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Greenhouse Gases Will Affect Africa’s Future Climate, History Reveals

December 5, 2014 By Rebecca McGhee 2 Comments

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The increased level of greenhouse concentrations thousands of years ago was a critical factor in huge amounts of precipitation in two key regions of Africa, as per the researchers.

The researchers at the National Center for Atmospheric Research in Colo conducted the study and published the findings in the Science journal.

The lead author of the study, Bette Otto-Bliesner and NCAR climate scientist said, “The future impact of greenhouse gases on rainfall in Africa is a vital socioeconomic issue. Africa’s atmosphere seems bound to change, with broad ramifications for water resources and farming.”

Since the ice sheets that encased huge parts of North America and northern Europe, withdrew from their top degree around 21000 years back, atmosphere of Africa reacted in a way that headed the researchers in scratching their heads.

After a long dry amid the glacial extreme, the precipitation level in Africa increased to a large degree, beginning around 14700 years back and continued going until around 5000 years back.

The level of precipitation was high that the desert was changed over into savanna and meadow, consequently the researchers named the period as the African Humid Period or AHP.

The confounding part was why the same rainfall event happened in the meantime in two overall divided areas, one north of the equator and one to the south.

It was the most recent time during which the natural global warming had associations with the increase in the concentration of greenhouse gases.

“This study is a venture to settling the riddle of what activated sharp changes in precipitation over southeastern central and northern Africa amid right on time deglaciation,” said Anjuli Bamzai, program chief in NSF’s Division of Atmospheric and Geospace Sciences, which supported the study.

“Through an investigation of intermediary records and atmosphere model imitations, the group exhibited that the recuperation of what’s known as the Atlantic Meridional Overturning Circulation, or AMOC, assumed a part as a starting trigger to wetter conditions.”

To settle the riddle, the fossil pollen was drawn by the specialists, confirmation of previous lake levels and other intermediary records demonstrating the past dampness conditions.

Through correlation of the intermediary records with the computer imitations, the researchers demonstrated that the climate model had the AHP right.

This helps in accepting the part in anticipating about the increasing greenhouse gas focuses may modify the precipitation patterns in an exceptionally populated part of the world.

“Typically atmosphere imitations cover maybe a century, or take a preview of past conditions,” Otto-Bliesner said. “A study like this, dismembering why atmosphere, advanced as it did over this 10,000-year period, was more than I suspected I would see in my profession.”

The study drew on exceptional computer imitation and accumulation and perception of dregs and other records of the past atmosphere. The research was supported by the National Science Foundation or NSF, patron of NCAR, and the US Department of Energy’s Office of Science.

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Rebecca McGhee

Rebecca McGhee is a valuable contributor for several publications and online platforms. Having graduates with a degree in Computer Science, her interest lies mostly in this area. Yet, she finds any tech-related topic or scientific topic is a challenge worth meeting. She enjoys turning her own research projects in worthy contributions that reach the large public. And mostly, she is grateful for all the feedback she receives from readers, as she believes it aids her in permanently improving her style of writing, beyond the scientific style she is accustomed to.

Filed Under: Tech & Science Tagged With: Africa, AMOC, Anjuli Bamzai, Atlantic Meridional Overturning Circulation, Bette Otto-Bliesner, Cliamte, Future climate, NCAR, precipitation, rainfall

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