A5060638719- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Air Quality and Health Impacts
- Aeolian processes and effects
- Ocean Acidification Effects and Responses
- Microbial Community Ecology and Physiology
- Marine Bivalve and Aquaculture Studies
- Fire effects on ecosystems
- Paleontology and Stratigraphy of Fossils
- Ionosphere and magnetosphere dynamics
- Allelopathy and phytotoxic interactions
- Air Quality Monitoring and Forecasting
- Food Industry and Aquatic Biology
- Geophysics and Gravity Measurements
- Methane Hydrates and Related Phenomena
- Plant responses to elevated CO2
- Fusion materials and technologies
- Indoor Air Quality and Microbial Exposure
- RNA Interference and Gene Delivery
- Cell death mechanisms and regulation
- Plant-Microbe Interactions and Immunity
Analytical Mechanics Associates (United States)
2025
Langley Research Center
2021-2024
Oak Ridge Associated Universities
2022-2023
Los Alamos National Laboratory
2018-2023
Oak Ridge National Laboratory
2022-2023
Universities Space Research Association
2021-2022
National Postdoctoral Association
2021
Universidade dos Açores
2013-2020
University of Bologna
2016-2020
Abstract With their extensive coverage, marine low clouds greatly impact global climate. Presently, are poorly represented in climate models, and the response of to changes atmospheric greenhouse gases aerosols remains major source uncertainty simulations. The eastern North Atlantic (ENA) is a region persistent but diverse subtropical boundary layer clouds, whose albedo precipitation highly susceptible perturbations aerosol properties. In addition, ENA periodically impacted by continental...
Abstract. The response of marine low cloud systems to changes in aerosol concentration represents one the largest uncertainties climate simulations. Major contributions this uncertainty are derived from poor understanding under natural conditions and perturbation by anthropogenic emissions. eastern North Atlantic (ENA) is a region persistent but diverse boundary layer (MBL) clouds, whose albedo precipitation highly susceptible perturbations properties. In study, we examine MBL properties,...
Abstract We use a simple model of spherical biomass burning aerosol particle containing an internal mixture black carbon (BC) and organic (OC) with effective refractive index calculated as volume fraction‐weighted mean indices. Brown (BrC) is considered to be OC imaginary part at the blue end solar spectrum higher (in absolute value) than red end. Mie‐scattering formalism employed calculate absorption Ångström exponent (AAE) function single‐scattering albedo (SSA) for set BC indices,...
Abstract Ecosystem functioning is simultaneously affected by changes in community composition and environmental change such as increasing atmospheric carbon dioxide ( CO 2 ) subsequent ocean acidification. However, it largely remains uncertain how the effects of these factors compare to each other. Addressing this question, we experimentally tested hypothesis that initial elevated are equally important regulation phytoplankton biomass. We full‐factorially exposed three compositionally...
As Asian urban areas continue to expand, so will their contribution global greenhouse gas (GHG) emissions, driven primarily by increases in fossil fuel combustion. Left unchecked, these emissions negatively impact air quality and climate, therefore it is imperative that emission sources are properly identified accounted for inventories. Enhancement ratios of GHGs have been used characterize regional as either dominated combustion or biomass burning. In particular, airborne assessment...
Southeast Asia experiences widespread wildfires and biomass burning events during the dry season (January to April), leading poor air quality, haze, smog. NASA conducted Airborne Satellite Investigation of Asian Air Quality (ASIA-AQ) flight campaign in February March 2024 study contribution smoke urban quality through a multi-faceted observational approach (aircraft, satellite, ground). The deployed DC-8 aircraft, equipped with instruments from Langley Aerosol Research Group (LARGE) other...
Abstract. Marine phytoplankton have developed the remarkable ability to tightly regulate concentration of free calcium ions in intracellular cytosol at a level ~ 0.1 μmol L−1 presence seawater Ca2+ concentrations 10 mmol L−1. The low cytosolic ion is utmost importance for proper cell signalling function. While regulatory mechanisms responsible tight control are not completely understood, taxonomic groups appear evolved different strategies, which may affect their cope with changes...
Abstract. Cloud droplet chemical composition is a key observable property that can aid understanding of how aerosols and clouds interact. As part the Clouds, Aerosols Monsoon Processes – Philippines Experiment (CAMP2Ex), three case studies were analyzed involving collocated airborne sampling relevant clear cloudy air masses associated with maritime warm convection. Two cases represented polluted marine background, signatures transported East Asian regional pollution, aged over water for...
Accurate fire emissions inventories are crucial to predict the impacts of wildland fires on air quality and atmospheric composition. Two traditional approaches widely used calculate emissions: a satellite-based top-down approach fuels-based bottom-up approach. However, these methods often considerably disagree amount particulate mass emitted from fires. Previously available observational datasets tended be sparse, lacked statistics needed resolve methodological discrepancies. Here, we...
Abstract. The NASA North Atlantic Aerosols and Marine Ecosystems Study (NAAMES) ship aircraft field campaign deployed to the western subarctic between years 2015 2018. One of primary goals NAAMES is improve understanding aerosol–cloud interaction (ACI) over Ocean under different seasonal regimes. ACIs currently represent largest source uncertainty in global climate models. During three campaigns (NAAMES-1 November 2015, NAAMES-2 May 2016, NAAMES-3 September 2017), multiple 10 h science...
Abstract Seven years of data collected at the Atmospheric Radiation Measurement's Eastern North Atlantic (ENA) site are analyzed to understand controls Cloud Condensation Nuclei (CCN) concentrations in region. Day‐night differences aerosol as segregated by wind direction demonstrate observations be impacted local emissions when (wdir) is between 90° and 310° (measured clockwise from where air coming from). Data during marine conditions (wdir <90° or wdir >310°) show CCN higher summer...
Abstract. High-time-resolution measurements of in situ aerosol and cloud properties provide the ability to study regional atmospheric processes that occur on timescales minutes hours. However, one limitation this approach is continuous often include periods when data collected are not representative aerosol. Even at remote locations, submicron aerosols pervasive ambient atmosphere with many sources. Therefore, dominated by local should be identified before conducting subsequent analyses...
Abstract. The eastern North Atlantic (ENA) is a region dominated by pristine marine environment and subtropical boundary layer clouds. Under unperturbed atmospheric conditions, the regional aerosol regime in ENA varies seasonally due to different seasonal surface-ocean biogenic emissions, removal processes, meteorological regimes. However, during periods when impacted particles transported from continental sources, properties within change significantly, affecting concentration of cloud...
Abstract. Atmospheric marine particle concentrations impact cloud properties, which strongly the amount of solar radiation reflected back into space or absorbed by ocean surface. While satellites can provide a snapshot current conditions at overpass time, models are necessary to simulate temporal variations in both and properties. However, poor model accuracy limits reliability with these tools be used predict future climate. Here, we leverage comprehensive ecosystem atmospheric...
Viral infection of phytoplankton is a pervasive mechanism cell death and bloom termination, which leads to the production dissolved colloidal organic matter that can be aerosolized into atmosphere. Earth-observing satellites track growth blooms on weekly time scales but impact viral cloud forming potential associated aerosols largely unknown. Here, we determine influence viral-derived matter, purified viruses, marine hydrogels condensation nuclei activity their solutions, compared exudates...
Cyclopeptides (CPs) have been recognized as excellent templates for the rational design of biologically active compounds. However, in absence constraining elements, even small cyclotetrapeptides (CTPs) and cyclopentapeptides (CPPs) may show conformational heterogeneity, with occurrence mixtures cis/trans ‐peptide bonds. In this paper, we discuss synthesis CTP CPP model compounds containing 5‐aminomethyloxazolidine‐2,4‐dione (Amo)‐dipeptide scaffolds, which combine a β/α‐hybrid dipeptide...
Abstract. The response of marine low cloud systems to changes in aerosol concentration represents one the largest uncertainties climate simulations. Major contributions this uncertainty derive from poor understanding under natural conditions and perturbation by anthropogenic emissions. Eastern North Atlantic (ENA) is a region persistent but diverse boundary layer (MBL) clouds, whose albedo precipitation are highly susceptible perturbations properties. In study, we examine MBL properties,...
Sites with naturally high CO2 conditions provide unique opportunities to forecast the vulnerability of coastal ecosystems ocean acidification, by studying biological responses and potential adaptations this increased environmental variability. In study, we investigated bivalve Ervilia castanea in sandy sediments at reference sites volcanic seeps off Azores, where pH bottom waters ranged from average oceanic levels 8.2, along gradients, down 6.81, carbonated seawater seeps. The population...
Abstract In-situ marine cloud droplet number concentrations (CDNCs), condensation nuclei (CCN), and CCN proxies, based on particle sizes optical properties, are accumulated from seven field campaigns: ACTIVATE; NAAMES; CAMP 2 EX; ORACLES; SOCRATES; MARCUS; CAPRICORN2. Each campaign involves aircraft measurements, ship-based or both. Measurements collected over the North Central Atlantic, Indo-Pacific, Southern Oceans, represent a range of clean to polluted conditions in various climate...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 575:31-42 (2017) - DOI: https://doi.org/10.3354/meps12197 Phytoplankton interactions can alter species response present and future CO2 concentrations Eduardo Sampaio1,3,*, Francesca Gallo1, Kai G. Schulz2, B. Azevedo1, Joana Barcelos e Ramos1 1Centre of Climate, Meteorology Global Change University Azores...
Cancer cells demonstrate elevated expression levels of the inhibitor apoptosis proteins (IAPs), contributing to tumor cell survival, disease progression, chemo-resistance, and poor prognosis. Smac/DIABLO is a mitochondrial protein that promotes by neutralizing members IAP family. Herein, we describe preparation in vitro validation synthetic mimic Smac/DIABLO, based on fluorescent polyethylene glycol (PEG)-coated silica-core nanoparticles (NPs) carrying Smac/DIABLO-derived pro-apoptotic...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 589:33-44 (2018) - DOI: https://doi.org/10.3354/meps12450 Responses of diatom Asterionellopsis glacialis increasing sea water CO2 concentrations and turbulence Francesca Gallo1,*, Kai G. Schulz2, Eduardo B. Azevedo1, João Madruga1, Joana Barcelos e Ramos1 1Institute for Agricultural Environmental Research...
Abstract. High time-resolution measurements of in situ aerosol and cloud properties provide the ability to study regional atmospheric processes that occur on timescales minutes hours. However, one limitation this approach is continuous often include periods when data collected are not representative aerosol. Even at remote locations, submicron aerosols pervasive ambient atmosphere with many sources. Therefore, dominated by local should be identified before conducting subsequent analyses...