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Particle flux transformation in the ...

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Particle flux transformation in the mesopelagic water column: Process analysis and global balance.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Particle flux transformation in the mesopelagic water column: Process analysis and global balance./
Author:	Guidi, Lionel.
Description:	169 p.
Notes:	Advisers: George Jackson; Gabriel Gorsky.
Contained By:	Dissertation Abstracts International69-07B.
Subject:	Biology, Oceanography. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3321694
ISBN:	9780549720935

Particle flux transformation in the mesopelagic water column: Process analysis and global balance.
Guidi, Lionel.

Particle flux transformation in the mesopelagic water column: Process analysis and global balance. - 169 p.

Advisers: George Jackson; Gabriel Gorsky.

Thesis (Ph.D.)--Texas A&M University, 2008.

Marine aggregates are an important means of carbon transfers downwards to the deep ocean as well as an important nutritional source for benthic organism communities that are the ultimate recipients of the flux. During these last 10 years, data on size distribution of particulate matter have been collected in different oceanic provinces using an Underwater Video Profiler. The cruise data include simultaneous analyses of particle size distributions as well as additional physical and biological measurements of water properties through the water column.

ISBN: 9780549720935Subjects--Topical Terms:

783691
Biology, Oceanography.

Particle flux transformation in the mesopelagic water column: Process analysis and global balance.
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020 $a 9780549720935
035 $a (UMI)AAI3321694
035 $a AAI3321694
040 $a UMI $c UMI
100 1 $a Guidi, Lionel. $3 1019164
245 1 0 $a Particle flux transformation in the mesopelagic water column: Process analysis and global balance.
300 $a 169 p.
500 $a Advisers: George Jackson; Gabriel Gorsky.
500 $a Source: Dissertation Abstracts International, Volume: 69-07, Section: B, page: 4017.
502 $a Thesis (Ph.D.)--Texas A&M University, 2008.
520 $a Marine aggregates are an important means of carbon transfers downwards to the deep ocean as well as an important nutritional source for benthic organism communities that are the ultimate recipients of the flux. During these last 10 years, data on size distribution of particulate matter have been collected in different oceanic provinces using an Underwater Video Profiler. The cruise data include simultaneous analyses of particle size distributions as well as additional physical and biological measurements of water properties through the water column.
520 $a First, size distributions of large aggregates have been compared to simultaneous measurements of particle flux observed in sediment traps. We related sediment trap compositional data to particle size (d) distributions to estimate their vertical fluxes (F) using simple power relationships ( F = A·db). The spatial resolution of sedimentation processes allowed by the use of in situ particle sizing instruments lead to a more detailed study of the role of physical processes in vertical flux.
520 $a Second, evolution of the aggregate size distributions with depth was related to overlying primary production and phytoplankton size-distributions on a global scale. A new clustering technique was developed to partition the profiles of aggregate size distributions. Six clusters were isolated. Profiles with a high proportion of large aggregates were found in high-productivity waters while profiles with a high proportion of small aggregates were located in low-productivity waters. The aggregate size and mass flux in the mesopelagic layer were correlated to the nature of primary producers (micro-, nano-, picophytoplankton fractions) and to the amount of integrated chlorophyll a in the euphotic layer using a multiple regression technique on principal components.
520 $a Finally, a mesoscale area in the North Atlantic Ocean was studied to emphasize the importance of the physical structure of the water column on the horizontal and vertical distribution of particulate matter. The seasonal change in the abundance of aggregates in the upper 1000 m was consistent with changes in the composition and intensity of the particulate flux recorded in sediment traps. In an area dominated by eddies, surface accumulation of aggregates and export down to 1000 m occured at mesoscale distances (<100 km).
590 $a School code: 0803.
650 4 $a Biology, Oceanography. $3 783691
690 $a 0416
710 2 $a Texas A&M University. $3 718977
773 0 $t Dissertation Abstracts International $g 69-07B.
790 $a 0803
790 1 0 $a Gorsky, Gabriel, $e advisor
790 1 0 $a Jackson, George, $e advisor
791 $a Ph.D.
792 $a 2008
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3321694