Masahiro Hosaka
Japan Meteorological Agency
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Featured researches published by Masahiro Hosaka.
Journal of Geophysical Research | 2012
Masashi Niwano; Teruo Aoki; Katsuyuki Kuchiki; Masahiro Hosaka; Yuji Kodama
[1]xa0We developed a multilayered physical snowpack model named Snow Metamorphism and Albedo Process (SMAP), which is intended to be incorporated into general circulation models for climate simulations. To simulate realistic physical states of snowpack, SMAP incorporates a state-of-the-art physically based snow albedo model, which calculates snow albedo and solar heating profile in snowpack considering effects of snow grain size and snow impurities explicitly. We evaluated the performance of SMAP with meteorological and snow impurities (black carbon and dust) input data measured at Sapporo, Japan during two winters: 2007–2008 and 2008–2009, and found SMAP successfully reproduced all observed variations of physical properties of snowpack for both winters. We have thus confirmed that SMAP is suitable for climate simulations. With SMAP, we also investigated the effects of snow impurities on snowmelt at Sapporo during the two winters. We found that snowpack durations at Sapporo were shortened by 19 days during the 2007–2008 winter and by 16 days during the 2008–2009 winter due to radiative forcings caused by snow impurities. The estimated radiative forcings due to snow impurities during the accumulation periods were 3.7 W/m2 (it corresponds to albedo reduction in 0.05) and 3.2 W/m2 (albedo reduction in 0.05) for the 2007–2008 and 2008–2009 winters, respectively. While during the ablation periods they were 25.9 W/m2 (albedo reduction in 0.18) and 21.0 W/m2 (albedo reduction in 0.17) for each winter, respectively.
Journal of Geophysical Research | 2011
Teruo Aoki; Katsuyuki Kuchiki; Masashi Niwano; Yuji Kodama; Masahiro Hosaka; Taichu Y. Tanaka
Papers in Meteorology and Geophysics | 2013
Yukimasa Adachi; Seiji Yukimoto; Makoto Deushi; Atsushi Obata; Hideyuki Nakano; Taichu Y. Tanaka; Masahiro Hosaka; Tomonori Sakami; Hiromasa Yoshimura; Mikitoshi Hirabara; Eiki Shindo; Hiroyuki Tsujino; Ryo Mizuta; Shoukichi Yabu; Tsuyoshi Koshiro; Tomoaki Ose; Akio Kitoh
Bulletin of glaciological research | 2014
Masashi Niwano; Teruo Aoki; Katsuyuki Kuchiki; Masahiro Hosaka; Yuji Kodama; Satoru Yamaguchi; Hiroki Motoyoshi; Yukiyoshi Iwata
Bulletin of glaciological research | 2018
Sumito Matoba; Masashi Niwano; Tomonori Tanikawa; Yoshinori Iizuka; Tetsuhide Yamasaki; Yutaka Kurosaki; Teruo Aoki; Akihiro Hashimoto; Masahiro Hosaka; Shin Sugiyama
Japan Geoscience Union | 2014
Naohiko Hirasawa; Konosuke Sugiura; Masahiro Hosaka; Trofim C. Maximov
Japan Geoscience Union | 2014
Shin’ichi Miyazaki; Kazuyuki Saito; Takeshi Yamazaki; Takeshi Ise; Junko Mori; Hazuki Arakida; Tomohiro Hajima; Masahiro Hosaka; Yoshihiro Iijima; Akihiko Ito; Yojiro Matsuura; Masashi Niwano; Ryouta O'ishi; Takeshi Ohta; Hotaek Park; Atsushi Sato; Tetsuo Sueyoshi; Atsuko Sugimoto; Rikie Suzuki; Satoru Yamaguchi; Kei Yoshimura
Archive | 2012
Seiji Yukimoto; Yukimasa Adachi; Masahiro Hosaka; Tomonori Sakami; Hiromasa Yoshimura; Mikitoshi Hirabara; T. Tanaka; Eiki Shindo; Hiroyuki Tsujino; Makoto Deushi; Ryo Mizuta; Shoukichi Yabu; Atsushi Obata; Hideyuki Nakano; Tsuyoshi Koshiro; Tomoaki Ose; Akio Kitoh
Journal of Geophysical Research | 2012
Masashi Niwano; Teruo Aoki; Katsuyuki Kuchiki; Masahiro Hosaka; Yuji Kodama
Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research | 2011
Masashi Niwano; Teruo Aoki; Katsuyuki Kuchiki; Masahiro Hosaka; Yuji Kodama; Yukiyoshi Iwata