Research Spotlight: Using satellite data to estimate the North Atlantic Ocean circulation
Identifieur interne : 000051 ( Main/Exploration ); précédent : 000050; suivant : 000052Research Spotlight: Using satellite data to estimate the North Atlantic Ocean circulation
Auteurs : Ernie Tretkoff [États-Unis]Source :
- Eos, Transactions American Geophysical Union [ 0096-3941 ] ; 2011-03-08.
Descripteurs français
- Wicri :
- topic : Arctique, Changement climatique.
English descriptors
- KwdEn :
- Arctic, Arctic ocean, Arctic summer, Carbon cycle, Climate change, Climate models, Cultural legitimacy, Exergy, Geophysical, Geophysical research letters, Global carbon cycle, Goce, Gravity field, Greenhouse gases, Life cycle assessment, Lower atmosphere, Nitric, Nitric oxide, Nitric oxide emissions, Ocean currents.
- Teeft :
- Arctic, Arctic ocean, Arctic summer, Carbon cycle, Climate change, Climate models, Cultural legitimacy, Exergy, Geophysical, Geophysical research letters, Global carbon cycle, Goce, Gravity field, Greenhouse gases, Life cycle assessment, Lower atmosphere, Nitric, Nitric oxide, Nitric oxide emissions, Ocean currents.
Abstract
By redistributing heat and freshwater around the planet, ocean currents play a crucial role in regulating Earth's climate. Accurate knowledge of the subtle regional variations in Earth's gravity field is fundamental to the measurement of ocean currents, but the challenge of mapping Earth's gravity in sufficient detail has previously limited scientists' ability to reliably determine the ocean's time‐mean circulation. To address this problem, in October 2009 the European Space Agency launched the Gravity field and steady‐state Ocean Circulation Explorer (GOCE) satellite with the aim of mapping Earth's gravity field with unprecedented spatial resolution. Bingham et al. present an initial assessment of the performance of GOCE by using the first data from the satellite to estimate the time‐mean circulation of the North Atlantic Ocean. This basin is particularly interesting because it contains the Gulf Stream, the world's strongest current and a key component of the global overturning circulation, which carries heat from the equator to high northerly latitudes. The scientists show that with just 2 months of observations, the GOCE estimate of the North Atlantic circulation is superior to that obtained from 8 years of data from the Gravity Recovery and Climate Experiment (GRACE) satellite. In many places, the current speeds estimated from the GOCE data compare well with those obtained from in situ observations, providing strong validation of the GOCE mission design. Accumulation of data as the mission progresses could lead to a more accurate and detailed map of the ocean's currents. (Geophysical Research Letters, doi:10.1029/2010GL045633, 2011)
Url:
DOI: 10.1029/2011EO100013
Affiliations:
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C.</wicri:regionArea><wicri:noRegion>D. C.</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Eos, Transactions American Geophysical Union</title><title level="j" type="alt">EOS, TRANSACTIONS AMERICAN GEOPHYSICAL UNION</title><idno type="ISSN">0096-3941</idno><idno type="eISSN">2324-9250</idno><imprint><biblScope unit="vol">92</biblScope><biblScope unit="issue">10</biblScope><biblScope unit="page" from="88">88</biblScope><biblScope unit="page" to="88">88</biblScope><biblScope unit="page-count">1</biblScope><date type="published" when="2011-03-08">2011-03-08</date></imprint><idno type="ISSN">0096-3941</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0096-3941</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Arctic</term><term>Arctic ocean</term><term>Arctic summer</term><term>Carbon cycle</term><term>Climate change</term><term>Climate models</term><term>Cultural legitimacy</term><term>Exergy</term><term>Geophysical</term><term>Geophysical research letters</term><term>Global carbon cycle</term><term>Goce</term><term>Gravity field</term><term>Greenhouse gases</term><term>Life cycle assessment</term><term>Lower atmosphere</term><term>Nitric</term><term>Nitric oxide</term><term>Nitric oxide emissions</term><term>Ocean currents</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Arctic</term><term>Arctic ocean</term><term>Arctic summer</term><term>Carbon cycle</term><term>Climate change</term><term>Climate models</term><term>Cultural legitimacy</term><term>Exergy</term><term>Geophysical</term><term>Geophysical research letters</term><term>Global carbon cycle</term><term>Goce</term><term>Gravity field</term><term>Greenhouse gases</term><term>Life cycle assessment</term><term>Lower atmosphere</term><term>Nitric</term><term>Nitric oxide</term><term>Nitric oxide emissions</term><term>Ocean currents</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Arctique</term><term>Changement climatique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract">By redistributing heat and freshwater around the planet, ocean currents play a crucial role in regulating Earth's climate. Accurate knowledge of the subtle regional variations in Earth's gravity field is fundamental to the measurement of ocean currents, but the challenge of mapping Earth's gravity in sufficient detail has previously limited scientists' ability to reliably determine the ocean's time‐mean circulation. To address this problem, in October 2009 the European Space Agency launched the Gravity field and steady‐state Ocean Circulation Explorer (GOCE) satellite with the aim of mapping Earth's gravity field with unprecedented spatial resolution. Bingham et al. present an initial assessment of the performance of GOCE by using the first data from the satellite to estimate the time‐mean circulation of the North Atlantic Ocean. This basin is particularly interesting because it contains the Gulf Stream, the world's strongest current and a key component of the global overturning circulation, which carries heat from the equator to high northerly latitudes. The scientists show that with just 2 months of observations, the GOCE estimate of the North Atlantic circulation is superior to that obtained from 8 years of data from the Gravity Recovery and Climate Experiment (GRACE) satellite. In many places, the current speeds estimated from the GOCE data compare well with those obtained from in situ observations, providing strong validation of the GOCE mission design. Accumulation of data as the mission progresses could lead to a more accurate and detailed map of the ocean's currents. (Geophysical Research Letters, doi:10.1029/2010GL045633, 2011)</div></front></TEI><affiliations><list><country><li>États-Unis</li></country></list><tree><country name="États-Unis"><noRegion><name sortKey="Tretkoff, Ernie" sort="Tretkoff, Ernie" uniqKey="Tretkoff E" first="Ernie" last="Tretkoff">Ernie Tretkoff</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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