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Carl Wunsch. Siberlin, Charlotte A. Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences. Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences 2010-10-29T18:40:44Z 2010-10-29T18:40:44Z 2010 2010 http://hdl.handle.net/1721.1/59790 671401457 Thesis (S.M. in Climate Physics and Chemistry)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2010. Cataloged from PDF version of thesis. Includes bibliographical references (p. 131-134). Quantifying time-responses of the ocean to passive and active tracers is critical when interpreting paleodata from sediment cores. Surface-injected tracers are not spreading instantaneously or uniformly throughout the ocean. To obtain insights into these time-scales, a transition matrix is used to compute successive states of a passive tracer concentration in the global ocean. Times to equilibrium are longer than 1500 years for any one region in the global ocean and, near the equilibrium, concentration gradients give time-lags from hundreds to thousands of years between the Atlantic and Pacific bottom, depending on the injection region and the nature of the boundary condition. Ice volume (glacio-eustatic) corrections to deep-sea and surface values cannot be assumed instantaneous, challenging previous paleodata interpretations from sediment cores. Preliminary results on time-responses of the ocean to active tracers, using a global circulation model limited to the North Atlantic box, show no major differences between a freshwater and a dye input, at least during the first 50 years of the experiment and for a small amount of freshwater. by Charlotte Siberlin. S.M. in Climate Physics and Chemistry 134 p. eng Massachusetts Institute of Technology M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 Earth, Atmospheric, and Planetary Sciences. Time-scales of passive tracers in the ocean with paleoapplications Thesis application/pdf false Publication unknown unknown <Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="32c4484f-9710-42f0-a9f4-48986bebf734"> <Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type> <Language>eng</Language> <Title>Time-scales of passive tracers in the ocean with paleoapplications</Title> <PublishedIn> <Publication> </Publication> </PublishedIn> <PublicationDate>2010</PublicationDate> <Authors> <Author> <DisplayName>Siberlin, Charlotte A.</DisplayName> <Affiliation> <OrgUnit> </OrgUnit> </Affiliation> </Author> </Authors> <Editors> </Editors> <Publishers> <Publisher> <DisplayName>Massachusetts Institute of Technology</DisplayName> <OrgUnit /> </Publisher> </Publishers> <License>http://dspace.mit.edu/handle/1721.1/7582</License> <Keyword>Earth, Atmospheric, and Planetary Sciences.</Keyword> <Abstract>Quantifying time-responses of the ocean to passive and active tracers is critical when interpreting paleodata from sediment cores. Surface-injected tracers are not spreading instantaneously or uniformly throughout the ocean. To obtain insights into these time-scales, a transition matrix is used to compute successive states of a passive tracer concentration in the global ocean. Times to equilibrium are longer than 1500 years for any one region in the global ocean and, near the equilibrium, concentration gradients give time-lags from hundreds to thousands of years between the Atlantic and Pacific bottom, depending on the injection region and the nature of the boundary condition. Ice volume (glacio-eustatic) corrections to deep-sea and surface values cannot be assumed instantaneous, challenging previous paleodata interpretations from sediment cores. Preliminary results on time-responses of the ocean to active tracers, using a global circulation model limited to the North Atlantic box, show no major differences between a freshwater and a dye input, at least during the first 50 years of the experiment and for a small amount of freshwater.</Abstract> <Access xmlns="http://purl.org/coar/access_right" > </Access> </Publication>