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| 1 | Westerly moisture transport to the middle of Himalayas revealed from the high deuterium excess显示文摘Previous studies found extremely high d-excess in both ice core and glacial melt water in Dasuopu glacier, Xixiabangma, middle of Himalayas. These values are much higher than the global average and those measured in southwest monsoon precipitation. The d-excess variation in over one year at Nyalam station will clarify this phenomenon. Studies show that the high d-excess is related to the seasonal variation of moisture transport to this region. The d-excess values are low during the southwest monsoon active periods, when moisture originated from the humid ocean surface. The d-excess values are higher in non-monsoon months, when moisture is derived from westerly transport. Winter and spring precipitation accounts for a substantial portion of the annual precipitation, resulting in higher d-excess in the yearly precipitation in the middle of Himalayas than other parts of the southern Tibetan Plateau. This finding reveals that the precipitation in the middle of Himalayas is not purely from southwest monsoon, but a large portion from the westerly transport, which is very important for ice core study in this area. | TIANLide YAOTandong J.W.C.White YUWusheng WANGNinglian | 2005 | Chinese Science Bulletin2005，50，10： | 21 |
| 2 | Microparticle record in the Guliya ice core and its comparison with polar records since the last interglacial显示文摘Based on the study of oxygen isotope and mi-croparticle in the Guliya ice core, atmospheric dust and en-vironmental changes in the northwest Tibetan Plateau since the last interglacial were revealed. The microparticle record indicates that low dust load on the Plateau in the interglacial. Particle concentration increased rapidly when the climate turned into the last glacial and reached the maximum during the MIS 4. In the Last Glacial Maximum, however, the en-hancement of microparticle concentration was slight, differ-ing to those in the Antarctic and Greenland. On the orbital timescale, both the temperature on the Tibetan Plateau and summer solar insolation in the Northern Hemisphere had their impact on the microparticle record, but the difference in phase and amplitude also existed. Though having the same dust source, microparticle records in the ice cores on the Tibetan Plateau and the Greenland seem to have different significance. | WUGuangjian YAOTandong L.G.Thompson LIZhongqin | 2004 | Chinese Science Bulletin2004，49，6： | 12 |
| 3 | Relationship between calcium and atmospheric dust recorded in Guliya ice core显示文摘By the analyses of Guliya ice core on the Ti-betan Plateau, it was found that the calcium (Ca2+) origi-nated from the terrestrial source is the main cation of soluble aerosol and a good proxy of the atmospheric component and environment in the mountain ice core located in the mid-low latitude arid regions. Evident variation of Ca2+ concentration has been found in the Guliya ice core since the Last Intergla-ciation with two relatively strong increase periods and two weak increase periods. These variations are generally related to climatic changes: high Ca2+ concentration periods coincide with cold periods and low Ca2+ concentration periods coin-cide with warm periods. However, Ca2+ concentration does not always decrease (increase) with climate warming (cool-ing). The magnitude and phase of Ca2+ concentration does not always match temperature either. The changes of at-mospheric circulation, land surface condition and atmos-pheric humidity might be important factors which influence Ca2+ concentration besides temperature. | YAOTandong WUGuangjiant PUJianchen JIAOKeqin HUANGCuilan | 2004 | Chinese Science Bulletin2004，49，7： | 11 |
| 4 | Change of bacterialcommunity in the Malan Ice Core and its relation toclimate and environment显示文摘In order to understand the relationship be- tween the community structure of bacteria in ice core and the past climate and environment, we initiated the study on the microorganisms in the three selected ice samples from the Malan ice core drilled from the Tibetan Plateau. The 16S ribosomal DNA (rDNA) molecules were directly amplified from the melt water samples, and three 16S rDNA clone li- braries were established. Among 94 positive clones, eleven clones with unique restriction pattern were used for partial sequence and compared with eight reported sequences from the same ice core. The phylotypes were divided into 5 groups: alpha, beta, gamma proteobacteria; CFB, and other eubac- teria group. Among them, there were many “typical Malan glacial bacteria” pertaining to psychrophilies and new bacte- ria found in the ice core. At a longer time scale, the concen- tration distribution of “typical Malan glacial bacteria” with depth showed negative correlation with temperature varia- tions and was coincident with dirty layer. It implied the in- fluence of temperature on the microbial record through im- pact on the concentrations of the “typical Malan glacial bac- teria”. In addition, the nutrition contained in ice was another important factor controlling the distribution of microbial population in ice core section. Moreover, the result displayed an apparent layer distribution of bacterial community in the ice core section, which reflected the microbial response to the past climatic and environmental conditions at the time of deposition. | XIANGShurong YAOTandong ANLizhe LIZhen WUGuangjiad WANGYouqing XUBaiqing WANGJunxia | 2004 | Chinese Science Bulletin2004，49，17： | 10 |
| 5 | Oxygen-18 in different waters in Urumqi River Basin显示文摘The variations of the stable oxygen isotope in different water mediums in Urumqi River Basin, China, are analyzed. The stable oxygen isotope in precipitation has marked temperature effect either under synoptic or seasonal scale at the head of Urumqi River. The linear regression equations of δ^18O against temperature are δ^18O=-0.94T-12.38 and δ^18O=1.29T-13.05 under the two time scales, respectively. The relatively large δ^18O/temperature slopes show the strong sensitivity of δ^18O in precipitation to temperature variation at the head of Urumqi River. According to the analyses on the δ^18O in precipitation sampled at three stations with different altitudes along Urumqi River, altitude effect is notable in the drainage basin. The δ^18O/altitude gradients have distinct differences: the gradient from Urumqi to Yuejinqiao is merely -0.054‰/hm, but -0.192‰/hm from Yuejinqiao to Daxigou, almost increasing by 2.6 times over the former. No altitude effect is found in surface firn the east branch of Glacier No. 1 at the head of Urumqi River, showing that precipitation in the glacier is from the cloud cluster with the same condensation level. Influenced by strong ablation and evaporation, the δ^18O in surface firn increases with increasing altitude sometimes. Survey has found that the δ^18O in meltwater at the terminus of Glacier No. 1 and in stream water at Total Control have the similar change trend with the former all smaller than the latter, which displays the different runoff recharges, and all mirror the regime of temperature in the same term basicallv. | ZHANGXinping YAOTandong LIUJingmiao | 2003 | Journal of Geographical Sciences2003，13，4： | 4 |
| 6 | Climate re- cords in a firn core from an Alpine temperate glacier on Yulong- Mountain,southeastern part of the Tibetan Plateau显示文摘 | He Yuanqing YaoTandong Cheng Guodong | 2001 | Episodes2001，24，1： | 1 |
| 7 | Comparisons on seasonal and annual variations of δ^(18)O in precipitation显示文摘The spatial and temporal variations of stable oxygen isotope in precipitation on different time scales are analyzed according to the data from the IAEA/WMO stations with long survey series in the Northern Hemisphere. Temperature effect is mainly distributed in mid-high latitudes on seasonal scale except for Bamako and Addisababa stations. The δ 18 O/temperature slope displays the positive correlation against altitude for most of the statistical stations. Amount effect appears primarily in the region south of 30 o N and coastal areas. The δ 18 O/precipitation slope is indirectly proportional to precipitation amount. For some of the sampling stations at mid-high latitudes where their seasonal distribution of precipitation is contrary to that of temperature, coupled with temperature effect, the amount effect appears synchronistically. Either the temperature effect or the amount effect on seasonal scale, there are positive correlations to a certain extent between the annual weighted mean δ 18 O and the annual mean temperature for almost all the stations. The correlation between composite δ 18 O and temperature on spatial scale is much more marked, compared with that of individual station. There is a good agreement between 10-year moving average temperature curves I and II, with the values of the former all markedly smaller than corresponding ones of the latter, calculated by the monthly mean series group I and the annual mean series group II, respectively. However, two calculated d δ 18 O/d T curves display the distinct difference: the variation amplitude of slope series II is larger than that of slope series I. Both curves had similar ascending trend from the 1960s to the 1970s, and then, their variations display the anti-phase. Moreover, the analyses show that there is negative correlation between slope series II and temperature series II. However, the status is different for slope series I and temperature series I. Both series have contrary trend from the 1960s to the 1970s, whereas the same trend since the 1980s. | ZHANGXinping YAOTandong | 2004 | Journal of Geographical Sciences2004，14，2： | 1 |
| 8 | Formate and acetate records in the Muztagata ice core,Northwest Tibetan Plateau显示文摘Formate and acetate concentrations are meas- ured in a 22.56 m-depth ice core recovered in Mt. Muztagata Glacier, northwest Tibetan Plateau. The mean concentrations for formate and acetate in this ice core are 186.6±160.1 and 136.4±133.9 ng/g, respectively. Study shows that there is a positive correlation between formate and nitrate, suggesting both continental origins. However, no significant relationship has been found between formate and acetate, though they both have obvious periodical variations. Because Mt. Muz- tagata lies in the mid-latitude and is correlative to the nearby human activities, formate and acetate concentrations are higher than those in Greenland and Antarctica. During re- cent decades, the increase of formate concentration in the Muztagata ice core and formaldehyde production shows a close correlation. We preliminarily presume that the high formate concentration in the Muztagata ice core is concerned with the thriving of house decoration in which excess for- maldehyde was used. | WANGJunxia YAOTandong XUBaiqing WUGuangjian XIANGShurong | 2004 | Chinese Science Bulletin2004，49，15： | 0 |
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