Publications

Base-line study of precipitation chemistry at Tjeldbergodden in Aure county May 1999 - April 2000. NILU OR

Haugsbakk, I.

BASELINE ambient air quality monitoring at KPIZ, Abu Dhabi. NILU OR

Tibi, N.; Gopinath, V.

Abu Dhabi Ports Company (ADPC) is a master developer and regulator of ports in Abu Dhabi Emirate. The development of Khalifa Port and Industrial Zone (KPIZ) is one of the major strategic projects undertaken by ADPC. The KPIZ is located at Al Taweelah, midway between Dubai and Abu Dhabi City.
The survey aims to establish background AAQ levels at the project site and to compare the measured data with pertinent ambient air quality standards.
This report provides a summary of ambient air quality and meteorological measurements carried out during the 6 month period 24 August 2010 to 24 February 2011 which is referred to as Report No. 6.

Baseline Determination for Threshold-Based Interpretation and Groups of Single-Particle Aerosol Fluorescence Measurements

Yan, Sen; Davis, Gemma; Ruane, Jason; Martínez-Bracero, Moisés; O’Connor, Noel E.; Chen, Jiayao; O’Connor, David J.

Real-time single-particle fluorescence instruments are increasingly used for bioaerosol monitoring, yet interpretation of fluorescence-positive particles depends strongly on how the baseline or threshold is defined. This study evaluates deionised water (H2O), sodium chloride (NaCl), and quartz/silica (SiO2) as low-fluorescence references for the SwisensPoleno Jupiter and examines how baseline selection influences threshold-based interpretation. Controlled reference datasets were used to characterise baseline fluorescence distributions, assess particle size effects, and define baseline-specific thresholds using a consistent mean plus three standard deviations (μ+3σ) criterion. Threshold sensitivity was also examined using the empirical 99th percentile (P99) and a robust median absolute deviation (MAD)-based approach. The three reference materials produced distinct baseline responses. NaCl generated the broadest fluorescence ranges across all excitation sources, with μ+3σ upper thresholds of approximately 52.0×10−3, 39.3×10−3, and 38.2×10−3 arbitrary units, compared with 6.6×10−3, 10.1×10−3, and 3.1×10−3 for H2O and 12.1×10−3, 9.1×10−3, and 2.6×10−3 for SiO2. Although NaCl produced larger and more variable particles, its broader response persisted within a shared 10–30 µm size interval. Applying the thresholds to representative test materials showed that baseline choice altered both the proportion of particles exceeding the low-fluorescence background and their excitation–source combination patterns, particularly for near-baseline and moderately fluorescent samples. P99 generally produced results closest to μ+3σ, whereas MAD-based thresholds produced larger changes for several baseline–source combinations, while baseline–material differences remained evident across all three approaches. Summer and winter ambient case studies showed the same baseline dependence. H2O- and SiO2-based thresholds produced broadly similar fluorescence exceedance structures, whereas NaCl-based thresholds retained fewer weakly fluorescent particles. These findings show that both baseline material and threshold definition should be reported explicitly and that the resulting categories should be interpreted as operational fluorescence exceedance patterns rather than definitive biological particle classifications.

Baseline of air pollution from 2000 to 2002. NILU F

Sivertsen, B.; Ahmed, H.; Saleh, A.; El Seoud, A.A.

Basic data assimilation methods for use in urban air quality assessment.

Denby, B.; Pochmann, M.

Basic data assimilation methods: Application to the urban scale. Poster presentation. NILU PP

Denby, B.

Bayesian inverse modeling and source location of an unintended 131I release in Europe in the fall of 2011.

Tichý, O.; Šmídl, V.; Hofman, R.; Šindelárová, K.; Hýža, M.; Stohl, A.

Bedre byluft 2015. Forskningsresultater og utvikling av prognoser for meteorologi og luftkvalitet i norske byer 2015. MET report, 5/2016

Denby, B.R.; Sundvor, I.; Høiskar, B.A.K.; Süld, J.; Kristensen, A.

Bedre byluft 2014/2015. Prognoser for meteorologi og luftkvalitet i norske byer vinteren 2014-2015. MET report, 23/2015

Denby, B.R.; Süld, J.; Sundvor, I.; Høiskar, B.A.K.; Nilssen, U.; Gislefoss, K.; Olsen, T.; Kristensen, A.

Bedre byluft. Endringer i 2014 og forskningsresultater av prognoser for meteorologi og luftkvalitet i norske byer vinteren 2013-2014. MET report, 8/2015

Denby, B.R.; Sundvor, I.; Süld, J.; Kristensen, A.; Vallejo, I.; Walker, S.E.

Bedre byluft. Evaluering av prognosemodell for meteorologi og luftkvalitet vinteren 2004/2005. met.no report, no. 14/2005

Ødegaard, V.; Gjerstad, K.I.; Bjergene, N.

Bedre byluft. Evaluering av prognosemodell for meteorologi og luftkvalitet vinteren 2006/2007. met.no report, 8/2007

Ødegaard, V.; Gjerstad, K.I.; Bjergene, N.

Bedre byluft. Prognoser for meteorologi og luftkvalitet i norske byer vinteren 2010-2011. met.no report, 8/2011

Ødegaard, V.; Gjerstad, K.I.; Abildsnes, H.; Olsen, T.