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Volume 58 (1996)
- Issue 6 Pages 455-
- Issue 5 Pages 389-
- Issue 4 Pages 285-
- Issue 3 Pages 205-
- Issue 2 Pages 107-
- Issue 1 Pages 3-
Volume 58, Issue 4
Displaying 1-7 of 7 articles from this issue
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Fuyuki SATOH, Kaichiro SASA, Koichiro FUJIWARA1996 Volume 58 Issue 4 Pages 285-294
Published: July 15, 1996
Released on J-STAGE: February 05, 2010
JOURNAL FREE ACCESSThe chemical composition of snowfalls in the Teshio Experimental Forest Hokkaido University in northern Hokkaido was investigated from December 1990 to March 1995. Although there was no industrial source of acid pollutants around the study area, most of the snowfalls observed were “acid snow”. with pH valnes less than 5.6. The pH values of snofalls after cyclones were lower than those before cyclones. Snow were brought from W in the Japan Sea side and from N in the Okhotsk Sea side, the former is important to monitor acid pollutants which are likely to be transported from the Chinese mainland.
Although non-seasalt SO42- was relatively rich in the snowfalls in the Japan Sea side, there was no difference in pH of snowfalls with different wind directions. The presence of non-seasalt Ca2+in the Japan Sea side snowfalls suggested that the acidity of snowfalls was partly neutralized by the soil particles in the air, such as loess particles, covering over the Continent.View full abstractDownload PDF (4164K) -
Keisuke SUZUKI, Yasunori WATANABE1996 Volume 58 Issue 4 Pages 295-301
Published: July 15, 1996
Released on J-STAGE: February 05, 2010
JOURNAL FREE ACCESSThe variations of anion concentration and biological activity in the snowpacks were studied at an open site, a deciduous forest site and a coniferous forest site. Concentrations of major anions in the snowpack are higher at the coniferous forest site than at both the open site and the deciduous forest site. Concentrations of major anions gradually decrease as the snowmelt progressed. Concentration of PO43- in the snowpack increases as the snowmelt progressed. Concentration of chlorophyl-a in the snowpack is higher at the coniferous forest site than at both the open site and the deciduous forest site. Concentrations of chlorophyl-a in the snowpack at both deciduous and coniferous forest site increase during the snowmelt season. Activity of snow algae is considered to be large during the snowmelt season.
By the incubation experiment, NO3 of the sample collected at coniferous forest site is consumed probably by the snow algae. Consumption of nitrogen by Scenedesmus is estimated by the incubation experiment as 220μg/lfrom the snow-pack.View full abstractDownload PDF (5969K) -
Junsei KONDO, Jianqing XU1996 Volume 58 Issue 4 Pages 303-316
Published: July 15, 1996
Released on J-STAGE: August 07, 2009
JOURNAL FREE ACCESSThe effect of snow cover on the heat balance of the ground surface in north-western China is investigated with a heat-water balance model. (1) The calculated snow accumulating and melting processes are in close agreement with the routine observations. Significant correlation is found between the maximum snow water equivalent (or the last day of snow) and the integrated heat fluxes for the long period from snow melting season to early summer. (2) The ground surface temperature begins to rise just after the snow desappearance. Consequently the sensible and latent heat fluxes increase abruptly from a negative value to a positive one. The water content in the top soil layer increases for about 10 days due to the melt water, then the water content decreases to a small value, so that the sensible heat flux becomes small. (3) In arid and semi-arid regions, a greater part of rain water is lost by evaporation within a few days after the rainfall, so the water resources becomes very little. At a region with snow cover in winter, however, a considerable amount of melt water formed in the spring makes a contribution to the water resources.View full abstractDownload PDF (7121K) -
A calculation model on avalanche deceleration caused by bend at gradient change to gentler down-sideChiko BOJO, Hiroshi MATSUDA, Yoshinori KOYAMA1996 Volume 58 Issue 4 Pages 317-320
Published: July 15, 1996
Released on J-STAGE: August 07, 2009
JOURNAL FREE ACCESS -
Teruyoshi UMEMURA1996 Volume 58 Issue 4 Pages 321-328
Published: July 15, 1996
Released on J-STAGE: August 07, 2009
JOURNAL FREE ACCESS -
Masaaki ISHIZAKA1996 Volume 58 Issue 4 Pages 329-338
Published: July 15, 1996
Released on J-STAGE: February 05, 2010
JOURNAL FREE ACCESS -
Interatomic models of H2O molecule, water, and iceKatsuyuki KAWAMURA1996 Volume 58 Issue 4 Pages 339-342
Published: July 15, 1996
Released on J-STAGE: August 07, 2009
JOURNAL FREE ACCESS
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