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First 854 results for ” Jeff Polton”

1. 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

2. 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

3. A new separation methodology for the maritime sector emissions over the Mediterranean and Black Sea regions

   The aim of this paper is to apply a new lane separation methodology for the maritime sector emiss...

   Pseftogkas, A., Koukouli, M.-E., Skoulidou, I., Balis, D., Melati, C., Stavrakou, T., Falco, L., van Geffen, J., Eskes, H., Segers, A. and Manders, A. | Journal: Atmosphere | Volume: 12 | Year: 2021 | First page: 1478 | doi: 10.3390/atmos12111478

   Publication

4. Influence of convection on the upper-tropospheric O3 and NOx budget in southeastern China

   Thunderstorms can significantly influence the air composition via strong updraft and lightning ni...

   Zhang, X., Yin, Y., van der A, R., Eskes, H., van Geffen, J., Li, Y., Kuang, X., Lapierre, J. L., Chen, K., Zhen, Z., Hu, J., He, C., Chen, J., Shi, R., Zhang, J., Ye, X. and Chen, H. | Journal: Atmospheric Chemistry and Physics | Year: 2022 | doi: https://doi.org/10.5194/acp-22-5925-2022

   Publication

5. Evaluation of the LOTOS-EUROS NO2 simulations using ground-based measurements and S5P/TROPOMI observations over Greece

   The evaluation of chemical transport models, CTMs, is essential for the assessment of their perfo...

   Skoulidou, I., Koukouli, M.-E., Manders, A., Segers, A., Karagkiozidis, D., Gratsea, M., Balis, D., Bais, A., Gerasopoulos, E., Stavrakou, T., van Geffen, J., Eskes, H. and Richter, A | Journal: Atmospheric Chemistry and Physics | Volume: 21 | Year: 2021 | doi: https://doi.org/10.5194/acp-21-5269-2021

   Publication