株洲盆地与西峡盆地产恐龙化石地层对比研究

株洲盆地与西峡盆地在晚白垩纪时期同属一个大的山间盆地,本文通过岩相古地理与古生物地层对比,发现两者的上白垩统地层戴家坪组和马家村组具有相似的岩相古地理背景和古生物组合,包括鸭嘴龙类和蜥脚类恐龙骨骼化石及恐龙蛋化石,轮藻化石Charites,Eucypris-Ilyocypris-Talicypridea介形类化石组合以及以蕨类植物孢子Schizaeoisporites占大多数的孢粉组合,这些化石均为晚白垩世代表分子。     

从大布局着笔用真阳光解题——征地拆迁“株洲模式”解读

2001年到2003年,是株洲市城市发展突飞猛进、城市面貌日新月异的三年.轨道交通、汽车、航空、服饰等重大产业集群项目不断发展壮大,神农城、跨江大桥、湘江风光带、长株潭城铁等一大批基础设施项目及民生工程项目都让老百姓真真切切的享受着城市发展的成果.这三年,也是株洲征地拆迁极为艰难的三年.一来新政策出台实施,需要磨合并保持平稳过渡;二来征地拆迁量从过去的每年几千亩发展到现在的每年近2万亩,任务十分繁重;三来制约征地拆迁的因素越来越多,阻力越来越大.征拆形势的严峻确实导致全市征地拆迁工作出现过一段时间的举步维艰,但从三年的整体时效来看,全市征拆交地量反而年年递增,交地面积从2010年的6162亩,增长到201 1年的8319亩,再递增到今年的12424亩,稳固保障城市发展用地.在如此艰难的形势下,为何还能在两年内实现了交地量翻番?     

EXPERIMENTAL STUDIES WITH AN OPERATIONAL NUMERICAL MODEL FOR PREDICTION OF TYPHOON TRACKS OVER THE SOUTH CHINA SEA REGION

Experiments for short range forecasting of typhoon tracks over the South China Sea Region were carried out using limited-area numerical model recently developed by the authors.Due to the shortage of sounding data over the sea, typhoon circulations are usually obtained incompletely from objective analysis, or with significant deviation of the centre from reality.Therefore a set of schemes for typhoon initialization are proposed here to construct a bogus typhoon with the circulation being consistent with the physical processes included in the limited-area model.Based on the schemes bogus data over the model grids are created and analysed together with conventional observational data.Then the normal model initialization scheme is issued to further modulate the model typhoon with the numeriCal modeel.Some experiments of sensitivity in various aspects are conducted for further improvement of typhoon track predictions.The experimental results for a number of typhoon landing in southern China in 1993 and 1994 shows that the limited-area model is capable of predicting typhoon tracks in the southern China region.     

青藏高原化雪迟早的辐射效应对季节变化的影响

利用大气物理所九层菱形截断１５波大气环流谱模式进行数值试验，研究青藏高原化雪迟早之辐射效应对季节变化的影响。共进行了正常态（ＣＯＮ），化雪迟（ＭＳＮ），化雪早（ＬＳＮ）三个试验。高原第ｉ月积雪状况在ＣＯＮ中取ｉ月气候平均值，在ＭＳＮ中取（ｉ—１）月的气候平均状况，在ＬＳＮ中则取（ｉ＋ｌ）月的气候状况。每个试验都从１月１日气候平均状况出发，积分至１０月。通过比较各试验结果分析化雪迟早的气候效应。结果表明，高原化雪的迟早改变了进入地表的辐射通量，从而改变了地表对大气的加热，由此影响东亚地区的季节变化。化雪迟则高原上春季进入地表的辐射通量减少，导致地表的潜热通量和向外长波辐射减弱。尤其是感热通量的减弱更为严重。一般情况下，高原在冬季为大气的感热汇，３月下旬变为大气的感热源。多雪时，这一变化推迟了近１个月。与之相应，２００ｈＰａ高原上空的南亚高压建立迟，印度西南季风爆发也迟。造成夏季风降水在印度偏少，在中印度半岛和广东沿海偏多。