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Two new genera and species of conifers discovered from upper Cretaceous in Hokkaido, Japan
coniferous tree ecosystem acetate
2021/8/11
Paleobotanists describe two new genera of ancient conifers based on two beautifully preserved 3-D fossil seed cones. These new conifers belong to the cypress family, which was important in many ecosys...
Formation processes of the 1909 Tarumai and the 1944 Usu lava domesin Hokkaido,Japan
lava domes Tarumai volcano Usu volcano squeeze of magma growth rate of domes Hagen-Poiseuille's Law
2015/9/11
The formation of the two particular lava domes in Hokkaido, Japan is described and interpreted mainly from geophysical viewpoints. The 1909 eruption of Tarumai volcano was not violent but produced a l...
Sulfur isotopic study of ore minerals and altered host rocks of Neogene–Quaternary overprinting hydrothermal systems in the Toyoha–Muine area, southwest Hokkaido, Japan
sulfur isotopes overprinting hydrothermal systems ore minerals alteration Toyoha–Muine
2017/4/11
Sulfur isotopes in vein sulfides (galena, sphalerite, and pyrite) and pyrite sulfur derived from overprinting hydrothermal
systems in the altered volcanic host rocks of the Toyoha–Muine area are dete...
Diurnal variations of polar organic tracers in summer forest aerosols: A case study of a Quercus and Picea mixed forest in Hokkaido, Japan
secondary organic aerosol isoprene 2-methyltetrols levoglucosan
2017/4/12
We investigated the summertime formation of secondary organic aerosols (SOA) via the oxidation of isoprene, α/β-
pinene and β-caryophyllene in a Quercus crispula and Picea glehnii mast mixed forest l...
Stable and noble gas isotopic study of thermal and groundwaters in northwestern Hokkaido, Japan and the occurrence of geopressured fluids
geopressured fluid hydrogen isotope oxygen isotope helium isotope Hokkaido
2017/8/9
Thermal and groundwaters are distributed along the west coast and in the inland region of Northwestern Hokkaido, Japan. The waters in the latter group have relatively high temperatures. Stable (D, O) ...
Results of subionospheric radio LF monitoring prior to the Tokachi (M=8, Hokkaido, 25 September 2003) earthquake
subionospheric radio LF monitoring the Tokachi earthquake
2009/12/14
Results of simultaneous LF subionospheric monitoring over two different propagation paths prior to the very strong Tokachi earthquake (near the east coast of Hokkaido Island, 25 September 2003) of mag...
Contributions of Snow to the Annual Water Balance in Moshiri Watershed,Northern Hokkaido,Japan
Contributions of Snow Annual Water Balance Moshiri Watershed
2009/10/23
Characteristics of the water balance were investigated in an experimental watershed
where there is a seasonal snow cover. To estimate the basin-wide snowmelt
by the heat balance method, seven observ...
Seasonal changes and horizontal distribution of zooplankton in Lake Takkobu, Kushiro Marsh, Hokkaido
community structure biomass food web
2009/4/1
The occurrence characteristics of zooplankton in Lake Takkobu, a shallow eutrophic lake located in the eastern edge of the Kushiro wetland in Hokkaido, were studies in 2003. In the lake, 17 species of...
Predominance of Stenopsyche marmorata Navas larvae immediately downstream of Iwaonai Dam in the Teshio River, Hokkaido, Japan
dam reservoir
2009/4/1
We examined the density of aquatic invertebrates downstream from Iwaonai Dam in the upper reach of the Teshio River, Hokkaido.
Long-period ground motion and deep subsurface structure in Hokkaido: A review
Long-period ground motion Basin-induced surface wave Basin-transduced surface wave Deep subsurface structure
2009/3/5
We review studies of long-period ground motion and surveys of deep subsurface structure in Hokkaido. The long-period ground motion studies have been begun by using JMA strong-motion records. The recor...
Temperature changing process of the Hokkaido (Japan) earthquake on 25 September 2003
Temperature changing process the Hokkaido (Japan) earthquake
2009/12/30
The paper introduced the model of the additive tectonics stress from celestial tide-generating force. The model can be used to explain the relationship between additive tectonics stress and seismic fa...
Temperature changing process of the Hokkaido (Japan) earthquake on 25 September 2003
Temperature changing process Hokkaido earthquake 25 September 2003
2010/1/4
The paper introduced the model of the additive tectonics stress from celestial tide-generating force. The model can be used to explain the relationship between additive tectonics stress and seismic fa...
Acyclic hydrocarbons and ketones in cold-seep carbonates from central Hokkaido, northern Japan
anaerobic oxidation of methane biomarker cold-seep carbonate fossil chemosynthetic community isoprenoid ketones
2017/8/10
Limestones associated with fossil chemosynthetic biological communities are found in Tappu Kanajirizawa and Teshionakagawa Abeshinaigawa, central Hokkaido, northern Japan. They were studied to ascerta...
Heterogeneities of hydrocarbon compositions in mudstones of a turbiditic sequence of the Miocene Kawabata Formation in Yubari, central Hokkaido, Japan
hydrocarbon biomarker turbiditic sequence geochemical heterogeneity terrigenous material transport paleoenvir
2017/8/10
Biomarker analyses of aliphatic and aromatic hydrocarbons were conducted on the upper and lower parts of individual mudstones in a turbiditic sequence of the Miocene Kawabata Formation, Yubari, centra...
Disturbances in VHF/UHF telemetry links as a possible effect of the 2003 Hokkaido Tokachi-oki earthquake
VHF/UHF telemetry links a possible effect the 2003 Hokkaido Tokachi-oki earthquake
2009/12/30
The data on radio telemetry links (for water information) at VHF/UHF in Hokkaido are used to investigate the rate of disturbances on radio links (or connection failure) and its association with a huge...