龙门山中北段重磁场特征与深部构造的关系

利用平均重力场与深部地壳测深资料估算了龙门山及邻区莫霍面的深度变化,表明龙门山地区正处于莫霍面由东南向西北的陡降带上。均衡重力异常计算结果显示该区为正异常。对航磁异常的向上延拓反映出茂汶杂岩体是“无根”的。此外还应用角度平均径向能谱法反演了该区深部磁性基岩的顶面与底面深度。结果表明,龙门山地区上地壳是由若干块体拼合而成的,川西拗陷带内的磁性界面呈现出向龙门山地腹下插的格局。     

长江中下游地区汛期降水量异常与旱涝趋势

在（25°～35°N．100°～125°E）范围内利用48个测站1950～1991年降水资料和1470～1974年旱涝等级资料对长江中下游地区汛期（6～8）月降水异常和旱涝趋势进行了统计分析和推断,得出：长江中下游地区汛期降水量一般在450～600mm．相对变率为0.25～0．40．历年降水量最大值出现在武汉地区、浙皖赣交界地区以及苏北兴化─东台地区、最小值出现在安徽合肥─霍山地区,20a、30a、50a─遇的异常多降水量的最大值出现在武汉、衢县及兴化─东台地区,异常少降水量的最小值出现在大别山及长江三角洲地区．大范围旱涝连续出现和交替出现的可能性很小,在长江中游地区汛期旱涝具有50a和20a的周期变化,长江下游地区具有100a和20a的周期变化,本世纪80年代以来长江下游地区降水量波动增加．预计下世纪10～30年代将是洪涝多发期．10～20年代长江中游地区将是干旱多发期．     

亚硫酸氢钠对泥鳅红细胞微核和核变形的诱导

以亚硫酸氢钠作为诱变剂，研究其不同浓度和染毒时间对泥鳅红细胞的损伤，结果发现：亚硫酸氢钠对泥鳅红细胞的损伤主要表现为微核率、核变形率和双核细胞率增高，细胞正常的分裂被干扰．在一定范围内，随着亚硫酸氢钠浓度的加大和染毒时间的延长，微核及核变形率增高，达到最高值后，反而开始随着浓度的继续加大，处理时间的继续延长，开始下降．诱发的微核率与核变形率和对照相比达到显著或极显著差异水平．此外，还探讨了微核的形成途径和亚硫酸氨钠对泥鳅红细胞染色体损伤的机理．     

蛟河舒兰井水温异常特征及映震分析

本文从吉林蛟河井与舒兰井井点位置和地震地质环境分析入手，对二处观测点资料异常可靠性进行评价。通过科学方法排除干扰，得出了基本的异常形态。对今后的观测水平提高和临震异常的扑捉有重要意义。     

卫星时代中国似大地水准面及其确定策略

提出了用垃小二乘谱组合与最小二乘配置相结合研究中国似大地水准面的方法，给出了用多种数据确定中国似大地水准面的策略，推导出了完整的计算公式，可以应用于大地测量等学科及卫星技术（如ＧＰＳ、卫星测高）。     

Revisit the K-segment of the Southeast Indian Ridge for new evidence of hydrothermal plumes

During the first leg of a Chinese research cruise to the Southeast Indian Ridge (SEIR) in 2007, we revisited the K-segment of the SEIR and observed a water column turbidity anomaly at a CTD cast station. This station was located ~400 m from a dredge site on a plume anomaly detected in 1996 by US scientists. The characteristics of the turbidity anomaly detected in our survey are different from those observed 11 years previously, implying that either the detected anomalies have distinct and different plume sources or the robustness of the plume has changed in the intervening time. In addition, turbidity anomalies were observed at two localities on the K-segment in a deep tow-yo profile. If these two anomalies are not connected, the plume incidence calculated would be about 0.28, larger than the predicted value of 0.25 for a 65 mm/a spreading rate. This increase in plume incidence on the K-segment seems to be related to the influence of the St. Paul-Amsterdam hotspot, located about 300 km to the northwest.     

The persistent anomaly of summertime circulation over the Ural Mountains

The tropical heating and transient activity features during the period of the persistent anomaly of summertime circulation over the Ural Mountains are studied, and a possible mechanism responsible for formation and maintenance of persistent anomalies is proposed. The mechanism can be summarized as a kind of self-sustaining through a two-way interaction of stationary wave with transient eddies under the consistent forcing of abnormal heating in the tropics.     

行为金融学和投资者信念模型

近几年,大量文献发现的证券市场异常现象(anomalies)严重地挑战了有效市场假说。建立了一个投资者信念模型,认为投资者的信念是在不完美信息下对公司级和市场级两个层面的分析之后形成的。提出模型不仅假设更合理,还以简约和统一的方式同时解释了多个已发现的异常,如反应过度和反应不足、小市值公司或高成长性公司效应,并给出了计算机仿真。还提出了两个有待验证的异常现象。     

The leading correlation of the winter Aleutian Low with surface air temperature during the subsequent summer over the Arctic and its possible mechanism

The variations of surface air temperature(SAT)over the Arctic are closely related to global climate change.Based on reanalysis datasets and a newly defined Aleutian Low intensity index,we found a good correlation between intensity of winter Aleutian Low and the SAT over the Arctic during the subsequent summer.Explanations were given using correlation analysis,composite analysis,and singular value decomposition methods.When intensity of winter Aleutian Low was weaker,sea surface temperature appeared higher in the North Pacific in the subsequent spring and summer,resulting in mean meridional circulation anomalies and 500 hPa geopotential height anomalies in spring and summer.Anomalous upward motion in mid-latitudes and downward motion in high latitudes(Ferrel cell weakening)transported the warmer air to the north from lower layer to the upper layer followed by increases in the SAT over the Arctic.Anomalous downward motion over about 75°N also caused consequent adiabatic warming and contributed to inhibit the heat transportation from surface to upper layer.Negative 500 hPa geopotential height anomalies existed in mid-latitudes and positive anomalies existed in high latitudes.The pattern(low-in-south and high-in-north)benefited from increasing the inflow volume flux of the Bering Strait,which also made the SAT over the Arctic increase.The results of this study reveal the process that the summer SAT over the Arctic was modulated by interannual variability of intensity of winter Aleutian Low.