, particle size distributions chemical composition from 12 sites on 3 continents. Studied...
Abstract. As part of the European ACTRIS project, first large Quadrupole Aerosol Chemical Speciation Monitor (Q-ACSM) intercomparison study was conducted in region Paris for 3 weeks during late-fall – early-winter period (November–December 2013). The week dedicated to tuning and calibration each instrument, whereas second third were side-by-side comparison ambient conditions with co-located instruments providing independent information on submicron aerosol optical, physical, chemical...
Three years of continuous Aerosol Mass Spectrometry measurements at the Mace Head Global Atmosphere Watch research station revealed seasonal patterns in chemical composition submicron NE Atlantic marine aerosol as well distinct signatures associated with air masses different origin (i.e., polar, Arctic, or tropical). Concentrations secondary inorganic species and both primary organic compounds were closely related to oceanic biological activity ranged from low median mass concentrations...
Abstract Bursting bubbles at the ocean-surface produce airborne salt-water spray-droplets, in turn, forming climate-cooling marine haze and cloud layers. The reflectance ultimate cooling effect of these layers is determined by spray’s water-uptake properties that are modified through entrainment organic matter ( OM ) into droplets. We present new results illustrating a clear dependence mass-fraction enrichment sea spray ss on both phytoplankton-biomass, from Chlorophyll-a Chl-a Net Primary...
Abstract. Particulate matter (PM) pollution is a severe environmental problem in the Beijing–Tianjin–Hebei (BTH) region North China. PM studies have been conducted extensively Beijing, but chemical composition, sources, and atmospheric processes of are still relatively less known nearby Tianjin Hebei. In this study, fine urban Shijiazhuang (the capital Hebei Province) was characterized using an Aerodyne quadrupole aerosol speciation monitor (Q-ACSM) from 11 January to 18 February 2014. The...
Atmospheric aerosols in clean remote oceanic regions contribute significantly to the global albedo through formation of haze and cloud layers; however, relative importance 'primary' wind-produced sea-spray over secondary (gas-to-particle conversion) sulphate forming marine clouds remains unclear. Here we report on (PM1) Southern Ocean around Antarctica, terms their physical, chemical, droplet activation properties. Two predominant pristine air masses aerosol populations were encountered:...
Abstract. Secondary aerosol constitutes a large fraction of fine particles in urban air China. However, its formation mechanisms and atmospheric processes remain largely uncertain despite considerable study recent years. To elucidate the seasonal variations fine-particle composition secondary formation, an Aerodyne quadrupole chemical speciation monitor (Q-ACSM), combined with other online instruments, was used to characterize sub-micrometer particulate matter (diameter < 1 µm, PM1)...
Cloud condensation nuclei (CCN) number concentrations alongside with submicrometer particle size distributions and chemical composition have been measured at atmospheric observatories of the Aerosols, Clouds, Trace gases Research InfraStructure (ACTRIS) as well other international sites over multiple years. Here, harmonized data records from 11 are summarized, spanning 98,677 instrument hours for CCN data, 157,880 distributions, 70,817 data. The represent nine different environments, e.g.,...
Climate warming affects the development and distribution of sea ice, but at present evidence polar ecosystem feedbacks on climate through changes in atmosphere is sparse. By means synergistic atmospheric oceanic measurements Southern Ocean near Antarctica, we that microbiota ice ice-influenced ocean are a previously unknown significant source organic nitrogen, including low molecular weight alkyl-amines. Given keystone role nitrogen compounds aerosol formation, growth neutralization, our...
Similarities and differences in the submicron atmospheric aerosol chemical composition are analyzed from a unique set of measurements performed at 21 sites across Europe for least one year. These located between 35 62°N 10° W – 26°E, represent various types settings (remote, coastal, rural, industrial, urban). Measurements were all carried out on-line with 30-min time resolution using mass spectroscopy based instruments known as Aerosol Chemical Speciation Monitors (ACSM) Mass Spectrometers...
Abstract. Source apportionment of organic aerosols (OAs) is great importance to better understand the health impact and climate effects particulate matter air pollution. Air quality models are used as potential tools identify OA components sources at high spatial temporal resolution; however, they generally underestimate concentrations, comparisons their outputs with an extended set measurements still rare due lack long-term experimental data. In this study, we addressed such challenges...
Organosulfur compounds are important components of secondary organic aerosols (SOA). While the Aerodyne high-resolution time-of-flight aerosol mass spectrometer (AMS) has been extensively used in studies, response AMS to organosulfur is not well-understood. Here, we investigated fragmentation patterns organosulfurs and inorganic sulfates AMS, developed a method deconvolve total sulfate into origins, applied this both laboratory field measurements. Apportionment results from isoprene...
Abstract Sulfate aerosols are typically the dominant source of cloud condensation nuclei (CCN) over remote oceans and their abundance is thought to be dominating factor in determining oceanic brightness. Their activation into droplets depends on dynamics (i.e. vertical updrafts) competition with other potential CCN sources for condensing water. We present new experimental results from Southern Ocean illustrating that, a given updraft, peak supersaturation reached cloud, consequently number...
Significance Recycling of reactive iodine from heterogeneous processes on sea-salt aerosol was hypothesized over two decades ago to play an important role in the atmospheric cleansing capacity. However, understanding this mechanism has been limited laboratory studies and not confirmed atmosphere until now. We present measurement gas-phase interhalogen species show that their production via processing marine aerosols is remarkably fast. These observations reveal recycling atomic through...