본문

서브메뉴

Land Surface-Convective Precipitation Interactions and Mechanisms for the Midwest U.S. Corn Belt
Land Surface-Convective Precipitation Interactions and Mechanisms for the Midwest U.S. Cor...
Land Surface-Convective Precipitation Interactions and Mechanisms for the Midwest U.S. Corn Belt

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105323
ISBN  
9798297672482
DDC  
551.57
저자명  
Chapman, Connor J.
서명/저자  
Land Surface-Convective Precipitation Interactions and Mechanisms for the Midwest U.S. Corn Belt
발행사항  
[Sl] : The Pennsylvania State University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
279 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
주기사항  
Advisor: Carleton, Andrew M.
학위논문주기  
Thesis (Ph.D.)--The Pennsylvania State University, 2025.
초록/해제  
요약Recent climatic research for the heavily agricultural central United States suggests a land surface - land use/land cover (LULC), soil moisture (SM) - role in warm-season convective clouds and precipitation. However, these associations are more well understood for the semi-arid U.S. Great Plains than for the humid lowlands and agriculturally-intensive Midwest Corn Belt (CB). To better determine the role of the land surface in CB deep convection, I determine the associations - and potential interactions - of weather radar-derived convective precipitation initiation (CVPI) with observational (e.g., satellite-derived, flux tower) and combined modeledobserved reanalyzed ("reanalysis") data on LULC, SM, and atmospheric conditions for the 2013- 2023 warm seasons (1 May - 30 September). I emphasize two CB domains, each featuring considerable heterogeneity in LULC yet different in terms of relief: a topographically varied area in south-central Indiana, and a flatter portion of central Illinois. To account for the warm-season phenological progression, I use transpiration data to divide the warm season into three subseasons (early, mid, and late) of varying length. I also stratify the CVPI-land surface association results into two categories based on the threshold of atmospheric instability, or Convectively Available Potential Energy (CAPE): synoptically-primed (SP; high CAPE) and synopticallybenign (SB; low CAPE). The first two research investigations, documented in Chapters 2 and 3 reveal Corn Belt CVPI composite associations with LULC and SM, respectively; I assess the likely physical processes - and inferred mechanisms - underlying these associations on shorter time-space scales using a case-event approach in Chapter 4.In Chapter 2, I determine LULC types, and their associated buffer zones for the two CB domains. Statistically-significant associations of CVPI with crop-urban buffer zones on SB days during the mid-season, and with croplands on SB days during the late-season, imply that LULC compensates for the lack of synoptic forcing in generating deep convection. Moreover, the broad similarity in results between the two domains indicates a more dominant role of LULC versus relief in Corn Belt CVPI. In Chapter 3, I determine Corn Belt CVPI-SM statistical associations -and identify a potential lead-lag, or feedback (i.e., SM a CVPI a SM) - for SM content (low to high) and the associated spatial gradients for the whole 11-year period and the wettest year (2015) and driest year (2023) within the study period. I find more frequent statistically significant associations of CVPI with SM during the early-season, and less for the late-season. In particular, statistically-significant early-season associations of CVPI on SP days with strong SM gradients, and on SB days with weak SM gradients, short SM gradients, and high SM, imply that SM can both increase the likelihood of deep convection on days with weak synoptic forcing or enhance the convective precipitation occurring in the presence of strong synoptic forcing. Moreover, physically - but not necessarily statistically - significant results involving SM attributes appear in other warm-season trimesters, and co-occur with LULC in urban environments. Similar to Chapter 2, an overall greater influence of SM on CVPI versus relief is evident for the CB.Chapter 4 documents the case-event (n = 9) evaluation - using reanalysis data - of the likely physical mechanisms underpinning CVPI, in context of the empirical results obtained in Chapters 2 and 3. My statistical validation of reanalysis heat fluxes using flux-tower data justifies their use in both climate-scale and case-study investigations. The presence of three physical processes: 1) strong upward vertical transport of surface moisture, 2) horizontal convergence of the low-level winds at the CVPI location, overlain by 3) synoptically-driven airflow advecting moisture and/or heat into the CB, are indicated. The CB land surface-CVPI statistical associations and their likely physical mechanisms demonstrated in my three research chapters, can be used to 1) help improve warm-season precipitation forecasting in the central CB (e.g., for agricultural activity), and 2) provide a framework for subsequent numerical modeling experiments of present and near-future land surface-CVP interactions for that region.
일반주제명  
Precipitation
일반주제명  
Humidity
일반주제명  
Statistical significance
일반주제명  
Seasons
일반주제명  
Land use planning
일반주제명  
Meteorology
기타저자  
The Pennsylvania State University.
기본자료저록  
Dissertations Abstracts International. 87-04B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008260126s2025        us                              c    eng  d
■001000017360212
■00520260202105323
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798297672482
■035    ▼a(MiAaPQ)AAI32289617
■035    ▼a(MiAaPQ)PennState27801cjc358
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a551.57
■1001  ▼aChapman,  Connor  J.
■24510▼aLand  Surface-Convective  Precipitation  Interactions  and  Mechanisms  for  the  Midwest  U.S.  Corn  Belt
■260    ▼a[Sl]▼bThe  Pennsylvania  State  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a279  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-04,  Section:  B.
■500    ▼aAdvisor:  Carleton,  Andrew  M.
■5021  ▼aThesis  (Ph.D.)--The  Pennsylvania  State  University,  2025.
■520    ▼aRecent  climatic  research  for  the  heavily  agricultural  central  United  States  suggests  a  land  surface  -  land  use/land  cover  (LULC),  soil  moisture  (SM)  -  role  in  warm-season  convective  clouds  and  precipitation.  However,  these  associations  are  more  well  understood  for  the  semi-arid  U.S.  Great  Plains  than  for  the  humid  lowlands  and  agriculturally-intensive  Midwest  Corn  Belt  (CB).  To  better  determine  the  role  of  the  land  surface  in  CB  deep  convection,  I  determine  the  associations  -  and  potential  interactions  -  of  weather  radar-derived  convective  precipitation  initiation  (CVPI)  with  observational  (e.g.,  satellite-derived,  flux  tower)  and  combined  modeledobserved  reanalyzed  ("reanalysis")  data  on  LULC,  SM,  and  atmospheric  conditions  for  the  2013-  2023  warm  seasons  (1  May  -  30  September).  I  emphasize  two  CB  domains,  each  featuring  considerable  heterogeneity  in  LULC  yet  different  in  terms  of  relief:  a  topographically  varied  area  in  south-central  Indiana,  and  a  flatter  portion  of  central  Illinois.  To  account  for  the  warm-season  phenological  progression,  I  use  transpiration  data  to  divide  the  warm  season  into  three  subseasons  (early,  mid,  and  late)  of  varying  length.  I  also  stratify  the  CVPI-land  surface  association  results  into  two  categories  based  on  the  threshold  of  atmospheric  instability,  or  Convectively  Available  Potential  Energy  (CAPE):  synoptically-primed  (SP;  high  CAPE)  and  synopticallybenign  (SB;  low  CAPE).  The  first  two  research  investigations,  documented  in  Chapters  2  and  3  reveal  Corn  Belt  CVPI  composite  associations  with  LULC  and  SM,  respectively;  I  assess  the  likely  physical  processes  -  and  inferred  mechanisms  -  underlying  these  associations  on  shorter  time-space  scales  using  a  case-event  approach  in  Chapter  4.In  Chapter  2,  I  determine  LULC  types,  and  their  associated  buffer  zones  for  the  two  CB  domains.  Statistically-significant  associations  of  CVPI  with  crop-urban  buffer  zones  on  SB  days  during  the  mid-season,  and  with  croplands  on  SB  days  during  the  late-season,  imply  that  LULC  compensates  for  the  lack  of  synoptic  forcing  in  generating  deep  convection.  Moreover,  the  broad  similarity  in  results  between  the  two  domains  indicates  a  more  dominant  role  of  LULC  versus  relief  in  Corn  Belt  CVPI.  In  Chapter  3,  I  determine  Corn  Belt  CVPI-SM  statistical  associations  -and  identify  a  potential  lead-lag,  or  feedback  (i.e.,  SM  a  CVPI  a  SM)  -  for  SM  content  (low  to  high)  and  the  associated  spatial  gradients  for  the  whole  11-year  period  and  the  wettest  year  (2015)  and  driest  year  (2023)  within  the  study  period.  I  find  more  frequent  statistically  significant  associations  of  CVPI  with  SM  during  the  early-season,  and  less  for  the  late-season.  In  particular,  statistically-significant  early-season  associations  of  CVPI  on  SP  days  with  strong  SM  gradients,  and  on  SB  days  with  weak  SM  gradients,  short  SM  gradients,  and  high  SM,  imply  that  SM  can  both  increase  the  likelihood  of  deep  convection  on  days  with  weak  synoptic  forcing  or  enhance  the  convective  precipitation  occurring  in  the  presence  of  strong  synoptic  forcing.  Moreover,  physically  -  but  not  necessarily  statistically  -  significant  results  involving  SM  attributes  appear  in  other  warm-season  trimesters,  and  co-occur  with  LULC  in  urban  environments.  Similar  to  Chapter  2,  an  overall  greater  influence  of  SM  on  CVPI  versus  relief  is  evident  for  the  CB.Chapter  4  documents  the  case-event  (n  =  9)  evaluation  -  using  reanalysis  data  -  of  the  likely  physical  mechanisms  underpinning  CVPI,  in  context  of  the  empirical  results  obtained  in  Chapters  2  and  3.  My  statistical  validation  of  reanalysis  heat  fluxes  using  flux-tower  data  justifies  their  use  in  both  climate-scale  and  case-study  investigations.  The  presence  of  three  physical  processes:  1)  strong  upward  vertical  transport  of  surface  moisture,  2)  horizontal  convergence  of  the  low-level  winds  at  the  CVPI  location,  overlain  by  3)  synoptically-driven  airflow  advecting  moisture  and/or  heat  into  the  CB,  are  indicated.  The  CB  land  surface-CVPI  statistical  associations  and  their  likely  physical  mechanisms  demonstrated  in  my  three  research  chapters,  can  be  used  to  1)  help  improve  warm-season  precipitation  forecasting  in  the  central  CB  (e.g.,  for  agricultural  activity),  and  2)  provide  a  framework  for  subsequent  numerical  modeling  experiments  of  present  and  near-future  land  surface-CVP  interactions  for  that  region.
■590    ▼aSchool  code:  0176.
■650  4▼aPrecipitation
■650  4▼aHumidity
■650  4▼aStatistical  significance
■650  4▼aSeasons
■650  4▼aLand  use  planning
■650  4▼aMeteorology
■690    ▼a0536
■690    ▼a0557
■71020▼aThe  Pennsylvania  State  University.
■7730  ▼tDissertations  Abstracts  International▼g87-04B.
■790    ▼a0176
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360212▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

미리보기

내보내기

chatGPT토론

Ai 추천 관련 도서


    신착도서 더보기
    최근 3년간 통계입니다.

    소장정보

    • 예약
    • 소재불명신고
    • 나의폴더
    • 우선정리요청
    • 비도서대출신청
    • 야간 도서대출신청
    소장자료
    등록번호 청구기호 소장처 대출가능여부 대출정보
    TF19282 전자도서 대출가능 마이폴더 부재도서신고 비도서대출신청 야간 도서대출신청

    * 대출중인 자료에 한하여 예약이 가능합니다. 예약을 원하시면 예약버튼을 클릭하십시오.

    해당 도서를 다른 이용자가 함께 대출한 도서

    관련 인기도서

    로그인 후 이용 가능합니다.