The researcher of glacIers maintainoo that: place over 3000m altitude belongs to seasonal cold desert band area,where there is permanent frozen layer under 0.8m land surface,so it's the forbbidden zone of trees.
Problems of such kind arise in glaciology when one estimates the stability of snow on mountain slopes or determines the catastrophic movement of a glacier; the results can also be applied to solifluction phenomena [2, 3].
It was assumed that the temperature at the bed of the glacier could reach the melting point due to nonstationary heating and that the conditions would be produced for motion of the glacier.
Here we examine the nonstationary response of a glacier to small deviations of the system parameters from critical values corresponding to the stationary state.
These corresponding chalcones were reacted with phenyl hydrazide in glacial acetic acid, which led to the formation of novel 4-[5-(substituted phenyl)-1-phenyl-4,5-dihydro-1H-3-pyrazolyl]-2-methylphenol derivatives.
15 m/ka occurred in the mono-depositional sink of the former Changjiang River mouth during 10 000-8000 aBP, when post-glacial transgression happened and the Changjiang water level remained at lower stand.
A procedure for the determination of sodium salts of methyl sulfamic acid as tertiary amines by acidimétrie titration in glacial acetic acid was developed.
The distribution of Abies was deeply influenced by geological events such as the uplift of Himalaya, the Alps, the Rocky Mountains, the occurrence of the Asian Monsoon as well as the Quaternary glaciers.
The advances and retreats of glaciers and the accompanying regressions and transgressions of the ocean level caused isolation of chum salmon in the refugia belonging hypothetically to the paleo-Shuifen and paleo-Amur regions.
In our view, microgeographic subdivision of the populations is caused by recurrent fragmentation of habitats during the Pleistocene glaciation of the Bale Massif and subsequent prolonged isolation of local populations.
The types of mtDNA genetic variability and mismatch distribution between haplotypes in the populations indicate that the southern regions of the Sea of Okhotsk and Sea of Japan served as refugia for chum salmon during glaciation periods.
Differences between the seasonal races of the Amur chum salmon are insignificant, and their emergence dates back to the period of the last Wisconsinian glaciation.
Chromosomal inversion polymorphism was studied in a natural population of Drosophila subobscura from the Djerdap gorge of the Danube River, which is one of southeastern European continental refugia during the last glaciation period.
This paper reports the discovery of an endangerde plant in Fujian. The discovery not only enriches the plants resources in Fujian,but also provides important scientific value in studying palaeoflora,palaeogeography,ice-age of alluviumperiod and flora of Fujian.This species is very big and high and straight,and it can grow very quickly,therefore it canbe used as an important forest plant of the mountain areas at an altitude of 600 metres abovesea level in Fujian.
The present paper reporst the results of the expedition cafried bythe lnsect Scientific Expedition to the Mount Gutian(29.3N,118.2E),Zhe-jiang Province,in 1992~1994.The basic characteristics of the insect faunaof the Mount Gutian are that this area seems to be situated in the north partof Oriental Region, and it riches in Endemic species,According to the author’spoint of view, the main factors which effect the origin and evolution of thefauna in the area are(1) changes in landforms and climates throughout ...