DataSheet1_Decadal modulation of ENSO and IOD impacts on the Indian Ocean upwelling.docx
The decadal modulations are observed in impacts of El Niño and Southern Ocean (ENSO) and Indian Ocean Dipole (IOD) on the tropical Indian Ocean upwelling. Here, we explore important contributors to the decadal modulations by combining the observational data since 1958 and statistical model simulatio...
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ftfrontimediafig:oai:figshare.com:article/24063321 2024-09-15T18:37:21+00:00 DataSheet1_Decadal modulation of ENSO and IOD impacts on the Indian Ocean upwelling.docx Xiaolin Zhang Takashi Mochizuki 2023-08-31T04:29:43Z https://doi.org/10.3389/feart.2023.1212421.s001 https://figshare.com/articles/dataset/DataSheet1_Decadal_modulation_of_ENSO_and_IOD_impacts_on_the_Indian_Ocean_upwelling_docx/24063321 unknown doi:10.3389/feart.2023.1212421.s001 https://figshare.com/articles/dataset/DataSheet1_Decadal_modulation_of_ENSO_and_IOD_impacts_on_the_Indian_Ocean_upwelling_docx/24063321 CC BY 4.0 Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Indian Ocean upwelling decadal modulation ENSO IOD PDO Dataset 2023 ftfrontimediafig https://doi.org/10.3389/feart.2023.1212421.s001 2024-08-19T06:20:04Z The decadal modulations are observed in impacts of El Niño and Southern Ocean (ENSO) and Indian Ocean Dipole (IOD) on the tropical Indian Ocean upwelling. Here, we explore important contributors to the decadal modulations by combining the observational data since 1958 and statistical model simulations. A Bayesian Dynamic Linear Model (BDLM), which represents the temporal modulations of the IOD and ENSO impacts, reproduces the timeseries of the eastern and western Indian Ocean (EIO and WIO) upwellings more realistically than a conventional Static Linear regression Model does. The time-varying regression coefficients in BDLM indicate that the observed shift of the IOD impact on the EIO upwelling around 1980 is mainly due to the changes of alongshore wind stress forcing and the sensitivity of the upper ocean temperature in the EIO through the surface warming tendency and the enhanced ocean stratification. In contrast, the impacts of ENSO and IOD on the WIO are modulated in relation to the decadal variability of the tropical Pacific Ocean. When the eastern tropical Pacific Ocean is observed warmer on decadal timescales, the accompanying changes of the dominant ENSO flavors contribute to modulating the strengths of the atmospheric convective activity over the Indian-Pacific warm pool and the easterly wind variations in the equatorial Indian Ocean. Dataset Southern Ocean Frontiers: Figshare |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Indian Ocean upwelling decadal modulation ENSO IOD PDO |
spellingShingle |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Indian Ocean upwelling decadal modulation ENSO IOD PDO Xiaolin Zhang Takashi Mochizuki DataSheet1_Decadal modulation of ENSO and IOD impacts on the Indian Ocean upwelling.docx |
topic_facet |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Indian Ocean upwelling decadal modulation ENSO IOD PDO |
description |
The decadal modulations are observed in impacts of El Niño and Southern Ocean (ENSO) and Indian Ocean Dipole (IOD) on the tropical Indian Ocean upwelling. Here, we explore important contributors to the decadal modulations by combining the observational data since 1958 and statistical model simulations. A Bayesian Dynamic Linear Model (BDLM), which represents the temporal modulations of the IOD and ENSO impacts, reproduces the timeseries of the eastern and western Indian Ocean (EIO and WIO) upwellings more realistically than a conventional Static Linear regression Model does. The time-varying regression coefficients in BDLM indicate that the observed shift of the IOD impact on the EIO upwelling around 1980 is mainly due to the changes of alongshore wind stress forcing and the sensitivity of the upper ocean temperature in the EIO through the surface warming tendency and the enhanced ocean stratification. In contrast, the impacts of ENSO and IOD on the WIO are modulated in relation to the decadal variability of the tropical Pacific Ocean. When the eastern tropical Pacific Ocean is observed warmer on decadal timescales, the accompanying changes of the dominant ENSO flavors contribute to modulating the strengths of the atmospheric convective activity over the Indian-Pacific warm pool and the easterly wind variations in the equatorial Indian Ocean. |
format |
Dataset |
author |
Xiaolin Zhang Takashi Mochizuki |
author_facet |
Xiaolin Zhang Takashi Mochizuki |
author_sort |
Xiaolin Zhang |
title |
DataSheet1_Decadal modulation of ENSO and IOD impacts on the Indian Ocean upwelling.docx |
title_short |
DataSheet1_Decadal modulation of ENSO and IOD impacts on the Indian Ocean upwelling.docx |
title_full |
DataSheet1_Decadal modulation of ENSO and IOD impacts on the Indian Ocean upwelling.docx |
title_fullStr |
DataSheet1_Decadal modulation of ENSO and IOD impacts on the Indian Ocean upwelling.docx |
title_full_unstemmed |
DataSheet1_Decadal modulation of ENSO and IOD impacts on the Indian Ocean upwelling.docx |
title_sort |
datasheet1_decadal modulation of enso and iod impacts on the indian ocean upwelling.docx |
publishDate |
2023 |
url |
https://doi.org/10.3389/feart.2023.1212421.s001 https://figshare.com/articles/dataset/DataSheet1_Decadal_modulation_of_ENSO_and_IOD_impacts_on_the_Indian_Ocean_upwelling_docx/24063321 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
doi:10.3389/feart.2023.1212421.s001 https://figshare.com/articles/dataset/DataSheet1_Decadal_modulation_of_ENSO_and_IOD_impacts_on_the_Indian_Ocean_upwelling_docx/24063321 |
op_rights |
CC BY 4.0 |
op_doi |
https://doi.org/10.3389/feart.2023.1212421.s001 |
_version_ |
1810481719583703040 |