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First 2053 results for ” Mark ter; Geffen”

  1. Improved slant column density retrieval of nitrogen dioxide and formaldehyde for OMI and GOME-2A from QA4ECV: intercomparison, uncertainty characterisation, and trends

    Nitrogen dioxide (NO2) and formaldehyde (HCHO) column data from satellite instruments are used fo...

    M Zara, KF Boersma, I De Smedt, A Richter, E Peters, JHG van Geffen, S Beirle, T Wagner, M Van Roozendael, S Marchenko, LN Lamsal, HJ Eskes | Status: published | Journal: Atmospheric Measurement Techniques | Volume: 11 | Year: 2018 | First page: 4033 | Last page: 4058 | doi: https://doi.org/10.5194/amt-11-4033-2018

    Publication

  2. Sunshine is an important determinant of vitamin D status even among high-dose supplement users: secondary analysis of a randomised controlled trial in Crohn's disease patients

    Sunshine is considered to be the most important source of vitamin D. Due to an increased risk of ...

    F O'Sullivan, T Raftery, M van Weele, J van Geffen, D McNamara, C O'Morain, N Mahmud, D Kelly, M Healy, M O'Sullivan, L Zgaga | Status: published | Journal: Photochem. and Photobiol. | Volume: 95 | Year: 2019 | First page: 1060 | Last page: 1067 | doi: 10.1111/php.13086

    Publication

  3. Comprehensive Analysis of Seasonal and Geographical Variation in UVB Radiation Relevant for Vitamin D Production in Europe

    Dermal synthesis, following sun exposure, is the main source of vitamin D. This study characteriz...

    Khanna T, Shraim R, Zarkovic M, van Weele M, van Geffen J, Zgaga L. | Journal: Nutrients | Volume: 14 | Year: 2022 | First page: 5189 | Last page: 5204 | doi: 10.3390/nu14235189

    Publication

  4. Shipborne MAX-DOAS measurements for validation of TROPOMI NO2 products

    P Wang, A Piters, J Van Geffen, O Tuinder, P Stammes, S Kinne | Status: published | Journal: Atmospheric Measurement Techniques | Year: 2020 | doi: 10.5194/amt-13-1413-2020

    Publication

  5. S5P TROPOMI NO2 slant column retrieval: method, stability, uncertainties and comparisons with OMI

    The Tropospheric Monitoring Instrument (TROPOMI), aboard the Sentinel-5 Precursor (S5P) satellite...

    JHG van Geffen, KF Boersma, HJ Eskes, MC Sneep, M ter Linden, JP Veefkind | Status: published | Journal: Atmospheric Measurement Techniques | Volume: 13 | Year: 2020 | First page: 1315 | Last page: 1335 | doi: 10.5194/amt-13-1315-2020

    Publication