title: Tidal effects on stratospheric temperature series derived from successive advanced microwave sounding units.
abstract: Stratospheric temperature series derived from the Advanced Microwave Sounding Unit (AMSU) on board successive NOAA satellites reveal, during periods of overlap, some bias and drifts. Part of the reason for these discrepancies could be atmospheric tides as the orbits of these satellites drifted, inducing large changes in the actual times of measurement. NOAA 15 and 16, which exhibit a long period of overlap, allow deriving diurnal tides that can correct such temperature drifts. The characteristics of the derived diurnal tides during summer periods is in good agreement with those calculated with the Global Scale Wave Model, indicating that most of the observed drifts are likely due to the atmospheric tides. Cooling can be biased by a factor of 2, if times of measurement are not considered. When diurnal tides are considered, trends derived from temperature lidar series are in good agreement with AMSU series. Future adjustments of temperature time series based on successive AMSU instruments will require considering corrections associated with the local times of measurement.
authors: Laboratoire Atmosphères, Milieux, Observations Spatiales, CNRS UMR 8190, Université de Versailles Saint-Quentin Guyancourt, France.
authors: P
authors: P
authors: Keckhut
authors: Laboratoire Atmosphères, Milieux, Observations Spatiales, CNRS UMR 8190, Université de Versailles Saint-Quentin Guyancourt, France ; LETG-Rennes COSTEL, CNRS UMR 6554, Université Rennes 2 Rennes, France ; Laboratoire de Météorologie Dynamique, CNRS UMR 8539, IPSL, Ecole Polytechnique Palaiseau, France.
authors: B M
authors: BM
authors: Funatsu
authors: Laboratoire de Météorologie Dynamique, CNRS UMR 8539, IPSL, Ecole Polytechnique Palaiseau, France.
authors: C
authors: C
authors: Claud
authors: Laboratoire Atmosphères, Milieux, Observations Spatiales, CNRS UMR 8190, Université de Versailles Saint-Quentin Guyancourt, France.
authors: A
authors: A
authors: Hauchecorne
keywords: satellite; stratosphere; temperature; tides