当阳复向斜上组合生烃潜力及其含油气系统

当阳复向斜上组合存在志留系、二叠系及下三叠统三套烃源层，以碳酸盐岩及泥质岩为主。以志留系底部厚约５０ｍ的黑色页岩生油条件最好，在王家湾剖面有机碳含量平均达３．７７％；次为二叠系碳酸盐岩，全区有机碳平均含量为０．３６％。干酪根碳同位素特征和扫描电特征均显示该区烃源岩母质类型主要为Ⅰ型和Ⅱ型。有机质热演化程度普遍较高，应以天然气勘探为主。利用“二维源岩评价系统”软件进行了盆地模拟，三套烃源层的累积生烃     

ON ICE FORMING NUCLEI

Cloud condensation nuclei(CCN)constitute a reservoir of latent ice-forming nuclei(IFN)active by condensation-followed-by-freezing and by sorption.Two classes of aerosol particles active as IFN by sorption werefound.The first produces IFN concentrations which are dependent on temperature only.The IFN concen-tration consecutively increases with lowering of temperature and does not respond to the increasing partialwater vapor pressure.The second produces IFN concentrations which are dependent on partial water vaporpressure only,The IFN concentration consecutively decreases with decreasing of the partial water vapor pres-sure that takes place with the lowering temperature.Sulfates(mostly ammonium sulfate)constitute an integral part of IFN active by condensation-followed-by-freezing and by sorption.Backward isentropic air parcel trajectories linked polluted air rich in sulfates andclean air with high and low concentrations of IFN active by condensation-followed-by-freezing at-19.7℃ andS_w=0.1%.The experiments were performed in a dynamic filter processing chamber with aerosol particles collectedon membrane filters.     

Investigation on Settling Characteristics of Floes in the Changjiang Estuary, China

- Settling characteristics of floes, including relative settling velocity, relative flocculation coefficient and flocculation exponent, are obtained by the suspended load equations for different size fractions. Data of the Changjiang Estuary suggest that level of flocculation changes from river section, river mouth (turbidity maximum) to offshore area in sequence of low, very high and high. The settling characteristics of floes reflected by in situ estimation performs a similar feature as that obtained from still water experiment.     

东亚夏季风的自然变率——NCAR Cam3模拟结果分析

利用季节循环的全球观测海表温度及海冰驱动NCAR Cam3全球大气环流模式的100a模拟结果,通过定义东亚夏季风指数,分析了模拟的大气内部变化中东亚夏季风的变化特征。结果表明:模拟的东亚夏季风自然变率主要表现为3~7a较显著的年际周期,并具有较明显的年代际变化特征。在弱夏季风年代,亚洲大陆海平面气压增强,日本附近及东亚沿海地区海平面气压降低;500hPa位势高度上,欧洲地区为负高度距平,里海附近地区为正高度距平,日本及其以东太平洋为负高度距平,易形成类似欧亚(EU)型的遥相关波列。在强夏季风年代,其环流异常分布基本与弱夏季风年代相反。模拟的东亚夏季风变化与夏季大气内部500hPa高度场上EU型遥相关波列的关系密切。     

Application of Generalized Moist Potential Vorticity to the Analysis of a Torrential Rain Case

Considering the non-uniform saturation of the real atmosphere,a diagnostic study of a torrential rain event is performed from the perspective of the anomaly of the generalized moist potential vorticity(GMPV) after introducing the generalized potential temperature into the thermodynamic frame of the real atmosphere. The results show that the anomaly appeared at mid-lower levels of the troposphere when the torrential rain happened.Analysis of the magnitudes and locations of maximum values of the tendency o...     

广州夏季雨水硝酸盐δ15N变化特征

通过对广州2007年夏季雨水硝酸盐δ15的研究,讨论了广州地区雨水硝酸盐的主要来源及与之有关的大气化学演变过程。雨水硝酸盐占δ15N的变化趋势与N2O5含量的相似。暗示雨水硝酸盐δ15N与氮氧化合物的大气化学过程之间存在某种联系。白天雨水硝酸盐δ15N值偏低,与OH自由基氧化NOx生成硝酸盐的“白天反应”为主要反应相一致;18：00以后硝酸盐δ15N值呈升高趋势,则与N2O5累积的“夜间反应”成为主导反应相一致。因“白天反应”生成的HNO3的δ15N值受同位素分馏影响较小,白天雨水硝酸盐占δ15N值更能准确反映大气NOx的来源。白天雨水硝酸盐占δ15N平均值为2．5‰±2．1‰,表明除火力发电厂和机动车尾气排放来源外,雷电以及海源对大气NOx可能也有潜在贡献。     

Erratum to: Estimation of the 2001 Kunlun earth-quake fault slip from GPS coseismic data using Hori’s inverse method

An error was introduced in title of section 3 of our paper. The correct title is "Estimation of slip distribu-tion". The online version of the original article can be found at http://dx.doi.org/10.1007/s11589-009-0609-x.     

新丰江水库1961~1999年小震综合机制解结果分析

采用新丰江水库地区自1961年下半年到1999年底近40年的大量小震，分时段、分块计算小震综合机制解. 运用莫尔应力圆讨论分析水压应力场的作用特点. 小震综合机制统计结果表明，地震的破裂方式由6.1级主震前的走滑型为主转变为主震后的正断型破裂为主；主压应力P轴的方位和倾角随水库水位的不同表现有所差别.      

崇明与南京台震前地电场变化异常分析

2001年11月3日和12月25日江苏南通地区分别发生了ML3.8和ML4.1的地震群事件. 本文以上海崇明地电场台和南京地电场台ZD9A大地电场仪的观测资料为研究对象，在阐述了多极距地电场观测去噪音原理的基础上, 研究了这两个台站地电场多极距观测系统的资料在震前的异常变化特征. 结果表明: ① 多极距观测去噪音方法是一种很好的识别地电场噪音的方法；② 在震前20天、2天及42天离震中较近的崇明台NS和NE方向上分别接收到了地震电信号, 其持续时间最长的为9天，而较远的南京台出现的异常信号都是噪音信号而非地震电信号；③ 地电场多极距观测系统中公用电极的布极方式是不可取的.