Statistical atmospheric downscaling for rainfall estimation in Kyushu Island, Japan

Cintia Bertacchi Uvo, Jonas Olsson, Osamu Morita, Kenji Jinno, Akira Kawamura, Koji Nishiyama, Nobukazu Koreeda, Takanobu Nakashima

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The present paper develops linear regression models based on singular value decomposition (SVD) with the aim of downscaling atmospheric variables statistically to estimate average rainfall in the Chikugo River Basin, Kyushu Island, southern Japan, on a 12-hour basis. Models were designed to take only significantly correlated areas into account in the downscaling procedure. By using particularly precipitable water in combination with wind speeds at 850 hPa, correlation coefficients between observed and estimated precipitation exceeding 0.8 were reached. The correlations exhibited a seasonal variation with higher values during autumn and winter than during spring and summer. The SVD analysis preceding the model development highlighted three important features of the rainfall regime in southern Japan: (1) the so-called Bai-u front which is responsible for the majority of summer rainfall. (2) the strong circulation pattern associated with autumn rainfall, and (3) the strong influence of orographic lifting creating a pronounced east-west gradient across Kyushu Island. Results confirm the feasibility of establishing meaningful statistical relationships between atmospheric state and basin rainfall even at time scales of less than one day.

Original languageEnglish
Pages (from-to)259-271
Number of pages13
JournalHydrology and Earth System Sciences
Volume5
Issue number2
Publication statusPublished - 2001

Fingerprint

downscaling
rainfall
autumn
decomposition analysis
precipitable water
summer
seasonal variation
river basin
wind velocity
decomposition
timescale
winter
basin

All Science Journal Classification (ASJC) codes

  • Water Science and Technology
  • Earth and Planetary Sciences (miscellaneous)

Cite this

Uvo, C. B., Olsson, J., Morita, O., Jinno, K., Kawamura, A., Nishiyama, K., ... Nakashima, T. (2001). Statistical atmospheric downscaling for rainfall estimation in Kyushu Island, Japan. Hydrology and Earth System Sciences, 5(2), 259-271.

Statistical atmospheric downscaling for rainfall estimation in Kyushu Island, Japan. / Uvo, Cintia Bertacchi; Olsson, Jonas; Morita, Osamu; Jinno, Kenji; Kawamura, Akira; Nishiyama, Koji; Koreeda, Nobukazu; Nakashima, Takanobu.

In: Hydrology and Earth System Sciences, Vol. 5, No. 2, 2001, p. 259-271.

Research output: Contribution to journalArticle

Uvo, CB, Olsson, J, Morita, O, Jinno, K, Kawamura, A, Nishiyama, K, Koreeda, N & Nakashima, T 2001, 'Statistical atmospheric downscaling for rainfall estimation in Kyushu Island, Japan', Hydrology and Earth System Sciences, vol. 5, no. 2, pp. 259-271.
Uvo, Cintia Bertacchi ; Olsson, Jonas ; Morita, Osamu ; Jinno, Kenji ; Kawamura, Akira ; Nishiyama, Koji ; Koreeda, Nobukazu ; Nakashima, Takanobu. / Statistical atmospheric downscaling for rainfall estimation in Kyushu Island, Japan. In: Hydrology and Earth System Sciences. 2001 ; Vol. 5, No. 2. pp. 259-271.
@article{07a82fa8fb894360a62479ab6aa875f4,
title = "Statistical atmospheric downscaling for rainfall estimation in Kyushu Island, Japan",
abstract = "The present paper develops linear regression models based on singular value decomposition (SVD) with the aim of downscaling atmospheric variables statistically to estimate average rainfall in the Chikugo River Basin, Kyushu Island, southern Japan, on a 12-hour basis. Models were designed to take only significantly correlated areas into account in the downscaling procedure. By using particularly precipitable water in combination with wind speeds at 850 hPa, correlation coefficients between observed and estimated precipitation exceeding 0.8 were reached. The correlations exhibited a seasonal variation with higher values during autumn and winter than during spring and summer. The SVD analysis preceding the model development highlighted three important features of the rainfall regime in southern Japan: (1) the so-called Bai-u front which is responsible for the majority of summer rainfall. (2) the strong circulation pattern associated with autumn rainfall, and (3) the strong influence of orographic lifting creating a pronounced east-west gradient across Kyushu Island. Results confirm the feasibility of establishing meaningful statistical relationships between atmospheric state and basin rainfall even at time scales of less than one day.",
author = "Uvo, {Cintia Bertacchi} and Jonas Olsson and Osamu Morita and Kenji Jinno and Akira Kawamura and Koji Nishiyama and Nobukazu Koreeda and Takanobu Nakashima",
year = "2001",
language = "English",
volume = "5",
pages = "259--271",
journal = "Hydrology and Earth System Sciences",
issn = "1027-5606",
publisher = "European Geosciences Union",
number = "2",

}

TY - JOUR

T1 - Statistical atmospheric downscaling for rainfall estimation in Kyushu Island, Japan

AU - Uvo, Cintia Bertacchi

AU - Olsson, Jonas

AU - Morita, Osamu

AU - Jinno, Kenji

AU - Kawamura, Akira

AU - Nishiyama, Koji

AU - Koreeda, Nobukazu

AU - Nakashima, Takanobu

PY - 2001

Y1 - 2001

N2 - The present paper develops linear regression models based on singular value decomposition (SVD) with the aim of downscaling atmospheric variables statistically to estimate average rainfall in the Chikugo River Basin, Kyushu Island, southern Japan, on a 12-hour basis. Models were designed to take only significantly correlated areas into account in the downscaling procedure. By using particularly precipitable water in combination with wind speeds at 850 hPa, correlation coefficients between observed and estimated precipitation exceeding 0.8 were reached. The correlations exhibited a seasonal variation with higher values during autumn and winter than during spring and summer. The SVD analysis preceding the model development highlighted three important features of the rainfall regime in southern Japan: (1) the so-called Bai-u front which is responsible for the majority of summer rainfall. (2) the strong circulation pattern associated with autumn rainfall, and (3) the strong influence of orographic lifting creating a pronounced east-west gradient across Kyushu Island. Results confirm the feasibility of establishing meaningful statistical relationships between atmospheric state and basin rainfall even at time scales of less than one day.

AB - The present paper develops linear regression models based on singular value decomposition (SVD) with the aim of downscaling atmospheric variables statistically to estimate average rainfall in the Chikugo River Basin, Kyushu Island, southern Japan, on a 12-hour basis. Models were designed to take only significantly correlated areas into account in the downscaling procedure. By using particularly precipitable water in combination with wind speeds at 850 hPa, correlation coefficients between observed and estimated precipitation exceeding 0.8 were reached. The correlations exhibited a seasonal variation with higher values during autumn and winter than during spring and summer. The SVD analysis preceding the model development highlighted three important features of the rainfall regime in southern Japan: (1) the so-called Bai-u front which is responsible for the majority of summer rainfall. (2) the strong circulation pattern associated with autumn rainfall, and (3) the strong influence of orographic lifting creating a pronounced east-west gradient across Kyushu Island. Results confirm the feasibility of establishing meaningful statistical relationships between atmospheric state and basin rainfall even at time scales of less than one day.

UR - http://www.scopus.com/inward/record.url?scp=0034871307&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034871307&partnerID=8YFLogxK

M3 - Article

VL - 5

SP - 259

EP - 271

JO - Hydrology and Earth System Sciences

JF - Hydrology and Earth System Sciences

SN - 1027-5606

IS - 2

ER -