Browsing Bergen Open Research Archive by Author "Frette, Øyvind"
Now showing items 1-12 of 12
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Absorption properties of high-latitude Norwegian coastal water: The impact of CDOM and particulate matter
Cirennima, X; Frette, Øyvind; Hamre, Børge; Erga, Svein Rune; Chen, Yi-Chun; Zhao, Lu; Sørensen, Kai; Norli, Marit; Stamnes, Knut; Stamnes, Jakob J. (Peer reviewed; Journal article, 2016-09)We present data from measurements and analyses of the spectral absorption due to colored dissolved organic matter (CDOM), total suspended matter (TSM), phytoplankton, and non-algal particles (NAP) in high-latitude northern ... -
Analysis of Ozone (O3) and Erythemal UV (EUV) measured by TOMS in the equatorial African belt
Ssenyonga, Taddeo; Stamnes, Jakob J.; Dahlback, Arne; Steigen, Andreas L; Okullo, Willy; Frette, Øyvind (Peer reviewed; Journal article, 2010-01-19)We presented time series of total ozone column amounts (TOCAs) and erythemal UV (EUV) doses derived from measurements by TOMS (Total Ozone Mapping Spectrometer) instruments on board the Nimbus-7 (N7) and the Earth Probe ... -
CDOM absorption properties of natural water bodies along extreme environmental gradients
Nima, Ciren; Frette, Øyvind; Hamre, Børge; Stamnes, Jakob J.; Chen, Yi-Chun; Sørensen, Kai; Norli, Marit; Lu, Daren; Xing, Qianguo; Muyimbwa, Dennis; Ssenyonga, Taddeo; Stamnes, Knut; Erga, Svein Rune (Peer reviewed; Journal article, 2019-09-24)We present absorption properties of colored dissolved organic matter (CDOM) sampled in six different water bodies along extreme altitudinal, latitudinal, and trophic state gradients. Three sites are in Norway: the mesotrophic ... -
Chlorophyll a fluorescence lifetime reveals reversible UV-induced photosynthetic activity in the green algae Tetraselmis
Kristoffersen, Arne Skodvin; Hamre, Børge; Frette, Øyvind; Erga, Svein Rune (Peer reviewed; Journal article, 2015)The fluorescence lifetime is a very useful parameter for investigating biological materials on the molecular level as it is mostly independent of the fluorophore concentration. The green alga Tetraselmis blooms in summer, ... -
Eco-friendly Egyptian blue (CaCuSi4O10) dye for luminescent solar concentrator applications
Rajaramanan, Tharmakularasa; Keykhaei, Mansoureh; Gourji, Fatemeh Heidari; Ravirajan, Punniamoorthy; Senthilnanthanan, Meena; Frette, Øyvind; Velauthapillai, Dhayalan (Journal article; Peer reviewed, 2023)This study focuses on synthesizing the heavy metal-free ancient Egyptian blue (EB; CaCuSi4O10) dye using a facile ceramic method for luminescent solar concentrator (LSC) application. XRD, SEM and EDX results confirmed that ... -
Influence of Acetone and Sodium Chloride Additives on Cooling Efficiency of Water Droplets Impinging onto Hot Metal Surfaces
Bjørge, Joachim Søreng; Bjørkheim, Svein Arne; Log, Maria-Monika Metallinou; Log, Torgrim; Frette, Øyvind (Peer reviewed; Journal article, 2019-06-19)In the present work, the cooling efficiency of water droplets falling onto hot aluminum and stainless steel discs from heights of 12.5 cm, 25 cm, 50 cm and 100 cm, corresponding to speeds of 1.5 m/s, 2.2 m/s, 3.1 m/s and ... -
Method for measuring cooling efficiency ofwater droplets impinging onto hot metal discs
Bjørge, Joachim Søreng; Metallinou, Maria-Monika; Log, Torgrim; Frette, Øyvind (Peer reviewed; Journal article, 2018-06-09)The present work outlines a method for measuring the cooling efficiency of droplets impinging onto hot metal discs in the temperature range of 85 °C to 400 °C, i.e., covering the boiling regimes experienced when applying ... -
Mueller matrix measurements and modeling pertaining to Spectralon white reflectance standards
Svensen, Øyvind; Kildemo, Morten; Jerome, Maria; Stamnes, Jakob J.; Frette, Øyvind (Peer reviewed; Journal article, 2012)The full Mueller matrix for a Spectralon white reflectance standard was measured in the incidence plane, to obtain the polarization state of the scattered light for different angles of illumination. The experimental setup ... -
A new algorithm for simultaneous retrieval of aerosol and marine parameters in coastal environments
Stamnes, Knut; Li, Wei; Fan, Y.; Hamre, Børge; Frette, Øyvind; Folkestad, Are; Sørensen, Kai; Stamnes, Jakob J. (Peer reviewed; Journal article, 2013)We present simultaneous retrievals of aerosol and marine parameters in coastal areas from ocean color data using the OC-SMART algorithm, Ocean Color: Simultaneous Marine and Aerosol Retrieval Tool. OC-SMART uses a one-step ... -
A new algorithm for simultaneous retrieval of aerosols and marine parameters
Ssenyonga, Taddeo; Frette, Øyvind; Hamre, Børge; Stamnes, Knut; Muyimbwa, Dennis; Ssebiyonga, Nicolausi; Stamnes, Jakob J. (Journal article; Peer reviewed, 2022)We present an algorithm for simultaneous retrieval of aerosol and marine parameters in coastal waters. The algorithm is based on a radiative transfer forward model for a coupled atmosphere-ocean system, which is used to ... -
Testing Fluorescence Lifetime Standards using Two-Photon Excitation and Time-Domain Instrumentation: Fluorescein, Quinine Sulfate and Green Fluorescent Protein
Kristoffersen, Arne Skodvin; Hamre, Børge; Erga, Svein Rune; Frette, Øyvind (Peer reviewed; Journal article, 2018-09)It is essential for everyone working with experimental science to be certain that their instruments produce reliable results, and for fluorescence lifetime experiments, information about fluorescence lifetime standards is ... -
Testing Fluorescence Lifetime Standards using Two-Photon Excitation and Time-Domain Instrumentation: Rhodamine B, Coumarin 6 and Lucifer Yellow
Kristoffersen, Arne Skodvin; Hamre, Børge; Erga, Svein Rune; Frette, Øyvind (Peer reviewed; Journal article, 2014-05-28)Having good information about fluorescence lifetime standards is essential for anyone performing lifetime experiments. Using lifetime standards in fluorescence spectroscopy is often regarded as a straightforward process, ...