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Past and Potential Drivers of the Hydroxyl Radical (OH), With Implications for Warming and Public Health in a Future Hydrogen Economy
Past and Potential Drivers of the Hydroxyl Radical (OH), With Implications for Warming and...
Past and Potential Drivers of the Hydroxyl Radical (OH), With Implications for Warming and Public Health in a Future Hydrogen Economy

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202102959
ISBN  
9798280749375
DDC  
551.5
저자명  
Chua, Glen.
서명/저자  
Past and Potential Drivers of the Hydroxyl Radical (OH), With Implications for Warming and Public Health in a Future Hydrogen Economy
발행사항  
[Sl] : Princeton University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
196 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
주기사항  
Advisor: Horowitz, Larry W.
학위논문주기  
Thesis (Ph.D.)--Princeton University, 2025.
초록/해제  
요약The hydroxyl radical (OH) is an atmospheric detergent, removing air pollutants and near-term climate forcers (NTCFs) such as ozone (O3) precursors as well as greenhouse gases like methane (CH4). Thus, understanding how it is changing and responding to its various drivers is important for air quality and climate.In the historical (1980-2014) CMIP6 simulation, we find that OH has increased in the Geophysical Fluid Dynamics Laboratory (GFDL) AM4.1 CCM mostly driven by increasing nitrogen oxide (NOx) emissions. In future CMIP6 scenarios, across multiple CCMS, we find that, in a high emission scenario (SSP3-7.0), while [OH] declines and CH4 lifetime increases due to the dominant chemical effects of changing NTCF and CH4, future climate change has a positive impact on OH and therefore a negative impact of CH4 lifetime, leading to a negative CH4-related climate feedback. Also, while air pollution controls alone further exacerbates the OH decline in SSP3-7.0, CH4 mitigation can effectively reverse the OH decline. These results suggest potential climate trade-offs from solely targeting air pollution and highlight the importance of CH4 mitigation to maximize future climate and air quality benefits.One potential OH driver is increasing H2 emissions from a future H2 economy. H2 and CH4 have similar composition and climate impacts, primarily because they share the same OH chemical sink. Hence, we find that CH4 mitigation can offset the impact of H2 leakage. In particular, the H2 warming impact is roughly a third that of CH4 per mass of emissions, and this stays relatively constant under a wide range of background CH4 emissions. Furthermore, when considering simultaneous changes in other NTCFs in a H2 economy, CH4 mitigation plays an important role in ensuring that there are net benefits to climate and air quality. We also find that, similar to CH4 emissions, H2 leakage increases surface O3, thus increasing O3-attributable deaths from cardiovascular and respiratory diseases, leading to increased economic cost. On a per-mass emission basis, H2 causes approximately half the health-related damages of CH4. These findings emphasize the key role of CH4 mitigation in offsetting unintended negative climate and health consequences of future H2 leakage.
일반주제명  
Atmospheric chemistry
일반주제명  
Atmospheric sciences
일반주제명  
Environmental health
일반주제명  
Climate change
일반주제명  
Public health
키워드  
Health-related damages
키워드  
Hydrogen
키워드  
Hydroxyl radical
키워드  
Methane
키워드  
Ozone
기타저자  
Princeton University Atmospheric and Oceanic Sciences
기본자료저록  
Dissertations Abstracts International. 86-12B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aChua,  Glen.▼0(orcid)0000-0002-6002-0957
■24510▼aPast  and  Potential  Drivers  of  the  Hydroxyl  Radical  (OH),  With  Implications  for  Warming  and  Public  Health  in  a  Future  Hydrogen  Economy
■260    ▼a[Sl]▼bPrinceton  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a196  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-12,  Section:  B.
■500    ▼aAdvisor:  Horowitz,  Larry  W.
■5021  ▼aThesis  (Ph.D.)--Princeton  University,  2025.
■520    ▼aThe  hydroxyl  radical  (OH)  is  an  atmospheric  detergent,  removing  air  pollutants  and  near-term  climate  forcers  (NTCFs)  such  as  ozone  (O3)  precursors  as  well  as  greenhouse  gases  like  methane  (CH4).  Thus,  understanding  how  it  is  changing  and  responding  to  its  various  drivers  is  important  for  air  quality  and  climate.In  the  historical  (1980-2014)  CMIP6  simulation,  we  find  that  OH  has  increased  in  the  Geophysical  Fluid  Dynamics  Laboratory  (GFDL)  AM4.1  CCM  mostly  driven  by  increasing  nitrogen  oxide  (NOx)  emissions.  In  future  CMIP6  scenarios,  across  multiple  CCMS,  we  find  that,  in  a  high  emission  scenario  (SSP3-7.0),  while  [OH]  declines  and  CH4  lifetime  increases  due  to  the  dominant  chemical  effects  of  changing  NTCF  and  CH4,  future  climate  change  has  a  positive  impact  on  OH  and  therefore  a  negative  impact  of  CH4  lifetime,  leading  to  a  negative  CH4-related  climate  feedback.  Also,  while  air  pollution  controls  alone  further  exacerbates  the  OH  decline  in  SSP3-7.0,  CH4  mitigation  can  effectively  reverse  the  OH  decline.  These  results  suggest  potential  climate  trade-offs  from  solely  targeting  air  pollution  and  highlight  the  importance  of  CH4  mitigation  to  maximize  future  climate  and  air  quality  benefits.One  potential  OH  driver  is  increasing  H2  emissions  from  a  future  H2  economy.  H2  and  CH4  have  similar  composition  and  climate  impacts,  primarily  because  they  share  the  same  OH  chemical  sink.  Hence,  we  find  that  CH4  mitigation  can  offset  the  impact  of  H2  leakage.  In  particular,  the  H2  warming  impact  is  roughly  a  third  that  of  CH4  per  mass  of  emissions,  and  this  stays  relatively  constant  under  a  wide  range  of  background  CH4  emissions.  Furthermore,  when  considering  simultaneous  changes  in  other  NTCFs  in  a  H2  economy,  CH4  mitigation  plays  an  important  role  in  ensuring  that  there  are  net  benefits  to  climate  and  air  quality.  We  also  find  that,  similar  to  CH4  emissions,  H2  leakage  increases  surface  O3,  thus  increasing  O3-attributable  deaths  from  cardiovascular  and  respiratory  diseases,  leading  to  increased  economic  cost.  On  a  per-mass  emission  basis,  H2  causes  approximately  half  the  health-related  damages  of  CH4.  These  findings  emphasize  the  key  role  of  CH4  mitigation  in  offsetting  unintended  negative  climate  and  health  consequences  of  future  H2  leakage.
■590    ▼aSchool  code:  0181.
■650  4▼aAtmospheric  chemistry
■650  4▼aAtmospheric  sciences
■650  4▼aEnvironmental  health
■650  4▼aClimate  change
■650  4▼aPublic  health
■653    ▼aHealth-related  damages
■653    ▼aHydrogen
■653    ▼aHydroxyl  radical
■653    ▼aMethane
■653    ▼aOzone
■690    ▼a0371
■690    ▼a0725
■690    ▼a0470
■690    ▼a0404
■690    ▼a0573
■71020▼aPrinceton  University▼bAtmospheric  and  Oceanic  Sciences.
■7730  ▼tDissertations  Abstracts  International▼g86-12B.
■790    ▼a0181
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17356591▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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