in his regular analysis in Yaleclimateconnectionsof global...

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    in his regular analysis in Yaleclimateconnectionsof global climate reports meteorologist Jeff Masters made further comments about temperatures in April, La Nina and Arctic Sea ice. Australia’s hot spot Marble Bar even got a guernsey.

    Masters, Ph.D.Jeff worked as a hurricane scientist with the NOAA Hurricane Hunters from 1986-1990. After a near-fatal flight into category 5 Hurricane Hugo, he left the Hurricane Hunters to pursue a safer passion - earning a 1997 Ph.D. in air pollution meteorology from the University of Michigan.

    MASTERS:

    “The relative coolness of April was partially the result of a dissipating La Niña event in the Eastern Pacific: Its cool waters helped depress global surface temperatures. April 2021 was Europe’s coolest April since 2003, according to the European Copernicus Climate Change Service.

    “Global satellite-measured temperatures in April 2021 for the lowest eight kilometers of the atmosphere were the 20th-warmest in the 43-year record, according to the University of Alabama in Huntsville.

    La Niña ends

    ”The moderate La Niña event that began in the summer of 2020 ended in April 2021, said NOAA in its May 13 monthly discussion of the state of the El Niño/Southern Oscillation, or ENSO. The Australian Bureau of Meteorology, which uses a more stringent threshold than NOAA for defining La Niña, reported that the 2020-2021 La Niña event ended in March.

    “Historically, about half of all La Niña events have continued into or re-emerged during a second year.

    Arctic “sea ice extent during April 2021 was the sixth-lowest in the 43-year satellite record, remaining below the tenth percentile range throughout April, according to the National Snow and Ice Data Center.

    “There was little change in the age distribution of the ice compared to last year; at the end of the ice growth season in mid-March, 73.3% of the Arctic Ocean domain was covered by first-year ice, while 3.5% was covered by ice 4+ years old. In March 1985, near the beginning of the ice age record, there was nearly equal amounts of first-year ice (39%) and 4+ year-old ice (30.6%).

    “Highest 2021 average temperature to date (Jan-Apr) worldwide: 31.0°C (87.8°F) at Marble Bar, Australia.”


 
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