%0 Journal Article %T Measurements of the water vapor continuum absorption by OFCEAS at 3.50 µm and 2.32 µm %+ LAsers, Molécules et Environnement (LAME-LIPhy ) %+ Institut des Géosciences de l’Environnement (IGE) %+ Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères] (LIPhy ) %A Fleurbaey, H %A Grilli, R %A Mondelain, Didier %A Campargue, A %< avec comité de lecture %@ 0022-4073 %J Journal of Quantitative Spectroscopy and Radiative Transfer %I Elsevier %V 278 %P 108004 %8 2022 %D 2022 %R 10.1016/j.jqsrt.2021.108004 %K Water vapor %K continuum absorption %K MT_CKD model %K OFCEAS %K transparency window %K atmosphere %Z Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] %Z Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph]Journal articles %X Measurements of the water vapor absorption cross-sections at two spectral points of the 2.1 μm and 4.0 μm transparency windows are performed by optical feedback cavity enhanced absorption spectroscopy (OFCEAS). The self-continuum cross-section, C S , is measured for temperature values of 30 and 47 °C (303 and 320 K) at the 2853 cm −1 spectral point, corresponding to the lowest opacity region of the 4.0 μm transparency window. The C S values derived from the pressure squared dependence of the self-continuum, are found consistent with previous CEAS measurements in the considered window but significantly smaller than measurements by Fourier transform spectroscopy (FTS). The C S temperature dependence is discussed in relation with FTS measurements at high temperature. Foreign-continuum cross-sections, C F , are newly obtained from OFCEAS spectra of moist air in flow regime at the 4302 cm −1 spectral point of the low energy edge of the 2.1 μm window. After subtraction of the monomer and self-continuum contributions, C F values are derived from the linear variation of the foreign-continuum absorption with the product of the water vapor and air partial pressures. The measurements were performed for temperature values of 34 and 47 °C (307 and 320 K) and no significant temperature dependency was observed. The present C F value at 4302 cm −1 is gathered with previous CEAS measurements at seven spectral points of the 2.1 μm window. This consistent set of C F values is used to derive from a polynomial fit, the empirical frequency dependence of C F (ν) over the 4250-50 0 0 cm −1 range. Overall, the semi-empirical MT_CKD_3.5 values of C F are significantly underestimated in the centre of the considered window. %G English %2 https://hal.science/hal-03854932/document %2 https://hal.science/hal-03854932/file/15th%20Oct_submitted.pdf %L hal-03854932 %U https://hal.science/hal-03854932 %~ IRD %~ INSU %~ UGA %~ CNRS %~ INPG %~ OSUG %~ LIPHY %~ IGE %~ UGA-EPE %~ ANR