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More about how the Sahara creates the Amazon

Maggie Koerth-Baker at 8:37 am Fri, Aug 17, 2012

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On Monday, I posted about an incredibly fascinating study linking the minerals that fertilize the Amazon rainforest to a specific corner of the Sahara desert in the country of Chad. That lake of sand—once an actual lake the size of California—is what keeps the Amazon green and verdant.

The interesting thing is that the study is actually not anything new. It came out in 2006. I heard about it from science writer Colin Schultz. Earlier this week, Colin went on News Talk 610 CKTB out of Niagara Falls, Ontario, to talk about how he stumbled across the study and why it's important far beyond simply connecting the desert and the jungle.

The interview delves into the subject in a lot more depth. In fact, it's a great demonstration of how reading a single research paper can be interesting, but doesn't necessarily give you the full picture of what's actually going on in science. Turns out, what we know about how dust travels to the Amazon has important implications for how we think about climate change and geoengineering. Also great: Colin comparing the volume of dust traveling from the Sahara to the volume of several Honda Civics. It's short, and very much worth listening to.

You can follow Colin Schultz on Twitter. BTW: He'd like you to know that when he says "bioengineers" in the interview, he means "geoengineers".

Read More:
• A 2010 Nature News article on the connection between the Sahara and the Amazon.
• Geophysical Research Letters on changes in dust transport over time.
• NASA on the way that dust affects climate.
• A 2010 follow-up to the 2006 paper by the same group of researchers. Colin says that this gets more into the details of how the dust becomes an important fertilizer in the Amazon.

Image: rainforest, a Creative Commons Attribution (2.0) image from tauntingpanda's photostream

Maggie Koerth-Baker is the science editor at BoingBoing.net. She writes a monthly column for The New York Times Magazine and is the author of Before the Lights Go Out, a book about electricity, infrastructure, and the future of energy. You can find Maggie on Twitter and Facebook.

Maggie goes places and talks to people. Find out where she'll be speaking next.

MORE:  amazon • climate • desert • dust • follow ups • rainforest • Sahara • Science

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  • TrevorSweet

    Fun fact:  The name Sahara derives from the Arabic word for desert. See also Gobi.

  • chdunk

    Actually, the hypothesis is even older than that.  See:

    “Saharan Dust in the Amazon Basin”
    Swap R, Garstang M, Greco S, Talbot R, Kallberg P. Tellus Series B-Chemical and Physical Meteorology. 1992;44(2):133-149.

  • beforewepost

    Two questions:
    1)Is there anyway to download the interview for listening to on my commute?
    2) Is there anything special about the dust? That is it especially rich in nutrients?

    • Paul Renault

       Ditto: I have never been able to get anything from (I’m assuming it’s) SoundCloud.  Ever, even from their site.

      It might be becauses SoundCloud is so intimately linked to Facebook, that my ‘hosts’ file doesn’t like it.  Are there any alternatives?