Johan Mellqvist

2025

Measurement of methane leakages from lakes in the Siljan Ring

2025

Coastal methane emissions triggered by ship passages

2024

Evaluating modelled tropospheric columns of CH4, CO, and O3 in the Arctic using ground-based Fourier transform infrared (FTIR) measurements

2024

Results from exploratory project on NOx emissions from Ocean Going Vessels (OGV) using remote sniffer measurements

2024

An uncertainty methodology for solar occultation flux measurements: ammonia emissions from livestock production

2024

Recent Decreases in the Growth Rate of Atmospheric HCFC-22 Column Derived From the Ground-Based FTIR Harmonized Retrievals at 16 NDACC Sites

Validating CFD modelling of ship plume dispersion in an urban environment with pollutant concentration measurements

2023

International maritime regulation decreases sulfur dioxide but increases nitrogen oxide emissions in the North and Baltic Sea

2023

Volatility of a Ship’s Emissions in the Baltic Sea Using Modelling and Measurements in Real-World Conditions

2023

Performance assessment of state-of-the-art and novel methods for remote compliance monitoring of sulfur emissions from shipping

2023

Methane emissions from industrial activities using drones

2023

Ammonia and methane emissions from dairy concentrated animal feeding operations in California, using mobile optical remote sensing

2022

Quantification of methane emissions from cattle farms, using the tracer gas dispersion method

2022

Measurement of Sulfur-Dioxide Emissions from Ocean-Going Vessels in Belgium Using Novel Techniques

2021

Characterization and potential for reducing optical resonances in Fourier transform infrared spectrometers of the Network for the Detection of Atmospheric Composition Change (NDACC)

2021

Best practice report on compliance monitoring of ships with respect to current and future IMO regulation

2021

Surveillance of Sulfur Fuel Content in Ships at the Great Belt Bridge 2020

2021

Nationell luftövervakning, Sakrapport med data från övervakning inom Programområde Luft t.o.m 2019

2021

Validation of methane and carbon monoxide from Sentinel-5 Precursor using TCCON and NDACC-IRWG stations

2021

Characterization of Air Toxics and Greenhouse Gas Emission Sources and Their Impacts on Community-Scale Air Quality Levels in Disadvantaged Communities

2020

A transition of atmospheric emissions of particles and gases from on-road heavy-duty trucks

2020

Surveillance of Sulfur Fuel Content in Ships at the Great Belt Bridge 2019

Mobile optical measurements of emissions and fenceline concentrations from oil and gas production

Remote emission measurements of marine vessels in real operation to check compliance with IMO legislation and investigate influence on air quality

2019

What explains SECA compliance: rational calculation or moral judgment?

Measurements of fugitive emissions of vocs from stationary sources using the SOF method - Standardization efforts and results from recent studies in California

2017

Certification of an aircraft and airborne surveillance of fuel sulfur content in ships at the SECA border

2017

Fixed remote surveillance of fuel sulfur content in ships from fixed sites in the Göteborg ship channel and Öresund bridge

2017

Surveillance of Sulfur Emissions from Ships in Danish Waters

2016

Quantification of Gaseous Emissions from Gas Stations, Oil Wells and Agriculture using Optical Solar Occultation Flux and Tracer Correlation Methods

2016

Quantification of stack emissions from marine vessels

2016

Using Solar Occultation Flux and Other Optical Remote Sensing Techniques to Fully Characterize and Quantify Fugitive Emissions from refineries and oil depots

2016

Photochemical Smog in China: Scientific challenges and implications for air quality policies

Quantification of Gas Emissions from Refineries, Gas Stations, Oil Wells and Agriculture using Optical Solar Occultation Flux and Tracer Correlation Methods

2016

Remote Quantification of Stack Emissions from Marine Vessels

Quantification of VOC emissions using tracer dispersion, Mobile Extractive FTIR (MEFTIR) and Mobile Whitecell-DOAS (MWDOAS)

2015

Emission factors of SO2, NOx and particles from ships in Neva Bay from ground-based and helicopter-borne measurements and AIS-based modeling

2015

Trends of ozone total columns and vertical distribution from FTIR observations at eight NDACC stations around the globe

Measurements of fugitive emissions using the solar occultation flux method

2014

Quantitative measurements and modeling of industrial formaldehyde emissions in the Greater Houston area during campaigns in 2009 and 2011

2014

Airborne emission measurements of SO2, NOx and particles from individual ships using a sniffer technique

2014

Field test of available methods to measure remotely SOx and NOx emissions from ships

2014

Identification of Gross Polluting Ships to Promote a Level Playing Field within the Shipping Sector

2014

Emission measurements of alkenes, alkanes, SO2, and NO2 from stationary sources in Southeast Texas over a 5 year period using SOF and mobile DOAS

Measurements of fugitive emission using the Solar Occultation Flux (SOF) method

2013

Measurements of air pollution emission factors for marine transportation in SECA

Quantifying industrial emissions by measuring infrared intensity of solar spectra - the SOF technique

2012

Primary and secondary sources of formaldehyde in urban atmospheres: Houston Texas region

2012

Ship emissions of SO2 and NO2: DOAS measurements from airborne platforms

2011

Evaluations of NOx and highly reactive VOC emission inventories in Texas and their implications for ozone plume simulations during the Texas Air Quality Study 2006

2011

Quantification of industrial emissions of VOCs, NO2 and SO2 by SOF and Mobile DOAS

2011

A new method to detect long term trends of methane (CH4) and nitrous oxide (N2O) total columns measured within the NDACC ground-based high resolution solar FTIR network

2011

Carbon monoxide (CO) and ethane (C2H6) trends from ground-based solar FTIR measurements at six European stations, comparison and sensitivity analysis with the EMEP model

2010

Quantification of NO2 and SO2 emissions from the Houston Ship Channel and Texas City industrial areas during the 2006 Texas Air Quality Study

2010

Measurements of industrial emissions of alkenes in Texas using the solar occultation flux method

2010

Measurements of industrial emissions of alkenes in Texas using the solar occultation flux method

2010

IDENTIFICATION OF GROSS POLLUTING SHIPS

2010

Validation of five years (2003-2007) of SCIAMACHY CO total column measurements using ground-based spectrometer observations

Airborne Measurements of Ethene from Industrial Sources Using Laser Photo-Acoustic Spectroscopy

Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE)

2008

Trend analysis of greenhouse gases over Europe measured by a network of ground-based remote FTIR instruments

2008

Evaluation of tropospheric and stratospheric ozone trends over Western Europe from ground-based FTIR network observations

2008

Validation of ACE-FTS N2O measurements

2007

Photochemical modelling in the Po basin with focus on formaldehyde and ozone

2007

Modelling constraints on the emission inventory and on vertical dispersion for CO and SO2 in the Mexico City Metropolitan Area using Solar FTIR and zenith sky UV spectroscopy

Validation of MIPAS ClONO2 measurements

Modelling constraints on the emission inventory and on vertical diffusion for CO and SO2 in the Mexico City Metropolitan Area using Solar FTIR and zenith UV spectroscopy

Method for measuring of gaseous emissions and/or flux

Photochemical modeling in the Po basin with focus on formaldehyde and ozone

Intercomparison of four different in-situ techniques for ambient formaldehyde measurements in an urban air

Separation of emitted and photochemical formaldehyde in Mexico City using a statistical analysis and a new pair of gas phase tracers

Comparisons between SCIAMACHY and ground-based FTIR data for total columns of CO, CH4, CO2 and N20

Method for measurements of gas emission and gas flux

FTIR Measurements of Stratospheric Trace Species at Harestua, Norway, during the winter 2002-2003 and Comparison with a 3-D Model

Mobile column measurements of CO in megacities

A Quantitative Assessment of the 1998 Carbon Monoxide Emission Anomaly in the Northern Hemisphere Based on Total Column and Surface Concentration Measurements

Increased Northern Hemispheric Carbon Monoxide Burden in the Troposphere in 2002 and 2003 Detected from the Ground and from Space

Mobile Measurements of Atmospheric CO Columns in Megacities, Using a Mid Resolution Infrared Spectrometer and a Rapid Solar Tracker

2002

Ground-based FTIR observations of chlorine activation and ozone depletion inside the Arctic vortex during the winter of 1999/2000

2001

Flare testing using the SOF method at Borealis Polyethylene in the summer of 2000

Application of Infrared and UV-Visible Remote Sensing Techniques for Studying the Stratosphere and for Estimating Antrophogenic Emissions

1996

DOAS for flue gas monitoring—III. In-situ monitoring of sulfur dioxide, nitrogen monoxide and ammonia

1996

DOAS for flue gas monitoring—II. Deviations from the Beer-Lambert law for the UV/visible absorption spectra of NO, NO2, SO2 and NH3

1996

DOAS for flue gas monitoring—I. Temperature effects in the UV/visible absorption spectra of NO, NO2, SO2 and NH3

Application of dispersive UV-visible absorption spectroscopy for in-situ detection of gaseous pollutants in flue gases

1992

Temperature dependence of the absorption spectra of nitrogen oxide, nitrogen dioxide and sulfur dioxide in the application of differential optical absorption spectroscopy