Elevated Mixed Layers and Associated Severe Thunderstorm Environments in South and North America

A severe thunderstorm climatology for Australia and associated thunderstorm environments

Severe thunderstorm and tornado warnings in Europe

Article history: Received 7 December 2007 Received in revised form 29 August 2008 Accepted 20 September 2008 This study summarizes the current severe thunderstorm warning and forecast operations in different European National Hydro-Meteorological Services (NHMSs), and, in doing so, suggests ways for countries developing their own warning service to learn from experiences in other countries, as ...

Helicobacter pylori in North and South America before Columbus.

We present a molecular epidemiologic study, based on an analysis of vacA, cagA and cag right end junction genotypes from 1042 Helicobacter pylori isolates, suggesting that H. pylori was present in the New World before Columbus. Eight Native Colombian and Alaskan strains possessed novel vacA and/or cagA gene structures and were more closely related to East Asian than to non-Asian H. pylori. Some...

The GMO experience in North and South America

This paper surveys the level and distribution of economic impacts of GMOs in the Americas from 1996–2004. Key institutional factors influencing GMO diffusion are discussed. In 2004 the Americas accounted for 94%, of world GMO area. Diffusion has been concentrated; four countries, four crops and two traits account for the vast majority of area. The economic benefits of the diffusion of GMOs have...

Severe convection and lightning in subtropical South America

Satellite radar and radiometer data show that subtropical South America has the world’s deepest convective storms, robust mesoscale convective systems, and very frequent large hail. We determine severe weather characteristics for the most intense precipitation features seen by satellite in this region. In summer, hail and lightning concentrate over the foothills of western Argentina. Lightning ...