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- Path: sparky!uunet!rayssd!jarsun1!rafos!zippy.gso.uri.edu!shipman
- From: shipman@zippy.gso.uri.edu (Scott Lindstrom)
- Newsgroups: sci.environment
- Subject: Re: --Warming Threat to Economy
- Message-ID: <1992Sep14.133410@zippy.gso.uri.edu>
- Date: 14 Sep 92 17:34:10 GMT
- References: <1992Sep11.094843.20185@techbook.com> <1466601760@igc.apc.org> <STEINLY.92Sep10140417@topaz.ucsc.edu>
- Sender: usenet@rafos.UUCP
- Reply-To: shipman@zippy.gso.uri.edu (Scott Lindstrom)
- Organization: U of Rhode Island, Graduate School of Oceanography
- Lines: 44
-
- In article <1992Sep11.094843.20185@techbook.com>, szabo@techbook.com (Nick
- Szabo) writes:
- $>In article <STEINLY.92Sep10140417@topaz.ucsc.edu> steinly@topaz.ucsc.edu
- (Steinn Sigurdsson) writes:
- $>>In article <1466601760@igc.apc.org> tgray@igc.apc.org (Tom Gray) writes:
- $>>
- $>>
- $>> degrees Celsius (C) by the year 2050 will reduce U.S. gross
- $>> domestic product (GDP) by about one percent, or $60 billion.
- $>> However, Cline noted, global warming is cumulative and irreversible
- $>> and is projected to reach 5.7 degrees C by the year 2100 and 10-18
- $>> degrees C by 2300. The impact of the latter figure would be a drop
- $>> of six to 20 percent of GDP.
- $>>
- $>>Ignoring the ludicrous 10-18 K warming figure (what _did_ they
- $>>do to get that? Do a linear extrapolation of 2.5K/50years and add
- $>>nominal error bars? ) it could be noted that 1% variations in GDP
- $>>are economic noise, and US growth rates are 2-3% per year long term
- $>>average. Anyway, isn't the whole problem excess economic growth
- $>>by the "North"? ;-)
- $>
- $>Even more fundamentally, how was that $60 billion derived? Loss of
- $>seacoast real estate? Was the increased productivity of forestry and
- $>agriculture from the CO2 fertilization effect taken into account?
- $>
-
- What, I wonder, is Nick Szabo's reference for this statement? I have read
- nothing to indicate that agriculture will be more productive in an enhanced CO2
- world. Indeed, a month (two months?) ago, I posted a couple of references that
- said as much. Although it is true that plants can do better in an enhanced CO2
- world, the emphasis must be placed on `can'. Will they? Doubtful. Any gains
- caused by decrease in stomatal loss of water are countered by no increase in
- nutrients, and by the fact that both `good' plants and `pest' plants enjoy the
- effects of CO2 `fertilization'.
-
- Nick, please post the reference, and the results of it, that lead you to
- conclude that agriculture and forestry will be more productive in an enhanced
- CO2 world. Let us all read it.
-
- Scott
- --
- The only other sound's the sweep of easy wind and downy flake
-
- shipman@zippy.gso.uri.edu 4017926509 URI GSO NBC Narragansett RI 02882
-