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Quantification of Methane Emissions From Discrete Sources
Quantification of Methane Emissions From Discrete Sources
Quantification of Methane Emissions From Discrete Sources

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211151428
ISBN  
9798382777382
DDC  
628
저자명  
Chulakadabba, Apisada.
서명/저자  
Quantification of Methane Emissions From Discrete Sources
발행사항  
[Sl] : Harvard University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
140 p
주기사항  
Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
주기사항  
Advisor: Wofsy, Steven C.
학위논문주기  
Thesis (Ph.D.)--Harvard University, 2024.
초록/해제  
요약Various point source methane quantification approaches enable comprehensive estimation of methane emissions, which is essential for effective methane monitoring and mitigating strategies. This study uses remote sensing data from projects like MethaneAIR and MethaneSAT to develop robust quantification methods for methane emissions. We explore techniques such as modified integrated mass enhancement (mIME), divergence integral (DI), ratio method, and Geostatistical Inverse Model (GIM) approach, considering factors like the nature of the sources, their size, the background noise, and topography.In the first chapter, we aim to develop rigorous point source quantification approaches for MethaneAIR and MethaneSAT satellites. We explore different techniques to quantify methane emissions from discrete sources and devise a method based on large eddy simulations. Although initially tested on high-resolution Chinese satellites due to the early stage of the Methane AIR and MethaneSAT projects, these algorithms pave the way for faster development of methods tailored to our projects.In the second chapter, we apply our quantification methods to controlled release experiments and evaluate their performance on MethaneAIR data. Our findings show good agreement between estimated and released emissions as well as mIME and DI quantification methods. We develop a decision tree to determine the most suitable method for specific scenarios, enhancing our under- standing of method limitations and informing the development of MethaneSAT algorithms.The final chapter focuses on a detection limit analysis of MethaneAIR to evaluate MethaneSAT's potential performance. Using large eddy simulations, we estimate MethaneSAT's detection limit as a function of noise across different resolutions. Additionally, we demonstrated successful point source estimation based on the GIM, bridging the gap between point source and area source quantification techniques. The findings better prepare us for MethaneSAT data analysis.In conclusion, this study lays the foundation for methane point source quantification for the MethaneAIR and MethaneSAT projects. The lessons learned extend beyond our projects; they can allow the appropriate selection of methane emission quantification approaches for various scenarios.
일반주제명  
Environmental engineering
일반주제명  
Environmental science
일반주제명  
Remote sensing
키워드  
Greenhouse gas
키워드  
Large eddy simulation
키워드  
Methane
키워드  
Divergence integral
키워드  
Geostatistical Inverse Model
기타저자  
Harvard University Engineering and Applied Sciences - Engineering Sciences
기본자료저록  
Dissertations Abstracts International. 85-12B.
전자적 위치 및 접속  
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■035    ▼a(MiAaPQ)AAI31295030
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■1001  ▼aChulakadabba,  Apisada.▼0(orcid)0000-0001-8180-4200
■24510▼aQuantification  of  Methane  Emissions  From  Discrete  Sources
■260    ▼a[Sl]▼bHarvard  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a140  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-12,  Section:  B.
■500    ▼aAdvisor:  Wofsy,  Steven  C.
■5021  ▼aThesis  (Ph.D.)--Harvard  University,  2024.
■520    ▼aVarious  point  source  methane  quantification  approaches  enable  comprehensive  estimation  of  methane  emissions,  which  is  essential  for  effective  methane  monitoring  and  mitigating  strategies.  This  study  uses  remote  sensing  data  from  projects  like  MethaneAIR  and  MethaneSAT  to  develop  robust  quantification  methods  for  methane  emissions.  We  explore  techniques  such  as  modified  integrated  mass  enhancement  (mIME),  divergence  integral  (DI),  ratio  method,  and  Geostatistical  Inverse  Model  (GIM)  approach,  considering  factors  like  the  nature  of  the  sources,  their  size,  the  background  noise,  and  topography.In  the  first  chapter,  we  aim  to  develop  rigorous  point  source  quantification  approaches  for  MethaneAIR  and  MethaneSAT  satellites.  We  explore  different  techniques  to  quantify  methane  emissions  from  discrete  sources  and  devise  a  method  based  on  large  eddy  simulations.  Although  initially  tested  on  high-resolution  Chinese  satellites  due  to  the  early  stage  of  the  Methane  AIR  and  MethaneSAT  projects,  these  algorithms  pave  the  way  for  faster  development  of  methods  tailored  to  our  projects.In  the  second  chapter,  we  apply  our  quantification  methods  to  controlled  release  experiments  and  evaluate  their  performance  on  MethaneAIR  data.  Our  findings  show  good  agreement  between  estimated  and  released  emissions  as  well  as  mIME  and  DI  quantification  methods.  We  develop  a  decision  tree  to  determine  the  most  suitable  method  for  specific  scenarios,  enhancing  our  under-  standing  of  method  limitations  and  informing  the  development  of  MethaneSAT  algorithms.The  final  chapter  focuses  on  a  detection  limit  analysis  of  MethaneAIR  to  evaluate  MethaneSAT's  potential  performance.  Using  large  eddy  simulations,  we  estimate  MethaneSAT's  detection  limit  as  a  function  of  noise  across  different  resolutions.  Additionally,  we  demonstrated  successful  point  source  estimation  based  on  the  GIM,  bridging  the  gap  between  point  source  and  area  source  quantification  techniques.  The  findings  better  prepare  us  for  MethaneSAT  data  analysis.In  conclusion,  this  study  lays  the  foundation  for  methane  point  source  quantification  for  the  MethaneAIR  and  MethaneSAT  projects.  The  lessons  learned  extend  beyond  our  projects;  they  can  allow  the  appropriate  selection  of  methane  emission  quantification  approaches  for  various  scenarios.
■590    ▼aSchool  code:  0084.
■650  4▼aEnvironmental  engineering
■650  4▼aEnvironmental  science
■650  4▼aRemote  sensing
■653    ▼aGreenhouse  gas
■653    ▼aLarge  eddy  simulation
■653    ▼aMethane
■653    ▼aDivergence  integral
■653    ▼aGeostatistical  Inverse  Model
■690    ▼a0775
■690    ▼a0768
■690    ▼a0799
■71020▼aHarvard  University▼bEngineering  and  Applied  Sciences  -  Engineering  Sciences.
■7730  ▼tDissertations  Abstracts  International▼g85-12B.
■790    ▼a0084
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161673▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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