Raymond Arritt wrote:
> naught101 wrote:
>> Anyone know if this biotic pump effect is included in any current
>> climate models? I guess it wouldn't be, since it's a fairly new
>> hypothesis, but it seems fairly convincing, and could have some
>> interesting impacts...
>>
>> http://www.bioticregulation.ru/pubs/pubs2.php
>>
>> See especially: Gorshkov V.G., Makarieva A.M. (2007) Biotic pump of
>> atmospheric moisture as driver of the hydrological cycle on land.
>> Hydrology and Earth System Sciences, 11, 1013-1033. Abstract. PDF (1
>> Mb).
>
> From what sense I can make of the abstract they're just talking about
> evapotranspiration as mediated by different types of vegetation, which
> is included in all models nowadays.
I think it's a bit kookier than that, they claim that this effect (via
direct human interference) dominates GHG forcing. At which point I say,
"no, no credible models include *this* effect" :-)
I would also suspect that several of the simpler GCMs (eg, relative
newcomers to global climate modelling) do not include much in the way of
vegetation effects. I don't know in detail though.
Basically, there is a grain of truth in the site, and this truth is well
accepted in mainstream climate science, but I don't believe it is as
dominant an effect as they claim.
James
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