Abstract: A simplified scheme to generate vortex asymmetries due to the beta effect from an initially symmetric vortex on a beta plane is described. This approach, based on the time integration of the nondivergent barotropic vorticity ...

Abstract: The influence of Hurricane Gloria (1985) on the environment is investigated by comparing hurricane model integrations either including or excluding the hurricane in the initial condition. Results for three cases of Gloria ...

Abstract: Climatological annual and seasonal dewpoint, specific humidity, and relative humidity maps for the United States are presented using hourly data from 188 first-order weather stations for the period 1961?90. Separate ...

Abstract: Possible changes to the North American Atmospheric Observing System that are under discussion include the scheduling of radiosonde launches according to synoptic conditions. The authors estimate biases in long-term monthly ...

Abstract: Trends in tropospheric water vapor at Northern Hemisphere radiosonde stations are presented for two periods;1973?95 and 1958?95. Stations with incomplete or inhomogeneous temporal records were identified and excluded from ...

Abstract: Here 21 years of radiosonde observations from stations in the Western Hemisphere north of the equator were analyzed for trends in tropospheric water vapor. Mean fields of precipitable water and relative humidity at several ...

Abstract: Recent changes in the NWS upperair observing network are listed and an analysis is presented of the change in 1995 from VIZ to Vaisala radiosonde instruments. Results are shown for 14 stations at 850, 700, 500, 100, and ...

Abstract: A scheme is presented to improve the representation of a tropical cyclone in the initial condition of a high-resolution hurricane model. In the proposed method, a crudely resolved tropical cyclone in the large-scale analysis ...

Abstract: The U.S. National Weather Service has recently corrected an error in radiosonde humidity data reduction algorithms, eliminated a sonde thats processing contained another error, and recently made a further change in the ...

Abstract: Annual and seasonal correlations between temperature and both specific and relative humidity are presented based on radiosonde station data over the tropical Pacific Ocean and North America. Results are presented for the ...