Report on the Joint workshop on uncertainties at 183GHz

Abstract : A two day workshop was held 29-30 June 2015, in Paris, to discuss biases observed between measurements at 183GHz and calculations using different radiative transfer models and using either radiosondes (RAOBS) or short range forecasts from Numerical Weather Prediction (NWP) systems. There were three main objectives of the workshop: firstly to describe the biases, trying to separate those biases which were common to all approaches from those which may have been a result of a particular methodology; secondly to identify and, where possible, quantify uncertainty in every component of the comparison; and lastly, where possible to begin the process of attribution of the biases, which could in due course lead to their elimination. In order to address these ambitious goals, experts in many different aspects were assembled. This included specialists in RAOBS calibration, NWP models and data assimilation, instrument biases and radiative transfer models, both the models themselves and the underlying spectroscopy. Comparisons were also undertaken with other techniques for sensing humidity information such as Global Navigation Satellite Systems (GNSS), Differential Absorption Lidar (DIAL), Raman lidar and infrared (IR) radiances. The workshop was built around overview presentations and working group discussions, which triggered intense and valuable discussions.
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Submitted on : Friday, October 9, 2015 - 11:26:21 AM
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Hélène Brogniez, Stephen English, Jean-Francois Mahfouf. Report on the Joint workshop on uncertainties at 183GHz. [Research Report] LATMOS; ECMWF; Météo-France. 2015. ⟨hal-01213862⟩

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