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等离子体被认为是物质的除气、液、固之外的第四态,是以正负带电粒子的形式共存的状态。宇宙中的99.9%的物质处于等离子体状态,例如大气电离层、恒星、行星、星云以及星际物质等。人们也能通过实验手段在实验室产生等离子体,例如放电等离子体、激光等离子体和核聚变等离子体等。
In this paper, the author reviews the present situation of basin artificial recharge of ground water (MAR: managed aquifer recharge) as of 2007 in Japan. Most of the artificial recharge of basin metho...
Urbanization affects quantitatively and qualitatively groundwater environment in urban area. Especially, groundwater environment in large urban area has been changed more than several decades. However...
Isotopic compositions were analyzed to grasp the altitude effect observed in and the discharge characteristics of river water in Yakushima Island, southwestern Japan. The isotopic characteristics of t...
Surface Wave Dispersion for some Eurasian Paths.I.Rayleigh Waves from Kamchatka and Japan to Finland.
On the Exceptional Earthquake Swarm Activity at Matsushiro, Japan.
On the basis of in situ NO3-1 microprofiles and chamber incubations complemented by laboratory-based assessments of anammox and denitrification we evaluate the nitrogen turnover of an ocean margin sed...
We present vertical profiles of the aerosol extinction coefficient retrieved from ground-based Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) measurements at Tsukuba, Japan (36.1° ...
On the basis of in situ NO{ 3 microprofiles and chamber incubations complemented by laboratory-based assessments of anammox and denitrification we evaluate the nitrogen turnover of an ocean margin s...
A series of numerical experiments were conducted in order to investigate the impact of global warming on snow amount in Japan during early winter. After confirming the accuracy of hindcast simulations...
We produced a new gauge-based analysis of daily precipitation over Japan from 1981 to 2000 on a 0.01° grid. Wind-induced undercatch was adjusted at each observation station, and orographic effects wer...
A statistical approach that considers the bias and uncertainty of models is proposed for interpreting the simulated river discharge as a flood risk. A 29-year simulation was performed to estimate para...
The depth profile of 36Cl/Cl ratio in groundwater was investigated in the Tsukuba Upland of central Japan. The obtained results clearly show the influence of bomb-produced 36Cl; the highest 36Cl/Cl ra...
The recent population increase and economic development have increased the energy demand in many countries. As global fossil fuel reserves are limited, it is highly likely that the supply of fossil fu...
Measurements of CO2 flux (FCO2) and H2O flux (FH2O) were carried out on paddy fields of Thailand and Japan during the 2004, 2005 and 2006 growing seasons using the Bowen ratio technique. The objective...

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