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Cloudy with a Chance of Microphysics: Modeling Droplet Collisions for the Climate Scale
Cloudy with a Chance of Microphysics: Modeling Droplet Collisions for the Climate Scale
Cloudy with a Chance of Microphysics: Modeling Droplet Collisions for the Climate Scale

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202104747
ISBN  
9798290656700
DDC  
551.57
저자명  
de Jong, Emily.
서명/저자  
Cloudy with a Chance of Microphysics: Modeling Droplet Collisions for the Climate Scale
발행사항  
[Sl] : California Institute of Technology, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
140 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-01, Section: B.
주기사항  
Advisor: Schneider, Tapio.
학위논문주기  
Thesis (Ph.D.)--California Institute of Technology, 2025.
초록/해제  
요약Feedbacks between a warming atmosphere, emission of aerosols, and clouds and precipitation are some of the most difficult aspects for climate models to accurately capture. While climate models operate at resolutions of tens or hundreds of kilometers, many of the physics that determine how and where clouds form or precipitate function at the micron droplet scale. Due to this disparity in physical scales, most of these cloud physics must be modeled with only a few approximate quantities and physical equations. These simplifications lead to large uncertainties about climate forcings such as the sensitivity of global warming to human-emitted aerosols.This work presents several promising new techniques for modeling and understanding hydrometeors in the climate system, with a particular focus on processes that involve collisions between droplets. First, I extend a high-complexity high-fidelity Lagrangian microphysics method to represent the process of breakup, in which colliding droplets fragment upon collision. Next, I introduce two new methods which attempt to reduce the assumptions inherent to modeling droplet coalescence, in which colliding droplets combine to form a larger drop. The first method uses a spectral finite element approach, while the second generalizes this technique using a method of moments to create a fully flexible microphysics scheme. Finally, I turn to remote observations of clouds, aerosols, and lightning over busy shipping regions to offer new techniques for quantifying aerosol-cloud interactions from creative data resources. This combination of high-fidelity modeling tools, observational data, and efficient numerical methods offers a path toward improving our understanding of the role of cloud microphysics in our climate system.
일반주제명  
Precipitation
일반주제명  
Physics
일반주제명  
Greenhouse gases
일반주제명  
Atmosphere
일반주제명  
Earth
일반주제명  
Aerosols
일반주제명  
Lightning
일반주제명  
Supercomputers
일반주제명  
Probability
일반주제명  
Atmospheric chemistry
일반주제명  
Fluid mechanics
일반주제명  
Climate change
일반주제명  
Rain
일반주제명  
Mechanical engineering
일반주제명  
Clouds
기타저자  
California Institute of Technology Engineering and Applied Science
기본자료저록  
Dissertations Abstracts International. 87-01B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼ade  Jong,  Emily.
■24510▼aCloudy  with  a  Chance  of  Microphysics:  Modeling  Droplet  Collisions  for  the  Climate  Scale
■260    ▼a[Sl]▼bCalifornia  Institute  of  Technology▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a140  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-01,  Section:  B.
■500    ▼aAdvisor:  Schneider,  Tapio.
■5021  ▼aThesis  (Ph.D.)--California  Institute  of  Technology,  2025.
■520    ▼aFeedbacks  between  a  warming  atmosphere,  emission  of  aerosols,  and  clouds  and  precipitation  are  some  of  the  most  difficult  aspects  for  climate  models  to  accurately  capture.  While  climate  models  operate  at  resolutions  of  tens  or  hundreds  of  kilometers,  many  of  the  physics  that  determine  how  and  where  clouds  form  or  precipitate  function  at  the  micron  droplet  scale.  Due  to  this  disparity  in  physical  scales,  most  of  these  cloud  physics  must  be  modeled  with  only  a  few  approximate  quantities  and  physical  equations.  These  simplifications  lead  to  large  uncertainties  about  climate  forcings  such  as  the  sensitivity  of  global  warming  to  human-emitted  aerosols.This  work  presents  several  promising  new  techniques  for  modeling  and  understanding  hydrometeors  in  the  climate  system,  with  a  particular  focus  on  processes  that  involve  collisions  between  droplets.  First,  I  extend  a  high-complexity  high-fidelity  Lagrangian  microphysics  method  to  represent  the  process  of  breakup,  in  which  colliding  droplets  fragment  upon  collision.  Next,  I  introduce  two  new  methods  which  attempt  to  reduce  the  assumptions  inherent  to  modeling  droplet  coalescence,  in  which  colliding  droplets  combine  to  form  a  larger  drop.  The  first  method  uses  a  spectral  finite  element  approach,  while  the  second  generalizes  this  technique  using  a  method  of  moments  to  create  a  fully  flexible  microphysics  scheme.  Finally,  I  turn  to  remote  observations  of  clouds,  aerosols,  and  lightning  over  busy  shipping  regions  to  offer  new  techniques  for  quantifying  aerosol-cloud  interactions  from  creative  data  resources.  This  combination  of  high-fidelity  modeling  tools,  observational  data,  and  efficient  numerical  methods  offers  a  path  toward  improving  our  understanding  of  the  role  of  cloud  microphysics  in  our  climate  system.
■590    ▼aSchool  code:  0037.
■650  4▼aPrecipitation
■650  4▼aPhysics
■650  4▼aGreenhouse  gases
■650  4▼aAtmosphere
■650  4▼aEarth
■650  4▼aAerosols
■650  4▼aLightning
■650  4▼aSupercomputers
■650  4▼aProbability
■650  4▼aAtmospheric  chemistry
■650  4▼aFluid  mechanics
■650  4▼aClimate  change
■650  4▼aRain
■650  4▼aMechanical  engineering
■650  4▼aClouds
■690    ▼a0371
■690    ▼a0404
■690    ▼a0548
■690    ▼a0204
■690    ▼a0605
■71020▼aCalifornia  Institute  of  Technology▼bEngineering  and  Applied  Science.
■7730  ▼tDissertations  Abstracts  International▼g87-01B.
■790    ▼a0037
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358758▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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