Recent Progress of Aerosol Light-scattering Enhancement Factor Studies in China

Assessment of the radiative forcing of aerosols in models still lacks sufficient input data for aerosol hygroscopicity. The light scattering enhancement factor [ f(RH, λ)] is a crucial parameter for describing aerosol hygroscopic growth properties.In this paper, we provide a survey of f(RH, λ) studies in China for the past seven years, including instrument developments of humidified nephelometers, ambient f(RH, λ) measurements in China, f(RH, λ) parameterization schemes, and f(RH, λ)applications in aerosol measurements. Comparisons of different f(RH, λ) parameterizations are carried out to check their performance in China using field measurement datasets. We also summary the parameterization schemes for predicting f(RH, λ)with aerosol chemical compositions. The recently developed methods to observe other aerosol properties using f(RH, λ)measurements, such as calculating the aerosol hygroscopicity parameter, cloud condensation nuclei number concentration,aerosol liquid water content, and aerosol asymmetry factor, are introduced. Suggestions for further research on f(RH, λ) in China are given.     

黔西南地区遥感构造与金矿的关系及找矿预测

遥感图像显示黔西南地区有两个地层区——台地相区和槽盆相区。复合内生微细浸染型金矿均产于短轴背斜、穹窿和与之伴生的断裂内,因此遥感解译的正向环形构造和环形影像对找矿有重要意义。另外,区内金矿与遥感解译推测的隐伏断裂也有一定关系。基于上述认识,以ETM+和GeoEye数据为数据源生成融合图像,进行遥感构造解译和分析,圈定了金矿找矿预测区,为进一步开展贵州省矿产资源潜力评价和找矿工作提供了参考依据。     

GPS/GLONASS组合标准单点定位性能分析

利用广播星历及伪距进行单历元单点定位,通过精度比较分析,得出GPS定位精度优于GLONASS,组合系统优于单系统;同时给出了初步的定权方案。     

STUDY ON THE RELATIONSHIP BETWEEN THE DECADAL VARIATIONS OF ANNUALLY FIRST RAINY SEASON PRECIPITATION OF GUANGXI AND SEA SURFACE TEMPERATURE OF INDIAN OCEAN IN SOUTHERN HEMISPHERE

Decadal circulation differences between more and less rainfall periods in the annually first rainy season of Guangxi and their association with sea surface temperature (SST) of the austral Indian Ocean are investigated by using the NCEP/NCAR reanalysis data. The results are shown as follows. A pattern in which there is uniform change of the Guangxi precipitation shows a 20-year decadal oscillation and a 3-year interannual change. In contrast, a pattern of reversed-phase change between the north and the south of Guangxi has a 6-year interannual periodicity and quasi-biennial oscillation. In the period of more precipitation, the surface temperature in Eurasia is positively anomalous so as to lead to stronger low pressure systems on land and larger thermal contrast between land and ocean. Therefore, the air column is more unstable and ascending flows over Guangxi are intensified while the Hadley cell is weakened. Furthermore, the weaker western Pacific subtropical high and South Asia High, together with a stronger cross-equatorial flow, result in the transportation of more humidity and the appearance of more precipitation. The correlation analysis indicates that the Indian Ocean SST in Southern Hemisphere is closely associated with the variation of the seasonal precipitation of Guangxi on the decadal scale by influencing the Asian monsoon through the cross-equatorial flow.     

长沙市一周晴雨落区及等级滚动预报系统

预报系统在晴雨等级时空分布的基础上,自动调用显示传真图,用计算机识别欧洲风预报场中的槽线、切变线等影响因子,自动提取欧洲中心20:00、08:00高度、温度、地面气压和相对湿度数据资料,并结合区域自动气象站资料,挑选组合预报因子,建立预报模型,分别制作上午(20:00～20:00)和下午(08:00～08:00)一周晴雨落区及等级预报.并应用VB6.0语言编制成自动化的预报系统,在长沙公共气象信息服务系统2次/d滚动发布.业务运行一年,系统对降水落区及等级有较强预报能力.     

鲁东诸城地区晚白垩世恐龙集群埋藏地沉积相与埋藏学初步研究

鲁东诸城盆地白垩系由下向上包括林家庄组、辛格庄组和红土崖组。下白垩统林家庄组为杂色粗碎屑岩系;上白垩统辛格庄组为杂色细碎屑岩系,红土崖组为砖红色砂岩、砾岩互层沉积夹玄武岩(73.5Ma),为恐龙化石埋藏层位,并与区域上莱阳青岛龙及恐龙蛋化石等产出层位可以对比。诸城地区晚白垩世时期主要为冲洪积沉积环境,辛格庄组上部为洪泛平原粉砂岩—细砂岩—灰质土加积序列,局部夹扇中辫状河砾岩、粗砂岩,红土崖组下部与下伏辛格庄组顶部过渡部位是冲积扇泥石流、辫状河和洪泛平原粉砂泥质砾岩、砂岩加积沉积序列。识别出与冲积扇沉积体系相关的3种埋藏相类型:冲积扇泥石流、洪泛平原和辫状河河道(砂砾岩),前二者是研究区主要的埋藏相类型。所含化石主要为鸭嘴龙的残体骨骼,个体大小参差不等,互相间可叠盖一起,同时也有孤立发育的骨骼化石。高密度、单一种类恐龙残体骨骼化石的沉积、埋藏特征代表了恐龙集群埋藏—沉积事件。     

二连盆地努和廷铀矿床成矿作用及成矿模式

通过研究努和廷铀矿床地质特征、成矿作用及地球化学特征,认为努和廷矿床为同生沉积后生改造型铀矿床。晚白垩世二连期湖泊发育区控制了矿床定位。矿床成矿作用经历了同生沉积成矿、后生改造和表生作用3个阶段,成矿年龄为85Ma、（41±5）Ma和6～13Ma。在总结矿床成矿地质特征、成矿作用及地球化学特征基础上,建立了努和廷铀矿床成矿模式。     

一种求解分布式目标通道最优极化的快速算法

针对现有分布式目标通道最优极化算法存在运算量偏大等问题,以算法的实用性为目的,在理论分析的基础上提出一种求解分布式目标通道最优极化的快速算法.首先将任意通道下的天线接收功率模型统一为同极化通道下的天线接收功率拓展模型,然后对该拓展模型进行变换极化基处理,在此基础上理论确定目标最优极化在(r,θ)平面上的位置区间,从而为简化目标最优极化求解或预判目标最优极化位置等提供理论支撑.为获取目标最优极化,采用区间二分法在目标最优极化位置区间内迭代搜索.通过对比实验对算法运算速度和实现方面予以验证.

Abstract：

Aiming at the large mount of calculation of the traditional algorithms for polarimetric power optimization of random target in arbitrary channel, a fast algorithm is proposed in this article. Firstly, the function of received power in arbitrary channel is unified as the form of copolar power. Then based on the change of polarimetric basis,the copotar power is analyzed theoretically to obtain the minimum interval of target optimal polarization state in (r,θ)plane, which provides theoretic support for simplifying the process of obtaining optimal polarization states or anticipating their positions. In order to obtain optimal polarization states, the interval dichotomy is used to search in the minimum interval of target optimal polarization state, The experiment results have demonstrated that the proposed algorithm has better performance than the Lagrange multiplier method or the method of traversal search in algorithmic realization and computational speed.     

DEGRADATION OF NATURAL RESOURCES BY ENVIRONMENTAL POLLUTION——A Comparative Study Between Huizhou City and Zhaoqing City

１　ＩＮＴＲＯＤＵＣＴＩＯＮＢｏｔｈｒｅｓｏｕｒｃｅａｎｄｅｎｖｉｒｏｎｍｅｎｔａｒｅｒｅｌａｔｉｖｅｃｏｎｃｅｐｔｉｏｎｓ，ｗｈｉｃｈａｒｅｒｅｌａｔｉｖｅｔｏｔｈｅｓｙｓｔｅｍｓｔｈｅｙｒｅｆｅｒｔｏ．Ｔｈｅｅｎｖｉｒｏｎｍｅｎｔｏｆａｃｅｒｔａｉｎａｒｅａ（ｏｒａｃｅｒｔａｉｎｂｕｓｉｎｅｓｓ）ｉｓｐｏｓｓｉｂｌｙｔｈｅｒｅｓｏｕｒｃｅｓｏｆｔｈｅｓｕｒｒｏｕｎｄｉｎｇａｒｅａｓ（ｏｒａｎｏｔｈｅｒｂｕｓｉｎｅｓｓ）．Ｔｈｅａｔｍｏｓｐｈｅｒｅ，ｗａｔｅｒｂｏｄｉｅｓａｎｄｓｏｉｌｏｎｔ…     

Degradation of natural resources by environmental pollution

Compared the total agricultural production (TAP) of the 5 counties in Huizhou City with that of the corresponding 5 counties in Zhaoqing City during the period from 1980 to 1996, it can be seen that the TAP growth rate of the 5 counties in Huizhou City had been a little higher than that of the 5 corresponding counties in Zhaoqing City before 1983, but has been becoming lower than the latter since 1984, and the agricultural production in Huizhou City has been gradually becoming lag behind that in Zhaoqing City since then. The TAP loss in Huizhou City kept above 3×10⁸ yuan every year since 1986. Detailed investigation shows that the acid rain caused by the atmospheric pollution may be the main cause for the lower productivity of the land in Huizhou City. The atmospheric pollution arisen from rapid and extensive development of the economy in the Zhujiang(Pearl) River Delta Region has already greatly reduced the load capacity of the natural resources in Huizhou City and severely affected the sustainable development of the region.