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Dynamics of methane ebullition from a peat monolith revealed from a dynamic flux chamber system

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TitleInfo
Title
Dynamics of methane ebullition from a peat monolith revealed from a dynamic flux chamber system
Name (type = personal)
NamePart (type = family)
Yu
NamePart (type = given)
Zhongjie
NamePart (type = date)
1986-
DisplayForm
Zhongjie Yu
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Slater
NamePart (type = given)
Lee
DisplayForm
Lee Slater
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
Schafer
NamePart (type = given)
Karina
DisplayForm
Karina Schafer
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Reeve
NamePart (type = given)
Andrew
DisplayForm
Andrew Reeve
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
outside member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (type = corporate)
NamePart
Graduate School - Newark
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2014
DateOther (qualifier = exact); (type = degree)
2014-01
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
Methane (CH4) ebullition in northern peatlands is poorly quantified in part due to its high spatiotemporal variability. In this study, we employed a continuous measurement approach to better understand the coupling between CH4 ebullition fluxes and subsurface gas bubble dynamics and to examine potential triggering effects of atmospheric pressure and temperature on ebullitive CH4 releases. A dynamic flux chamber system (DFC), consisting of a flow-through gas chamber and a fast methane analyzer (LI-COR 7700), was used to continuously measure CH4 fluxes from a monolith of near-surface Sphagnum peat over eight weeks. By using a graphical separation method, episodic ebullition fluxes were extracted from total flux recorded, and the timing and CH4 content of individual ebullition events identified. Coincident transmission ground penetrating radar (GPR) measurements of gas content and dissolved CH4 concentrations in pore water were also acquired at three depths (upper, middle, and lower) within the monolith. Estimated episodic ebullition fluxes were not sensitive to the uncertainties in steady flux quantification associated with the graphical model and the application of the DFC had minimal disturbance on air-peat CH4 exchange. Episodic and steady ebullition fluxes, constrained by modeled diffusion fluxes using Fick’s law and the bulk CH4 concentrations in peat, were estimated as on average 38% and 36% of the total fluxes over the entire study period, respectively. The observations of gas content variations within the three layers along with the timing of episodic ebullition fluxes support the existence of an ebullition threshold regulating CH4 ebullition. However, a larger threshold (gas content of 0.14 m3•m-3) was found for the middle and lower layers, suggesting that multiple mechanisms related to the depth variation of peat structure were responsible for the complex behavior of episodic CH4 ebullition. Temperature variation (23 ̊C to 27 ̊C) was likely only responsible for small episodic ebullition events from the upper peat layer, while large ebullition events from the deeper layers were most likely driven by drops in atmospheric pressure.
Subject (authority = RUETD)
Topic
Environmental Science
Subject (authority = ETD-LCSH)
Topic
Methane
Subject (authority = ETD-LCSH)
Topic
Peatlands
Subject (authority = ETD-LCSH)
Topic
Peatland ecology
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_5280
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
x, 58 p. : ill.
Note (type = degree)
M.S.
Note (type = bibliography)
Includes bibliographical references
Note (type = vita)
Includes vita
Note (type = statement of responsibility)
by Zhongjie Yu
RelatedItem (type = host)
TitleInfo
Title
Graduate School - Newark Electronic Theses and Dissertations
Identifier (type = local)
rucore10002600001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/T3QF8R07
Genre (authority = ExL-Esploro)
ETD graduate
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Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Yu
GivenName
Zhongjie
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2014-01-02 22:19:26
AssociatedEntity
Name
Zhongjie Yu
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - Newark
AssociatedObject
Type
License
Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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Technical

RULTechMD (ID = TECHNICAL1)
ContentModel
ETD
OperatingSystem (VERSION = 5.1)
windows xp
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