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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>Sasha C. Reed</dc:contributor>
  <dc:contributor>Cory C. Cleveland</dc:contributor>
  <dc:contributor>Ashley P Ballantyne</dc:contributor>
  <dc:contributor>William R. L. Anderegg</dc:contributor>
  <dc:contributor>William R. Wieder</dc:contributor>
  <dc:contributor>Yi Y Liu</dc:contributor>
  <dc:contributor>Steven W. Running</dc:contributor>
  <dc:creator>W. Kolby Smith</dc:creator>
  <dc:date>2015</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;Atmospheric mass balance analyses suggest that terrestrial carbon (C) storage is increasing, partially abating the atmospheric [CO&lt;/span&gt;&lt;sub&gt;&lt;span&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;] growth rate&lt;/span&gt;&lt;span&gt;, although the continued strength of this important ecosystem service remains uncertain&lt;/span&gt;&lt;span&gt;. Some evidence suggests that these increases will persist owing to positive responses of vegetation growth (net primary productivity; NPP) to rising atmospheric [CO&lt;/span&gt;&lt;sub&gt;&lt;span&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;] (that is, &amp;lsquo;CO&lt;/span&gt;&lt;sub&gt;&lt;span&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;&amp;nbsp;fertilization&lt;/span&gt;&lt;span class="mb"&gt;&amp;rsquo;&lt;/span&gt;&lt;span&gt;)&lt;/span&gt;&lt;span&gt;. Here, we present a new satellite-derived global terrestrial NPP data set&lt;/span&gt;&lt;span&gt;, which shows a significant increase in NPP from 1982 to 2011. However, comparison against Earth system model (ESM) NPP estimates reveals a significant divergence, with satellite-derived increases (2.8 &amp;plusmn; 1.50%) less than half of ESM-derived increases (7.6&lt;/span&gt;&lt;span class="mb"&gt;&lt;span class="mb"&gt;&amp;thinsp;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;&amp;nbsp;&amp;plusmn;&amp;nbsp;&lt;/span&gt;&lt;span class="mb"&gt;&lt;span class="mb"&gt;&amp;thinsp;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;1.67%) over the 30-year period. By isolating the CO&lt;/span&gt;&lt;sub&gt;&lt;span&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;&amp;nbsp;fertilization effect in each NPP time series and comparing it against a synthesis of available free-air CO&lt;/span&gt;&lt;sub&gt;&lt;span&gt;2&amp;nbsp;&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;enrichment data&lt;/span&gt;&lt;span&gt;, we provide evidence that much of the discrepancy may be due to an over-sensitivity of ESMs to atmospheric [CO&lt;/span&gt;&lt;sub&gt;&lt;span&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;], potentially reflecting an under-representation of climatic feedbacks&lt;/span&gt;&lt;span&gt;&amp;nbsp;and/or a lack of representation of nutrient constraints&lt;/span&gt;&lt;span&gt;. Our understanding of CO&lt;/span&gt;&lt;sub&gt;&lt;span&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span&gt;&amp;nbsp;fertilization effects on NPP needs rapid improvement to enable more accurate projections of future C&amp;nbsp;cycle&amp;ndash;climate feedbacks; we contend that better integration of modelling, satellite and experimental approaches offers a promising way forward.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1038/nclimate2879</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Nature Publishing Group</dc:publisher>
  <dc:title>Large divergence of satellite and Earth system model estimates of global terrestrial CO&lt;sub&gt;2&lt;/sub&gt; fertilization</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>