Droughts in the Southern Great Plains (SGP) have been attributed to the cold phase of El Niño–Southern Oscillation or La Niña. While La Niña events have been clearly linked to winter droughts, their link to summer droughts has remained unclear. We analyze the difference in precipitation between dry and nondry summers over the SGP during La Niña years. Anomalously high geopotential height and su...

[1] Results are presented from a survey of cold ion observations in the near-Earth magnetotail using data from the Polar Thermal Ion Dynamics Experiment (TIDE). During the interval from July to December of 2001, Polar had its apogee ( 9.5 RE) near the equatorial plane in the tail region of the magnetosphere. It is shown that a lobal wind is ubiquitous in the inner tail, with low-energy (<300 eV...

Recent studies of the genetic structure of stream-dwelling organisms have suggested that ®ne-scale patterns are the consequence of patchy recruitment from a small number of matings and limited in-stream dispersal. Predictions of this hypothesis were tested by spatial and temporal analysis of the genetic structure of populations of a stream may ̄y (Bungona sp.: Baetidae) in subtropical streams in...

Fabry-Perot interferometer (FPI) measurements of thermospheric temperatures from the Doppler widths of the OI 630 nm nightglow emission line have been carried out at Cachoeira Paulista (23◦ S, 45◦ W, 16◦ S dip latitude), Brazil. The east-west components of the thermospheric temperatures obtained on 73 nights during the period from 1988 to 1992, primarily under quiet geomagnetic conditions, were...