Thursday, November 25, 2021

CDC warns of rising flu infection rates among young people

Nov. 24 (UPI) -- The Centers for Disease Control and Prevention warned Wednesday that cases of influenza have been on the rise among young...
More

    Latest Posts

    Florence Pugh Posted A Pic With New Red Hair And Fans Are Confused…

    Florence Pugh might be the latest celebrity to go red for the season…or she may just be taking the look for a test drive....

    Everything Elle Fanning Does In The Great Is Iconic

    “I NEVER F*CKED A HORSE,” Elle Fanning screams in the second episode of the second season of The Great, out now on Hulu. Let’s just...

    Fashion Awards 2021: Date, Location, The Nominees, Winners And Host

    As December nears, those of you with a keen eye on the ins and outs of the fashion world will no doubt be wondering...

    5 ways to pet proof your home

    Our houses are home to many hidden hazards that can pose a danger to pets. From leftovers chicken bones thrown into the rubbish bin...

    Arctic Ocean started to warm decades earlier than scientists thought

    Arctic Ocean started to warm decades earlier than scientists thought

    Researchers reconstructed the recent history of ocean warming near the Arctic Ocean in a region called the Fram Strait, between Greenland and Svalbard, finding that the Arctic has been warming for much longer than earlier records suggested. Photo courtesy of Sara Giansiracusa

    Nov. 24 (UPI) — The Arctic Ocean has been warming since the beginning of the 20th century, fueled by a process known as Atlantification, according to a study published Wednesday in the journal Science Advances.

    The new research highlights the connection between the North Atlantic and Arctic between Greenland and Svalbard, a region known was Fram Strait, where warmer, saltier water from the south has been steadily infiltrating northern waters.

    “Pinpointing the exact timing of the onset of Atlantification in the Arctic can give us some important clues as to the exact driving mechanisms behind this phenomenon,” study co-lead author Francesco Muschitiello told UPI in an email.

    A more precise Arctic warming timeline will also allow scientists to compare the history of climate change in the Arctic to changes in volcanism, solar activity, freshwater, greenhouse gases, aerosols and more.

    “[This] will ultimately help better quantifying the sensitivity of Arctic warming to natural versus anthropogenic forcing,” said Muschitiello, a marine scientist with the University of Cambridge’s Department of Geography.

    For decades, scientists have noted changes in Arctic climate patterns. The atmosphere and ocean near the poles are warming at a rate double the global average, ocean waters continue to grow saltier and sea ice remains on the retreat.

    But the mechanisms driving these accelerated changes remain a point of contention among Arctic researchers.

    “There is some ongoing debate in our community as to what drives the recent rapid sea ice retreat in the Atlantic portion Arctic,” University College London climate scientist Michel Tsamados told UPI in an email.

    The drivers of Arctic warming and sea ice loss either are oceanic or atmospheric or some combination of the two.

    “Some of the recent views are that most of the variability is atmospheric-driven, with winds and temperature driving sea ice variability that in turns imprints the ocean temperatures,” said Tsamados, who was not involved in the new study.

    “Others have hypothesized regional mechanisms by which localized tipping points in sea ice decline are driven by the combined effect of the thinning sea ice cover and Atlantic warm current influxes in the region,” Tsamados said.

    To figure out exactly when and how the Arctic Ocean began warming at an accelerated rate, researchers studied chemical changes in the fossil shells of microorganisms from ocean sediments.

    The seafloor sediment cores provided researchers with geochemical and ecological data stretching back 800 years.

    For most of those 800 years, researchers noted the Arctic Ocean’s temperature and salinity were relatively stable. But the geochemical signatures began to shift around the beginning of the 20th century, revealing a significant uptick in temperature and salinity.

    When scientists compared their updated warming timeline with records of ocean circulation at lower latitudes, they found the shift corresponded with a slowdown of dense water formation in the Labrador Sea.

    Scientists expect deep water circulation within this subpolar region to decelerate as the planet warms and temperature differences between polar and mid-latitude regions decrease. As result, researchers predict climate change will continue to spur Atlantification in the Arctic Ocean.

    “Establishing accurate timing between events in the Arctic proper and sub-Arctic areas is critical for understanding linkages and causation of changes observed in the polar basins,” University of Alaska atmospheric scientist Igor Polyakov told UPI in an email.

    “Various temporal and spacial scales of processes involved in communication of the Arctic Ocean with lower latitude basins make this analysis very difficult and each new study is a welcome addition to the previous efforts,” said Polyakov, who has studied Atlantification in the Arctic, but was not involved in the most recent paper.

    Perhaps most importantly, Muschitiello and his colleagues were able to show that most climate models fail to identify this early period of warming surrounding the Fram Strait, which suggests simulations don’t fully account for the mechanisms driving Atlantification in the Arctic.

    The climate models used to predict how Arctic systems will behave in the future — and influence climate systems all over the globe — must rely on accurate reconstructions of past climate change, researchers said.

    “[Pinpointing the exact timing of the onset of Atlantification in the Arctic] also provides an important ‘observational’ benchmark to improve historical climate model simulations and highlight physical processes that are potentially under-represented in climate models,” Muschitiello said.

    Latest Posts

    Florence Pugh Posted A Pic With New Red Hair And Fans Are Confused…

    Florence Pugh might be the latest celebrity to go red for the season…or she may just be taking the look for a test drive....

    Everything Elle Fanning Does In The Great Is Iconic

    “I NEVER F*CKED A HORSE,” Elle Fanning screams in the second episode of the second season of The Great, out now on Hulu. Let’s just...

    Fashion Awards 2021: Date, Location, The Nominees, Winners And Host

    As December nears, those of you with a keen eye on the ins and outs of the fashion world will no doubt be wondering...

    5 ways to pet proof your home

    Our houses are home to many hidden hazards that can pose a danger to pets. From leftovers chicken bones thrown into the rubbish bin...

    Don't Miss

    New Orleans Saints star RB Alvin Kamara ruled out vs. Buffalo Bills

    NFL // 1 hour ago Vikings' Everson Griffen exits home, getting care after early morning incident Nov. 24 (UPI) -- Minnesota Vikings defensive end Everson...

    Sweden’s first female prime minister, Magdalena Andersson, resigns hours after being voted in

    World News // 51 minutes ago Lebanon-Saudi crisis deepens, with no solution in sight BEIRUT, Lebanon, Nov. 24 (UPI) -- Lebanon's emerging crisis with Saudi...

    Biden administration blacklists 27 companies over national security concerns

    Secretary of Commerce Gina Raimondo said the blacklisting would safeguard national security interests. Photo by...

    T-Mobile to pay $19.5M settlement over outage, missed 911 calls

    Nov. 24 (UPI) -- T-Mobile has agreed to pay $19.5 million to settle a Federal Communications Commission investigation into a 12-hour outage of its...

    Missourians win $3 million lottery jackpot after previously winning $250,000

    Odd News // 1 day ago Iowa man collects two $75,000 lottery prizes after previously winning $200,000 Nov. 23 (UPI) -- An Iowa man collected...

    Stay in touch

    To be updated with all the latest news, offers and special announcements.