Multi-scale analysis of N 2 O, O 3 and HNO 3 high resolution measurements in the middle atmosphere

• Main Authors: Thiéblemont, Rémi, Huret, Nathalie, Dudok de Wit, Thierry, Catoire, Valéry, Aubry, Jason
• Other Authors: STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES), Université d'Orléans (UO)
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2013
• Subjects: [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]; [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; Arctic
• Online Access: https://insu.hal.science/insu-01552576

International audience Small-scale turbulent processes are still poorly understood and paramaterized in numerical models. The aim of this work is to evaluate the vertical turbulent diffusivity in the stratosphere and its variability as a function of altitude, latitude and season. To evaluate the turbulent diffusivity it is relevant to calculate tracer profiles roughness. Based on measurements obtained over the last decade by the SPIRALE spectrometer balloon borne instrument (9 flights), we calculate the profile roughness of N2O, HNO3 , and O3 in the stratosphere for different geophysical conditions and seasons at mid-latitudes, in tropics, and in polar region. SPIRALE is a spectrometer with six tunable laser diodes for in situ measurements of trace gas species from the upper troposphere to the middle stratosphere (∼34 km height). This instrument provides concentration of several trace gas species with a very high vertical resolution of ∼5 m. SPIRALE has flown in tropical region (Teresina, 5.0 • S/42.5 • W, Brasil), at mid-latitudes (Aire sur l'Adour, 43.5 • N/0.2 • W; Gap, 44.3 • N/6.0 • E, France) and in Arctic region (Esrange, 67.5 • N/21.0 • E). In addition, using the high vertical resolution of the measurements, we performed multi-scale analysis using wavelet decomposition in order to investigate the scale interactions and characterize the stratospheric dynamical state for each flight. We will show the preliminary results obtained and discuss on the link between roughness obtained and turbulent diffusion coefficient variability in the stratosphere.