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Abstract:

Atmospheric gravity waves (GW) serve as an essential mechanism in the transport of energy and momentum flux from the low to the upper atmosphere. In the last decades satellite observations have become an important part in the analysis of GW due to their global and frequent coverage. Present procedures often provide GW absolute momentum flux (MF), ambiguous 3-D propagation direction, and apparent vertical wavelengths. We here introduce a method with close sounding quartets, which allows the calculation for GW of the net MF, the definite propagation direction, and “real” wavelengths. Among the satellite observational techniques, Global Positioning System (GPS) radio occultation (RO) retrievals provide temperature profiles that after adequate processing may yield GW properties like wavelengths, MF, and energy. Our procedure is illustrated by an example under requirements that tend to ensure that four GPS RO soundings are observing the same GW. The future increase of satellite measuring devices due to new missions (including GPS RO) will lead to a higher spatial and temporal density of profiles that may eventually allow the attainment of GW climatologies of net MF, propagation direction, and “real” vertical wavelengths. © 2018. The Authors.

Registro:

Documento: Artículo
Título:A Method to Determine Gravity Wave Net Momentum Flux, Propagation Direction, and “Real” Wavelengths: A GPS Radio Occultations Soundings Case Study
Autor:Alexander, P.; Schmidt, T.; de la Torre, A.
Filiación:Instituto de Física de Buenos Aires, CONICET, Ciudad Universitaria Pabellón 1, Buenos Aires, Argentina
Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany
LIDTUA, Facultad de Ingeniería, Universidad Austral and CONICET, Buenos Aires, Argentina
Palabras clave:gravity waves; momentum flux; real wavelengths; flux measurement; GPS; gravity wave; instrumentation; numerical method; radio; temperature effect; temperature profile; upper atmosphere; wave direction; wave propagation; wavelength
Año:2018
Volumen:5
Número:6
Página de inicio:222
Página de fin:230
DOI: http://dx.doi.org/10.1002/2017EA000342
Título revista:Earth and Space Science
Título revista abreviado:Earth Space Sci.
ISSN:23335084
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_23335084_v5_n6_p222_Alexander

Referencias:

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Citas:

---------- APA ----------
Alexander, P., Schmidt, T. & de la Torre, A. (2018) . A Method to Determine Gravity Wave Net Momentum Flux, Propagation Direction, and “Real” Wavelengths: A GPS Radio Occultations Soundings Case Study. Earth and Space Science, 5(6), 222-230.
http://dx.doi.org/10.1002/2017EA000342
---------- CHICAGO ----------
Alexander, P., Schmidt, T., de la Torre, A. "A Method to Determine Gravity Wave Net Momentum Flux, Propagation Direction, and “Real” Wavelengths: A GPS Radio Occultations Soundings Case Study" . Earth and Space Science 5, no. 6 (2018) : 222-230.
http://dx.doi.org/10.1002/2017EA000342
---------- MLA ----------
Alexander, P., Schmidt, T., de la Torre, A. "A Method to Determine Gravity Wave Net Momentum Flux, Propagation Direction, and “Real” Wavelengths: A GPS Radio Occultations Soundings Case Study" . Earth and Space Science, vol. 5, no. 6, 2018, pp. 222-230.
http://dx.doi.org/10.1002/2017EA000342
---------- VANCOUVER ----------
Alexander, P., Schmidt, T., de la Torre, A. A Method to Determine Gravity Wave Net Momentum Flux, Propagation Direction, and “Real” Wavelengths: A GPS Radio Occultations Soundings Case Study. Earth Space Sci. 2018;5(6):222-230.
http://dx.doi.org/10.1002/2017EA000342