Articles | Volume 17, issue 9
https://doi.org/10.5194/gmd-17-3783-2024
https://doi.org/10.5194/gmd-17-3783-2024
Development and technical paper
 | 
13 May 2024
Development and technical paper |  | 13 May 2024

Balloon drift estimation and improved position estimates for radiosondes

Ulrich Voggenberger, Leopold Haimberger, Federico Ambrogi, and Paul Poli

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Cited articles

Aberson, S. D., Sellwood, K. J., and Leighton, P. A.: Calculating Dropwindsonde Location and Time from TEMP-DROP Messages for Accurate Assimilation and Analysis, J. Atmos. Ocean. Techn., 34, 1673–1678, https://doi.org/10.1175/jtech-d-17-0023.1, 2017. 
Alexander, P. and de La Torre, A.: Uncertainties in the measurement of the atmospheric velocity due to balloon-gondola pendulum-like motions, Adv. Space Res., 47, 736–739, https://doi.org/10.1016/j.asr.2010.09.020, 2011. 
Choi, Y., Ha, J., and Lim, G.: Investigation of the Effects of Considering Balloon Drift Information on Radiosonde Data Assimilation Using the Four-Dimensional Variational Method, Weather Forecast., 30, 809–826, https://doi.org/10.1175/WAF-D-14-00161.1, 2015. 
Copernicus Climate Change Service, Climate Data Store: In situ atmospheric harmonized temperature, relative humidity and wind from 1978 onward from baseline radiosonde networks, Copernicus Climate Change Service (C3S) Climate Data Store (CDS) [data set], https://doi.org/10.24381/cds.f101d0bf, 2021. 
Crutcher, H. L.: Distribution of radiosonde errors, NOAA Tech. Rep. Environmental Data and Information Service (EDIS), 32, U.S. Department Of Commerce, National Oceanic and Atmospheric Administration, https://repository.library.noaa.gov/view/noaa/30830/noaa_30830_DS1.pdf (last access: 7 May 2024), 1979. 
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Short summary
This paper presents a method for calculating balloon drift from historical radiosonde ascent data. The drift can reach distances of several hundred kilometres and is often neglected. Verification shows the beneficial impact of the more accurate balloon position on model assimilation. The method is not limited to radiosondes but would also work for dropsondes, ozonesondes, or any other in situ sonde carried by the wind in the pre-GNSS era, provided the necessary information is available.
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