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Whether ENSO Is a Valid Analogue for Tropical Pacific Circulation Change during the Quaternary - Coursework Example

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"Whether ENSO Is a Valid Analogue for Tropical Pacific Circulation Change during the Quaternary" paper focuses on El Niño, the warm phase of an oscillation over the tropical central and eastern Pacific which warms or cool the waters or weaken or increase the strength of the pressures plying there. …
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Whether ENSO Is a Valid Analogue for Tropical Pacific Circulation Change during the Quaternary
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Download file to see previous pages Large scale zonal (east-west) overturning of the air occurs across the equatorial Pacific Ocean due to convection (heat and mass transfer through fluids) and by advection(larger scale fluids transports matter and heat. The Walker Circulation (i.e.; wind circulation) shows global variations in circulation, clouds, and precipitation and is used to measure the scale of El Nino. Bjerknes in studies from 1966 to 1972 showed that the surface pressure alteration caused variation in the rain and sea surface temperature(SST) in equatorial eastern Pacific and in particular over the Peruvian coast.

Isotope analysis was done using a Finnigan Delta-Plus –Advantage mass spectrometer couple and Finnigan Gas Bench II. 18O, 13C (±1, N = 637). were measured. Paleo temperatures were reconstructed from Mg/Ca ratios. Temperature estimation was done from 2.1; 3.7; 4.8 to 5.5Ma time periods and between 3.7 to 4.8 Ma. The analysis was done as mentioned in Materials and methods In the Pliocene Mixed-Layer Oceanography for Site 1241, multiproxy studies were done. Sediments were studied. Paleotemperature equation was taken of planktons as specified by Anand et al. (2003). Proxy records were smoothed using the least-squared error method as shown by Cleveland, in 1979 and a smoothing factor of 10% oo was applied. At site 1241 Tiedemann et al., (2007) conducted LEG 202 studies.

Multiproxy studies of the Lago Frias (northern Patagonia) sediments show variations in glacial clay and slit. Sedimentological evidence from Lake Mascardi taken for the 1992-1998 interval point show ENSO signal here at 2.5 and 3.0 years intervals and provides new insight into complex forcing mechanism namely anthropogenic. LEG 202 syntheses were conducted. Millennial-scale climate and biogeochemical systems of the southern Pacific and Chile are closely aligned to those of Antarctica and southern oceans, extending to the equatorial Pacific.   ...Download file to see next pagesRead More
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