Browsing NILU Brage by Author "Hamer, Paul David"
Now showing items 1-20 of 27
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Air pollution situation in small towns, including winter resorts: a comparative study of three cases in Northern Europe
Tammekivi, Terje; Kaasik, Marko; Hamer, Paul David; Sousa Santos, Gabriela; Šteinberga, Iveta (Peer reviewed; Journal article, 2023)In Europe, emissions of many air pollutants have decreased in recent decades, but there exist sites where concentrations of pollutants are still high and have become a public health problem. The air quality monitoring ... -
Air quality in 7 Norwegian municipalities in 2015. Summary report for NBV results.
Tarrasón, Leonor; Sousa Santos, Gabriela; Vo, Dam Thanh; Hamer, Paul David; Vogt, Matthias; Lopez-Aparicio, Susana; Røen, Håvard Vika; Høiskar, Britt Ann Kåstad (NILU report;15/2018, Research report, 2018)This report documents the methodology used to compile air quality information for the year 2015 in seven Norwegian municipality areas under the first phase of development of the Norwegian Air Quality Planning Tool, also ... -
An Evaluation of the EnKF vs. EnOI and the Assimilation of SMAP, SMOS and ESA CCI Soil Moisture Data over the Contiguous US
Blyverket, Jostein; Hamer, Paul David; Bertino, Laurent; Albergel, Clement; Fairbairn, David; Lahoz, William A. (Journal article; Peer reviewed, 2019)A number of studies have shown that assimilation of satellite derived soil moisture using the ensemble Kalman Filter (EnKF) can improve soil moisture estimates, particularly for the surface zone. However, the EnKF is ... -
Appropriate Assimilation Methods for Air Quality Prediction and Pollutant Emission Inversion. An Urban Data Assimilation Systems Report.
Hamer, Paul David; Walker, Sam-Erik; Schneider, Philipp (NILU report;25/2020, Research report, 2021)This report presents a review of data assimilation methods applicable to air quality. In the introduction, we first describe a brief history of data assimilation method development in the context of numerical weather ... -
Assessment of Low-Cost Particulate Matter Sensor Systems against Optical and Gravimetric Methods in a Field Co-Location in Norway
Vogt, Matthias; Schneider, Philipp; Castell, Nuria; Hamer, Paul David (Peer reviewed; Journal article, 2021)The increased availability of commercially-available low-cost air quality sensors combined with increased interest in their use by citizen scientists, community groups, and professionals is resulting in rapid adoption, ... -
Cloud-scale modelling of the impact of deep convection on the fate of oceanic bromoform in the troposphere: a case study over the west coast of Borneo
Hamer, Paul David; Marécal, Virginie; Hossaini, Ryan; Pirre, Michel; Krysztofiak, Gisele; Ziska, Franziska; Engel, Andreas; Sala, Stephan; Keber, Timo; Bönisch, Harald; Atlas, Elliot; Krüger, Kirstin; Chipperfield, Martyn P. (Peer reviewed; Journal article, 2021)This paper presents a modelling study on the fate of CHBr3 and its product gases in the troposphere within the context of tropical deep convection. A cloud-scale case study was conducted along the west coast of Borneo, ... -
Daily high-resolution surface PM2.5 estimation over Europe by ML-based downscaling of the CAMS regional forecast
Shetty, Shobitha; Hamer, Paul David; Stebel, Kerstin; Kylling, Arve; Hassani, Amirhossein; Berntsen, Terje Koren; Schneider, Philipp (Peer reviewed; Journal article, 2025)Fine particulate matter (PM2.5) is a key air quality indicator due to its adverse health impacts. Accurate PM2.5 assessment requires high-resolution (e.g., atleast 1 km) daily data, yet current methods face challenges in ... -
Data Fusion for Enhancing Urban Air Quality Modeling using Large-Scale Citizen Science
O'Regan, Anna C.; Grythe, Henrik; Hellebust, Stig; Lopez-Aparicio, Susana; O’Dowd, Colin; Hamer, Paul David; Sousa Santos, Gabriela; Nyhan, Marguerite M. (Peer reviewed; Journal article, 2024)Rapid urbanization has led to many environmental issues, including poor air quality. With urbanization set to continue, there is an urgent need to mitigate air pollution and minimize its adverse health impacts. This study ... -
Data fusion of sparse, heterogeneous, and mobile sensor devices using adaptive distance attention
Lepioufle, Jean-Marie; Schneider, Philipp; Hamer, Paul David; Ødegård, Rune Åvar; Vallejo, Islen; Cao, Tuan-Vu; Taherkordi, Amirhosein; Wojcikowski, Marek (Peer reviewed; Journal article, 2024)In environmental science, where information from sensor devices are sparse, data fusion for mapping purposes is often based on geostatistical approaches. We propose a methodology called adaptive distance attention that ... -
ESA CCI Soil Moisture for improved Earth system understanding: State-of-the art and future directions
Dorigo, Wouter; Wagner, Wolfgang; Albergel, Clement; Albrecht, Franziska; Balsamo, Gianpaolo; Brocca, Luca; Chung, Daniel; Ertl, Martin; Forkel, Matthias; Gruber, Alexander; Haas, Eva; Hamer, Paul David; Hirschi, Martin; Ikonen, Jaakko; de Jeu, Richard; Kidd, Richard; Lahoz, William A.; Liu, Yi Y.; Miralles, Diego G; Mistelbauer, Thomas; Nicolai-Shaw, Nadine; Parinussa, Robert; Pratola, Chiara; Reimer, Christoph; van der Schalie, Robin; Seneviratne, Sonia I.; Smolander, Tuomo; Lecomte, Pascal (Journal article; Peer reviewed, 2017) -
Estimating surface NO2 concentrations over Europe using Sentinel-5P TROPOMI
Shetty, Shobitha; Schneider, Philipp; Stebel, Kerstin; Hamer, Paul David; Kylling, Arve; Berntsen, Terje Koren (Peer reviewed; Journal article, 2024)Satellite observations from instruments such as the TROPOspheric Monitoring Instrument (TROPOMI) show significant potential for monitoring the spatiotemporal variability of NO2, however they typically provide vertically ... -
Evaluation of isoprene emissions from the coupled model SURFEX–MEGANv2.1
Oumami, Safae; Arteta, Joaquim; Guidard, Vincent; Tulet, Pierre; Hamer, Paul David (Peer reviewed; Journal article, 2024)Isoprene, a key biogenic volatile organic compound, plays a pivotal role in atmospheric chemistry. Due to its high reactivity, this compound contributes significantly to the production of tropospheric ozone in polluted ... -
First implementation of secondary inorganic aerosols in the MOCAGE version R2.15.0 chemistry transport model
Guth, Jonathan; Josse, B.; Marecal, V; Joly, M.; Hamer, Paul David (Journal article; Peer reviewed, 2016) -
Halogen chemistry in volcanic plumes: a 1D framework based on MOCAGE 1D (version R1.18.1) preparing 3D global chemistry modelling
Marécal, Virginie; Voisin-Plessis, Ronan; Roberts, Tarda Jane; Aiuppa, Alessandro; Narivelo, Herizo; Hamer, Paul David; Josse, Beatrice; Guth, Jonathan; Surl, Luke (Peer reviewed; Journal article, 2023)HBr emissions from volcanoes lead rapidly to the formation of BrO within volcanic plumes and have an impact on tropospheric chemistry, at least at the local and regional scales. The motivation of this paper is to prepare ... -
The influence of vegetation drought stress on formaldehyde and ozone distributions over a central European city
Trimmel, Heidelinde; Hamer, Paul David; Mayer, Monika; Schreier, Stefan F.; Weihs, Philipp; Eitzinger, Josef; Sandén, Hans; Fitzky, Anne Charlott; Richter, Andreas; Calvet, Jean-Christophe; Bonan, Bertrand; Meurey, Catherine; Vallejo, Islen; Eckhardt, Sabine; Sousa Santos, Gabriela; Oumami, Safae; Arteta, Joaquim; Marécal, Virginie; Tarrasón, Leonor; Karl, Thomas; Rieder, Harald E. (Peer reviewed; Journal article, 2023)To estimate the effect of vegetation stress and changes in biogenic volatile organic compound (BVOC) emissions on urban ozone (O3) levels we perform a systematic, observation-based analysis of the relationship between ... -
Modeling study of the impact of SO2 volcanic passive emissions on the tropospheric sulfur budget
Lamotte, Claire; Guth, Jonathan; Marécal, Virginie; Cussac, Martin; Hamer, Paul David; Theys, Nicolas; Schneider, Philipp (Peer reviewed; Journal article, 2021)Well constrained volcanic emissions inventories in chemistry transport models are necessary to study the impacts induced by these sources on the tropospheric sulfur composition and on sulfur species concentrations and ... -
Monitoring Soil Moisture Drought over Northern High Latitudes from Space
Blyverket, Jostein; Hamer, Paul David; Schneider, Philipp; Albergel, Clement; Lahoz, William A. (Journal article; Peer reviewed, 2019)Mapping drought from space using, e.g., surface soil moisture (SSM), has become viable in the last decade. However, state of the art SSM retrieval products suffer from very poor coverage over northern latitudes. In this ... -
Primary aerosol and secondary inorganic aerosol budget over the Mediterranean Basin during 2012 and 2013
Guth, Jonathan; Marécal, Virginie; Josse, Béatrice; Arteta, Joaquim; Hamer, Paul David (Journal article; Peer reviewed, 2018) -
A regional modelling study of halogen chemistry within a volcanic plume of Mt Etna's Christmas 2018 eruption
Narivelo, Herizo; Hamer, Paul David; Marécal, Virginie; Surl, Luke; Roberts, Tjarda; Pelletier, Sophie; Josse, Béatrice; Guth, Jonathan; Bacles, Mickaël; Warnach, Simon; Wagner, Thomas; Corradini, Stefano; Salerno, Giuseppe; Guerrieri, Lorenzo (Peer reviewed; Journal article, 2023)Volcanoes are known to be important emitters of atmospheric gases and aerosols, which for certain volcanoes can include halogen gases and in particular HBr. HBr emitted in this way can undergo rapid atmospheric oxidation ... -
Review of methods that can be used in the assessment of atmospheric deposition
Aas, Wenche; Soares, Joana; Hamer, Paul David; Schneider, Philipp; Svendby, Tove Marit; Guerreiro, Cristina (NILU report;33/2022, Research report, 2023)There are three main approaches for estimating the atmospheric deposition: 1) From measurements of air and precipitation chemistry combined with statistical interpolation, 2) Chemical transport models, 3) Combined observations ...