Temperature variations on the Tibetan Plateau over the last two millennia

The paleoclimate data recovered from ice cores,tree rings and lake sediments indicate regional features of cfimatic change on the Tibeta n Plateau (TP) during the last 2000 years. The composite temperature reconstructions in-dicate that several main climatic episodes, such as the “LittleIce Age“ between 1400 and 1900, the “Medieval Warm Pe-riod“ in 1150-1400, a less warm period in 800-1100, and an earlier cold period between the 3rd and 5th centuries,occurred in the TP. In addition, temperature varied from region to region. The period from AD 800 to 1100, which waswarm in northeastern TP, was contemporaneous with cool-ing in the western and southern TP. The southern TP ex-perienced warming between 1150 and 1400. For western TP,the δ^18O records of the Guliya ice core indicate that the pe-Hod 1250-1500 witnessed a clear warming. Large-scaletrends in the temperature history from northeastern TP aremore similar to those in eastern China than are the trendsfrom the Guliya ice cap far to the west and southern TP. The most prominent similarities between the temperature varia-tions of the TP and eastern China are such cold phases as 1100-1150, 1500-1550, 1650-1700 and 1800-1850, andthe latter three cold events match with three widespreadg lacial advances which occurred on the TP during the Little Ice A2e.     

藏族碉楼与园林

西藏的传统建筑历史源远流长，从当代考古科学成果提供的资料看，可以追溯到距今4500年左右的新石器时期，当时已经有了较为发达的半地穴平顶建筑。无论怎样看待，我们从今天的西藏高原上所能见到的建筑，如帐篷、洞窟、碉楼，一直到民居建筑，寺院建筑，宫廷建筑，     

科技事件

西藏研究气候变化对高原湖泊的影响西藏科研人员将对高原典型湖泊进行研究,以得出近几十年来气候变化对西藏高原湖泊生态环境的影响,以及未来湖区环境变化趋势。目前,这一科研项目已获国家自然科学基金立项。据介绍,这一项目的执行年限为2008年1月至2010年12月。     

Relationship between the atmospheric heat source over Tibetan Plateau and the heat source and general circulation over East Asia

On the basis of NCEP/NCAR version I daily reanalysis data from 1971 to 2000 and by the methods of inverse calculation, correlation analysis and comparative analysis, the influences of atmospheric heat source （AHS） over the Tibetan Plateau on the large-scale AHS and the general circulation in summer are studied in this paper. The results show that AHS over the plateau in summer may trigger a heat source wavetrain propagating northeastward along the coast from the East Asian continent and West Pacific to Bering Strait-Arctic or even North America. In addition, if AHS over the eastern plateau is intense, South Asian High moves to southeast and West Pacific subtropical high moves to southwest; on the contrary, if AHS over the eastern plateau is weak, South Asian High moves to northwest and West Pacific subtropical high moves to northeast. Therefore, South Asian High and West Pacific subtropical high move in the horizontally-opposite directions in terms of interannual variation, for which AHS over the eastern plateau seems to be thermodynamically responsible.     

植物的奇妙生活

无论是在潮湿的森林里，荒凉的沙漠上，辽阔的草原上，还是在有“世界屋脊”之称的西藏高原上。到处都有植物。如果没有植物就不会有动物。那么，这些植物是怎样吸收养分、怎样生长的呢？它们赖以生存的本领是什幺呢？让我们一起来领略一些奇特植物的独特生活方式吧。     

青藏高原日土地区构造单元划分,特征及演化

西藏高原的构造单元及深断裂基本上汇聚在日土地区,是揭开青藏高原成因奥秘关键之地。笔者将该地区划分为6个亚一级和若干次级构造单元:昆仑海西、冈底斯早燕山两褶皱系和巴颜喀拉印支褶皱带具典型地槽性质,喀喇昆仑晚海西、喜马拉雅晚燕山两褶皱系和羌塘地块趋于准地台性质。各单元由活动转稳定过程、深断裂形成与封闭、岩浆活动等均具北老南新逐渐阶段性迁移特征;岩石圈固结有自北而南逐渐推移扩大趋势。巨大蛇绿岩带显示新生地槽的发展演化。     

Ozone mini-hole occurring over the Tibetan Plateau in December 2003

Since the Antarctic ozone-hole was discovered[1], the ozone depletion in stratosphere and its effect on climate and environment have become the global focus[2-6]. In China, since Zhou et al.[7] in 1994 and later Zou[8] dis- covered the total ozone valley …     

我校3项目获西藏自治区科技厅立项资助

最近，我校3项目获西藏自治区科技厅立项资助，分别为是理学院诺桑副教授的“西藏高原两点有效太阳紫外线的测量”；理学院孟宪茹教授的“建筑太阳集热构件研制”；医学院刘忠副教授的“七味罗堆多吉颗粒剂的临床前研究”。