Abstract
Mega-ensemble climate projection results are expected to be used for investigating future changes in design condition, such as wave height and storm surged. However, climate models are known to have some uncertainties making bias correction necessary. We performed wave modeling was performed based on typhoon tracks extracted from megaensemble projections. Three bias correction methods were investigated, and the variation induced by these methods was evaluated. The corrected future wave heights showed variations among various locations, and they were larger than the variations caused by the difference in bias correction methods for the return periods of 1/30 and 1/50. This result suggests that appropriately selecting a correction method is not a significant issue in coastal planning.References
Arimura, J., Z. Qiu, T. Okayasu, K. Chichibu, K. Watanabe, and N. Mori. 2021. Bias correction method
for d4PDF typhoon track dataset and future change in typhoon central pressure, Journal of JSCE
B2 (Coastal Eng.), 77(2), I_973–I_978. (in Japanese)
Booij, N., R. C. Ris and L. H. Holthuijsen. 1999. A third-generation wave model for coastal regions:
Model description and validation, J. Geophys. Res., 104(c4), 7649-7666.
Igarashi, Y., N. Noguchi, D. Nakazaono, K. Ushiki, K. Chichibu, K. Watanabe, and N. Mori. 2022a.
Climate change impact assessment method using d4PDF for storm surges and high waves, Journal
of JSCE B2 (Coastal Eng.), 78(2), I_967–I_972. (in Japanese)
Igarashi, Y., Y. Nishida, M. Jinbo, K. Ushiki, K. Chichibu, K. Watanabe, and N. Mori. 2022b. An
effective method for assessing the climate change impact on storm surged and high waves using
d4PDF, Journal of JSCE B2 (Coastal Eng.), 78(2), I_973–I_978. (in Japanese)
Kawai, H., K. Honda, T. Tomita, and T. Kakinuma. 2005. Characteristic of typhoons in 2004 and
forecasting and hindcasting of their storm surges, Technical Note of the Port and Airport Research
Institute, 1103, 34pp. (in Japanese)
Lai, T. K., and R. Toumi. 2023. Has there been a recent shallowing of tropical cyclones?, Geophysical
Research Letters, 50, e2022GL102184. https://doi.org/10.1029/2022GL102184
Mizuta, R., A. Murata, M. Ishii, H. Shiogama, K. Hibino, N. Mori, O. Arakawa, Y. Imada, T. Aoyagi,
H. Kawase, M. Mori, Y. Okada, T. Shimura, T. Nagatomo, M. Ikeda, H. Endo, M. Nosaka, M. Arai,
C. Takahashi, K. Tanaka, T. Takemi, Y. Tachikawa, K. Temur, Y. Kamae, M. Watanabe, H. Sasaki,
A. Kitoh, I. Takayabu, E. Nakakita, and M. Kimoto. 2017. Over 5000 years of ensemble future
climate simulations by 60 km global and 20 km regional atmospheric models, The Bulletin of the
American Meteorological Society (BAMS), July, 1383-1398.
Morim, J., M. Hemer, X. L. Wang, N. Cartwright, C. Trenham, A. Semedo, I. Young, L. Bricheno, P.
Camus, M. Casas-Prat, L. Erikson, L. Mentaschi, N. Mori, T. Shimura, B. Timmermans, O.
Aarnes, Ø. Breivik, A. Behrens, M. Dobrynin, M. Menendez, J. Staneva, M. Wehner, J. Wolf, B.
Kamranzad, A. Webb, J. Stopa and F. Andutta. 2019. Robustness and uncertainties in global
multivariate wind-wave climate projections. Nature Climate Change, 9, 711–718.
https://doi.org/10.1038/s41558-019-0542-5
Myers, V. A. 1954. Characteristics of United States hurricanes pertinent to levee design for Lake
Okeechobee, Florida, 30, US Government Printing Office.
Nosaka, M., M. Ishii, H. Shiogama, R. Mizuta, A. Murata, H. Kawase and H. Sasaki. 2020. Scalability
of future climate changes across Japan examined with large-ensemble simulations at + 1.5 K, +2 K,
and + 4 K global warming levels. Prog Earth Planet Sci, 7, 27. https://doi.org/10.1186/s40645-
-00341-3
Shimura, T., N. Mori, and M. A. Hemer. 2017. Projection of tropical cyclone-generated extreme wave
climate based on CMIP5 multi-model ensemble in the WesternNorth Pacific, Climate Dynamics,
, 1449-1462.
Wang, L., and W. Chen. 2014. Equiratio cumulative distribution function matching as an improvement
to the equidistant approach in bias correction of precipitation, Atmospheric Science Letters, 15, 1-
Webb, A., T. Shimura and N. Mori. 2019. Global tropical cyclone track detection and analysis of the
d4PDF Mega-ensemble projection, Journal of JSCE B2 (Coastal Eng.), 75(2), I_1207–I_1212.
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