Surface inversion characteristics in the nocturnal boundary layer of Guadeloupe and its impact on air quality
| Autor: | Sandra Jacoby-Koaly, Jack Molinié, Thomas Plocoste, F. Bade |
|---|---|
| Přispěvatelé: | Laboratoire d'aérologie (LAERO), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées |
| Rok vydání: | 2015 |
| Předmět: |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere Convection 010504 meteorology & atmospheric sciences Radiative cooling Inversion (meteorology) 010501 environmental sciences Sunset Atmospheric sciences 01 natural sciences Depth sounding 13. Climate action Environmental science Sunrise Air quality index ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences Morning |
| Zdroj: | AIR POLLUTION 2015 AIR POLLUTION 2015, Jun 2015, València, France. ⟨10.2495/AIR150221⟩ |
| ISSN: | 1743-3541 1746-448X |
| DOI: | 10.2495/air150221 |
| Popis: | Dispersion of pollutants in the atmosphere strongly depends on its stability. In nocturnal stable conditions, occurrence of a surface thermal inversion can trap air pollutants near the ground. Such inversion develops after sunset consecutively to radiative cooling of the ground and is dissolved by convection in the morning. In literature, few studies deal with this phenomenon in the tropics. Through measurements carried out in Guadeloupe, we study the inversion depth and intensity from Meteo France (MF) soundings at 7 am (11 UTC) in 2011 and 2012. We are also concerned here with its impact on air pollutants concentrations. We detect more cases of surface inversion at the beginning and at the end of the year. Annual global radiation and time of sunrise evolutions are key parameters for understanding its detection on MF soundings at 7 am. We find a surface inversion with average height of 121 m and average intensity of 1.8°C. When the night inversion is still visible on the early morning temperature sounding, simultaneous pollutants primary measurements always show higher concentrations. At sounding time we get on average, 23.3 µg.m -3 of NO concentration with inversion and 11.8 µg.m -3 without. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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