scholarly journals Revealing our melting past: Rescuing historical snow and ice data

GeoResJ ◽  
2017 ◽  
Vol 14 ◽  
pp. 92-97 ◽  
Author(s):  
Jack Maness ◽  
Ruth Duerr ◽  
Michael Dulock ◽  
Florence Fetterer ◽  
Gloria Hicks ◽  
...  
Keyword(s):  
Author(s):  
Mahesh Kumar Gaur ◽  
R. K. Goyal ◽  
M. S. Raghuvanshi ◽  
R. K. Bhatt ◽  
M. Pandian ◽  
...  
Keyword(s):  

2014 ◽  
Vol 19 (12) ◽  
pp. 04014034 ◽  
Author(s):  
Noriaki Ohara ◽  
SuHyung Jang ◽  
Shuichi Kure ◽  
Z. Q. Richard Chen ◽  
M. Levent Kavvas

2020 ◽  
Vol 72 (1) ◽  
Author(s):  
Hirofumi Niiya ◽  
Kenichi Oda ◽  
Daisuke Tsuji ◽  
Hiroaki Katsuragi

Abstract The formation of aggregates consisting of snow, water, and tephra has been reported in small-scale experiments on three-phase flows containing tephra, water, and snow, representing lahars triggered by snowmelt. Such aggregates reduce the mobility of mud flow. However, the formation mechanism of such aggregates under various conditions has not been investigated. To elucidate the formation conditions and mechanical properties of the aggregates, we performed mixing experiments with materials on a rotating table and compression tests on the resulting aggregates with a universal testing machine in a low-temperature room at $$0\,^{\circ }\text {C}$$ 0 ∘ C . From experiments with varying component ratios of the mixture and tephra diameter, the following results were obtained: (i) the aggregate grew rapidly and reached maturity after a mixing time of 5 min; (ii) the mass of aggregates increased with snow concentration, exhibiting an approximately linear relationship; (iii) single aggregates with large mass formed at lower and higher tephra concentrations, whereas multiple aggregates with smaller mass were observed at intermediate concentrations; (iv) the shape of the aggregate satisfied the similarity law for an ellipsoid; (v) the compressive mechanical behavior could be modeled by an empirical nonlinear model. The obtained mechanical properties of the aggregates were independent of the experimental conditions; (vi) scaling analysis based on the Reynolds number and the strength of the aggregates showed that the aggregates cannot form in ice-slurry lahars. Our findings suggest that low-speed lahars containing snow and ice are likely to generate aggregates, but snow and ice in the ice-slurry lahars are dispersed without such aggregates.


Author(s):  
Tomonori Tanikawa ◽  
Kazuhiko Masuda ◽  
Hiroshi Ishimoto ◽  
Teruo Aoki ◽  
Masahiro Hori ◽  
...  

1991 ◽  
Vol 103 (1) ◽  
pp. 34-41 ◽  
Author(s):  
GEORGE L. BLAISDELL
Keyword(s):  

2002 ◽  
Vol 34 (2) ◽  
pp. 127-134 ◽  
Author(s):  
Xinqing Lee ◽  
Dahe Qin ◽  
Hui Zhou ◽  
Guibin Jiang

1995 ◽  
Vol 311 (2) ◽  
pp. 141-151 ◽  
Author(s):  
W. Chisholm ◽  
K.J.R. Rosman ◽  
C.F. Boutron ◽  
J.P. Candelone ◽  
S. Hong

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