Decadal variability in the austral summer precipitation over the Central Andes: Observations and the empirical-statistical downscaling model
The decadal variability in summer precipitation over the Central Andes (10°–30°S) is investigated from 1921 to 2010 using low-pass filtered time series of the central and eastern El Niño–Southern Oscillation (ENSO) Pacific (C and E) indices, the South Pacific Convergence Zone (SPCZ) index, the Atlan...
Published in: | International Journal of Climatology |
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Language: | English |
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Royal Meteorological Society
2022
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Online Access: | https://hdl.handle.net/20.500.12816/5312 https://doi.org/10.1002/joc.7867 |
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ftinstgpperu:oai:repositorio.igp.gob.pe:20.500.12816/5312 2023-07-30T04:05:35+02:00 Decadal variability in the austral summer precipitation over the Central Andes: Observations and the empirical-statistical downscaling model Sulca Jota, Juan Carlos Takahashi, Ken Tacza, José Espinoza, Jhan-Carlo Dong, Bo 2022-09-16 application/pdf https://hdl.handle.net/20.500.12816/5312 https://doi.org/10.1002/joc.7867 eng eng Royal Meteorological Society urn:issn:1097-0088 Sulca, J., Takahashi, K., Tacza, J., Espinoza, J-C., Dong, B. (2022). Decadal variability in the austral summer precipitation over the Central Andes: Observations and the empirical-statistical downscaling model.==$International Journal of Climatology.$==https://doi.org/10.1002/joc.7867 index-oti2018 http://hdl.handle.net/20.500.12816/5312 International Journal of Climatology https://doi.org/10.1002/joc.7867 info:eu-repo/semantics/closedAccess Atlantic Ocean Central and eastern ENSO Central Andes Decadal variability Empirical-statistical downscaling model SACZ https://purl.org/pe-repo/ocde/ford#1.05.09 info:eu-repo/semantics/article 2022 ftinstgpperu https://doi.org/20.500.12816/531210.1002/joc.7867 2023-07-17T16:51:24Z The decadal variability in summer precipitation over the Central Andes (10°–30°S) is investigated from 1921 to 2010 using low-pass filtered time series of the central and eastern El Niño–Southern Oscillation (ENSO) Pacific (C and E) indices, the South Pacific Convergence Zone (SPCZ) index, the Atlantic SST indices, Atlantic Multidecadal Oscillation (AMO) index, North Atlantic Oscillation (NAO) index, and ERA-20C reanalysis. Additionally, an empirical-statistical downscaling (ESD) model was built. A rotated empirical orthogonal function (REOF) analysis shows that the first leading mode of precipitation (RPC1) represents 38.2% of the total decadal variance. RPC2, RCP3, and RPC4 represent 18.8, 12.8, and 9.7% of the total decadal variance, respectively. Furthermore, RPC1 features highest loadings over most of the region. RPC2 features a dipole of highest loadings over the southernmost Bolivian Altiplano and lowest loadings over the northwestern Argentinian Andes. Conversely, RPC3 presents highest loadings over the eastern-central Bolivian Altiplano and northwestern Argentinian Andes. RPC4 features highest loadings over the southern Bolivian Andes. RPC1 and RPC3 wet summers are associated with moisture transport from the Amazon basin, but RPC1 features the strengthening upper-level Bolivian high-Nordeste low system over South America. Conversely, RPC2 and RPC4 wet summers are associated with local processes induced by southward displacement of the South Atlantic Convergence Zone and warm sea surface temperature (SST) anomalies over the Indian Ocean, respectively. According to the ESD model, the decadal variability in the central and eastern Pacific (CP and EP) and Atlantic Ocean reproduces the decadal component of the DJF precipitation over most of the Central Andes. Por pares Article in Journal/Newspaper North Atlantic North Atlantic oscillation Repositorio Geofísico Naciona del Perú Austral Indian Nordeste ENVELOPE(-66.867,-66.867,-68.167,-68.167) Pacific International Journal of Climatology 42 16 9836 9864 |
institution |
Open Polar |
collection |
Repositorio Geofísico Naciona del Perú |
op_collection_id |
ftinstgpperu |
language |
English |
topic |
Atlantic Ocean Central and eastern ENSO Central Andes Decadal variability Empirical-statistical downscaling model SACZ https://purl.org/pe-repo/ocde/ford#1.05.09 |
spellingShingle |
Atlantic Ocean Central and eastern ENSO Central Andes Decadal variability Empirical-statistical downscaling model SACZ https://purl.org/pe-repo/ocde/ford#1.05.09 Sulca Jota, Juan Carlos Takahashi, Ken Tacza, José Espinoza, Jhan-Carlo Dong, Bo Decadal variability in the austral summer precipitation over the Central Andes: Observations and the empirical-statistical downscaling model |
topic_facet |
Atlantic Ocean Central and eastern ENSO Central Andes Decadal variability Empirical-statistical downscaling model SACZ https://purl.org/pe-repo/ocde/ford#1.05.09 |
description |
The decadal variability in summer precipitation over the Central Andes (10°–30°S) is investigated from 1921 to 2010 using low-pass filtered time series of the central and eastern El Niño–Southern Oscillation (ENSO) Pacific (C and E) indices, the South Pacific Convergence Zone (SPCZ) index, the Atlantic SST indices, Atlantic Multidecadal Oscillation (AMO) index, North Atlantic Oscillation (NAO) index, and ERA-20C reanalysis. Additionally, an empirical-statistical downscaling (ESD) model was built. A rotated empirical orthogonal function (REOF) analysis shows that the first leading mode of precipitation (RPC1) represents 38.2% of the total decadal variance. RPC2, RCP3, and RPC4 represent 18.8, 12.8, and 9.7% of the total decadal variance, respectively. Furthermore, RPC1 features highest loadings over most of the region. RPC2 features a dipole of highest loadings over the southernmost Bolivian Altiplano and lowest loadings over the northwestern Argentinian Andes. Conversely, RPC3 presents highest loadings over the eastern-central Bolivian Altiplano and northwestern Argentinian Andes. RPC4 features highest loadings over the southern Bolivian Andes. RPC1 and RPC3 wet summers are associated with moisture transport from the Amazon basin, but RPC1 features the strengthening upper-level Bolivian high-Nordeste low system over South America. Conversely, RPC2 and RPC4 wet summers are associated with local processes induced by southward displacement of the South Atlantic Convergence Zone and warm sea surface temperature (SST) anomalies over the Indian Ocean, respectively. According to the ESD model, the decadal variability in the central and eastern Pacific (CP and EP) and Atlantic Ocean reproduces the decadal component of the DJF precipitation over most of the Central Andes. Por pares |
format |
Article in Journal/Newspaper |
author |
Sulca Jota, Juan Carlos Takahashi, Ken Tacza, José Espinoza, Jhan-Carlo Dong, Bo |
author_facet |
Sulca Jota, Juan Carlos Takahashi, Ken Tacza, José Espinoza, Jhan-Carlo Dong, Bo |
author_sort |
Sulca Jota, Juan Carlos |
title |
Decadal variability in the austral summer precipitation over the Central Andes: Observations and the empirical-statistical downscaling model |
title_short |
Decadal variability in the austral summer precipitation over the Central Andes: Observations and the empirical-statistical downscaling model |
title_full |
Decadal variability in the austral summer precipitation over the Central Andes: Observations and the empirical-statistical downscaling model |
title_fullStr |
Decadal variability in the austral summer precipitation over the Central Andes: Observations and the empirical-statistical downscaling model |
title_full_unstemmed |
Decadal variability in the austral summer precipitation over the Central Andes: Observations and the empirical-statistical downscaling model |
title_sort |
decadal variability in the austral summer precipitation over the central andes: observations and the empirical-statistical downscaling model |
publisher |
Royal Meteorological Society |
publishDate |
2022 |
url |
https://hdl.handle.net/20.500.12816/5312 https://doi.org/10.1002/joc.7867 |
long_lat |
ENVELOPE(-66.867,-66.867,-68.167,-68.167) |
geographic |
Austral Indian Nordeste Pacific |
geographic_facet |
Austral Indian Nordeste Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
urn:issn:1097-0088 Sulca, J., Takahashi, K., Tacza, J., Espinoza, J-C., Dong, B. (2022). Decadal variability in the austral summer precipitation over the Central Andes: Observations and the empirical-statistical downscaling model.==$International Journal of Climatology.$==https://doi.org/10.1002/joc.7867 index-oti2018 http://hdl.handle.net/20.500.12816/5312 International Journal of Climatology https://doi.org/10.1002/joc.7867 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/20.500.12816/531210.1002/joc.7867 |
container_title |
International Journal of Climatology |
container_volume |
42 |
container_issue |
16 |
container_start_page |
9836 |
op_container_end_page |
9864 |
_version_ |
1772817601086357504 |