EGU2020-6956, updated on 16 Oct 2020
https://doi.org/10.5194/egusphere-egu2020-6956
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

IWV retrieval from ground and shipborne GPS receivers during NAWDEX

Pierre Bosser1, Bock Olivier2, and Laurain Nicolas3
Pierre Bosser et al.
  • 1Lab-STICC, ENSTA Bretagne, Brest, France (pierre.bosser@ensta-bretagne.fr)
  • 2IPGP, IGN, Paris, France (bock@ipgp.fr)
  • 3ENSG, IGN, Marne-La-Vallée, France (nicolas.laurain@ensg.eu)

For the documentation of time and space variations of water vapor in atmosphere during the Nawdex campaign (North Atlantic, Autumn 2016), a ground network of more than 1200 coastal continuously operation reference GNSS stations has been analyzed. This network spreads from Caribbeans to Morocco through Greenland. Retrieved IWV have been used to evaluate ERAI and ERA5 reanalysis and highlight improvements made by ERA5 (-0.2 +/- 1.6 kg/m2 vs -0.3 +/- 2.1 kg/m2 overall). They are also used to describe high impact weather events that took place during the experiment.

The analysis of this ground GNSS network has been completed with the IWV retrieved from GPS data acquired by the French RV Atalante which cruises in the area during the experiment. IWV from shipborne receiver are consistent with both ERAI and ERA5 reanalysis (1.0 +/- 3.2 kg/m2 and 1.3 +/- 2.0 kg/m2 respectively) ; shipborne IWV also agree with IWV from nearby ground GNSS stations (-0.4 +/- 0.9 kg/m2). These results confirm the quality of shipborne IWV retrievals and opens up prospects for use in climatology and meteorology.

How to cite: Bosser, P., Olivier, B., and Nicolas, L.: IWV retrieval from ground and shipborne GPS receivers during NAWDEX, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-6956, https://doi.org/10.5194/egusphere-egu2020-6956, 2020

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