Role of the eastern boundary-generated waves on the termination of 1997 Indian Ocean Dipole event

Abstract The termination of Indian Ocean Dipole (IOD) events is examined in terms of equatorial wave dynamics. In situ and satellite observations combined with an output from a linear wave model are used in this study. Our emphasis is on the 1997 IOD event but our results apply to other positive IOD...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Iskhaq Iskandar, Motoki Nagura, Michael J. McPhaden
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Indian Ocean Dipole Kelvin waves Reflected Rossby waves Zonal heat advection Science Q Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/b05d5d545e0b49319f2554dc3323515e
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:b05d5d545e0b49319f2554dc3323515e
record_format	dspace
spelling	oai:doaj.org-article:b05d5d545e0b49319f2554dc3323515e2021-11-28T12:05:16ZRole of the eastern boundary-generated waves on the termination of 1997 Indian Ocean Dipole event10.1186/s40562-021-00205-82196-4092https://doaj.org/article/b05d5d545e0b49319f2554dc3323515e2021-11-01T00:00:00Zhttps://doi.org/10.1186/s40562-021-00205-8https://doaj.org/toc/2196-4092Abstract The termination of Indian Ocean Dipole (IOD) events is examined in terms of equatorial wave dynamics. In situ and satellite observations combined with an output from a linear wave model are used in this study. Our emphasis is on the 1997 IOD event but our results apply to other positive IOD events as well. We find that the termination of anomalously cold sea surface temperature (SST) in the eastern pole of the dipole is associated with a warming tendency caused by the net surface heat fluxes. However, net surface heat fluxes alone cannot explain the total change in the SST. We show that during the peak phase of an IOD event, the weakening of zonal heat advection caused by eastern boundary-generated Rossby waves combined with the reduction of vertical entrainment and diffusion creates favorable conditions for surface heat fluxes to warm the SST in the eastern basin.Iskhaq IskandarMotoki NaguraMichael J. McPhadenSpringerOpenarticleIndian Ocean DipoleKelvin wavesReflected Rossby wavesZonal heat advectionScienceQGeologyQE1-996.5ENGeoscience Letters, Vol 8, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Indian Ocean Dipole Kelvin waves Reflected Rossby waves Zonal heat advection Science Q Geology QE1-996.5
spellingShingle	Indian Ocean Dipole Kelvin waves Reflected Rossby waves Zonal heat advection Science Q Geology QE1-996.5 Iskhaq Iskandar Motoki Nagura Michael J. McPhaden Role of the eastern boundary-generated waves on the termination of 1997 Indian Ocean Dipole event
description	Abstract The termination of Indian Ocean Dipole (IOD) events is examined in terms of equatorial wave dynamics. In situ and satellite observations combined with an output from a linear wave model are used in this study. Our emphasis is on the 1997 IOD event but our results apply to other positive IOD events as well. We find that the termination of anomalously cold sea surface temperature (SST) in the eastern pole of the dipole is associated with a warming tendency caused by the net surface heat fluxes. However, net surface heat fluxes alone cannot explain the total change in the SST. We show that during the peak phase of an IOD event, the weakening of zonal heat advection caused by eastern boundary-generated Rossby waves combined with the reduction of vertical entrainment and diffusion creates favorable conditions for surface heat fluxes to warm the SST in the eastern basin.
format	article
author	Iskhaq Iskandar Motoki Nagura Michael J. McPhaden
author_facet	Iskhaq Iskandar Motoki Nagura Michael J. McPhaden
author_sort	Iskhaq Iskandar
title	Role of the eastern boundary-generated waves on the termination of 1997 Indian Ocean Dipole event
title_short	Role of the eastern boundary-generated waves on the termination of 1997 Indian Ocean Dipole event
title_full	Role of the eastern boundary-generated waves on the termination of 1997 Indian Ocean Dipole event
title_fullStr	Role of the eastern boundary-generated waves on the termination of 1997 Indian Ocean Dipole event
title_full_unstemmed	Role of the eastern boundary-generated waves on the termination of 1997 Indian Ocean Dipole event
title_sort	role of the eastern boundary-generated waves on the termination of 1997 indian ocean dipole event
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/b05d5d545e0b49319f2554dc3323515e
work_keys_str_mv	AT iskhaqiskandar roleoftheeasternboundarygeneratedwavesontheterminationof1997indianoceandipoleevent AT motokinagura roleoftheeasternboundarygeneratedwavesontheterminationof1997indianoceandipoleevent AT michaeljmcphaden roleoftheeasternboundarygeneratedwavesontheterminationof1997indianoceandipoleevent
_version_	1718408219589607424

Role of the eastern boundary-generated waves on the termination of 1997 Indian Ocean Dipole event

Ejemplares similares