Field observations and numerical simulation of upwelling in the wake of Rottnest Island, south-western Australia

Majid Jandaghi Alaee, Charitha Pattiaratchi, Gregory Ivey

Research output: Contribution to conferenceAbstract

Abstract

The redistribution of nutrients, pollution and sedi- ments, in the wake of islands or headlands has impor- tant applications in the areas of fisheries, pollutant dispersal and sediment transport. Recent studies have documented the two and three- dimensional structure of island wakes when there is flow separation leading to a recirculating eddy. However, the wake structure when flow separation does not occur (the attached flow condition) is relatively unknown. In this study we present results of extensive field observations to show an upwelling event in the summer wake of Rottnest Island, south west of Australia. During summer, the interaction between the northward wind-driven current and Rottnest Island does not lead to flow separation but a consistent cold water patch is observed to the north of the Island. The wake structure is also numerically sim- ulated using a three-dimensional baroclinic model. The results are shown to be in good agreement with the observations and reveal that upwelling may occur in the wake of an island even in the absence of a well- defined eddy. In addition, we show that curvature- induced secondary circulation at the tip of the island plays the dominant role in the generation of upwelling within the wake region.
Original languageEnglish
Pages37–37
Number of pages1
Publication statusPublished - 1998
EventTOS-IOC Jointly-Sponsored Meeting - UNESCO Headquarters, Paris, France
Duration: 1 Jun 19984 Jun 1998

Conference

ConferenceTOS-IOC Jointly-Sponsored Meeting
CountryFrance
CityParis
Period1/06/984/06/98

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upwelling
simulation
eddy
wind-driven current
flow structure
summer
cold water
curvature
sediment transport
fishery
pollution
pollutant
nutrient
sediment

Cite this

Jandaghi Alaee, M., Pattiaratchi, C., & Ivey, G. (1998). Field observations and numerical simulation of upwelling in the wake of Rottnest Island, south-western Australia. 37–37. Abstract from TOS-IOC Jointly-Sponsored Meeting, Paris, France.
@conference{de24aa9ed60940028502dcfdde7f1ab4,
title = "Field observations and numerical simulation of upwelling in the wake of Rottnest Island, south-western Australia",
abstract = "The redistribution of nutrients, pollution and sedi- ments, in the wake of islands or headlands has impor- tant applications in the areas of fisheries, pollutant dispersal and sediment transport. Recent studies have documented the two and three- dimensional structure of island wakes when there is flow separation leading to a recirculating eddy. However, the wake structure when flow separation does not occur (the attached flow condition) is relatively unknown. In this study we present results of extensive field observations to show an upwelling event in the summer wake of Rottnest Island, south west of Australia. During summer, the interaction between the northward wind-driven current and Rottnest Island does not lead to flow separation but a consistent cold water patch is observed to the north of the Island. The wake structure is also numerically sim- ulated using a three-dimensional baroclinic model. The results are shown to be in good agreement with the observations and reveal that upwelling may occur in the wake of an island even in the absence of a well- defined eddy. In addition, we show that curvature- induced secondary circulation at the tip of the island plays the dominant role in the generation of upwelling within the wake region.",
author = "{Jandaghi Alaee}, Majid and Charitha Pattiaratchi and Gregory Ivey",
year = "1998",
language = "English",
pages = "37–37",
note = "TOS-IOC Jointly-Sponsored Meeting ; Conference date: 01-06-1998 Through 04-06-1998",

}

Jandaghi Alaee, M, Pattiaratchi, C & Ivey, G 1998, 'Field observations and numerical simulation of upwelling in the wake of Rottnest Island, south-western Australia' TOS-IOC Jointly-Sponsored Meeting, Paris, France, 1/06/98 - 4/06/98, pp. 37–37.

Field observations and numerical simulation of upwelling in the wake of Rottnest Island, south-western Australia. / Jandaghi Alaee, Majid; Pattiaratchi, Charitha; Ivey, Gregory.

1998. 37–37 Abstract from TOS-IOC Jointly-Sponsored Meeting, Paris, France.

Research output: Contribution to conferenceAbstract

TY - CONF

T1 - Field observations and numerical simulation of upwelling in the wake of Rottnest Island, south-western Australia

AU - Jandaghi Alaee, Majid

AU - Pattiaratchi, Charitha

AU - Ivey, Gregory

PY - 1998

Y1 - 1998

N2 - The redistribution of nutrients, pollution and sedi- ments, in the wake of islands or headlands has impor- tant applications in the areas of fisheries, pollutant dispersal and sediment transport. Recent studies have documented the two and three- dimensional structure of island wakes when there is flow separation leading to a recirculating eddy. However, the wake structure when flow separation does not occur (the attached flow condition) is relatively unknown. In this study we present results of extensive field observations to show an upwelling event in the summer wake of Rottnest Island, south west of Australia. During summer, the interaction between the northward wind-driven current and Rottnest Island does not lead to flow separation but a consistent cold water patch is observed to the north of the Island. The wake structure is also numerically sim- ulated using a three-dimensional baroclinic model. The results are shown to be in good agreement with the observations and reveal that upwelling may occur in the wake of an island even in the absence of a well- defined eddy. In addition, we show that curvature- induced secondary circulation at the tip of the island plays the dominant role in the generation of upwelling within the wake region.

AB - The redistribution of nutrients, pollution and sedi- ments, in the wake of islands or headlands has impor- tant applications in the areas of fisheries, pollutant dispersal and sediment transport. Recent studies have documented the two and three- dimensional structure of island wakes when there is flow separation leading to a recirculating eddy. However, the wake structure when flow separation does not occur (the attached flow condition) is relatively unknown. In this study we present results of extensive field observations to show an upwelling event in the summer wake of Rottnest Island, south west of Australia. During summer, the interaction between the northward wind-driven current and Rottnest Island does not lead to flow separation but a consistent cold water patch is observed to the north of the Island. The wake structure is also numerically sim- ulated using a three-dimensional baroclinic model. The results are shown to be in good agreement with the observations and reveal that upwelling may occur in the wake of an island even in the absence of a well- defined eddy. In addition, we show that curvature- induced secondary circulation at the tip of the island plays the dominant role in the generation of upwelling within the wake region.

UR - https://tos.org/oceanography/article/abstracts-from-the-1998-tos-ioc-jointly-sponsored-meeting

M3 - Abstract

SP - 37

EP - 37

ER -