東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Investigations of the Biogeochemical...

Chan, Eric W.

Linked to FindBook

Google Book

Amazon

博客來

Investigations of the Biogeochemical and Stable Isotope Kinetics of Aerobic Methane Oxidation in Seawater.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Investigations of the Biogeochemical and Stable Isotope Kinetics of Aerobic Methane Oxidation in Seawater./
Author:	Chan, Eric W.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
Description:	157 p.
Notes:	Source: Dissertation Abstracts International, Volume: 79-04(E), Section: B.
Contained By:	Dissertation Abstracts International79-04B(E).
Subject:	Chemical oceanography. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10642926
ISBN:	9780355563160

Investigations of the Biogeochemical and Stable Isotope Kinetics of Aerobic Methane Oxidation in Seawater.
Chan, Eric W.

Investigations of the Biogeochemical and Stable Isotope Kinetics of Aerobic Methane Oxidation in Seawater. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 157 p.

Source: Dissertation Abstracts International, Volume: 79-04(E), Section: B.

Thesis (Ph.D.)--University of Rochester, 2017.

This item is not available from ProQuest Dissertations & Theses.

The largest global reservoir of CH4 that interacts with the ocean occurs in and below the seafloor. Investigations at locations of CH4 bubble emission from the seafloor have led to hypotheses surrounding whether the emission of methane from this massive reservoir will change with changing climate. Yet, aerobic methane oxidation in seawater may limit the atmospheric expression of seafloor-released methane. Here we examine aerobic methane oxidation (AMO) kinetics with three ultimate goals of determining: (1) the amounts of reactants required to remove a quantity of methane from seawater, (2) the fundamental isotopic fractionation parameters, and (3) how these properties may be spatially different.

ISBN: 9780355563160Subjects--Topical Terms:

516760
Chemical oceanography.

Investigations of the Biogeochemical and Stable Isotope Kinetics of Aerobic Methane Oxidation in Seawater.
LDR:03490nmm a2200325 4500 001 2201130
005 20190405084458.5
008 201008s2017 ||||||||||||||||| ||eng d
020 $a 9780355563160
035 $a (MiAaPQ)AAI10642926
035 $a (MiAaPQ)rochester:11564
035 $a AAI10642926
040 $a MiAaPQ $c MiAaPQ
100 1 $a Chan, Eric W. $3 3427856
245 1 0 $a Investigations of the Biogeochemical and Stable Isotope Kinetics of Aerobic Methane Oxidation in Seawater.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2017
300 $a 157 p.
500 $a Source: Dissertation Abstracts International, Volume: 79-04(E), Section: B.
500 $a Adviser: John D. Kessler.
502 $a Thesis (Ph.D.)--University of Rochester, 2017.
506 $a This item is not available from ProQuest Dissertations & Theses.
520 $a The largest global reservoir of CH4 that interacts with the ocean occurs in and below the seafloor. Investigations at locations of CH4 bubble emission from the seafloor have led to hypotheses surrounding whether the emission of methane from this massive reservoir will change with changing climate. Yet, aerobic methane oxidation in seawater may limit the atmospheric expression of seafloor-released methane. Here we examine aerobic methane oxidation (AMO) kinetics with three ultimate goals of determining: (1) the amounts of reactants required to remove a quantity of methane from seawater, (2) the fundamental isotopic fractionation parameters, and (3) how these properties may be spatially different.
520 $a As methane is oxidized microbially, 12CH4 is used at a slightly faster rate than 13CH4 thus causing fractionation. The magnitude of the isotopic fractionation is unique for this microbial oxidation process, so these systematic changes in isotopic abundances have been used to quantify the extent and rate of oxidation [e.g. Leonte et al., 2017]. To investigate the chemical and isotopic kinetics of AMO in seawater, a unique mesocosm incubation system (MIS) was developed with a Dissolved Gas Analyzer System (DGAS) to monitor the chemical and isotopic changes in real-time. This work examined AMO at three different environments, Sleeping Dragon seep field, Mississippi Canyon 118 (MC 118) (Lat. = 28° 51.129'N, Long. --88° 29.51'W) as well as inside the Hudson Canyon (HC), US Atlantic Margin at the upper boundary of the methane clathrate stability zone (Lat. = 39° 32.705'N, Long. = 72° 24.259'W) and outside the HC, not directly influenced by the methane seepage (Lat. = 39° 17.236'N, Long. = 72° 12.080'W). These results show that in both environments, methane was consumed aggressively after an initial lag, but the start of aggressive consumption varied based on location. The biogeochemical data can be used to determine a "Redfield ratio" for AMO. The ratio for MC118 was (123 +/- 73) : (182 +/- 111) : (15 +/- 11) : (1) (DO:CH 4:N:P), which was found to be statistically consistent between the different environments. This ratio can be used to estimate the total capacity for AMO following a methane release. Isotopic fractionation factors were determined to change with different chemical conditions but did not display changes in isotopic fractionation with the stage of microbial growth.
590 $a School code: 0188.
650 4 $a Chemical oceanography. $3 516760
650 4 $a Biogeochemistry. $3 545717
690 $a 0403
690 $a 0425
710 2 $a University of Rochester. $b Arts and Sciences. $3 3171976
773 0 $t Dissertation Abstracts International $g 79-04B(E).
790 $a 0188
791 $a Ph.D.
792 $a 2017
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10642926