Abstract
Climate change may affect wind patterns. It will impact wind energy generation. Climate models will help to assess how wind speed is affected by climate change. Climate models have different boundary conditions, and the forcing variables lead to the uncertainty of data. The present study provides a comparison of six regional climate models (RCMs) with reanalysis data (ERA-Interim) and validated with measured data at Rameshwaram. Further quantile mapping technique has been used for the removal of bias from RCM models. Results show that all six RCMs have lesser correlation (~0.50), high bias (~1.4 m/s) with measured data before quantile mapping. However, after the quantile mapping with reanalysis data, the RCMs achieved a higher correlation (~0.63) and less bias (~0.45). Further, the trends of wind speeds for all RCMs have been analysed and checked the significance of trends with the t-test. Results show that wind speed trends are increasing with 0.03 m/s/decade at Rameshwaram.
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Abbreviations
- CCCR:
-
Centre for Climate Change Research.
- CORDEX:
-
Coordinated Regional Climate Downscaling Experiment
- ECMWF:
-
European Centre for Medium-Range Weather Forecasts
- ERA:
-
ECMWF Reanalysis
- GCM:
-
General circulation model
- ICTP:
-
India with the help of the Abdus Salam International Centre for Theoretical Physics
- IITM:
-
Indian Institute of Tropical Meteorology
- NIWE:
-
National Institute of Wind Energy
- RCM:
-
Regional climate model
- RCP:
-
Representative concentration pathways
- RCAO:
-
Rossby Centre coupled regional climate model
- QM:
-
Quantile mapping
- SD:
-
Standard deviation
- Fs:
-
The cumulative distribution function (CDF)
- Fo−1:
-
The inverse CDF function
- M:
-
Measured wind speeds
- S:
-
RCM model wind speeds
- Qm(t):
-
Simulated data from the RCM
- Qs(t):
-
Bias-corrected data
- Rg:
-
Regression function of wind speed time series
- t:
-
Year from 1979 to 2005
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Acknowledgements
“The World Climate Research Programme's Working Group on Regional Climate and the Working Group on Coupled Modelling, the former coordinating body of CORDEX and responsible panel for CMIP5 are gratefully acknowledged. The climate modelling groups, ICTP are sincerely thanked for producing and making available their model output. The authors thank the Earth System Grid Federation (ESGF) infrastructure and the Climate Data Portal hosted at the Centre for Climate Change Research (CCCR), Indian Institute of Tropical Meteorology (IITM) for providing CORDEX South Asia data”. We would like to thank the ECMWF for making available the ERA-Interim reanalysis product at https://www.ecmwf.int/datasets. We would also thank NIWE for making the measured wind speeds available at Rameshwaram.
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Abhinaya Srinivas, B., Nagababu, G., Jani, H., Singh Kachhwaha, S. (2021). Comparative Study and Trend Analysis of Regional Climate Models and Reanalysis Wind Speeds at Rameshwaram. In: Baredar, P.V., Tangellapalli, S., Solanki, C.S. (eds) Advances in Clean Energy Technologies . Springer Proceedings in Energy. Springer, Singapore. https://doi.org/10.1007/978-981-16-0235-1_61
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