LEARN. THINK. EXPLORE.
  • Home
  • class sampler
  • Summer 2023
  • Fall 2023
  • FAQ
  • About
  • Blog
  • Contact

Learning Outside the Box

GEOGRAPHY IN THE NEWS:

1/8/2019

0 Comments

 
The Sahara is the second largest desert on earth, but that was not always the case. More interestingly, it may not be the case in the future either. "[R]esearchers at MIT have analyzed dust deposited off the coast of west Africa over the last 240,000 years, and found that the Sahara, and North Africa in general, has swung between wet and dry climates every 20,000 years. They say that this climatic pendulum is mainly driven by changes to the Earth's axis as the planet orbits the sun, which in turn affect the distribution of sunlight between seasons -- every 20,000 years, the Earth swings from more sunlight in summer to less, and back again. For North Africa, it is likely that, when the Earth is tilted to receive maximum summer sunlight with each orbit around the sun, this increased solar flux intensifies the region's monsoon activity, which in turn makes for a wetter, 'greener' Sahara. When the planet's axis swings toward an angle that reduces the amount of incoming summer sunlight, monsoon activity weakens, producing a drier climate similar to what we see today." news.mit.edu/2019/study-regulating-north-african-climate-0102
0 Comments



Leave a Reply.

    Blog sharing news about geography, philosophy, world affairs, and outside-the-box learning

    This blog also appears on Facebook:
    www.facebook.com/LearningOutsideTheBox.LearnThinkExplore

    Archives

    March 2023
    February 2023
    January 2023
    December 2022
    November 2022
    October 2022
    September 2022
    August 2022
    July 2022
    June 2022
    May 2022
    April 2022
    March 2022
    February 2022
    January 2022
    December 2021
    November 2021
    October 2021
    September 2021
    August 2021
    July 2021
    June 2021
    May 2021
    April 2021
    March 2021
    February 2021
    January 2021
    December 2020
    November 2020
    October 2020
    September 2020
    August 2020
    July 2020
    June 2020
    May 2020
    April 2020
    March 2020
    February 2020
    January 2020
    December 2019
    November 2019
    October 2019
    September 2019
    August 2019
    July 2019
    June 2019
    May 2019
    April 2019
    March 2019
    February 2019
    January 2019
    December 2018
    November 2018
    October 2018
    September 2018
    August 2018
    July 2018
    June 2018
    May 2018
    April 2018
    March 2018
    February 2018
    January 2018
    December 2017
    November 2017
    October 2017
    September 2017
    August 2017
    July 2017
    June 2017
    May 2017
    April 2017
    March 2017
    February 2017
    January 2017
    December 2016
    November 2016
    October 2016
    September 2016
    August 2016

    Categories

    All
    Biogeography
    Book
    Cartograms
    Climate
    Contests
    Cultural Geography
    Demographics
    Economic Geography
    Extraplanetary Geography
    Geography Technology
    "Global Issues..."
    Historical Geography
    Human Geography
    Language Geography
    Miltary Geography
    Out Exploring
    Outside The Box
    Philosophically Speaking
    Physical Geography
    Political Geography
    Quiz
    Science Fiction
    Scifi
    U.S. Geography
    Video/interactive
    World Geo_Africa
    World Geo_Asia
    World Geo_Europe
    World Geography
    World Geo_Latin America
    World Geo_Mid.East
    World Geo_N America
    World Geo_Oceania
    World Geo_oceans
    World Geo_polar
    World Geo_S America

    RSS Feed

Proudly powered by Weebly
  • Home
  • class sampler
  • Summer 2023
  • Fall 2023
  • FAQ
  • About
  • Blog
  • Contact