北部チベット高原における河川流量の変動と気温との関係(1990年夏)

概要

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The scientific expedition was carried out from the Taklimakan desert (altitude 1000m) to the Tibet plateau (4000-5000m) passing through Kunlun mountains (over 5000m) by the members of Japan-China Joint Project which name was Kekexili, China Region Science Expedition. Daily fluctuations were observed in flow rate of river water at camp sites (altitude about 4700m). This phenomena were explained from observations of atmospheric and river water temperature : 1) Melt water from frozen ground is re-frozen and constructed embankment by ice on surface ground at night. 2) Following melt water is saved into unfrozen ground and flow late of river water is decreased slowly. 3) When atmospheric temperature is rise up above 0℃, ice embankment is melted and changed to water. 4) This time, saved water is added melt water and flow rate is increased quickly.
横浜国立大学の論文