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CHARACTERISTICS OF CONCENTRATION AND ISOTOPIC RATIOS OF THE ATMOSPHERIC CO_2 IN NORTHWEST CHINA

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Chinese Science Bulletin 1992年第20期37卷 1717-1720页

作者：张柳明徐永昌 National Laboratory of Gasgeochemistry Lanzhou Institute of Geology Academia Sinica Lanzhou 730000 PRC Lanxhou Institute of Glaciology & GeocryologyAcademia Sinica National Laboratory of Gasgeochemistry Lanzhou Institute of Geology Academia Sinica Lanzhou 730000 PRC

Between Jan. 1.89 and Feb. 1.90, 259 samples of air （2—1. m above the ground） were collected in five regions of different ecological environments in the northwest of China for measuring the concentration and isotopic ratios of the atmospheric CO2. The results are reported and it is proposed that the δ1.O of the atmospheric CO2 can be used as an indicator of the CO2 contamination from human source.

关键词： atmospheric CO2 δ1.C δ1.O

Modern atmospheric environmental records in Guliya Ice Cap of Qinghai-Xizang Plateau

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Chinese Science Bulletin 1995年第10期40卷 874-876页

作者：李忠勤姚檀栋谢自楚 L. G. Thompson J. Dai institute of {1. and geocryology Chinese Academy of Sciences Lanzhou 730000 China Byrd Polar Research Center Ohio State University USA

Carrying dry and wet deposition records of aerosols in the mid-to upper-troposphereabove northwestern Qinghai-Xizang Plateau, the Guliya Ice Core extracted in 1.92 at the el-evation of 6 400m on Guliya Ice Cap of western Kunlun Mt. has provided a uniqueopportunity to improve our understanding of atmospheric emvironment in this area. Onthe basis of studies on firn-ice transition of the ice cap, depositional processes

关键词： Ca Modern atmospheric environmental records in Guliya Ice Cap of Qinghai-Xizang Plateau

Glacier changes in the eastern Nyainqêntanglha Range of Tibetan Plateau from 1.75 to 201.

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Journal of Mountain Science 2016年第4期13卷 682-692页

作者： JI Qin YANG Tai-bao HE Yi CHEN Jie WANG Kai institute of {1. and Ecogeography College of Earth and Environmental SciencesLanzhou University

Maritime-type glaciers in the eastern Nyainqêntanglha Range, located in the southeastern part of the Tibetan Plateau, are an important water source for downstream residents and ecological systems. To better understand the variability of glaciers in this region, we used the band ratio threshold（TM3/TM5 for the Landsat TM /ETM＋ and TM4/TM6 for Landsat OLI） to extract glacier outlines in ~1.99 and ~201.. After that, we also generated a series of glacier boundaries and monitored glacier variations in the past 40 years with the help of the Chinese Glacier Inventory data（1.75） and Landsat TM, ETM＋ and OLI data. The total glacier area decreased by 37.69 ± 2.84% from 1.75 to 201.. The annual percentage area change（APAC） was ~1.32% a-1.and ~1.29% a-1.in the periods 1.75-1.99 and 1.99-201., respectively. According to the lag theory, the reaction time is probably about 1. years and we discuss the variations of temperature and precipitation between 1.65 and 201.. Temperature and precipitation increased between 1.65 and 201. at a rate of 0.34°C /1. a and 1..4 mm/1. a, respectively. Extensive meteorological data show that the glacier shrinkage rate over the period may be mainly due to increasing air temperature, while the increasing precipitation partly made up for the mass loss of glacier ice resulting from increasing temperature may also lead to the low APAC between 1.99 and 201.. The lag theory suggests that glacier shrinkage may accelerate in the next 1. years. Small glaciers were more sensitive to climate change, and there was a normal distribution between glacier area and elevation. Glaciers shrank in all aspects, and south aspects diminished faster than others.

关键词： Glacier variation Climate change Nyainqêntanglha Range Temperature Precipitation

Mechanism of frost heave by film water migration under temperature gradient

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Chinese Science Bulletin 1997年第15期42卷 1290-1294页

作者： Xu, XZ Wang, JC Zhang, LX Deng, YS Chuvilin, EM Yershov, ED Ishizaki, T Fukuda, M State Key Laboratory of Frozen Soil Engineering Lanzhou Institute of Glaciology and Geocryology Chinese Academy of Sciences Lanzhou China Geological Faculty of Moscow University Russia institute of Low Temperature Science Hokkaido University Japan

IT is well known that there exists unfrozen film water in frozen soils due to the action of sur-face energy among soil particles and frost heave occurs by water migration under the tempera-ture gradient. The problem is how to determine the amount of frost heave quantitatively. The amount of frost heave induced by ice segregation can be calculated by the following e-quations:

关键词： temperature gradient film water frost heave.

A PRELIMINARY STUDY OF SNOW MASS VARIATIONS IN CHINA OVER THE PAST 30 YEARS

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Acta meteorologica Sinica 1992年第2期6卷 231-237页

作者：李培基 lanzhou {1. of glaciology and geocryology Academia SinicaLanzhou 730000

Daily snow data for 2300 climate stations covering the period from 1.51.through 1.80 have been used to monitor and diagnose secular variations,year-to-year fluctuations,and the spatial characteristics of snow variation trends in *** examination of time series reveals that there is a strong teleconnction to ENSO,to major volcanic eruptions, as well as to the CO_2-induced *** country-wide snow mass variations are positively correlated with global mean temperature,increasing during the current warming period and decreasing during the recent cooling period prior to the mid 1.60s.A synchronous relationship exists between El Nino/Southern Oscillation and snowy winter in China. The year-to-year snow fluctuations seem to be generally out of phase with volcanic *** anomaly map shows that snow mass increased in high altitudes and moist regions,while it decreased in arid lowland and the southern bounda- ry zone during the warming *** potential CO_2-induced changes in snow mass will further aggravate the regional differentiation between high mountains and lowlands,between moist and arid *** number of snow cover days will decrease in the northern lowlands,and snowfall will increase in the Qinghai-Xizang Plateau,high mountains,and the lower reaches of the Changjiang(Yangtze)River.

关键词： snow mass variation spatial characteritics of snow variation trends CO_2-induced warming ENSO

FLUCTUATIONS AND FUTURE TREND OF CLIMATE, GLACIERS AND DISCHARGE OF ■R■MQI RIVER IN XINJIANG

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Science China Chemistry 1990年第4期33卷 504-512页

作者：姚檀栋施雅风 lanzhou {1. of glaciology and geocryology Academia Sinica Lanzhou 730000 PRC

Based on the analyses of various data available of the rümqi River, Xinjiang, it is found that the warming trend of the climate in recent years is mainly accompanied by the decrease in precipitation, discharge, and glacial mass balance. Since the Little Ice Age, the temperature has increased by 0.5—1.0℃, while the precipitation, glacial volume and annual discharge have decreased by 50 mm, 41. and 1.%, respectively. It is possible that the trend would last for the next 1.—1. years.

关键词： climate glacier river discharge future trend.

SEASONAL SNOW RESOURCES AND THEIR RECENT SECULAR VARIATIONS IN CHINA

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Chinese Science Bulletin 1988年第21期33卷 1808-1812页

作者：李培基 lanzhou {1. of glaciology geocryology Academia Sinica

Ⅰ. INTRODUCTION Snow resources are a very important fresh water supply in China. Runoff from mountain snow feeds many of the major Chinese rivers and provides water for irrigation in arid regions. The north and west ... 详细信息

关键词： snow resources geographical and seasonal distributions year to year fluctuation climatic change

FABRICS OF THE ICE CORES FROM BHQ ON LAW DOME ICE CAP, ANTARCTICA

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Chinese Science Bulletin 1988年第3期33卷 216-220页

作者：李军谢自楚黄茂桓 lanzhou {1. of glaciology and geocryology Academia Sinica

Ⅰ. INTRODUCTION Investigation of Antarctic glaciers by Chinese researchers began in 1.82 at Law Dome Ice Cap in the north of Wilks Land, Eastern Antarctica. In this ice cap, the entire sequence of glacier zones has b... 详细信息

关键词： glacier ablation Eastern melting fabric north gentle margin borehole regularly

Oxygen-1. in present-day precipitation on the Tibetan Plateau

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Science China(Technological Sciences) 2001年第S1期44卷 41-47页

作者：章新平姚檀栋中尾正义 1. Nanjing institute of Geography and Limnology Chinese Academy of Science 210008 Nanjing China2. Institute of Territory and Environment Research Hunan Normal University 410081 Changsha China3. Lanzhou Institute of Glaciology and Geocryology Chinese Academy of Science 730000 Lanzhou China4. Institute for Hydrospheric-Atmospheric Sciences Nagoya University 464-8601 Nagoya Japan

The temporal and spatial variations of the δ1.O in precipitation on the Tibetan Plateau are analyzed. There is no temperature effect in the southern Tibetan Plateau. Amount effect has been observed at Lhasa station. However, the seasonal variations of the δ1.O in precipitation are different from that of precipitation intensity, showing that the precipitation intensity is not a main controlling factor on the stable isotopic compositions in precipitation in the southern Tibetan Plateau. There is notable temperature effect in the middle and northern Tibetan Plateau. The seasonal variations of the δ1.O in precipitation are almost consistent with those of air temperature there, indicating that temperature is a main factor controlling the stable isotopic variations in precipitation. A meridional cross-section shows that a notable depletion of the stable isotopic ratio in precipitation takes place in the Himalayas due to very strong rainout of vapor as it rises over the Himalayas, then the δ1.O remains basically unchanged although a big temperature fluctuation appears from Tingri to Amdo, and the δ1.O in precipitation increases rather than decreases from Tanggula to the northern Tibetan Plateau. Such a spatial distribution is related to the replenishment of vapor with the relatively heavy stable isotopic compositions originated from the inner Plateau.

关键词： δ1.O temperature effect amount effect the Tibetan Plateau.