Browsing Bergen Open Research Archive by Author "Stamnes, Jakob J."

Now showing items 1-11 of 11

    • 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 ...

    • Ground-based measurements of total ozone column amount with a multichannel moderate-bandwidth filter instrument at the Troll research station, Antarctica 

      Sztipanov, Milos; Tumeh, Lubna; Li, Wei; Svendby, Tove Marit; Kylling, Arve; Dahlback, Arne; Stamnes, Jakob J.; Hansen, Georg; Stamnes, Knut (Journal article; Peer reviewed, 2020)
      Combining information from several channels of the Norwegian Institute for Air Research (NILU-UV) irradiance meter, one may determine the total ozone column (TOC) amount. A NILU-UV instrument has been deployed and operated ...

    • Laser light propagation in a turbid medium: solution including multiple scattering effects 

      Stamnes, Knut; Li, Wei; Stamnes, Snorre; Hu, Yong; Zhou, Yingzhen; Chen, Nan; Fan, Yongzhen; Hamre, Børge; Lu, Xiaomei; Huang, Yuping; Weimer, Carl; Lee, Jennifer; Zeng, Xubin; Stamnes, Jakob J. (Journal article; Peer reviewed, 2023)
      We have shown that solutions to the radiative transfer equation for a homogeneous slab yield a zenith radiance reflectance that for collimated beam incidence in the nadir direction can be expressed in terms of the lidar ...

    • Machine Learning-Based Retrieval of Total Ozone Column Amount and Cloud Optical Depth from Irradiance Measurements 

      Sztipanov, Milos; Krizsán, Levente; Li, Wei; Stamnes, Jakob J.; Svendby, Tove Marit; Stamnes, Knut (Journal article; Peer reviewed, 2024)
      A machine learning algorithm combined with measurements obtained by a NILU-UV irradiance meter enables the determination of total ozone column (TOC) amount and cloud optical depth (COD). In the New York City area, a NILU-UV ...

    • Method for retrieval of aerosol optical depth from multichannel irradiance measurements 

      Sztipanov, Milos; Li, Wei; Dahlback, Arne; Stamnes, Jakob J.; Svendby, Tove Marit; Stamnes, Knut (Journal article; Peer reviewed, 2023)
      We present, to the best of our knowledge, a new method for retrieval of aerosol optical depth from multichannel irradiance measurements. A radiative transfer model is used to simulate measurements to create the new aerosol ...

    • 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 ...

    • Spectral albedo and transmittance of thin young Arctic sea ice 

      Taskjelle, Torbjørn; Hudson, Stephen R.; Granskog, Mats A.; Nicolaus, Marcel; Lei, Ruibo; Gerland, Sebastian; Stamnes, Jakob J.; Hamre, Børge (Peer reviewed; Journal article, 2016-01)
      Spectral albedo and transmittance in the range 400–900nm were measured on three separate dates on less than 15 cm thick new Arctic sea ice growing on Kongsfjorden, Svalbard at 78:9°N, 11:9°E. Inherent optical properties, ...