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Search resuls for: "Norman Ratcliffe"


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Four out of five emperor penguin colonies in Antarctica’s Bellingshausen Sea region very likely lost their chicks late last year because of disappearing sea ice underneath their breeding grounds, according to a new study. Parts of this coastal region had lost all of their sea ice by November, which was probably before penguin chicks had grown waterproof adult feathers and learned to swim. It’s the first time scientists have seen a widespread failure across multiple penguin colonies in a region, researchers said. “At the moment, we’re not sure if this is just a blip,” said Norman Ratcliffe, a seabird ecologist with the British Antarctic Survey and one of the authors of the new study. “But if this becomes a consistent phenomena in the longer term, clearly it’s going to have repercussions for the species.”
Persons: , we’re, , Norman Ratcliffe Organizations: British Antarctic Survey Locations: Antarctica’s Bellingshausen
CNN —As rapidly warming global temperatures help push Antarctica’s sea ice to unprecedented lows, it’s threatening the very existence of one of the continent’s most iconic species: emperor penguins. Emperor penguins rely on stable sea ice attached to land for nesting and raising their chicks. For the past few years, scientists have been sounding the alarm about a steep decline in Antarctica’s sea ice. In mid-July, Antarctic sea ice reached the lowest level for this time of year since records began in 1945. Antarctic sea ice also helps regulate the planet’s temperature, reflecting the sun’s incoming energy back to space.
Persons: Norman Ratcliffe, , Ratcliffe, Julian Quinones, , Cassandra Brooks, ” Ratcliffe Organizations: CNN, British Antarctic Survey, University of Colorado Boulder Locations: Bellingshausen, floes, Argentina, Antarctica
Insula South Georgia, teritoriu al Regatului Unit, este un fost avanpost de vânătoare de balene, devenit zonă marină protejată. Acum, un iceberg de 3.900 de kilometri pătrați, care cântărește sute de miliarde de tone metrice, amenință acest ecosistm. Cu doar 200 de metri adâncime, este relativ subțire pentru un iceberg de mărimea sa, ceea ce crește probabilitatea de fragmentare, spun oamenii de știință. În aceste condiții, A68a riscă să se ciocnească de insulă, unde ar putea afecta viața milioanelor de pinguini, scrie digi24.ro. Avem mai degrabă o abordare de tip „Star Trek” - suntem interesați să studiem efectele”, spune el.
Persons: Norman Ratcliffe Organizations: British Antarctic, Deep Locations: Insula South Georgia, Regatului Unit, Antarctica, British Antarctic Survey
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