El Ártico: ahora más tibio

Groenlandia
Image caption Las temperaturas en el Ártico se han registrado las más altas en 2.000 años

Arctic warmest in two millennia

Temperatures in the Arctic are now the highest they've been for 2,000 years, according to scientists. Researchers in the United States say that it is one of the clearest signs yet that human activity is warming the planet.

Reporter: Richard Black

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Scientists have produced evidence showing dramatically that the current temperature rise there is highly unusual. For most of the last two thousand years, the Arctic slowly cooled, a consequence of variations in the Earth's orbit.

But over the last century, the cooling abruptly reversed, and the region is now warmer than at any time in the 2,000 year record. Writing in the journal Science, the researchers say this shows how quickly the Arctic responds to climatic changes.

Richard Black, BBC News

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produced evidence (han) comprobado (con evidencias)

dramaticallynotablemente

a consequence una consecuencia/un resultado

variationscambios

orbitórbita

abruptly repentinamente

reversed cambió dramáticamente

responds to (está) afectado por

climatic changes cambios climáticos