Evaluation of the homogenization adjustments applied to European temperature records in the Global Historical Climatology Network dataset

2022
journal article
article
cris.lastimport.wos2024-04-10T00:27:21Z
dc.abstract.enThe widely used Global Historical Climatology Network (GHCN) monthly temperature dataset is available in two formats—non-homogenized and homogenized. Since 2011, this homogenized dataset has been updated almost daily by applying the “Pairwise Homogenization Algorithm” (PHA) to the non-homogenized datasets. Previous studies found that the PHA can perform well at correcting synthetic time series when certain artificial biases are introduced. However, its performance with real world data has been less well studied. Therefore, the homogenized GHCN datasets (Version 3 and 4) were downloaded almost daily over a 10-year period (2011–2021) yielding 3689 different updates to the datasets. The different breakpoints identified were analyzed for a set of stations from 24 European countries for which station history metadata were available. A remarkable inconsistency in the identified breakpoints (and hence adjustments applied) was revealed. Of the adjustments applied for GHCN Version 4, 64% (61% for Version 3) were identified on less than 25% of runs, while only 16% of the adjustments (21% for Version 3) were identified consistently for more than 75% of the runs. The consistency of PHA adjustments improved when the breakpoints corresponded to documented station history metadata events. However, only 19% of the breakpoints (18% for Version 3) were associated with a documented event within 1 year, and 67% (69% for Version 3) were not associated with any documented event. Therefore, while the PHA remains a useful tool in the community’s homogenization toolbox, many of the PHA adjustments applied to the homogenized GHCN dataset may have been spurious. Using station metadata to assess the reliability of PHA adjustments might potentially help to identify some of these spurious adjustments.pl
dc.affiliationWydział Geografii i Geologii : Instytut Geografii i Gospodarki Przestrzennejpl
dc.contributor.authorO'Neill, Peterpl
dc.contributor.authorConnolly, Ronanpl
dc.contributor.authorConnolly, Michaelpl
dc.contributor.authorSoon, Williepl
dc.contributor.authorChimani, Barbarapl
dc.contributor.authorCrok, Marcelpl
dc.contributor.authorde Vos, Robpl
dc.contributor.authorHarde, Hermannpl
dc.contributor.authorKajaba, Peterpl
dc.contributor.authorNojarov, Peterpl
dc.contributor.authorPrzybylak, Rajmundpl
dc.contributor.authorRasol, Dubravkapl
dc.contributor.authorSkrynyk, Olegpl
dc.contributor.authorSkrynyk, Olesyapl
dc.contributor.authorŠtěpánek, Petrpl
dc.contributor.authorWypych, Agnieszka - 132804 pl
dc.contributor.authorZahradníček, Pavelpl
dc.date.accession2022-04-13pl
dc.date.accessioned2022-04-13T13:00:28Z
dc.date.available2022-04-13T13:00:28Z
dc.date.issued2022pl
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.additionalBibliogr.pl
dc.description.number2pl
dc.description.versionostateczna wersja wydawcy
dc.description.volume13pl
dc.identifier.articleid285pl
dc.identifier.doi10.3390/atmos13020285pl
dc.identifier.eissn2073-4433pl
dc.identifier.urihttps://ruj.uj.edu.pl/xmlui/handle/item/290960
dc.identifier.weblinkhttps://www.mdpi.com/2073-4433/13/2/285pl
dc.languageengpl
dc.language.containerengpl
dc.pbn.affiliationDziedzina nauk ścisłych i przyrodniczych : nauki o Ziemi i środowiskupl
dc.rightsUdzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa*
dc.rights.licenceCC-BY
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/legalcode.pl*
dc.share.typeotwarte czasopismo
dc.subject.entemperature homogenizationpl
dc.subject.ennon-climatic biasespl
dc.subject.enstation metadatapl
dc.subject.enclimate changepl
dc.subject.enEuropean temperature changespl
dc.subtypeArticlepl
dc.titleEvaluation of the homogenization adjustments applied to European temperature records in the Global Historical Climatology Network datasetpl
dc.title.journalAtmospherepl
dc.typeJournalArticlepl
dspace.entity.typePublication
cris.lastimport.wos
2024-04-10T00:27:21Z
dc.abstract.enpl
The widely used Global Historical Climatology Network (GHCN) monthly temperature dataset is available in two formats—non-homogenized and homogenized. Since 2011, this homogenized dataset has been updated almost daily by applying the “Pairwise Homogenization Algorithm” (PHA) to the non-homogenized datasets. Previous studies found that the PHA can perform well at correcting synthetic time series when certain artificial biases are introduced. However, its performance with real world data has been less well studied. Therefore, the homogenized GHCN datasets (Version 3 and 4) were downloaded almost daily over a 10-year period (2011–2021) yielding 3689 different updates to the datasets. The different breakpoints identified were analyzed for a set of stations from 24 European countries for which station history metadata were available. A remarkable inconsistency in the identified breakpoints (and hence adjustments applied) was revealed. Of the adjustments applied for GHCN Version 4, 64% (61% for Version 3) were identified on less than 25% of runs, while only 16% of the adjustments (21% for Version 3) were identified consistently for more than 75% of the runs. The consistency of PHA adjustments improved when the breakpoints corresponded to documented station history metadata events. However, only 19% of the breakpoints (18% for Version 3) were associated with a documented event within 1 year, and 67% (69% for Version 3) were not associated with any documented event. Therefore, while the PHA remains a useful tool in the community’s homogenization toolbox, many of the PHA adjustments applied to the homogenized GHCN dataset may have been spurious. Using station metadata to assess the reliability of PHA adjustments might potentially help to identify some of these spurious adjustments.
dc.affiliationpl
Wydział Geografii i Geologii : Instytut Geografii i Gospodarki Przestrzennej
dc.contributor.authorpl
O'Neill, Peter
dc.contributor.authorpl
Connolly, Ronan
dc.contributor.authorpl
Connolly, Michael
dc.contributor.authorpl
Soon, Willie
dc.contributor.authorpl
Chimani, Barbara
dc.contributor.authorpl
Crok, Marcel
dc.contributor.authorpl
de Vos, Rob
dc.contributor.authorpl
Harde, Hermann
dc.contributor.authorpl
Kajaba, Peter
dc.contributor.authorpl
Nojarov, Peter
dc.contributor.authorpl
Przybylak, Rajmund
dc.contributor.authorpl
Rasol, Dubravka
dc.contributor.authorpl
Skrynyk, Oleg
dc.contributor.authorpl
Skrynyk, Olesya
dc.contributor.authorpl
Štěpánek, Petr
dc.contributor.authorpl
Wypych, Agnieszka - 132804
dc.contributor.authorpl
Zahradníček, Pavel
dc.date.accessionpl
2022-04-13
dc.date.accessioned
2022-04-13T13:00:28Z
dc.date.available
2022-04-13T13:00:28Z
dc.date.issuedpl
2022
dc.date.openaccess
0
dc.description.accesstime
w momencie opublikowania
dc.description.additionalpl
Bibliogr.
dc.description.numberpl
2
dc.description.version
ostateczna wersja wydawcy
dc.description.volumepl
13
dc.identifier.articleidpl
285
dc.identifier.doipl
10.3390/atmos13020285
dc.identifier.eissnpl
2073-4433
dc.identifier.uri
https://ruj.uj.edu.pl/xmlui/handle/item/290960
dc.identifier.weblinkpl
https://www.mdpi.com/2073-4433/13/2/285
dc.languagepl
eng
dc.language.containerpl
eng
dc.pbn.affiliationpl
Dziedzina nauk ścisłych i przyrodniczych : nauki o Ziemi i środowisku
dc.rights*
Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa
dc.rights.licence
CC-BY
dc.rights.uri*
http://creativecommons.org/licenses/by/4.0/legalcode.pl
dc.share.type
otwarte czasopismo
dc.subject.enpl
temperature homogenization
dc.subject.enpl
non-climatic biases
dc.subject.enpl
station metadata
dc.subject.enpl
climate change
dc.subject.enpl
European temperature changes
dc.subtypepl
Article
dc.titlepl
Evaluation of the homogenization adjustments applied to European temperature records in the Global Historical Climatology Network dataset
dc.title.journalpl
Atmosphere
dc.typepl
JournalArticle
dspace.entity.type
Publication
Affiliations

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