Lidar Observations of Low-level Wind Reversals over the Gulf of Lion and Characterization of Their Impact on the Water Vapour Variability

Autor: Di Girolamo Paolo, Flamant Cyrille, Cacciani Marco, Summa Donato, Stelitano Dario, Mancini Ignazio, Richard Evelyne, Ducrocq Véronique, Nuret Mathieu, Said Frédérique
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: EPJ Web of Conferences, Vol 119, p 15002 (2016)
Druh dokumentu: article
ISSN: 2100-014X
DOI: 10.1051/epjconf/201611915002
Popis: Water vapour measurements from a ground-based Raman lidar and an airborne differential absorption lidar, complemented by high resolution numerical simulations from two mesoscale models (Arome-WMED and MESO-NH), are considered to investigate transition events from Mistral/Tramontane to southerly marine flow taking place over the Gulf of Lion in Southern France in the time frame September-October 2012, during the Hydrological Cycle in the Mediterranean Experiment (HyMeX) Special Observation Period 1 (SOP1). Low-level wind reversals associated with these transitions are found to have a strong impact on water vapour transport, leading to a large variability of the water vapour vertical and horizontal distribution. The high spatial and temporal resolution of the lidar data allow to monitor the time evolution of the three-dimensional water vapour field during these transitions from predominantly northerly Mistral/Tramontane flow to a predominantly southerly flow, allowing to identify the quite sharp separation between these flows, which is also quite well captured by the mesoscale models.
Databáze: Directory of Open Access Journals