Articles | Volume 11, issue 6
Research article
19 Jun 2018
Research article |  | 19 Jun 2018

Orographic and convective gravity waves above the Alps and Andes Mountains during GPS radio occultation events – a case study

Rodrigo Hierro, Andrea K. Steiner, Alejandro de la Torre, Peter Alexander, Pablo Llamedo, and Pablo Cremades

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Cited articles

Alexander, M. J.: The gravity wave response above deep convection in a squall line simulation, J. Atmos. Sci., 52, 2212–2226, 1995. 
Alexander, P., de la Torre, A., and Llamedo, P.: The interpretation of gravity waves signatures extracted from GPS radio occultations, J. Geophys. Res., 113, D16117,, 2008. 
Alexander, P., de la Torre, A., Llamedo, P., Hierro, R., Schmidt, T., Haser, A., and Wickert, J.: A method to improve the determination of wave perturbations close to the tropopause by using a digital filter, Atmos. Meas. Tech., 4, 1777–1784,, 2011. 
Angerer, B., Ladstädter, F., Scherllin-Pirscher, B., Schwärz, M., Steiner, A. K., Foelsche, U., and Kirchengast, G.: Quality aspects of the Wegener Center multi-satellite GPS radio occultation record OPSv5.6, Atmos. Meas. Tech., 10, 4845–4863,, 2017. 
Barthlott, C., Corsmeier, U., Meißner, C., Braun, F., and Kottmeier, C.: The influence of mesoscale circulation systems on triggering convective cells over complex terrain, Atmos. Res., 81, 150–175, 2006. 
Short summary
This paper analyzed the collocated GPS radio occultation profiles near the convective systems identified from ISCCP over two orographic regions of the Alps and Andes. Gravity wave (GW) analysis over both selected regions was also carried out. The gravity wave signature from the two case studies were investigated using mesoscale WRF simulations, ERA-Interim reanalysis data, and measured RO temperature profiles. The absence of fronts or jets during both case studies reveals similar relevant GWs.