HR: 1400h
AN: SA53B-05    [Abstracts]
TI: The CAWSES Global Observing Campaign on Tides: Current Status
AU: * Ward, W E
EM: wward@unb.ca
AF: Dept of Physics, University of New Brunswick, P.O. Box 4400, Fredericton, NB E3B 5A3, Canada
AU: Gerding, M
EM: gerding@iap-kborn.de
AF: Leibniz-Institute of Atmospheric Physics, Leibniz-Institute of Atmospheric Physics, Kuhlungsborn, Germany
AU: Goncharenko, L
EM: lpg@haystack.mit.edu
AF: MIT Haystack Observatory, Route 40, Westford, MA 01886, United States
AU: Keckhut, P
EM: Philippe.Keckhut@aerov.jussieu.fr
AF: Service d'Aéronomie, Institut Pierre et Simon Laplace, Verrière-le-Buisson, France
AU: Marsh, D
EM: marsh@ucar.edu
AF: Atmospheric Chemistry Division, NCAR, P.O. Box 3000, Boulder, CO 80307-3000, United States
AU: Oberheide, J
EM: joberh@uni-wuppertal.de
AF: Physics Department, University of Wuppertal, Wuppertal, Germany
AU: Rao, D N
EM: profdnrao@nmrf.gov.in
AF: National Atmospheric Research Laboratory, P.B. No. 123, Tirupati, India
AU: Scheer, .
EM: jurgen@caerce.edu.ar
AF: Instituto de Astronomía y Física del Espacio, Consejo de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, Buonos Aires, Argentina
AU: Singer, W
EM: singer@iap-kborn.de
AF: Leibniz-Institute of Atmospheric Physics, Leibniz-Institute of Atmospheric Physics, Kuhlungsborn, Germany
AB: The CAWSES Global Tidal Campaign was initiated to encourage collaboration between satellite and ground based observations and to identify features in various observation types consistent with specific components. This project is one of several sponsored under Theme 3, Atmospheric Coupling Processes, of the international Climate and Weather of the Sun Earth System program (CAWSES, a SCOSTEP sponsored program). The overall goal of the campaign is to provide global data sets for several concentrated time periods over the next few years which includes coordinated ground-based and satellite measurements and modeling efforts. To unambiguously resolve the tidal components present in the Earth's atmosphere requires spatial and temporal sampling sufficient to resolve wavenumbers up to at least 5 and periods down to 4.8 hours every two to three days. Neither satellite or ground based observations on their own are capable of achieving these goals. Interpretation of tidal signatures in different observables (for example wind and temperature) is complicated by the fact the the associated latitudinal structures are typically different. A global network is required to allow these structures to be examined. Three campaign periods have been sceduled to date. The first tidal campaign took place from September 1 to October 31, 2005 and this year two campaigns, March 1 to April 31, and June 1 to August 15 are planned. The first of these latter campaigns will concentrate on the global tidal structures during equinox and their evolution and variability during this time period. The second of these campaigns will address the tidal structures during solstice conditions. Strong hemispheric asymmetries are know to develop in the structure of the migrating diurnal tide and it is of interest to determine the form of other components. These campaigns will allow the characterization of the heating sources, tidal components (migrating and nonmigrating), and tidal effects from the surface of the Earth to the ionosphere, and support and stimulate the use of models to simulate the conditions during these campaigns. Radar, microwave, optical, and ionospheric observations and satellite data are essential to the success of these campaigns and are now starting to be analysed. In this paper, we describe the organization of and motivation for this effort, plans for the incorporation of various observation types, and early results from the campaigns.
DE: 0341 Middle atmosphere: constituent transport and chemistry (3334)
DE: 3334 Middle atmosphere dynamics (0341, 0342)
DE: 3389 Tides and planetary waves
SC: SPA-Aeronomy [SA]
MN: 2007 Joint Assembly