Sea-surface partial pressure of carbon dioxide in the eastern equatorial Pacific (August 1991 to October 1992): A multivariate analysis of physical and biological factors
Identifieur interne : 001F91 ( Main/Exploration ); précédent : 001F90; suivant : 001F92Sea-surface partial pressure of carbon dioxide in the eastern equatorial Pacific (August 1991 to October 1992): A multivariate analysis of physical and biological factors
Auteurs : Yves Dandonneau [France]Source :
- Deep-Sea Research Part II [ 0967-0645 ] ; 1995.
Abstract
Underway PCO2 measurements were made every three months from a merchant ship in the equatorial Pacific Ocean. The shipping track from Panama to Tahiti crosses the equator near 100°W, collecting PCO2, sea surface temperature (SST), fluorescence of chlorophyll, nitrate concentration and depth of the mixed layer. The survey started in August 1991, with strong upwelling conditions and PCO2 peaking at 484 μatm right at the equator. Equatorial warming in November 1991 and decreased upwelling occurred with maximum PCO2 at 460 μatm, at 2°30′S. With the advent of the 1992 El Niño, and the collapse of equatorial upwelling, PCO2 was drastically reduced in March 1992. The maximum of PCO2 was only 397 μatm at 0°40′S, and values greater than 380 μatm spread southward to 6°S. Nitrate concentration, however, was still high between the equator and 10°S. With return to normal conditions in June 1992, PCO2 rose to 437 μatm at 2°30′S, and in October 1992 strong upwelling brought CO2-rich water to the surface, with maximum PCO2 at 0°12′N, at 480 μatm. Multivariate analysis of the data between 7°N and 20°S, after normalization, shows that 60% of the total variance could be explained by the first eigenvector, in which PCO2, nitrate and fluorescence were opposed to SST. The empirical orthogonal function (EOF) associated to this eigenvector was maximum at or near the equator and decreased abruptly to the north but gradually to the south. This EOF and the corresponding eigenvector could be interpreted as a synthetic representation of the influence of upwelling and of the main processes that modify PCO2: biological carbon uptake and heating. The variations of the depth of the mixed layer (taken as the depth where temperature was 1°C below SST) were uncorrelated with PCO2. A strong correlation (r = 0.97, n = 5) was found between the temperature of upwelled waters (i.e. the minimum SST observed near the equator) and the average PCO2 between 0° and 5°S.
Url:
DOI: 10.1016/0967-0645(95)00017-K
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 001673
- to stream Istex, to step Curation: 001673
- to stream Istex, to step Checkpoint: 000E64
- to stream Main, to step Merge: 002048
- to stream Main, to step Curation: 001F91
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title>Sea-surface partial pressure of carbon dioxide in the eastern equatorial Pacific (August 1991 to October 1992): A multivariate analysis of physical and biological factors</title>
<author><name sortKey="Dandonneau, Yves" sort="Dandonneau, Yves" uniqKey="Dandonneau Y" first="Yves" last="Dandonneau">Yves Dandonneau</name>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">ISTEX</idno>
<idno type="RBID">ISTEX:29982923A6A1FAED94BB9829F0B289CAD9E7A7DF</idno>
<date when="1995" year="1995">1995</date>
<idno type="doi">10.1016/0967-0645(95)00017-K</idno>
<idno type="url">https://api.istex.fr/document/29982923A6A1FAED94BB9829F0B289CAD9E7A7DF/fulltext/pdf</idno>
<idno type="wicri:Area/Istex/Corpus">001673</idno>
<idno type="wicri:Area/Istex/Curation">001673</idno>
<idno type="wicri:Area/Istex/Checkpoint">000E64</idno>
<idno type="wicri:doubleKey">0967-0645:1995:Dandonneau Y:sea:surface:partial</idno>
<idno type="wicri:Area/Main/Merge">002048</idno>
<idno type="wicri:Area/Main/Curation">001F91</idno>
<idno type="wicri:Area/Main/Exploration">001F91</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title level="a">Sea-surface partial pressure of carbon dioxide in the eastern equatorial Pacific (August 1991 to October 1992): A multivariate analysis of physical and biological factors</title>
<author><name sortKey="Dandonneau, Yves" sort="Dandonneau, Yves" uniqKey="Dandonneau Y" first="Yves" last="Dandonneau">Yves Dandonneau</name>
<affiliation wicri:level="4"><country xml:lang="fr">France</country>
<wicri:regionArea>LODYC (Unité mixte de recherche CNRS-ORSTOM-UPMC), Tour 14, 2ème étage, Université Pierre et Marie Curie, 4, Place Jussieu, 75252 Paris cedex 05</wicri:regionArea>
<placeName><region type="region" nuts="2">Île-de-France</region>
<settlement type="city">Paris</settlement>
</placeName>
<orgName type="university">Université Pierre-et-Marie-Curie</orgName>
</affiliation>
</author>
</analytic>
<monogr></monogr>
<series><title level="j">Deep-Sea Research Part II</title>
<title level="j" type="abbrev">DSRII</title>
<idno type="ISSN">0967-0645</idno>
<imprint><publisher>ELSEVIER</publisher>
<date type="published" when="1995">1995</date>
<biblScope unit="volume">42</biblScope>
<biblScope unit="issue">2–3</biblScope>
<biblScope unit="page" from="349">349</biblScope>
<biblScope unit="page" to="364">364</biblScope>
</imprint>
<idno type="ISSN">0967-0645</idno>
</series>
<idno type="istex">29982923A6A1FAED94BB9829F0B289CAD9E7A7DF</idno>
<idno type="DOI">10.1016/0967-0645(95)00017-K</idno>
<idno type="PII">0967-0645(95)00017-K</idno>
</biblStruct>
</sourceDesc>
<seriesStmt><idno type="ISSN">0967-0645</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass></textClass>
<langUsage><language ident="en">en</language>
</langUsage>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">Underway PCO2 measurements were made every three months from a merchant ship in the equatorial Pacific Ocean. The shipping track from Panama to Tahiti crosses the equator near 100°W, collecting PCO2, sea surface temperature (SST), fluorescence of chlorophyll, nitrate concentration and depth of the mixed layer. The survey started in August 1991, with strong upwelling conditions and PCO2 peaking at 484 μatm right at the equator. Equatorial warming in November 1991 and decreased upwelling occurred with maximum PCO2 at 460 μatm, at 2°30′S. With the advent of the 1992 El Niño, and the collapse of equatorial upwelling, PCO2 was drastically reduced in March 1992. The maximum of PCO2 was only 397 μatm at 0°40′S, and values greater than 380 μatm spread southward to 6°S. Nitrate concentration, however, was still high between the equator and 10°S. With return to normal conditions in June 1992, PCO2 rose to 437 μatm at 2°30′S, and in October 1992 strong upwelling brought CO2-rich water to the surface, with maximum PCO2 at 0°12′N, at 480 μatm. Multivariate analysis of the data between 7°N and 20°S, after normalization, shows that 60% of the total variance could be explained by the first eigenvector, in which PCO2, nitrate and fluorescence were opposed to SST. The empirical orthogonal function (EOF) associated to this eigenvector was maximum at or near the equator and decreased abruptly to the north but gradually to the south. This EOF and the corresponding eigenvector could be interpreted as a synthetic representation of the influence of upwelling and of the main processes that modify PCO2: biological carbon uptake and heating. The variations of the depth of the mixed layer (taken as the depth where temperature was 1°C below SST) were uncorrelated with PCO2. A strong correlation (r = 0.97, n = 5) was found between the temperature of upwelled waters (i.e. the minimum SST observed near the equator) and the average PCO2 between 0° and 5°S.</div>
</front>
</TEI>
<affiliations><list><country><li>France</li>
</country>
<region><li>Île-de-France</li>
</region>
<settlement><li>Paris</li>
</settlement>
<orgName><li>Université Pierre-et-Marie-Curie</li>
</orgName>
</list>
<tree><country name="France"><region name="Île-de-France"><name sortKey="Dandonneau, Yves" sort="Dandonneau, Yves" uniqKey="Dandonneau Y" first="Yves" last="Dandonneau">Yves Dandonneau</name>
</region>
</country>
</tree>
</affiliations>
</record>
Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/France/explor/LeHavreV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001F91 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 001F91 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien |wiki= Wicri/France |area= LeHavreV1 |flux= Main |étape= Exploration |type= RBID |clé= ISTEX:29982923A6A1FAED94BB9829F0B289CAD9E7A7DF |texte= Sea-surface partial pressure of carbon dioxide in the eastern equatorial Pacific (August 1991 to October 1992): A multivariate analysis of physical and biological factors }}
This area was generated with Dilib version V0.6.25. |