ingranaggio della circolazione termoalina degli oceani. D’altra parte, l’upwel- ling costiero può indurre intensi flussi di calore nell’oceano, rendendo questo. Il picnoclino (dal greco πυκνός (puknòs), “denso”) è un sottile strato o una superficie che strati scorrono l’uno sull’altro dando luogo alla circolazione oceanica profonda (circolazione termoalina) con grande influenza sul clima globale. Anche gli oceani d’altra parte formano un tipo esclusivo di cella convettiva, ovvero la circolazione termoalina che è influenzata dal calore (termo) e dalla.

Author: Vogami Dacage
Country: Cameroon
Language: English (Spanish)
Genre: Automotive
Published (Last): 5 May 2016
Pages: 389
PDF File Size: 7.10 Mb
ePub File Size: 7.65 Mb
ISBN: 878-4-62882-381-4
Downloads: 31630
Price: Free* [*Free Regsitration Required]
Uploader: Daishicage

URL consultato il 10 marzo archiviato dall’ url originale il 21 luglio Zavialov, Physical oceanography of the dying Aral Sea circolazoine,p. Palm trees grow on the west coast of Ireland, but not in Newfoundland which is further south. Altri progetti Wikimedia Commons.

The ocean may be the primary cause of variability over times ranging from years to decades, and it may have helped modulate ice-age climate.

Circolazione termoalina, profonda e delle alte latitudini. V is the vertical integral of the northward velocity, and W0 is the velocity circolazipne the base of the thermocline. Reynolds, Accuracy of in situ sea surface temperatures used to calibrate infrared satellite measurements PDFin Journal of Geophysical Researchvol.

There the surface water releases heat and water to the atmosphere and citcolazione water becomes sufficiently dense that it sinks to the bottom in the Norwegian and Greenland Seas.

Vedi le condizioni d’uso per i dettagli. The deep water later upwells in other regions and in other oceans, and eventually makes its way back to the Gulf Stream and the termoalinw Atlantic.

Once the water sinks below the mixed layer, temperature and salinity can change termaolina by mixing with adjacent water masses. Loading SlideShow in 5 Seconds.

  EWON 2005 CD PDF

During the last ice age, periodic surges of icebergs reduced salinity and reduced the meridional overturning circulation, causing the polar front to move southward and keeping warm water south of Spain. From Woods Hole Oceanographic Institution.

Temperatura superficiale marina – Wikipedia

La fatturazione delle operazioni e la detrazione IVA. Data from cores through circllazione Greenland ice sheet 1deep-sea sediments 2,3and alpine-lake sediments 4 indicate that: Some returns southward at the surface. Theory for the Deep Circulation To describe the simplest aspects of the flow, we begin with the Sverdrup equation applied to a bottom current of thickness H in an ocean of constant depth: Manifestazioni sistemiche delle epatopatie. Estratto da ” https: Observations of Hermoalina circulation Water masses T-S plots are used to delineate water masses and their geographical distribution, to describe mixing among teemoalina masses, and to infer motion of water in the deep ocean.

Importance of Deep Circulation The contrast between the cold deep water and the warm surface waters determines the stratification of the oceans. Download Presentation Connecting to Server. Meteorologia Oceanografia Climatologia Mutamenti climatici. A few depths are noted next to data points.

Geerts, Lake Effect Snow. The return to normal salinity does termoalinw cause the circulation to turn on. The volume of deep water is far larger than the volume of surface water. Result of the differential heating and cooling, and freshening and salting.

Thus water from a particular region has a particular temperature associated with a particular salinity, and the relationship changes little as the water moves through the deep ocean.

T-S plot of data collected at various latitudes circolazionee the western basins of the south Atlantic. The circulation has two stable states.

Similar fluctuations during the last interglacial appear to have caused rapid, large changes in climate. Cool water flows along the bottom and upwells towards low latitudes.


Temperatura superficiale marina

La temperatura superficiale marina, proprio come la temperatura dell’aria, varia al variare dell’altezza del sole sull’orizzonte variazione giornalierama in misura molto minore a causa del maggiore calore specifico dell’acqua [11]. Menu di navigazione Strumenti personali Accesso non effettuato discussioni contributi registrati entra. Quinto Orazio Flacco. The arrows mark the assumed direction of the flow in the cores.

Thermohaline circulation – Wikidata

Once the circulation is shut off, the system switches to the second stable state. Heat carried by the Gulf Stream and the north Atlantic drift warms Europe. The same data, but salinity is plotted as a function of temperature in a T-S plot.

Description Statistics Report Circolazione termoalina, profonda e delle alte latitudini. Email Presentation to Friend. Temperature and salinity measured at hydrographic stations on either side of the Gulf Stream.

Collect Leads new Upload Login. Metabolismo delle proteine. From Lynn and Reid Le misure di temperatura superficiale del mare si limitano alla porzione superiore del mare nota come near-surface layer, alla lettera, strato vicino alla superficie [2].

The Bottom plot is a rough indication of temperature in the region, but the scales are not the same.

File:Circulacion termohalina.jpg

Although currents in the deep ocean are relatively weak, they have transports comparable to the surface transports. Da Wikipedia, l’enciclopedia libera. Note that the flow is constrained by the deep mid-ocean ridge system. RevisitedSpringer,p. Mixing of two water types of the same density L and G produces water that is denser Twrmoalina than either water type.