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Featured researches published by Hajime Iida.


Journal of Environmental Science and Health Part A-toxic\/hazardous Substances & Environmental Engineering | 2011

Number concentration and size distribution of ultrafine particles on the roadside of the Tateyama-Kurobe Alpine route, Japan

Koichi Watanabe; Hideharu Honoki; Fuminori Endo; Takashi Murakami; Yuki Yoshida; Hajime Iida; Yoshitoshi Uehara; Atsushi Kume

Measurements of ultrafine particles (UFPs) with diameters smaller than 100 nm were made with a Scanning Mobility Particle Sizer on the roadside of the Tateyama-Kurobe Alpine route on the western slope of Mt. Tateyama, Japan, in the summer and autumn of 2007 and 2008. The number concentrations of nanoparticles (NPs) with diameters smaller than 50 nm increased sharply in the morning. This increase agreed with that of the NO concentration, which is a good indicator of vehicle emissions. Although the peak concentration of NO was also detected in the late afternoon, the concentrations of NPs did not increase. The vehicle emission of UFPs may vary considerably with the driving conditions. The emission of NPs might have been accelerated under a high engine-load condition. The NP concentrations in October were much higher than those in August, although there were more buses in August than in October. The number size distribution in the morning was bimodal, with the first peak around 20–30 nm and the second one around 70–80 nm. The first peak became small during the daytime. The first peak disappeared, and a small second peak remained through midnight.


Bulletin of glaciological research | 2007

Deposition analysis of non sea-salt sulfate and nitrate along to the northwest winter monsoon in Hokuriku district by a snow boring core and bulk samples

Hideharu Honoki; Koichi Watanabe; Hajime Iida; Kunio Kawada; Kazuichi Hayakawa


Bulletin of glaciological research | 2006

Study of the internal structure of the Kuranosuke snow patch in central Japan using ground penetrating radar survey

Hideo Sakai; Yasuhiro Ura; Takayuki Nakano; Hajime Iida; Katsunori Muroi


Bulletin of glaciological research | 2017

Experimental Observations of Two Mountain Glaciers on the Eastern Slope of Mt. Tsurugi by Pi-SAR2 Airborne SAR

Masato Furuya; Kotaro Fukui; Hajime Iida; Shoichiro Kojima; Takeshi Matsuoka


The American Journal of Gastroenterology | 2015

The abrupt changes in water level and temperature of the Shinyu hot spring pond, Tateyama Caldera in 2014

Kotaro Fukui; Shigeru Kikukawa; Hajime Iida; Yusuke Goto


The American Journal of Gastroenterology | 2014

The temporary disappearance of hot water in Shinyu hot spring pond, Tateyama Caldera

Kotaro Fukui; Shigeru Kikukawa; Hajime Iida; Yusuke Goto


The American Journal of Gastroenterology | 2014

Soundings of ice thickness and flows of the Kuranosuke and Ikenotan-migimata perennial snow patches, the northern Japanese Alps

Kotaro Fukui; Hajime Iida


Japan Geoscience Union | 2014

Identifyig the ice thickness of five perennial snow patches in the Tateyama Mountains based on GPR soundings

Kotaro Fukui; Hajime Iida


Japan Geoscience Union | 2014

Studies on internal structure of active glacier in the Tateyama Mountains

Hajime Iida; Kotaro Fukui


The American Journal of Gastroenterology | 2013

Tateyama Mountains as "a Geo-heritage"

Hajime Iida; Kotaro Fukui

Collaboration


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Kotaro Fukui

National Institute of Polar Research

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Koichi Watanabe

Toyama Prefectural University

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Fuminori Endo

Toyama Prefectural University

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Shoichiro Kojima

National Institute of Information and Communications Technology

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Takashi Murakami

Toyama Prefectural University

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