Holocene lake deposits of Bosten Lake, southern Xinjiang, China

A 9.25-m-long sediment core from Bosten Lake,Xinjiang, provides detailed information about changes in the water budget and biological acticity over the last 8400 cal-endar years. The chronology is constructed from six AMS radiocarbon dates on the terrestrial plant remains. Based onanalyses of TOC, CO3, detrital compounds and biogenic SiO2,lake level fluctuations and periods of remarkably-negative water budget appeared at 8.4-8.2 cal ka, 7.38-7.25 cal ka,5.7-5.5 cal ka, 3.7-3.4 cal ka and 3.3-2.9 cal ka, respec-tively. As they are in-phase with low lake levels at Sumxl Co and Bangong Co in western Tibet Plateau and with paleo-lakes in Inner Mongolia, a climate-induced change to some-what drier and warmer conditions is inferred. A further drop in lake level after 1320 AD of about 200 yr duration may heattributed to a negative water balance prior to the main phase of the Little Ice Age. Deep and stable lake phases of 1500 yr and 1800 yr duration at 7.2-5.7 cal ka and 5.5-3.7cal ka coincide with maximum moisture during the Holocene Megathermai in China. The long term trend towards aridity since about 4.3 cal ka can dearly be recognised. The reduced water budget of Bosten Lake from 640-1200 AD may be attributed to local effects.     

A carbon- and oxygen-isotope record of recent environ- mental change from Qinghai Lake, NE Tibetan Plateau

An understanding of natural climatic variability is essential for evaluating anthropogenic impacts on recent and future climate[1—3]. Due to the lack of lengthy instrumental records, such an understanding must be gained from natural archives of climate change. Palaeolimnological indicators of past lake levels may provide a sensitive record of changes in effective precipitation in closed basins. This approach is particularly relevant on the Tibetan Plateau, where instrumental records are very…     

Evolution of the South China Sea and monsoon history revealed in deep-sea records

As the third summary report of ODP Leg 184 to the South China Sea (SCS), this paper discusses the evolution of the East Asian monsoon and the SCS basin. A multi-proxy approach, involving geochemistry, micropale-ontology, pollen and other analyses, was adopted for reconstructing the evolutionary history of the East Asian monsoon, which was characterized by a series of paleo-climate events especially at 8, 3.2, 2.2 and 0.4 Ma. The new record indicates similar stages in the development of the East and South Asian monsoons, with an enhanced winter monsoon over East Asia being the major difference. The rich spectrums of monsoon variability from the southern SCS also reveal other characteristic features of the low latitude ocean. Evidence for the evolution of the SCS includes the hemipelagic Oligocene sediments, implying the existence of deep water environments during the early seafloor spreading stage of the SCS basin. The four major unconformities and some remarkabl ediagenetic features in upper Oligocene deposits indicate the strongest tectonic events in the region. From a careful comparison of lithologies and sedimentation rates, we conclude that the prominent differences in sedimentary environments between the southern and northern SCS were established only by ～3 Ma.     

浅谈太原市“文瀛湖”的历史文化及发展规划

太原市“文瀛湖”有着丰富的历史文化和优美的自然景观和人文景观。文章通过对公园历史文化和现状的：分析，从公园的性质、规划原则、功能区别、主要景点、布局特点、绿化配置等诸方面对文瀛湖公园的总体规划进行了介绍。     

东海中华管鞭虾的数量分布和生物学特性

对东海中华管鞭虾的数量分布及其主要生物学特性进行了研究，结果表明：调查区该种的年平均渔获率为524g／h，以春季较高(839g／h)，秋季次之，冬季最低。其分布海域主要在20～60m水深，即在沿岸低盐水和外海高盐水交汇的混合海区，适温范围10～25℃。适盐范围30～34。繁殖期6～10月，盛期8～10月，9月至翌年1月相继出现30～40mm的小虾，并逐月长大加入捕捞群体，成为翌年新的捕捞对象。为合理利用该资源，建议12月至翌年2月，在小虾出现高峰期时，加强保护措施，增加补充群体的资源数量，提高经济效益。     

洞庭湖湿地虉草资源的开发利用

通过对洞庭湖湿地虉草(Phalaris arundinacea L)资源的调查，该地虉草资源丰富、分布广泛、蕴藏量大；同时对虉草进行了品质分析和鲜草饲喂试验，其结果表明，该资源营养丰富，鲜草饲喂黄牛、奶牛及羊喜食或食用，为综合开发利用虉草资源提供了重要资料。     

湖泊原生碳酸盐化学沉积模型及其应用

对湖泊原生碳酸盐化学沉积体系的模型化作了初步的尝试，并把经与对胜利油区早第三纪的古老营湖的研究相结合，定量化地探讨了古东营湖中的由气候的旋回性变化所控制的富碳酸盐／富碎屑物的韵律沉积现象。     

青藏高原冬季积雪异常对东、南亚夏季风影响的初步数值模拟研究

利用一个耦合了简化的简单生物圈模式的大气环流谱模式（ＳＳｉＢ－ＧＣＭ），初步探讨了青藏高原冬季积雪异常对东、南亚夏季风环流和降水的影响及其机理。结果表明，高原地区冬季积雪增加将使随后的夏季东、南亚季风明显减弱，主要表现为东、南亚季风区降水减少，索马里急流、印度季风槽和印度西南气流减弱。另外，还提出欧亚大陆雪盖与整个高原雪盖和高原东部雪盖对东、南亚夏季风影响的敏感性问题。与欧亚大陆雪盖相比，高原雪盖是影响东、南亚季风的更敏感区，冬季高原以外雪盖增加，有可能使亚洲季风增强；当高原东部雪盖增加时，高原以东地区及印支半岛降水减少，印度东部、南部和孟加拉湾西北部降水反而增加     

东海北部拖虾渔业的现状与设立拖虾休渔期的建议

本文根据近１０年来拖虾调查和虾类资源动态监测资料，分析了拖虾渔业发展的现状和存在问题，并根据虾类资源种类多，分布区域性明显，主要种类的渔场渔期不同，繁殖期、幼虾的时空分布不同等特点，提出设立拖虾休渔期的建议方案。