東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Causes and Consequences of the Ocean...

Britten, Gregory.

FindBook

Google Book

Amazon

博客來

Causes and Consequences of the Ocean's Biological Pump.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Causes and Consequences of the Ocean's Biological Pump./
作者:	Britten, Gregory.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	115 p.
附註:	Source: Dissertations Abstracts International, Volume: 80-06, Section: B.
Contained By:	Dissertations Abstracts International80-06B.
標題:	Chemical Oceanography. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10931862
ISBN:	9780438745087

Causes and Consequences of the Ocean's Biological Pump.
Britten, Gregory.

Causes and Consequences of the Ocean's Biological Pump. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 115 p.

Source: Dissertations Abstracts International, Volume: 80-06, Section: B.

Thesis (Ph.D.)--University of California, Irvine, 2018.

This item must not be sold to any third party vendors.

The production of organic matter at the ocean's surface, its transport, and subsequent remineralization in the ocean interior maintains a vertical carbon and nutrient gradient that sequesters atmospheric CO2, controls the distribution of dissolved oxygen, and modulates the flux of nutrients to the euphotic zone that fuels marine ecosystems. Collectively we refer to the set of processes maintaining these gradients as the biological pump and they are the central focus of this thesis. To advance our understanding of the biological pump, this thesis uses models to analyze and quantify individual processes within the larger biological pump system. Chapter 1 introduces the key processes at question and outlines the specific goals of each research chapter. Chapter 2 uses empirical models and a global database of in-situ observations to examine the environmental drivers of carbon export efficiency, defined as the fraction of organic matter production that is transported from the surface to the interior. We find significant regional variability in the relationship between export efficiency and environmental parameters that are shown to have important consequences for the prediction of global export. Chapter 3 further develops empirical models of carbon export efficiency with a focus on regional export variability in the Southern Ocean. We find new evidence that silica controls Southern Ocean export efficiency via interactions with ocean temperature. Chapter 4 uses a global ocean circulation and biogeochemistry model to examine the sensitivity of the global oxygen distribution to changes in the depth at which sinking organic matter is remineralized. Model experiments demonstrate that raising the remineralization depth of organic matter leads to net oxygen uptake and simultaneous expansion of oxygen minimum zones. Chapter 5 examines the consequences of long term climate-driven changes in the biological pump for the productivity of marine ecosystems and fisheries. The thesis concludes in Chapter 6 with a discussion of the challenges and opportunities in understanding the biological pump in a changing climate, along with my recommendations for follow up research.

ISBN: 9780438745087Subjects--Topical Terms:

1674678
Chemical Oceanography.

Causes and Consequences of the Ocean's Biological Pump.
LDR:03267nmm a2200337 4500 001 2207011
005 20190913102431.5
008 201008s2018 ||||||||||||||||| ||eng d
020 $a 9780438745087
035 $a (MiAaPQ)AAI10931862
035 $a (MiAaPQ)uci:15312
035 $a AAI10931862
040 $a MiAaPQ $c MiAaPQ
100 1 $a Britten, Gregory. $3 3433939
245 1 0 $a Causes and Consequences of the Ocean's Biological Pump.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 115 p.
500 $a Source: Dissertations Abstracts International, Volume: 80-06, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Primeau, Francois W.
502 $a Thesis (Ph.D.)--University of California, Irvine, 2018.
506 $a This item must not be sold to any third party vendors.
520 $a The production of organic matter at the ocean's surface, its transport, and subsequent remineralization in the ocean interior maintains a vertical carbon and nutrient gradient that sequesters atmospheric CO2, controls the distribution of dissolved oxygen, and modulates the flux of nutrients to the euphotic zone that fuels marine ecosystems. Collectively we refer to the set of processes maintaining these gradients as the biological pump and they are the central focus of this thesis. To advance our understanding of the biological pump, this thesis uses models to analyze and quantify individual processes within the larger biological pump system. Chapter 1 introduces the key processes at question and outlines the specific goals of each research chapter. Chapter 2 uses empirical models and a global database of in-situ observations to examine the environmental drivers of carbon export efficiency, defined as the fraction of organic matter production that is transported from the surface to the interior. We find significant regional variability in the relationship between export efficiency and environmental parameters that are shown to have important consequences for the prediction of global export. Chapter 3 further develops empirical models of carbon export efficiency with a focus on regional export variability in the Southern Ocean. We find new evidence that silica controls Southern Ocean export efficiency via interactions with ocean temperature. Chapter 4 uses a global ocean circulation and biogeochemistry model to examine the sensitivity of the global oxygen distribution to changes in the depth at which sinking organic matter is remineralized. Model experiments demonstrate that raising the remineralization depth of organic matter leads to net oxygen uptake and simultaneous expansion of oxygen minimum zones. Chapter 5 examines the consequences of long term climate-driven changes in the biological pump for the productivity of marine ecosystems and fisheries. The thesis concludes in Chapter 6 with a discussion of the challenges and opportunities in understanding the biological pump in a changing climate, along with my recommendations for follow up research.
590 $a School code: 0030.
650 4 $a Chemical Oceanography. $3 1674678
650 4 $a Biological oceanography. $3 2122748
650 4 $a Biogeochemistry. $3 545717
690 $a 0403
690 $a 0416
690 $a 0425
710 2 $a University of California, Irvine. $b Earth System Science. $3 3174192
773 0 $t Dissertations Abstracts International $g 80-06B.
790 $a 0030
791 $a Ph.D.
792 $a 2018
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10931862