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- Path: sparky!uunet!ogicse!mimbres.cs.unm.edu!constellation!alliant.backbone.uoknor.edu!mfoster
- From: mfoster@alliant.backbone.uoknor.edu (Marc Foster)
- Newsgroups: sci.geo.meteorology
- Subject: Re: Deforestation -> Desertification?
- Message-ID: <Bxy9Dw.E6@constellation.ecn.uoknor.edu>
- Date: 19 Nov 92 06:15:30 GMT
- Article-I.D.: constell.Bxy9Dw.E6
- References: <1992Nov18.201401.27001@vexcel.com>
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- Organization: University of Oklahoma, Norman, OK
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- In article <1992Nov18.201401.27001@vexcel.com> dean@vexcel.com (Dean Alaska) writes:
- >I have read of theories that suggest that deforestation changes
- >rain patterns in ways that can lead to desertification. This has
- >been suggested to be happening in the Amazon and in eastern Africa,
- >where frequent droughts are leading to famine. It is known that
- >Ethiopia and Somalia have experienced significant deforestation.
- >
- >What is the status of these theories among meteorologists and
- >climatologists?
- >--
- > dingo in boulder (dean@vexcel.com)
-
- Marc here, once again inserting his keyboard in his mouth... I know that
- there has been some concern about overgrazing in the African Sahel leading
- to desertification (and an ever-expanding Sahara). The chain goes something
- like this: Goats eat the vegetation, leads to less water holding capacity at
- the surface (and a higher albedo), meaning less water in the system, meaning
- less rain. The higher albedo increases reflectance (duh), possibly reducing
- chances of getting decent surface heating for convection, again decreasing
- rainfall. I haven't heard this theory applied to the Amazon, and my
- familiarity with Eastern Africa rainfall patterns is also suspect, so I'll
- defer that to a real climatologist.
-
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- marc foster, OUSOM | Wiiiiiiiiiiiiiiith, a herring! - MP
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