CO2 form agricultural trade


	CO2 form agricultural trade

kmcolo

5-26-2007 10:10 AM

428 views

tags:

co2, science, ghg, model, climate

kmcolo says:

The growth of crops is a CO2 sink and the consumption of food is a CO2 source. The impact that trade has on the North-South distribution of CO2 is not measurable but it can have an impact on attempts to back calculate the East-West source distribution.

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/0ce4c2b7-7197-4963-8ea4-fc682f25ba25/3B1BC5BE-435D-477D-A283-4E6BC30E7D42/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.agu.org/pubs/crossref/2007/2006GB002741.shtml" href="http://www.agu.org/pubs/crossref/2007/2006GB002741.shtml" style="font-size: 11px;">www.agu.org</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.agu.org/pubs/crossref/2007/2006GB002741.shtml">The growth of crops represents a sink of atmospheric CO<SUB>2</SUB>, whereas biomass is consumed by humans and housed animals, yielding respiratory sources of CO<SUB>2</SUB>. This process induces a lateral displacement of carbon and creates geographic patterns of CO<SUB>2</SUB> sources and sinks at the surface of the globe.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.agu.org/pubs/crossref/2007/2006GB002741.shtml">The CO<SUB>2</SUB> flux maps show regional dipoles of sources and sinks in Asia and North America.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.agu.org/pubs/crossref/2007/2006GB002741.shtml">The mean latitudinal CO<SUB>2</SUB> gradients induced by the displacement of crop products are fairly small</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.agu.org/pubs/crossref/2007/2006GB002741.shtml">indicating that this process has a only a small influence in explaining the latitudinal distribution of CO<SUB>2</SUB> fluxes.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.agu.org/pubs/crossref/2007/2006GB002741.shtml">On the other hand, the simulated longitudinal mean atmospheric CO<SUB>2</SUB> gradients at northern midlatitudes (≈ up to 0.5 ppm) are comparable to the ones measured between atmospheric stations, suggesting
            that CO<SUB>2</SUB> fluxes from crop products trade are an important component of continental- and regional-scale CO<SUB>2</SUB> budgets.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.agu.org/pubs/crossref/2007/2006GB002741.shtml">Thus they should be accounted for as prior information in regional inversions.</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/3B1BC5BE-435D-477D-A283-4E6BC30E7D42/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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