The neutral density or empirical neutral density is a density variable used in oceanography, introduced in 1997 by David R. Jackett and Trevor McDougall.It is a function of the three state variables (salinity, temperature, and pressure) and the geographical location (longitude and latitude). It has the typical units of density (M/V).Isosurfaces of form “neutral density surfaces”, which are closely aligned with the "neutral tangent plane". It is widely believed, although this has yet to be rigorously proven, that the flow in the deep ocean is almost entirely aligned with the neutral tangent plane, and strong lateral mixing occurs along this plane ("epineutral mixing") vs weak mixing across this plane ("dianeutral mixing").These surfaces are widely used in water mass analyses. Neutral
| Attributes | Values |
|---|
| rdfs:label
| - Neutraldichte (de)
- Densità neutra (it)
- Neutral density (en)
|
| rdfs:comment
| - Mithilfe der Neutraldichte werden in der Ozeanographie Flächen beschrieben, entlang derer sich ein Wasserpaket im tiefen Ozean bewegt. Das Konzept der Neutraldichte wurde 1997 von David R. Jackett und Trevor McDougall entworfen. Die Neutraldichte hat die Einheit von Dichte und ist abhängig von Salzgehalt, Temperatur, Druck, Ort (den geographischen Koordinaten) und außerdem dem Zustand des umgebenden Ozeans. (de)
- The neutral density or empirical neutral density is a density variable used in oceanography, introduced in 1997 by David R. Jackett and Trevor McDougall.It is a function of the three state variables (salinity, temperature, and pressure) and the geographical location (longitude and latitude). It has the typical units of density (M/V).Isosurfaces of form “neutral density surfaces”, which are closely aligned with the "neutral tangent plane". It is widely believed, although this has yet to be rigorously proven, that the flow in the deep ocean is almost entirely aligned with the neutral tangent plane, and strong lateral mixing occurs along this plane ("epineutral mixing") vs weak mixing across this plane ("dianeutral mixing").These surfaces are widely used in water mass analyses. Neutral (en)
- La densità neutra è una variabile usata in oceanografia, introdotta nel 1997 da David R. Jackett e Trevor J. McDougall. È funzione di tre variabili di stato (salinità, temperatura e pressione) e della localizzazione geografica (longitudine e latitudine); le sue unità di misura sono quelle tipiche della densità (M/V). (it)
|
| dcterms:subject
| |
| Wikipage page ID
| |
| Wikipage revision ID
| |
| Link from a Wikipage to another Wikipage
| |
| Link from a Wikipage to an external page
| |
| sameAs
| |
| dbp:wikiPageUsesTemplate
| |
| bot
| |
| date
| |
| fix-attempted
| |
| has abstract
| - Mithilfe der Neutraldichte werden in der Ozeanographie Flächen beschrieben, entlang derer sich ein Wasserpaket im tiefen Ozean bewegt. Das Konzept der Neutraldichte wurde 1997 von David R. Jackett und Trevor McDougall entworfen. Die Neutraldichte hat die Einheit von Dichte und ist abhängig von Salzgehalt, Temperatur, Druck, Ort (den geographischen Koordinaten) und außerdem dem Zustand des umgebenden Ozeans. Weil sich Wasser entlang von Flächen gleicher Neutraldichte („Neutraldichteflächen“) bewegt, sind diese Flächen hilfreich dabei, die Ausbreitung von Wassermassen und deren laterale Durchmischung zu analysieren. Während kleinskalige Prozesse nahe der Oberfläche, wo potentielle Dichte und Neutraldichte nur geringfügig voneinander abweichen, meist ausreichend gut anhand der potentiellen Dichte erklärt werden können, ist das für großskalige Wasserbewegungen in der Tiefe nicht der Fall: Stellt man sich beispielsweise die Bewegung eines Wasserpakets entlang gleichbleibender Neutraldichte in einem ozeanweiten Kreisstrom vor, wird sich Wasserpaket nach einmaligen Umlauf zwar nicht genau am Ausgangspunkt, sondern in etwa 10 m Entfernung davon befinden. Wird jedoch potentielle Dichte verwendet, um den Weg des Wasserpakets zu bestimmen, kann der Unterschied zwischen Ausgangspunkt und Endpunkt nach einmaligem Umlauf sogar mehrere 100 m betragen – ein weitaus größerer Fehler. (de)
- The neutral density or empirical neutral density is a density variable used in oceanography, introduced in 1997 by David R. Jackett and Trevor McDougall.It is a function of the three state variables (salinity, temperature, and pressure) and the geographical location (longitude and latitude). It has the typical units of density (M/V).Isosurfaces of form “neutral density surfaces”, which are closely aligned with the "neutral tangent plane". It is widely believed, although this has yet to be rigorously proven, that the flow in the deep ocean is almost entirely aligned with the neutral tangent plane, and strong lateral mixing occurs along this plane ("epineutral mixing") vs weak mixing across this plane ("dianeutral mixing").These surfaces are widely used in water mass analyses. Neutral density is a density variable that depends on the particular state of the ocean, and hence is also a function of time, though this is often ignored. In practice, its construction from a given hydrographic dataset is achieved by means of a computational code (available for Matlab and Fortran), that contains the computational algorithm developed by Jackett and McDougall. Use of this code is currently restricted to the present day ocean. (en)
- La densità neutra è una variabile usata in oceanografia, introdotta nel 1997 da David R. Jackett e Trevor J. McDougall. È funzione di tre variabili di stato (salinità, temperatura e pressione) e della localizzazione geografica (longitudine e latitudine); le sue unità di misura sono quelle tipiche della densità (M/V). Le superfici di livello della formano le "superfici di densità neutra", che sono le naturali interfacce degli strati che stratificano la circolazione abissale, assieme a cui si instaura il mescolamento laterale negli oceani. Queste superfici sono utilizzate nell'analisi dei dati oceanici e nei modelli della circolazione oceanica.La formazione delle superfici di densità neutra a partire da una data osservazione idrografica, richiede soltanto il ricorso a un codice computazionale (disponibile per Matlab e Fortran) che contiene l'algoritmo computazionale sviluppato da Jackett e McDougall. (it)
|
| prov:wasDerivedFrom
| |
| page length (characters) of wiki page
| |
| foaf:isPrimaryTopicOf
| |
| is Link from a Wikipage to another Wikipage
of | |
| is Wikipage redirect
of | |
| is Wikipage disambiguates
of | |
| is foaf:primaryTopic
of | |
![[RDF Data]](/fct/images/sw-rdf-blue.png)
![[cxml]](/fct/images/cxml_doc.png)
![[csv]](/fct/images/csv_doc.png)
![[text]](/fct/images/ntriples_doc.png)
![[turtle]](/fct/images/n3turtle_doc.png)
![[ld+json]](/fct/images/jsonld_doc.png)
![[rdf+json]](/fct/images/json_doc.png)
![[rdf+xml]](/fct/images/xml_doc.png)
![[atom+xml]](/fct/images/atom_doc.png)
![[html]](/fct/images/html_doc.png)