Mass, heat and nutrient fluxes in the Atlantic Ocean determined by inverse methods
Thesis (Ph. D.)--Joint Program in Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1988. Includes bibliographical references. Inverse methods are applied to historical hydrographic data to address...
Main Author: | |
---|---|
Other Authors: | , , , , |
Format: | Thesis |
Language: | English |
Published: |
Massachusetts Institute of Technology
1988
|
Subjects: | |
Online Access: | http://hdl.handle.net/1721.1/58500 |
id |
ftmit:oai:dspace.mit.edu:1721.1/58500 |
---|---|
record_format |
openpolar |
spelling |
ftmit:oai:dspace.mit.edu:1721.1/58500 2023-06-11T04:07:13+02:00 Mass, heat and nutrient fluxes in the Atlantic Ocean determined by inverse methods Nutrient fluxes in the Atlantic Ocean determined by inverse methods, Mass, heat and Rintoul, Stephen R. (Stephen Rich) Carl Wunsch. Woods Hole Oceanographic Institution. Joint Program in Oceanography Woods Hole Oceanographic Institution Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences 1988 287 leaves application/pdf http://hdl.handle.net/1721.1/58500 eng eng Massachusetts Institute of Technology http://hdl.handle.net/1721.1/58500 19834181 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 Joint Program in Oceanography Earth Atmospheric and Planetary Sciences Woods Hole Oceanographic Institution Thesis 1988 ftmit 2023-05-29T08:37:13Z Thesis (Ph. D.)--Joint Program in Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1988. Includes bibliographical references. Inverse methods are applied to historical hydrographic data to address two aspects of the general circulation of the Atlantic Ocean. The method allows conservation statements for mass and other properties, along with a variety of other constraints, to be combined in a dynamically consistent way to estimate the absolute velocity field and associated property transports. The method is first used to examine the exchange of mass and heat between the South Atlantic and the neighboring ocean basins. The Antarctic Circumpolar Current (ACC) carries a surplus of intermediate water into the South Atlantic through Drake Passage which is compensated by a surplus of deep and bottom water leaving the basin south of Africa. As a result, the ACC loses .25+.18x10' 5 W of heat in crossing the Atlantic. At 32*S the meridional flux of heat is .25±.19x1015 W equatorward, consistent in sign but smaller in magnitude than other recent estimates. This heat flux is carried primarily by a meridional overturning cell in which the export of 17 Sv of North Atlantic Deep Water (NADW) is balanced by an equatorward return flow equally split between the surface layers, and the intermediate and bottom water. No "leak" of warm Indian Ocean thermocline water is necessary to account for the equatorward heat flux across 32*S; in fact, a large transfer of warm water from the Indian Ocean to the Atlantic is found to be inconsistent with the present data set. Together these results demonstrate that the Atlantic as a whole acts to convert intermediate water to deep and bottom water, and thus that the global thermohaline cell associated with the formation and export of NADW is closed primarily by a "cold water path," in which deep water leaving the Atlantic ultimately returns as intermediate water entering the basin through ... Thesis Antarc* Antarctic Drake Passage NADW North Atlantic Deep Water North Atlantic DSpace@MIT (Massachusetts Institute of Technology) Antarctic The Antarctic Drake Passage Indian |
institution |
Open Polar |
collection |
DSpace@MIT (Massachusetts Institute of Technology) |
op_collection_id |
ftmit |
language |
English |
topic |
Joint Program in Oceanography Earth Atmospheric and Planetary Sciences Woods Hole Oceanographic Institution |
spellingShingle |
Joint Program in Oceanography Earth Atmospheric and Planetary Sciences Woods Hole Oceanographic Institution Rintoul, Stephen R. (Stephen Rich) Mass, heat and nutrient fluxes in the Atlantic Ocean determined by inverse methods |
topic_facet |
Joint Program in Oceanography Earth Atmospheric and Planetary Sciences Woods Hole Oceanographic Institution |
description |
Thesis (Ph. D.)--Joint Program in Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1988. Includes bibliographical references. Inverse methods are applied to historical hydrographic data to address two aspects of the general circulation of the Atlantic Ocean. The method allows conservation statements for mass and other properties, along with a variety of other constraints, to be combined in a dynamically consistent way to estimate the absolute velocity field and associated property transports. The method is first used to examine the exchange of mass and heat between the South Atlantic and the neighboring ocean basins. The Antarctic Circumpolar Current (ACC) carries a surplus of intermediate water into the South Atlantic through Drake Passage which is compensated by a surplus of deep and bottom water leaving the basin south of Africa. As a result, the ACC loses .25+.18x10' 5 W of heat in crossing the Atlantic. At 32*S the meridional flux of heat is .25±.19x1015 W equatorward, consistent in sign but smaller in magnitude than other recent estimates. This heat flux is carried primarily by a meridional overturning cell in which the export of 17 Sv of North Atlantic Deep Water (NADW) is balanced by an equatorward return flow equally split between the surface layers, and the intermediate and bottom water. No "leak" of warm Indian Ocean thermocline water is necessary to account for the equatorward heat flux across 32*S; in fact, a large transfer of warm water from the Indian Ocean to the Atlantic is found to be inconsistent with the present data set. Together these results demonstrate that the Atlantic as a whole acts to convert intermediate water to deep and bottom water, and thus that the global thermohaline cell associated with the formation and export of NADW is closed primarily by a "cold water path," in which deep water leaving the Atlantic ultimately returns as intermediate water entering the basin through ... |
author2 |
Carl Wunsch. Woods Hole Oceanographic Institution. Joint Program in Oceanography Woods Hole Oceanographic Institution Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
format |
Thesis |
author |
Rintoul, Stephen R. (Stephen Rich) |
author_facet |
Rintoul, Stephen R. (Stephen Rich) |
author_sort |
Rintoul, Stephen R. (Stephen Rich) |
title |
Mass, heat and nutrient fluxes in the Atlantic Ocean determined by inverse methods |
title_short |
Mass, heat and nutrient fluxes in the Atlantic Ocean determined by inverse methods |
title_full |
Mass, heat and nutrient fluxes in the Atlantic Ocean determined by inverse methods |
title_fullStr |
Mass, heat and nutrient fluxes in the Atlantic Ocean determined by inverse methods |
title_full_unstemmed |
Mass, heat and nutrient fluxes in the Atlantic Ocean determined by inverse methods |
title_sort |
mass, heat and nutrient fluxes in the atlantic ocean determined by inverse methods |
publisher |
Massachusetts Institute of Technology |
publishDate |
1988 |
url |
http://hdl.handle.net/1721.1/58500 |
geographic |
Antarctic The Antarctic Drake Passage Indian |
geographic_facet |
Antarctic The Antarctic Drake Passage Indian |
genre |
Antarc* Antarctic Drake Passage NADW North Atlantic Deep Water North Atlantic |
genre_facet |
Antarc* Antarctic Drake Passage NADW North Atlantic Deep Water North Atlantic |
op_relation |
http://hdl.handle.net/1721.1/58500 19834181 |
op_rights |
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 |
_version_ |
1768380173668843520 |