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Improving the Understanding of Marine Boundary Layer Clouds
Improving the Understanding of Marine Boundary Layer Clouds
Improving the Understanding of Marine Boundary Layer Clouds

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자료유형  
 학위논문 서양
최종처리일시  
20260202103153
ISBN  
9798315700425
DDC  
551.5
저자명  
Cutler, Lauren.
서명/저자  
Improving the Understanding of Marine Boundary Layer Clouds
발행사항  
[Sl] : The University of Arizona, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
96 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-11, Section: B.
주기사항  
Advisor: Zeng, Xubin.
학위논문주기  
Thesis (Ph.D.)--The University of Arizona, 2025.
초록/해제  
요약Marine boundary layer clouds play a key role in the planetary radiation budget and are still a large source of uncertainty within global climate models. One of the main reasons for this uncertainty within global climate predictions is the interaction between aerosols, clouds, and meteorology, which is poorly represented within current global circulation models. This dissertation focuses on improving our understanding of marine boundary layer clouds by (1) reevaluating two foundational relationships (i.e. lower tropospheric stability (LTS) and estimated inversion strength (EIS)) with marine boundary layer clouds, (2) assessing the performance of LTS and EIS as well as additional stability parameters (i.e. estimated cloud-top entrainment index (ECTEI) and cold-air outbreak index (CAO)) at different temporal resolutions using in-situ measurements, reanalysis data, and model output, and (3) creating gridded datasets from aircraft measurements from two aircraft in formation from the Aerosol Cloud meTeorology Interactions oVer the western ATlantic Experiment (ACTIVATE) field campaigns to facilitate comparison of aerosol, cloud, and meteorology variables important to MBL cloud formation and aerosol-cloud-meteorology interactions. A foundation of our understanding of MBL clouds is the seasonal relationships between LTS (Klein and Hartmann, 1993) and EIS (Wood and Bretherton, 2006) with marine boundary layer clouds. In the first part of this dissertation, we re-evaluated the seasonal relationships between LTS and EIS with low cloud amount using three clouds data products. We found that (1) the relationship between LTS and low cloud amount was not consistent across the cloud datasets, (2) EIS does not estimate low cloud amount better than LTS in the midlatitudes, and (3) LTS and EIS are best at predicting stratocumulus clouds among all types of low-level clouds (stratus, stratocumulus, cumulus). These findings are crucial as the relationship with LTS and low-level clouds was used in early parameterizations of global circulation models. Additionally, the relationship with EIS and low cloud fraction is used to tune low level clouds in global circulation models. With these findings from the first part of this dissertation regarding the robustness of the LTS and EIS relationships with low-level clouds, the second part of this dissertation focuses on assessing the performance of LTS and EIS, in addition to other well-known stability parameters (i.e., ECTEI (Kawai et al., 2017) and CAO) with boundary layer clouds at different temporal scales. We found that CAO is the overall best predictor of low cloud fraction across all temporal scales and time periods evaluated in the western North Atlantic region. These findings are important because they demonstrate that the relationship with LTS/EIS and low-level clouds break down at smaller temporal scales. Additionally, the findings from this study improve our understanding of the relationship between marine boundary layer stability and marine boundary layer clouds and may inform future modeling studies as a result. The third part of this dissertation introduces a gridded data product using the two aircraft (King Air and HU-25 Falcon) flown during the ACTIVATE field campaigns from 2020-2022. These aircraft were spatially co-located, with the King Air flying at high altitudes (~9 km) and the Falcon flying at lower altitudes (0.15-3 km), closer to the ocean surface. The King Air launched dropsondes and carried remote sensors (i.e. High-Spectral Resolution LiDAR (HSRL-2) and Research Scanning Polarimeter (RSP)) while the Falcon performed in-situ measurements of trace gases, aerosol particles, clouds, and meteorology. A 0.25° grid resolution for the HSRL-2 and Falcon data was created. The King Air and Falcon datasets provide useful insights into aerosol-cloud-meteorology interactions on their own. However, ACTIVATE provides a unique opportunity to gain new and interesting insights into aerosol-cloud-meteorology interactions because of the two co-located aircraft. Gridding the two aircraft datasets will both allow for more streamlined and easier use of the co-located aircraft, allowing users to leverage the remote sensing data from the King Air and the in-situ measurements from the Falcon together. Additionally, the gridded data will help remove some of the barriers associated with using aircraft measurements for modelers and end users not familiar with the different file formats and caveats associated with using aircraft observations. The dataset will also provide a unique opportunity to gain valuable insights into aerosol-cloud-meteorology interactions for the western North Atlantic and inform future researchers in their development of new field campaigns.
일반주제명  
Atmospheric sciences
일반주제명  
Marine geology
일반주제명  
Aerospace engineering
일반주제명  
Meteorology
키워드  
Marine boundary layer
키워드  
Planetary radiation budget
키워드  
EIS relationships
키워드  
Research Scanning Polarimeter
키워드  
Aircraft measurements
기타저자  
The University of Arizona Atmospheric Sciences
기본자료저록  
Dissertations Abstracts International. 86-11B.
전자적 위치 및 접속  
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MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
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■1001  ▼aCutler,  Lauren.▼0(orcid)0000-0002-1664-4084
■24510▼aImproving  the  Understanding  of  Marine  Boundary  Layer  Clouds
■260    ▼a[Sl]▼bThe  University  of  Arizona▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a96  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-11,  Section:  B.
■500    ▼aAdvisor:  Zeng,  Xubin.
■5021  ▼aThesis  (Ph.D.)--The  University  of  Arizona,  2025.
■520    ▼aMarine  boundary  layer  clouds  play  a  key  role  in  the  planetary  radiation  budget  and  are  still  a  large  source  of  uncertainty  within  global  climate  models.  One  of  the  main  reasons  for  this  uncertainty  within  global  climate  predictions  is  the  interaction  between  aerosols,  clouds,  and  meteorology,  which  is  poorly  represented  within  current  global  circulation  models.  This  dissertation  focuses  on  improving  our  understanding  of  marine  boundary  layer  clouds  by  (1)  reevaluating  two  foundational  relationships  (i.e.  lower  tropospheric  stability  (LTS)  and  estimated  inversion  strength  (EIS))  with  marine  boundary  layer  clouds,  (2)  assessing  the  performance  of  LTS  and  EIS  as  well  as  additional  stability  parameters  (i.e.  estimated  cloud-top  entrainment  index  (ECTEI)  and  cold-air  outbreak  index  (CAO))  at  different  temporal  resolutions  using  in-situ  measurements,  reanalysis  data,  and  model  output,  and  (3)  creating  gridded  datasets  from  aircraft  measurements  from  two  aircraft  in  formation  from  the  Aerosol  Cloud  meTeorology  Interactions  oVer  the  western  ATlantic  Experiment  (ACTIVATE)  field  campaigns  to  facilitate  comparison  of  aerosol,  cloud,  and  meteorology  variables  important  to  MBL  cloud  formation  and  aerosol-cloud-meteorology  interactions. A  foundation  of  our  understanding  of  MBL  clouds  is  the  seasonal  relationships  between  LTS  (Klein  and  Hartmann,  1993)  and  EIS  (Wood  and  Bretherton,  2006)  with  marine  boundary  layer  clouds.  In  the  first  part  of  this  dissertation,  we  re-evaluated  the  seasonal  relationships  between  LTS  and  EIS  with  low  cloud  amount  using  three  clouds  data  products.  We  found  that  (1)  the  relationship  between  LTS  and  low  cloud  amount  was  not  consistent  across  the  cloud  datasets,  (2)  EIS  does  not  estimate  low  cloud  amount  better  than  LTS  in  the  midlatitudes,  and  (3)  LTS  and  EIS  are  best  at  predicting  stratocumulus  clouds  among  all  types  of  low-level  clouds  (stratus,  stratocumulus,  cumulus).  These  findings  are  crucial  as  the  relationship  with  LTS  and  low-level  clouds  was  used  in  early  parameterizations  of  global  circulation  models.  Additionally,  the  relationship  with  EIS  and  low  cloud  fraction  is  used  to  tune  low  level  clouds  in  global  circulation  models. With  these  findings  from  the  first  part  of  this  dissertation  regarding  the  robustness  of  the  LTS  and  EIS  relationships  with  low-level  clouds,  the  second  part  of  this  dissertation  focuses  on  assessing  the  performance  of  LTS  and  EIS,  in  addition  to  other  well-known  stability  parameters  (i.e.,  ECTEI  (Kawai  et  al.,  2017)  and  CAO)  with  boundary  layer  clouds  at  different  temporal  scales.  We  found  that  CAO  is  the  overall  best  predictor  of  low  cloud  fraction  across  all  temporal  scales  and  time  periods  evaluated  in  the  western  North  Atlantic  region.  These  findings  are  important  because  they  demonstrate  that  the  relationship  with  LTS/EIS  and  low-level  clouds  break  down  at  smaller  temporal  scales.  Additionally,  the  findings  from  this  study  improve  our  understanding  of  the  relationship  between  marine  boundary  layer  stability  and  marine  boundary  layer  clouds  and  may  inform  future  modeling  studies  as  a  result. The  third  part  of  this  dissertation  introduces  a  gridded  data  product  using  the  two  aircraft  (King  Air  and  HU-25  Falcon)  flown  during  the  ACTIVATE  field  campaigns  from  2020-2022.  These  aircraft  were  spatially  co-located,  with  the  King  Air  flying  at  high  altitudes  (~9  km)  and  the  Falcon  flying  at  lower  altitudes  (0.15-3  km),  closer  to  the  ocean  surface.  The  King  Air  launched  dropsondes  and  carried  remote  sensors  (i.e.  High-Spectral  Resolution  LiDAR  (HSRL-2)  and  Research  Scanning  Polarimeter  (RSP))  while  the  Falcon  performed  in-situ  measurements  of  trace  gases,  aerosol  particles,  clouds,  and  meteorology.  A  0.25°  grid  resolution  for  the  HSRL-2  and  Falcon  data  was  created.  The  King  Air  and  Falcon  datasets  provide  useful  insights  into  aerosol-cloud-meteorology  interactions  on  their  own.  However,  ACTIVATE  provides  a  unique  opportunity  to  gain  new  and  interesting  insights  into  aerosol-cloud-meteorology  interactions because  of  the  two  co-located  aircraft.  Gridding  the  two  aircraft  datasets  will  both  allow  for  more  streamlined  and  easier  use  of  the  co-located  aircraft,  allowing  users  to  leverage  the  remote  sensing  data  from  the  King  Air  and  the  in-situ  measurements  from  the  Falcon  together.  Additionally,  the  gridded  data  will  help  remove  some  of  the  barriers  associated  with  using  aircraft  measurements  for  modelers  and  end  users  not  familiar  with  the  different  file  formats  and  caveats  associated  with  using  aircraft  observations.  The  dataset  will  also  provide  a  unique  opportunity  to  gain  valuable  insights  into  aerosol-cloud-meteorology  interactions  for  the  western  North  Atlantic  and  inform  future  researchers  in  their  development  of  new  field  campaigns.
■590    ▼aSchool  code:  0009.
■650  4▼aAtmospheric  sciences
■650  4▼aMarine  geology
■650  4▼aAerospace  engineering
■650  4▼aMeteorology
■653    ▼aMarine  boundary  layer  
■653    ▼aPlanetary  radiation  budget
■653    ▼aEIS  relationships
■653    ▼aResearch  Scanning  Polarimeter
■653    ▼aAircraft  measurements
■690    ▼a0725
■690    ▼a0556
■690    ▼a0557
■690    ▼a0538
■71020▼aThe  University  of  Arizona▼bAtmospheric  Sciences.
■7730  ▼tDissertations  Abstracts  International▼g86-11B.
■790    ▼a0009
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357239▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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