Read here and here. It is a common refrain from global warming alarmists that the Medieval Warming Period was only a regional phenomenon, experienced only in the Northern Hemisphere, primarily in Europe. They continue to state this despite the scientific evidence supporting that the Medieval Warming, and other climatic periods, were world-wide events that affected different areas, at slightly different times and period extent spans.
From Antarctica, peer-reviewed research has studied the remains of mummified elephant seals from the Ross Sea area, which the seals used once as a habitat and breeding ground. Not any longer. The cold after Antarctica's warming drove the seals away, plus the sea pack ice caused the Adelie penguins to move to warmer areas.
"Hall believes the presence of colonies along Victoria Land as
recently as a thousand years ago indicate the region was warmer than it
is today"...."The ice regime remains too severe for either elephant seals or penguins to occupy the southern VLC today.”
“We’re interested in them because they shouldn’t be there....Elephant seals don’t live in the Ross Sea today"....The most recent warming period occurred between 1,000 and 2,500 years ago, Hall noted. “We have pretty good evidence of that time period”
"Denying the existence of the Medieval Warm Period borders on silly, for as we see in this article (along with hundreds of others), the planet was so warm 1,000+ years ago that elephant seals moved south to a much warmer Antarctica. The case is occasionally made that the Medieval Warm Period was a European event, or maybe an event confined to the mid-to-high latitudes of the Northern Hemisphere. The skin, hair, and mummified offspring of elephant seals found in Antarctica clearly show that the entire planet was substantially warmer than today 1,000+ years ago."
