<?xml version='1.0' encoding='utf-8'?>
<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>M. Stage</dc:contributor>
  <dc:contributor>Joseph L. Wooden</dc:contributor>
  <dc:contributor>B.R. Constantz</dc:contributor>
  <dc:contributor>R. B. Dunbar</dc:contributor>
  <dc:contributor>A. Owen</dc:contributor>
  <dc:contributor>N. Grumet</dc:contributor>
  <dc:contributor>C. R. Bacon</dc:contributor>
  <dc:contributor>C. P. Chamberlain</dc:contributor>
  <dc:creator>A. Meibom</dc:creator>
  <dc:date>2003</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;In thermodynamic equilibrium with sea water the Sr/Ca ratio of aragonite varies predictably with temperature and the Sr/Ca ratio in coral have thus become a frequently used proxy for past Sea Surface Temperature (SST). However, biological effects can offset the Sr/Ca ratio from its equilibrium value. We report high spatial resolution ion microprobe analyses of well defined skeletal elements in the reef‐building coral&amp;nbsp;&lt;/span&gt;&lt;i&gt;Porites lutea&lt;/i&gt;&lt;span&gt;&amp;nbsp;that reveal distinct monthly oscillations in the Sr/Ca ratio, with an amplitude in excess of ten percent. The extreme Sr/Ca variations, which we propose result from metabolic changes synchronous with the lunar cycle, introduce variability in Sr/Ca measurements based on conventional sampling techniques well beyond the analytical precision. These variations can limit the accuracy of Sr/Ca paleothermometry by conventional sampling techniques to about 2°C. Our results may help explain the notorious difficulties involved in obtaining an accurate and consistent calibration of the Sr/Ca vs. SST relationship.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1029/2002GL016864</dc:identifier>
  <dc:language>en</dc:language>
  <dc:title>Monthly Strontium/Calcium oscillations in symbiotic coral aragonite: Biological effects limiting the precision of the paleotemperature proxy</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>