Impacts of global climate change on the future ocean wave power potential: a case study from the Indian Ocean

Harshinie Karunarathna; Pravin Maduwantha; Bahareh Kamranzad; Harsha Rathnasooriya; Kasun De Silva

doi:10.3390/en13113028

Impacts of global climate change on the future ocean wave power potential: a case study from the Indian Ocean

Harshinie Karunarathna^*, Pravin Maduwantha, Bahareh Kamranzad, Harsha Rathnasooriya, Kasun De Silva

^*Corresponding author for this work

Civil And Environmental Engineering

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Abstract

This study investigates the impacts of global climate change on the future wave power potential, taking Sri Lanka as a case study from the northern Indian Ocean. The geographical location of Sri Lanka, which receives long-distance swell waves generated in the Southern Indian Ocean, favors wave energy-harvesting. Waves projected by a numerical wave model developed using Simulating Waves Nearshore Waves (SWAN) wave model, which is forced by atmospheric forcings generated by an Atmospheric Global Climate Model (AGCM) within two time slices that represent "present"and "future"(end of century) wave climates, are used to evaluate and compare present and future wave power potential around Sri Lanka. The results reveal that there will be a 12-20% reduction in average available wave power along the south-west and south-east coasts of Sri Lanka in future. This reduction is due mainly to changes to the tropical south-west monsoon system because of global climate change. The available wave power resource attributed to swell wave component remains largely unchanged. Although a detailed analysis of monthly and annual average wave power under both "present"and "future"climates reveals a strong seasonal and some degree of inter-annual variability of wave power, a notable decadal-scale trend of variability is not visible during the simulated 25-year periods. Finally, the results reveal that the wave power attributed to swell waves are very stable over the long term.

Original language	English
Article number	en13113028
Number of pages	22
Journal	Energies
Volume	13
Issue number	11
DOIs	https://doi.org/10.3390/en13113028
Publication status	Published - 11 Jun 2020

Funding

Funding: Financial support was provided by Swansea University, UK through the Global Challenge Research Fund to the project titled “Wave energy resource characterization for Sri Lanka in a changing ocean climate”, to conduct the research presented in this paper. PM was partially supported by the Senate Research Committee Grant SRC/ST/2019/55 provided the University of Moratuwa, Sri Lanka. Acknowledgments: Nalin Wickramanayake of the Open University of Sri Lanka and Sujeewa Ranawaka of the Department of Coast Conservation and Coastal Resource Management of Sri Lanka provided measured wave data for model validation. Japan Meteorological Agency is acknowledged for sharing atmospheric model outputs to run the wave models. Bahareh Kamranzad is supported by the Hakubi Center for Advanced Research at Kyoto University and JSPS Grants-in-Aid for Scientific Research (KAKENHI), the Ministry of Education, Culture, Sports, Science, and Technology-Japan (MEXT).

Keywords

climate change
Indian Ocean
ocean wave power
Sri Lanka
wave projections
global climate change
future wave power potential
Simulating Waves Nearshore Waves (SWAN) wave model
numerical wave model
swell waves

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.3390/en13113028

Karunarathna-etal-E20220-Impacts-global-climate-change-future-ocean-wave-power-potential-case-study-indian-oceanFinal published version, 54.4 MBLicence: CC BY 4.0

Cite this

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title = "Impacts of global climate change on the future ocean wave power potential: a case study from the Indian Ocean",

abstract = "This study investigates the impacts of global climate change on the future wave power potential, taking Sri Lanka as a case study from the northern Indian Ocean. The geographical location of Sri Lanka, which receives long-distance swell waves generated in the Southern Indian Ocean, favors wave energy-harvesting. Waves projected by a numerical wave model developed using Simulating Waves Nearshore Waves (SWAN) wave model, which is forced by atmospheric forcings generated by an Atmospheric Global Climate Model (AGCM) within two time slices that represent {"}present{"}and {"}future{"}(end of century) wave climates, are used to evaluate and compare present and future wave power potential around Sri Lanka. The results reveal that there will be a 12-20\% reduction in average available wave power along the south-west and south-east coasts of Sri Lanka in future. This reduction is due mainly to changes to the tropical south-west monsoon system because of global climate change. The available wave power resource attributed to swell wave component remains largely unchanged. Although a detailed analysis of monthly and annual average wave power under both {"}present{"}and {"}future{"}climates reveals a strong seasonal and some degree of inter-annual variability of wave power, a notable decadal-scale trend of variability is not visible during the simulated 25-year periods. Finally, the results reveal that the wave power attributed to swell waves are very stable over the long term.",

keywords = "climate change, Indian Ocean, ocean wave power, Sri Lanka, wave projections, global climate change, future wave power potential, Simulating Waves Nearshore Waves (SWAN) wave model, numerical wave model, swell waves",

author = "Harshinie Karunarathna and Pravin Maduwantha and Bahareh Kamranzad and Harsha Rathnasooriya and \{De Silva\}, Kasun",

note = "Funding Information: Funding: Financial support was provided by Swansea University, UK through the Global Challenge Research Fund to the project titled “Wave energy resource characterization for Sri Lanka in a changing ocean climate”, to conduct the research presented in this paper. PM was partially supported by the Senate Research Committee Grant SRC/ST/2019/55 provided the University of Moratuwa, Sri Lanka. Funding Information: Acknowledgments: Nalin Wickramanayake of the Open University of Sri Lanka and Sujeewa Ranawaka of the Department of Coast Conservation and Coastal Resource Management of Sri Lanka provided measured wave data for model validation. Japan Meteorological Agency is acknowledged for sharing atmospheric model outputs to run the wave models. Bahareh Kamranzad is supported by the Hakubi Center for Advanced Research at Kyoto University and JSPS Grants-in-Aid for Scientific Research (KAKENHI), the Ministry of Education, Culture, Sports, Science, and Technology-Japan (MEXT). Publisher Copyright: {\textcopyright} 2020 by the authors. Karunarathna, H.; Maduwantha, P.; Kamranzad, B.; Rathnasooriya, H.; De Silva, K. Impacts of Global Climate Change on the Future Ocean Wave Power Potential: A Case Study from the Indian Ocean. Energies 2020, 13, 3028. https://doi.org/10.3390/en13113028 ",

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AU - Karunarathna, Harshinie

AU - Maduwantha, Pravin

AU - Kamranzad, Bahareh

AU - Rathnasooriya, Harsha

AU - De Silva, Kasun

N1 - Funding Information: Funding: Financial support was provided by Swansea University, UK through the Global Challenge Research Fund to the project titled “Wave energy resource characterization for Sri Lanka in a changing ocean climate”, to conduct the research presented in this paper. PM was partially supported by the Senate Research Committee Grant SRC/ST/2019/55 provided the University of Moratuwa, Sri Lanka. Funding Information: Acknowledgments: Nalin Wickramanayake of the Open University of Sri Lanka and Sujeewa Ranawaka of the Department of Coast Conservation and Coastal Resource Management of Sri Lanka provided measured wave data for model validation. Japan Meteorological Agency is acknowledged for sharing atmospheric model outputs to run the wave models. Bahareh Kamranzad is supported by the Hakubi Center for Advanced Research at Kyoto University and JSPS Grants-in-Aid for Scientific Research (KAKENHI), the Ministry of Education, Culture, Sports, Science, and Technology-Japan (MEXT). Publisher Copyright: © 2020 by the authors. Karunarathna, H.; Maduwantha, P.; Kamranzad, B.; Rathnasooriya, H.; De Silva, K. Impacts of Global Climate Change on the Future Ocean Wave Power Potential: A Case Study from the Indian Ocean. Energies 2020, 13, 3028. https://doi.org/10.3390/en13113028

PY - 2020/6/11

Y1 - 2020/6/11

N2 - This study investigates the impacts of global climate change on the future wave power potential, taking Sri Lanka as a case study from the northern Indian Ocean. The geographical location of Sri Lanka, which receives long-distance swell waves generated in the Southern Indian Ocean, favors wave energy-harvesting. Waves projected by a numerical wave model developed using Simulating Waves Nearshore Waves (SWAN) wave model, which is forced by atmospheric forcings generated by an Atmospheric Global Climate Model (AGCM) within two time slices that represent "present"and "future"(end of century) wave climates, are used to evaluate and compare present and future wave power potential around Sri Lanka. The results reveal that there will be a 12-20% reduction in average available wave power along the south-west and south-east coasts of Sri Lanka in future. This reduction is due mainly to changes to the tropical south-west monsoon system because of global climate change. The available wave power resource attributed to swell wave component remains largely unchanged. Although a detailed analysis of monthly and annual average wave power under both "present"and "future"climates reveals a strong seasonal and some degree of inter-annual variability of wave power, a notable decadal-scale trend of variability is not visible during the simulated 25-year periods. Finally, the results reveal that the wave power attributed to swell waves are very stable over the long term.

AB - This study investigates the impacts of global climate change on the future wave power potential, taking Sri Lanka as a case study from the northern Indian Ocean. The geographical location of Sri Lanka, which receives long-distance swell waves generated in the Southern Indian Ocean, favors wave energy-harvesting. Waves projected by a numerical wave model developed using Simulating Waves Nearshore Waves (SWAN) wave model, which is forced by atmospheric forcings generated by an Atmospheric Global Climate Model (AGCM) within two time slices that represent "present"and "future"(end of century) wave climates, are used to evaluate and compare present and future wave power potential around Sri Lanka. The results reveal that there will be a 12-20% reduction in average available wave power along the south-west and south-east coasts of Sri Lanka in future. This reduction is due mainly to changes to the tropical south-west monsoon system because of global climate change. The available wave power resource attributed to swell wave component remains largely unchanged. Although a detailed analysis of monthly and annual average wave power under both "present"and "future"climates reveals a strong seasonal and some degree of inter-annual variability of wave power, a notable decadal-scale trend of variability is not visible during the simulated 25-year periods. Finally, the results reveal that the wave power attributed to swell waves are very stable over the long term.

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KW - ocean wave power

KW - Sri Lanka

KW - wave projections

KW - global climate change

KW - future wave power potential

KW - Simulating Waves Nearshore Waves (SWAN) wave model

KW - numerical wave model

KW - swell waves

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ER -

Impacts of global climate change on the future ocean wave power potential: a case study from the Indian Ocean

Abstract

Funding

Keywords

UN SDGs

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Wave energy resource characterization for Sri Lanka in a changing ocean climate

Cite this

Impacts of global climate change on the future ocean wave power potential: a case study from the Indian Ocean

Abstract

Funding

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Projects

Wave energy resource characterization for Sri Lanka in a changing ocean climate

Cite this