Johan Mellqvist
My research involves developing and using optical remote sensing methods and other state of the art measurement techniques to improve the understanding of various environmental problems. The work includes developing and applying strategies to measure gaseous emissions from various sources such as ships, airplanes, industrial gas leaks agricultural activities and volcanoes. It also includes long term monitoring and interpretation of the abundance of various species in the atmosphere. In particular the research can be divided into four areas that will be described during the talk, i.e. a) Atmospheric studies using ground based high resolution FTIR of the sun, b) Mobile FTIR measurements of the sun to obtain fluxes c) Mobile UV/visible measurements and d) Ship emission measurements.

Visar 75 publikationer
Methane emissions from industrial activities using drones
Quantification of methane emissions from cattle farms, using the tracer gas dispersion method
Measurement of Sulfur-Dioxide Emissions from Ocean-Going Vessels in Belgium Using Novel Techniques
Nationell luftövervakning, Sakrapport med data från övervakning inom Programområde Luft t.o.m 2019
Surveillance of Sulfur Fuel Content in Ships at the Great Belt Bridge 2020
Surveillance of Sulfur Fuel Content in Ships at the Great Belt Bridge 2019
A transition of atmospheric emissions of particles and gases from on-road heavy-duty trucks
What explains SECA compliance: rational calculation or moral judgment?
Mobile optical measurements of emissions and fenceline concentrations from oil and gas production
Surveillance of Sulfur Emissions from Ships in Danish Waters
Quantification of stack emissions from marine vessels
Photochemical Smog in China: Scientific challenges and implications for air quality policies
Remote Quantification of Stack Emissions from Marine Vessels
Measurements of fugitive emissions using the solar occultation flux method
Field test of available methods to measure remotely SOx and NOx emissions from ships
Identification of Gross Polluting Ships to Promote a Level Playing Field within the Shipping Sector
Measurements of air pollution emission factors for marine transportation in SECA
Measurements of fugitive emission using the Solar Occultation Flux (SOF) method
Ship emissions of SO2 and NO2: DOAS measurements from airborne platforms
Primary and secondary sources of formaldehyde in urban atmospheres: Houston Texas region
Measurements of industrial emissions of alkenes in Texas using the solar occultation flux method
Measurements of industrial emissions of alkenes in Texas using the solar occultation flux method
Airborne Measurements of Ethene from Industrial Sources Using Laser Photo-Acoustic Spectroscopy
Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)
Validation of ACE-FTS N2O measurements
Validation of MIPAS ClONO2 measurements
Photochemical modelling in the Po basin with focus on formaldehyde and ozone
Photochemical modeling in the Po basin with focus on formaldehyde and ozone
Comparisons between SCIAMACHY and ground-based FTIR data for total columns of CO, CH4, CO2 and N20
Mobile column measurements of CO in megacities
Flare testing using the SOF method at Borealis Polyethylene in the summer of 2000
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Visar 17 forskningsprojekt
Mätning av metangasutsläpp från industriella aktiviteter med drönare
"SCIPPER" Shipping contributions to inland pollution push for the enforcement of regulations
Studier av fartygens rökgasemissioner av organiska partiklar
Fotokemisk smog i Kina: Bildning, omvandling, effekter och åtgärdsstrategier
Improved evaluation of SOF, mobile DOAS a during NASA Discover AQ
Environmental impact of low sulphur ship fuel: measurement and modelling strategies (EnviSuM)
Compliance monitoring pilot for Marpol Annex VI (CompMon)
Analysis of Solar Occultation Flux
Efterutvärdering och analys av växhusgastrender ur infraröda solspektra
Övervakning av totalkolumnen av klor och ozon vid Harestua mätstation