caa a22 4500 469084200 CHVBK 20180323133000.0 cr unu---uuuuu 170328e19920201xx s 000 0 eng 10.1007/BF02656926 doi (NATIONALLICENCE)springer-10.1007/BF02656926 A fluid experiment of large-scale topography effect on baroclinic wave flows [Elektronische Daten] [Guoqing Li, Robin Kung, Richard Pfeffer] The effects of topography on baroclinic wave flows are studied experimentally in a thermally driven rotating annulus of fluid. Fourier analysis and complex principal component (CPC) analysis of the experimental data show that, due to topographic forcing, the flow is bimodal rather than a single mode. Under suitable imposed experimental parameters, near thermal Rossby numberR OT =0.1 and Taylor numberT a = 2.2 × 107, the large-scale topography produces low-frequency oscillation in the flow and rather long-lived flow pattern resembling blocking in the atmospheric cir-culation. The ‘blocking' phenomenon is caused by the resonance of travelling waves and the quasi-stationary waves forced by topography. The large-scale topography transforms wavenumber-homogeneous flows into wavenumber-dispersed flows, and the dispersed flows possess lower wavenumbers. Advances in Atmospheric Sciences, 1992 Li Guoqing Institute of Atmospheric Physics, Academia Sinica, Beijing, China aut Kung Robin Geophysical Fluid Dynamics Institute, Florida State University, Tallahassee, Florida, USA aut Pfeffer Richard Geophysical Fluid Dynamics Institute and Department of Meteorology, Florida State University, Tallahassee, Florida, USA aut Advances in Atmospheric Sciences Science Press 9/1(1992-02-01), 17-28 0256-1530 9:1<17 1992 9 376 https://doi.org/10.1007/BF02656926 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02656926 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Guoqing Institute of Atmospheric Physics, Academia Sinica, Beijing, China aut NATIONALLICENCE 700 1- Kung Robin Geophysical Fluid Dynamics Institute, Florida State University, Tallahassee, Florida, USA aut NATIONALLICENCE 700 1- Pfeffer Richard Geophysical Fluid Dynamics Institute and Department of Meteorology, Florida State University, Tallahassee, Florida, USA aut NATIONALLICENCE 773 0- Advances in Atmospheric Sciences Science Press 9/1(1992-02-01), 17-28 0256-1530 9:1<17 1992 9 376 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer