Middle-atmospheric zonal and meridional wind profiles from polar, tropical and mid latitudes with the ground-based microwave Doppler wind radiometer WIRA R. Rüfenacht, A. Murk, N. Kämpfer, P. Eriksson, and S. A. Buehler Institute of Applied Physics, University of Bern, Bern, Switzerland Department of Earth and Space Sciences, Chalmers University of Technology, Gothenburg, Sweden Division of Spa...

We consider the zonal mean circulation on an equatorial &plane and obtain analytic solutions for small-amplitude disturbances in response to sources of heat and momentum. The effect of dissipation is roughly approximated by using assumed constant drag and radiative damping terms. We apply the model to the tropospheric zonal winds, temperatures, and meridional circulation to give simple insights...

[1] Abstract: The density structure along the ocean margins carries an integrated imprint of ocean circulation. The difference in pressure between the eastern and western margins of the ocean reflects the net meridional geostrophic transport across the ocean basin. If one assumes that the wind driven circulation is closed in the upper ocean, the wind driven component of the net geostrophic tran...

Different measures of wind influence the ocean in different ways. In particular, the time-averaged mixed layer turbulent energy production rate is proportional to !u *", where u* is the “oceanic friction velocity” that is based on wind stress. Estimating !u *" from monthly averages of wind stress or wind speed may introduce large biases due to the day-to-day variability of the direction and mag...

Four years of ocean vector wind data are used to evaluate statistics of wind stress over the ocean. Raw swath wind stresses derived from the Quick Scatterometer (QuikSCAT) are compared with five different global gridded wind products, including products based on scatterometer observations, meteorological analysis winds from the European Centre for Medium-Range Weather Forecasts, and reanalysis ...

We present the first high-resolution (sub-annual) dust particle data set from West Antarctica, developed from the West Antarctic Ice Sheet (WAIS) Divide deep ice core (79.468 S, 112.086 W), and use it to reconstruct changes in atmospheric circulation over the past 2400 years. We find a background dust flux of ∼ 4 mg m−2 year−1 and a mode particle size of 5–8 μm diameter. Through comparing the W...

Hurricane and tropical storm statistics verify the modulation of eastern Pacific tropical systems by the Madden– Julian oscillation (MJO) as hypothesized by Maloney and Hartmann. Over twice as many named tropical systems (hurricanes and tropical storms) accompany equatorial 850-mb westerly anomalies than accompany equatorial easterly anomalies, and the systems that do exist are stronger. Hurric...

Intraseasonal fluctuations of the large scale divergent circulation of the tropical troposphere during the one year period December 1, 1978 November 30, 1979 are examined using analyses prepared by the European Centre for Medium Range Weather Forecasts (ECMWF). It is demonstrated through a number of empirical orthogonal function (EOF) analyses that highly coherent, equatorially symmetric fluctu...

During the years 1899-1967, in temperate latitudes of the Northern Hemisphere, there has been a significant quasi-periodic fluctuation (hereafter denoted as periodicity) of about 16 yr. in the even minus odd (even-odd) year difference in sea level zonal geostrophic wind for the months January through May. No such periodicity is evident for the months July through November. For the winter and sp...