The Impacts of Convectively Coupled Equatorial Waves on Extreme Rainfall in Northern Australia.
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| Title: | The Impacts of Convectively Coupled Equatorial Waves on Extreme Rainfall in Northern Australia. |
|---|---|
| Authors: | Muhammad, Fadhlil R.1,2 (AUTHOR) fadhlilrizki@student.unimelb.edu.au, Vincent, Claire1,2,3 (AUTHOR), King, Andrew1,3 (AUTHOR), Lubis, Sandro W.4 (AUTHOR) |
| Source: | Journal of Climate. Nov2024, Vol. 37 Issue 22, p5973-5993. 21p. |
| Subjects: | Rainfall probabilities, Rogue waves, Precipitation variability, Atmospheric waves, Climatology |
| Geographic Terms: | Australia |
| Abstract: | Convectively coupled equatorial waves (CCEWs) with an off-equatorial convective center, such as equatorial Rossby (ER) waves, mixed Rossby–gravity (MRG) waves, and tropical depression (TD)-type waves, can be the potential sources of predictability for subseasonal to seasonal prediction over northern Australia. To establish the statistical relationship of the wave–rainfall interaction, we investigate the influences of CCEWs on rainfall means and extremes during the austral summer (December–February) and autumn (March–May) from 1981 to 2018. The results show that ER waves increase the average daily rainfall by up to 7 mm day−1 (4 mm day−1) during the austral summer (autumn) and increase the probability of extreme rainfall (above the 90th percentile) by around 1.5–2.4 times (summer) and 1.1–1.8 times (autumn) relative to climatology. MRG and TD-type waves are shown to have a smaller impact, increasing rainfall by around 1–4 mm day−1 (1–1.5 and 1–3 mm day−1) during the summer (autumn) and extreme probability by 1.4–1.6 times and 1.25–1.9 times (1.3–1.8 times and 1.27–1.7 times), respectively. The increase in rainfall can be attributed to the enhancement of moisture convergence during the time of the rainfall. Furthermore, moisture gain and enhancement of moisture advection were found ahead of the convective center. Additionally, we find that interactions between multiple waves can act to amplify or suppress the mean daily and probability of extreme rainfall. This research highlights the important role of CCEWs on northern Australian precipitation variability. Significance Statement: This research is the first to delve into the significant role of convectively coupled equatorial waves (CCEWs) on subseasonal rainfall variability over northern Australia, particularly equatorial Rossby (ER) waves, mixed Rossby–gravity (MRG) waves, and tropical-depression-type (TD-type) waves. A robust statistical relationship is found between these waves and rainfall, suggesting these waves are major contributors to increased daily rainfall and extreme rainfall probabilities during austral summer and autumn. These findings emphasize the significance of CCEWs on northern Australian rainfall variability and highlight the potential of CCEWs for subseasonal to seasonal forecasts in Australia. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Climate is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 182484640 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: The Impacts of Convectively Coupled Equatorial Waves on Extreme Rainfall in Northern Australia. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Muhammad%2C+Fadhlil+R%2E%22">Muhammad, Fadhlil R.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> fadhlilrizki@student.unimelb.edu.au</i><br /><searchLink fieldCode="AR" term="%22Vincent%2C+Claire%22">Vincent, Claire</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22King%2C+Andrew%22">King, Andrew</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lubis%2C+Sandro+W%2E%22">Lubis, Sandro W.</searchLink><relatesTo>4</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Climate%22">Journal of Climate</searchLink>. Nov2024, Vol. 37 Issue 22, p5973-5993. 21p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Rainfall+probabilities%22">Rainfall probabilities</searchLink><br /><searchLink fieldCode="DE" term="%22Rogue+waves%22">Rogue waves</searchLink><br /><searchLink fieldCode="DE" term="%22Precipitation+variability%22">Precipitation variability</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+waves%22">Atmospheric waves</searchLink><br /><searchLink fieldCode="DE" term="%22Climatology%22">Climatology</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Australia%22">Australia</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Convectively coupled equatorial waves (CCEWs) with an off-equatorial convective center, such as equatorial Rossby (ER) waves, mixed Rossby–gravity (MRG) waves, and tropical depression (TD)-type waves, can be the potential sources of predictability for subseasonal to seasonal prediction over northern Australia. To establish the statistical relationship of the wave–rainfall interaction, we investigate the influences of CCEWs on rainfall means and extremes during the austral summer (December–February) and autumn (March–May) from 1981 to 2018. The results show that ER waves increase the average daily rainfall by up to 7 mm day−1 (4 mm day−1) during the austral summer (autumn) and increase the probability of extreme rainfall (above the 90th percentile) by around 1.5–2.4 times (summer) and 1.1–1.8 times (autumn) relative to climatology. MRG and TD-type waves are shown to have a smaller impact, increasing rainfall by around 1–4 mm day−1 (1–1.5 and 1–3 mm day−1) during the summer (autumn) and extreme probability by 1.4–1.6 times and 1.25–1.9 times (1.3–1.8 times and 1.27–1.7 times), respectively. The increase in rainfall can be attributed to the enhancement of moisture convergence during the time of the rainfall. Furthermore, moisture gain and enhancement of moisture advection were found ahead of the convective center. Additionally, we find that interactions between multiple waves can act to amplify or suppress the mean daily and probability of extreme rainfall. This research highlights the important role of CCEWs on northern Australian precipitation variability. Significance Statement: This research is the first to delve into the significant role of convectively coupled equatorial waves (CCEWs) on subseasonal rainfall variability over northern Australia, particularly equatorial Rossby (ER) waves, mixed Rossby–gravity (MRG) waves, and tropical-depression-type (TD-type) waves. A robust statistical relationship is found between these waves and rainfall, suggesting these waves are major contributors to increased daily rainfall and extreme rainfall probabilities during austral summer and autumn. These findings emphasize the significance of CCEWs on northern Australian rainfall variability and highlight the potential of CCEWs for subseasonal to seasonal forecasts in Australia. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Climate is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1175/JCLI-D-24-0042.1 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 21 StartPage: 5973 Subjects: – SubjectFull: Rainfall probabilities Type: general – SubjectFull: Rogue waves Type: general – SubjectFull: Precipitation variability Type: general – SubjectFull: Atmospheric waves Type: general – SubjectFull: Climatology Type: general – SubjectFull: Australia Type: general Titles: – TitleFull: The Impacts of Convectively Coupled Equatorial Waves on Extreme Rainfall in Northern Australia. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Muhammad, Fadhlil R. – PersonEntity: Name: NameFull: Vincent, Claire – PersonEntity: Name: NameFull: King, Andrew – PersonEntity: Name: NameFull: Lubis, Sandro W. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 11 Text: Nov2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 08948755 Numbering: – Type: volume Value: 37 – Type: issue Value: 22 Titles: – TitleFull: Journal of Climate Type: main |
| ResultId | 1 |
