Lake-Effect Rains over Lake Victoria and Their Association with Mesoscale Convective Systems

This article examined rainfall enhancement over Lake Victoria. Estimates of overlake rainfall were compared with rainfall in the surrounding lake catchment. Four satellite products were initially tested against estimates based on gauges or water balance models. These included TRMM 3B43, IMERG V06 Fi...

Celý popis

Uložené v:
Podrobná bibliografia
Vydané v:Journal of hydrometeorology Ročník 22; číslo 6; s. 1353 - 1368
Hlavní autori: Nicholson, Sharon E., Klotter, Douglas, Hartman, Adam T.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: American Meteorological Society 01.06.2021
ISSN:1525-755X, 1525-7541
On-line prístup:Získať plný text
Tagy: Pridať tag
Žiadne tagy, Buďte prvý, kto otaguje tento záznam!
Abstract This article examined rainfall enhancement over Lake Victoria. Estimates of overlake rainfall were compared with rainfall in the surrounding lake catchment. Four satellite products were initially tested against estimates based on gauges or water balance models. These included TRMM 3B43, IMERG V06 Final Run (IMERG-F), CHIRPS2, and PERSIANN-CDR. There was agreement among the satellite products for catchment rainfall but a large disparity among them for overlake rainfall. IMERG-F was clearly an outlier, exceeding the estimate from TRMM 3B43 by 36%. The overestimation by IMERG-F was likely related to passive microwave assessments of strong convection, such as prevails over Lake Victoria. Overall, TRMM 3B43 showed the best agreement with the ‘‘ground truth’’ and was used in further analyses. Overlake rainfall was found to be enhanced compared to catchment rainfall in all months. During the March–May long rains the enhancement varied between 40% and 50%. During the October–December short rains the enhancement varied between 33% and 44%. Even during the two dry seasons the enhancement was at least 20% and over 50% in some months. While the magnitude of enhancement varied from month to month, the seasonal cycle was essentially the same for overlake and catchment rainfall, suggesting that the dominant influence on overlake rainfall is the large-scale environment. The association with mesoscale convective systems (MCSs) was also evaluated. The similarity of the spatial patterns of rainfall and MCS count each month suggested that these produced a major share of rainfall over the lake. Similarity in interannual variability further supported this conclusion.
AbstractList This article examined rainfall enhancement over Lake Victoria. Estimates of overlake rainfall were compared with rainfall in the surrounding lake catchment. Four satellite products were initially tested against estimates based on gauges or water balance models. These included TRMM 3B43, IMERG V06 Final Run (IMERG-F), CHIRPS2, and PERSIANN-CDR. There was agreement among the satellite products for catchment rainfall but a large disparity among them for overlake rainfall. IMERG-F was clearly an outlier, exceeding the estimate from TRMM 3B43 by 36%. The overestimation by IMERG-F was likely related to passive microwave assessments of strong convection, such as prevails over Lake Victoria. Overall, TRMM 3B43 showed the best agreement with the ‘‘ground truth’’ and was used in further analyses. Overlake rainfall was found to be enhanced compared to catchment rainfall in all months. During the March–May long rains the enhancement varied between 40% and 50%. During the October–December short rains the enhancement varied between 33% and 44%. Even during the two dry seasons the enhancement was at least 20% and over 50% in some months. While the magnitude of enhancement varied from month to month, the seasonal cycle was essentially the same for overlake and catchment rainfall, suggesting that the dominant influence on overlake rainfall is the large-scale environment. The association with mesoscale convective systems (MCSs) was also evaluated. The similarity of the spatial patterns of rainfall and MCS count each month suggested that these produced a major share of rainfall over the lake. Similarity in interannual variability further supported this conclusion.
This article examined rainfall enhancement over Lake Victoria. Estimates of over-lake rainfall were compared with rainfall in the surrounding lake catchment. Four satellite products were initially tested against estimates based on gauges or water balance models. These included TRMM 3B43, IMERG V06 Final Run (IMERG-F), CHIRPS2, and PERSIANN-CDR. There was agreement among the satellite products for catchment rainfall but a large disparity among them for over-lake rainfall. IMERG-F was clearly an outlier, exceeding the estimate from TRMM 3B43 by 36%. The overestimation by IMERG-F was likely related to passive microwave assessments of strong convection, such as prevails over Lake Victoria. Overall, TRMM 3B43 showed the best agreement with the "ground truth" and was used in further analyses. Over-lake rainfall was found to be enhanced compared to catchment rainfall in all months. During the March-to-May long rains the enhancement varied between 40% and 50%. During the October-to-December short rains the enhancement varied between 33% and 44%. Even during the two dry seasons the enhancement was at least 20% and over 50% in some months. While the magnitude of enhancement varied from month to month, the seasonal cycle was essentially the same for over-lake and catchment rainfall, suggesting that the dominant influence on over-lake rainfall is the large-scale environment. The association with Mesoscale Convective Systems (MCSs) was also evaluated. The similarity of the spatial patterns of rainfall and MCS count each month suggested that these produced a major share of rainfall over the lake. Similarity in interannual variability further supported this conclusion.
Author Nicholson, Sharon E.
Hartman, Adam T.
Klotter, Douglas
Author_xml – sequence: 1
  givenname: Sharon E.
  surname: Nicholson
  fullname: Nicholson, Sharon E.
– sequence: 2
  givenname: Douglas
  surname: Klotter
  fullname: Klotter, Douglas
– sequence: 3
  givenname: Adam T.
  surname: Hartman
  fullname: Hartman, Adam T.
BookMark eNp9kF9LQjEYh0cYpNZ1V8G-wHR_3TmXopaFEpRFF8GYOxvO9Cy2YfjtO2Z40UVX78vL7_nx8nRAqw61BeCa4B4hUvQfpnM0RhQjTDnvkTPQJoIKJAUnrdMu3i5AJ6U1xpiXpGiD95n-sGjinDUZPmlfJxh2NsLDGb56k0P0Guq6gouV9REOUwrG6-xDDb98XsG5TSEZvbFwFOpd0-J3Fj7vU7bbdAnOnd4ke_U7u-DldrIYTdHs8e5-NJwhwzDPyIhKDDBhUmjDqDNlObCyKLUhFjuGq0IvCbOicKx0S-KKUlJJ6aBizCxdZSvWBeLYa2JIKVqnjM8_P-ao_UYRrA6KVKNIjRXF6qBIkYbr_-E-o9_quP-HuDkS69SYOcWpxJJzKdg3JlV1ww
CitedBy_id crossref_primary_10_1007_s00382_022_06541_5
crossref_primary_10_1029_2023GL103426
crossref_primary_10_1016_j_wace_2021_100391
ContentType Journal Article
Copyright 2021 American Meteorological Society
Copyright_xml – notice: 2021 American Meteorological Society
DBID AAYXX
CITATION
DOI 10.1175/JHM-D-20-0244.1
DatabaseName CrossRef
DatabaseTitle CrossRef
DatabaseTitleList
CrossRef
DeliveryMethod fulltext_linktorsrc
Discipline Geography
Meteorology & Climatology
EISSN 1525-7541
EndPage 1368
ExternalDocumentID 10_1175_JHM_D_20_0244_1
27074475
GroupedDBID 4.4
4P2
5GY
8CJ
8FE
8FH
AAEFR
ABBHK
ABDBF
ABDNZ
ABXSQ
ACUHS
AEKFB
AENEX
AEUPB
AEUYN
AFKRA
AFRAH
AGFAN
ALMA_UNASSIGNED_HOLDINGS
ALQLQ
BENPR
BHPHI
BKSAR
CCPQU
CS3
D1J
E3Z
EAD
EAP
EBS
ECGQY
EDH
EMK
EPL
EST
ESX
FRP
H13
HCIFZ
I-F
IZHOT
JAAYA
JENOY
JKQEH
JLEZI
JLXEF
JPL
JST
LK5
M7R
MV1
OK1
P2P
PCBAR
PHGZM
PHGZT
RWA
RWE
SA0
SJN
SWMRO
TUS
~02
AAYXX
AFFHD
BANNL
CITATION
ID FETCH-LOGICAL-c304t-c5d5601375ac32fc996e789ac1e0f30d8ab13e58f39fb1f89727226d33cbfded3
ISICitedReferencesCount 14
ISICitedReferencesURI http://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=Summon&SrcAuth=ProQuest&DestLinkType=CitingArticles&DestApp=WOS_CPL&KeyUT=000663568900001&url=https%3A%2F%2Fcvtisr.summon.serialssolutions.com%2F%23%21%2Fsearch%3Fho%3Df%26include.ft.matches%3Dt%26l%3Dnull%26q%3D
ISSN 1525-755X
IngestDate Sat Nov 29 06:13:19 EST 2025
Tue Nov 18 22:39:11 EST 2025
Thu Jun 19 21:06:13 EDT 2025
IsDoiOpenAccess false
IsOpenAccess true
IsPeerReviewed true
IsScholarly true
Issue 6
Language English
LinkModel OpenURL
MergedId FETCHMERGED-LOGICAL-c304t-c5d5601375ac32fc996e789ac1e0f30d8ab13e58f39fb1f89727226d33cbfded3
OpenAccessLink https://journals.ametsoc.org/downloadpdf/journals/hydr/22/6/JHM-D-20-0244.1.pdf
PageCount 16
ParticipantIDs crossref_citationtrail_10_1175_JHM_D_20_0244_1
crossref_primary_10_1175_JHM_D_20_0244_1
jstor_primary_27074475
PublicationCentury 2000
PublicationDate 2021-06-01
PublicationDateYYYYMMDD 2021-06-01
PublicationDate_xml – month: 06
  year: 2021
  text: 2021-06-01
  day: 01
PublicationDecade 2020
PublicationTitle Journal of hydrometeorology
PublicationYear 2021
Publisher American Meteorological Society
Publisher_xml – name: American Meteorological Society
SSID ssj0004918
Score 2.4082346
Snippet This article examined rainfall enhancement over Lake Victoria. Estimates of overlake rainfall were compared with rainfall in the surrounding lake catchment....
This article examined rainfall enhancement over Lake Victoria. Estimates of over-lake rainfall were compared with rainfall in the surrounding lake catchment....
SourceID crossref
jstor
SourceType Enrichment Source
Index Database
Publisher
StartPage 1353
Title Lake-Effect Rains over Lake Victoria and Their Association with Mesoscale Convective Systems
URI https://www.jstor.org/stable/27074475
Volume 22
WOSCitedRecordID wos000663568900001&url=https%3A%2F%2Fcvtisr.summon.serialssolutions.com%2F%23%21%2Fsearch%3Fho%3Df%26include.ft.matches%3Dt%26l%3Dnull%26q%3D
hasFullText 1
inHoldings 1
isFullTextHit
isPrint
journalDatabaseRights – providerCode: PRVPQU
  databaseName: Earth, Atmospheric & Aquatic Science Database
  customDbUrl:
  eissn: 1525-7541
  dateEnd: 20231207
  omitProxy: false
  ssIdentifier: ssj0004918
  issn: 1525-755X
  databaseCode: PCBAR
  dateStart: 20150201
  isFulltext: true
  titleUrlDefault: https://search.proquest.com/eaasdb
  providerName: ProQuest
– providerCode: PRVPQU
  databaseName: ProQuest Central
  customDbUrl:
  eissn: 1525-7541
  dateEnd: 20231207
  omitProxy: false
  ssIdentifier: ssj0004918
  issn: 1525-755X
  databaseCode: BENPR
  dateStart: 20150201
  isFulltext: true
  titleUrlDefault: https://www.proquest.com/central
  providerName: ProQuest
link http://cvtisr.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwtV1bb9MwFLbKhgQvCAYTHRf5ASGkKiWx49p-HFthQls1oYL6gBSlia1VlHRKs2r7Kfxbjh0ncZkmwQMvUeumbuTv6znHx-eC0BsaprEajUgQCaWCOCUiSIXIA8IFC3MRZtncIn3KJxMxm8nzXu9XkwuzWfKiENfX8vK_Qg1jALZJnf0HuNtJYQBeA-hwBdjh-lfAn6Y_VOCKEpvTm_XARGkOzPDg28L46Os8LBNssSh9fGqn7Jlar9aAnOlnV2xqebhV2Py2KXtxY6seVGpVbnnpgWYgXF1OlykNDb8xHrYyfrmqXFsQZ8Z34rCsnGf2ME9_DqZD3zlBvCAqLx_Anjo1j2Cp5yJSfblruuoyNqvVkj9W18VqhDUhHil9yWv6d3haPKJ1t57bGoKbYhqfT86CY6BNACZKPIw6ZdiGKBIOxlXM2T20SziTIDB3P4wn51-6pFtpncftk7u6UTD_-z9m3zJ5_KhXa8NMH6NHDjF8WJPmCeqpYg89-KRc2fI91O9W8Aa_xUfLBWxo7Lun6LtHLGyJhQ2xsBnGDbEwEAtbYmGPWNgQC7fEwh2xsCPWM_T143h6dBK43hxBRsO4CjKWm7085SzNKNEZbJsVFzLNIhVqCv_ydB5RxYSmUs8jLaQ58CejnNJsrnOV0320U6wK9RxhySiXSpJQS9jdM5GOmNZg5wswbkEp6D4aNsuXZK5wvemfskzsBpazBNY7OU5ImJj1TqI-etd-4bKu2XL3rfsWj_a-BvaDuz54gR52RH-JdqrySr1C97NNtViXrx1JfgO6uZHt
linkProvider ProQuest
openUrl ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fsummon.serialssolutions.com&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Lake-Effect+Rains+over+Lake+Victoria+and+Their+Association+with+Mesoscale+Convective+Systems&rft.jtitle=Journal+of+hydrometeorology&rft.au=Nicholson%2C+Sharon+E.&rft.au=Klotter%2C+Douglas&rft.au=Hartman%2C+Adam+T.&rft.date=2021-06-01&rft.pub=American+Meteorological+Society&rft.issn=1525-755X&rft.eissn=1525-7541&rft.volume=22&rft.issue=6&rft.spage=1353&rft.epage=1368&rft_id=info:doi/10.1175%2FJHM-D-20-0244.1&rft.externalDocID=27074475
thumbnail_l http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/lc.gif&issn=1525-755X&client=summon
thumbnail_m http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/mc.gif&issn=1525-755X&client=summon
thumbnail_s http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/sc.gif&issn=1525-755X&client=summon