Abstract This paper documents an increase in the number of observed explosive cyclones (EC) at King George Island, South Shetland Islands, Antarctica, over the 1989‒2020 period. In ECs at 60o latitudes the surface atmospheric pressure drops ≥24 hPA in 24 hours. The annual EC frequency time series shows a significant positive trend of ~2.7 cyclones/decade, with a break in 2003 and average numbers of 7.3 and 11.8 events before and after that break, respectively. The increase follows closely earlier documented global sea surface temperature (SST) anomaly trends for the 1981‒2018 period, partially attributed to global warming and to the Pacific Decadal Oscillation (PDO). Connections between EC frequency and SST might occur through variations in SST in the southeastern Pacific and southwestern Atlantic, with anomalous cold conditions favoring an increase in ECs. We also found close relations between the number of ECs with simultaneous occurrences of PDO and Atlantic multidecadal oscillation in opposite phases, so that after 2003 they were in the cold and warm phases, respectively, and vice-versa before 2003. Both low-frequency modes seem to modulate the number of ECs. As per the authors knowledge these results have not been discussed before and may help climate modeling studies and weather forecasts.

Este trabalho tem por objetivo relatar, a partir da reflexão e posição de vários autores, a nova fase que se constata no ensino da Geografia, associada ao desafio do uso de novas tecnologias. Esta situação caracteriza um momento no qual se observa professores e alunos caminhando muitas vezes lado a lado na busca do conhecimento. A informática, no Brasil, para muitos professores ainda é uma ferramenta pouco conhecida de trabalho, que lhes causa medo e distância; já para os alunos, contemporâneos da informática, não existem mistérios e receios. Desta forma, cabe ao setor da educação criar as condições cada vez mais favoráveis para que professores e alunos tirem proveito das novas tecnologias em favor do ensino e da aprendizagem.

L'objectif de ce travail était de rapporter une nouvelle étape dans l'enseignement de la Géographie, associée à l'utilisation de nouvelles technologies numériques. Il s´agit d´une situation où les professeurs et les étudiants marchent côte à côte pour l'accès à la connaissance. Les outils informatiques, pour beaucoup de professeurs au Brésil, sont encore une option peu connue, qui sucitent des craintes et distances. Pour les élèves, contemporains des applications informatiques, de telles nouvelles options ne posent pas de mystères et ils ne les redoutent pas. Par conséquent, il est de la responsabilité du secteur de l'éducation de créer des conditions appropriées pour que les professeurs et les étudiants tirent bénéfice des nouvelles technologies pour stimuler l'éducation et l'étude.

The objective of this work was to report a new stage that is taking place in Geography education, associated to the use of new digital technologies, as perceived in the current literature. This situation characterizes a condition where teachers and students walk side by side towards knowledge access. For many teachers in Brazil, computer tools are still a little known option of work, that causes fear and distance; for the pupils, that are contemporaries of computer applications, such new options do not constitute mysteries and dreads. Therefore, it is the education sector responsibility to create the suitable conditions so that teachers and students benefit from the new technologies to foster education and learning.