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Organic Carbon Flux Variations in th...

Wu, Qingting.

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Organic Carbon Flux Variations in the Eastern Equatorial Pacific Over the Last 25,000 Years.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Organic Carbon Flux Variations in the Eastern Equatorial Pacific Over the Last 25,000 Years./
Author:	Wu, Qingting.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
Description:	81 p.
Notes:	Source: Masters Abstracts International, Volume: 83-03.
Contained By:	Masters Abstracts International83-03.
Subject:	Geology. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28716833
ISBN:	9798538102235

Organic Carbon Flux Variations in the Eastern Equatorial Pacific Over the Last 25,000 Years.
Wu, Qingting.

Organic Carbon Flux Variations in the Eastern Equatorial Pacific Over the Last 25,000 Years. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 81 p.

Source: Masters Abstracts International, Volume: 83-03.

Thesis (M.S.)--California State University, Fresno, 2021.

The Eastern Equatorial Pacific (EEP) is symbolized by enhanced primary productivity and oxygen-depleted waters because of intensified upwelling of nutrient-rich subsurface water, making it an ideal region for investigating how biogeochemical systems respond to changing oceanographic conditions over time. This study explores organic carbon flux changes and water masses properties for the EEP over the last 25,000 years with the aid of benthic foraminifera abundance and relative contents of indicative species in the core CDH-26 from the Peru margin. High organic carbon flux and low oxygen concentration in the bottom water are established for the glacial period based on the high abundance of benthic foraminifera and the dominance of low-oxygen-tolerant species. The transition from the glacial to interglacial period is characterized by organic carbon flux maxima and a high share of the infaunal genus Bulimina and epifaunal genus Epistominella, which both indicate hypoxic environments. The interglacial period is marked by the weakened abundance of benthic foraminifera and disappearance of most of the low-oxygen-tolerant species, due to the decreased influx of organic matter to the bottom and/or advection of less aggressive intermediate-depth water masses.

ISBN: 9798538102235Subjects--Topical Terms:

516570
Geology.
Subjects--Index Terms:

Cluster analysis

Organic Carbon Flux Variations in the Eastern Equatorial Pacific Over the Last 25,000 Years.
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245 1 0 $a Organic Carbon Flux Variations in the Eastern Equatorial Pacific Over the Last 25,000 Years.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 81 p.
500 $a Source: Masters Abstracts International, Volume: 83-03.
500 $a Advisor: Richaud, Mathieu.
502 $a Thesis (M.S.)--California State University, Fresno, 2021.
520 $a The Eastern Equatorial Pacific (EEP) is symbolized by enhanced primary productivity and oxygen-depleted waters because of intensified upwelling of nutrient-rich subsurface water, making it an ideal region for investigating how biogeochemical systems respond to changing oceanographic conditions over time. This study explores organic carbon flux changes and water masses properties for the EEP over the last 25,000 years with the aid of benthic foraminifera abundance and relative contents of indicative species in the core CDH-26 from the Peru margin. High organic carbon flux and low oxygen concentration in the bottom water are established for the glacial period based on the high abundance of benthic foraminifera and the dominance of low-oxygen-tolerant species. The transition from the glacial to interglacial period is characterized by organic carbon flux maxima and a high share of the infaunal genus Bulimina and epifaunal genus Epistominella, which both indicate hypoxic environments. The interglacial period is marked by the weakened abundance of benthic foraminifera and disappearance of most of the low-oxygen-tolerant species, due to the decreased influx of organic matter to the bottom and/or advection of less aggressive intermediate-depth water masses.
590 $a School code: 6050.
650 4 $a Geology. $3 516570
650 4 $a Biochemistry. $3 518028
650 4 $a Organic chemistry. $3 523952
650 4 $a Plankton. $3 1299572
650 4 $a Cold. $3 560283
650 4 $a Ocean circulation. $3 544145
650 4 $a Climate change. $2 bicssc $3 2079509
653 $a Cluster analysis
653 $a Foraminifera
653 $a Productivity
690 $a 0372
690 $a 0487
690 $a 0490
690 $a 0404
710 2 $a California State University, Fresno. $b Earth and Environmental Sciences. $3 3768948
773 0 $t Masters Abstracts International $g 83-03.
790 $a 6050
791 $a M.S.
792 $a 2021
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28716833