苏州市大气PM_(2.5)中水溶性无机离子的源解析及其气象因子分析

为了探明PM_(2.5)中水溶性无机离子的来源和气象因子对其浓度变化的影响,利用2012年2、5、8和11月苏州市PM_(2.5)中水溶性无机离子浓度和本站气象观测数据,分析了苏州市水溶性无机离子的时间变化特征,解析了当地PM_(2.5)中水溶性无机离子的主要来源,探讨了气象因素对离子组分的影响。结果表明:(1)苏州市PM_(2.5)中水溶性无机离子年均浓度大小依次为:SO_4~(2-)NO_3~-NH_4~+Na~+Cl~-K~+Ca~(2+)Mg~(2+)F~-;SO_4~(2-)、NH_4~+和NO_3~-为PM_(2.5)中最重要的3种水溶性无机离子物种,其总和占PM_(2.5)总质量浓度的50.9%。各离子的季节浓度特征均为冬季最高、夏季最低。(2)通过运用主成分分析法对苏州市PM_(2.5)中水溶性无机离子进行来源分类解析,发现第一类为二次污染源和生物质燃烧,其贡献率为32.84;第二类为道路扬尘及工业排放,其贡献率为19.99%;第三类为海盐污染,其贡献率为18.43%。(3)通过水溶性无机离子与气象条件的相关性分析发现,风向、风速和温度与水溶性无机离子浓度的相关性较显著,这三者是颗粒物浓度变化的主要影响因子。(4)利用HYSPLIT后向轨迹模式对外来污染物进入苏州市的轨迹进行聚类分析后发现:因受季风气候影响,苏州市外来污染物的输入路径存在明显的季节性变化特征,其中夏半年输送主径源自海上,冬半年主径源自内陆。     

Influence of solar wind energy flux on the interannual variability of ENSO in the subsequent year

作为地球系统的主要能量来源,进入地磁系统的太阳风能量通量(E_(in))一直难以估算。因此,E_(in)对气候的影响也没有得到广泛的研究。基于三维磁流体动力模拟估算的E_(in),本文指出,太阳风能量通量不仅存在准11年周期的年代际变率,同时还存在2-4年周期的年际变率。与以往主要关注太阳活动在年代际尺度上的气候效应的研究不同,本文揭示出太阳风能量通量与次年ENSO年际变率存在显著的联系。     

引入调节变量的入境旅游对消费物价影响分析——基于1999~2014年香港季度数据的实证研究

引入调节变量,采用香港1999~2014年的季度统计数据建立一个新实证模型,利用Pearson相关性分析方法、计量经济学非平稳数据分析方法和Granger因果关系检验方法系统分析了入境旅游、经济增长和消费物价之间的关系。研究结果表明：① 入境旅游、经济增长和消费物价之间存在相关性和稳定的长期均衡关系;入境旅游对消费物价的带动性高于经济增长。② 入境旅游与消费物价、经济增长和消费物价、入境旅游和经济增长之间都存在单向Granger因果关系,入境旅游发展必然带动经济增长并影响消费物价。③ 入境旅游对消费物价产生影响的原因主要是入境游客规模扩大和结构单一;负面影响主要表现在影响当地底层民众生活品质、损害当地旅游形象和主客感情;对策主要为拓展入境旅游类型并使旅游发展红利惠及底层民众。     

DEM空间插值方法对土壤侵蚀模拟的影响研究——以USPED分析干热河谷典型冲沟为例

为探索不同空间插值方法得到的DEM如何影响土壤侵蚀模拟效果,本文选择金沙江干热河谷区典型冲沟为研究对象,利用野外测量高程数据,采用反距离加权(IDW)、析取克里格(DK)、局部多项式(LPI)和张力样条函数(ST)4种方法构建高精度DEM。基于USPED模型模拟冲沟的土壤侵蚀,对比不同空间插值方法的精度、土壤侵蚀的空间分布,采用相对差系数对比不同插值在土壤侵蚀研究中的相似性。结果表明：DEM空间插值的精度排序为ST相似文献   

Otolith Microstructure Analysis Reveals Different Growth Histories of Japanese Sardine (Sardinops melanostictus) in the Oyashio Waters

After decades of low year classes,the stock of Japanese sardine(Sardinops melanostictus)has begun to recover since the mid-2000s.The hatch dates and otolith growth rates of age-0 juvenile sardine,which were collected in the subarctic Oyashio waters in autumn 2018,were determined from an otolith microstructure analysis.The sardines were hatched from late January to late April,while mostly in February and March.The otolith growth rate increased continuously up to 60 d after hatching and thereafter de-creased.The revealed growth rate in a crucial growth period is faster than that reported for juvenile sardines collected in the 1990s,which is coincided with the recent recovery trend of the sardine stock.Two groups with different hatch dates,growth histories,and migration routes were identified using unsupervised random forest clustering analysis.They were considered inshore and offshore migration individuals in accordance with recent researches.In the offshore group,a high proportion of sardine juveniles hatched late and grew faster in the Kuroshio-Oyashio transitional waters,a finding consistent with the hypothesis of growth-rate-dependent re-cruitment.This finding on the population composition and growth rate of juvenile sardine in the Oyashio waters can be a basis for an improved prediction of their survival and provides us with valuable information on the recruitment processes of this stock during the period of stock recovery.     

云南白牛厂超大型银多金属矿床黄铁矿的标型特征及其成因意义

本文通过对白牛厂银多金属矿床黄铁矿的化学成分标型、微量元素标型和热电性标型的研究得出该矿床属热液喷流沉积矿床。     

江苏省城市专业气象服务系统

本文系统介绍了城市专业气象服务系统的设计思路、流程、功能特征和采用的Internet／Intranet（WWW）技术、Asp语言动态页面设计、自动化语音合成等技术,实现了Novell网、NT、9210网（气象卫星综合应用业务系统）、地面气象专线等联结采集实时气象信息和预报信息。系统具有应用、推广价值。     

第四纪地质图件和生态与环境图系的编制及展望

近２０年来,随着全球水资源,地质灾害,土壤利用及沙漠化等问题的日益严重,国内外不少部门和专家相应地编制了第四纪地质图件和生态瑟环境系列图件,提高一第四纪研究的水平,也为国土整治提供了科学依据。本篇主要通过这些图件来分析当前第四纪地质图和生态与环境系列图编制的动态和问题。     

洪水风险预测业务系统

介绍了在地图信息可化工具Ｍａｐｉｎｆｏ数据库和超文本库的支持下,通过Ｗｉｎｄｏｗｓ的ＯＬＥ自动化技术建成的洪水风险预测业务系统。它以直以形象的电子地图针气象、洪水、水文以及投保户保险信息,包括历史洪以淹实况机地结合起来;并通过与历史洪水受淹数据库、气象－洪水数据库等关联作出洪水风险预测,为有关部门业务 指导决策提供依据。     

Sedimentary cycle pattern and stacked style of sand-body of the Lower Jurassic Sangonghe Formation in belly of Junggar Basin

The coarse grain braided river delta in Jurassic Sangonghe Formation of Junggar Basin formed the main Mesozoic reservoir system. At present,there are obvious different opinions on the sedimentary cycle characteristics of Jurassic Sangonghe Formation,and there is a lack of research on the driving mechanisms of sedimentary cyclicity,which leads to a great dispute on the stacked style of sand-bodies. Using 38 wells coring and logging data in the belly of Junggar Basin,based on principles and methods of sedimentology and sedimentary basin analysis,the characteristics of sedimentary cycle in Sangonghe Formation are systematically analyzed. The stacked style and combination rule of sand-bodies are studied in detail within sedimentary cyclic framework. The characteristics of basement subsidence and multi-stage uplifting during the Early Jurassic of Junggar Basin are discussed,so as to clear the driving mechanisms of positive sedimentary cycle. The Sangonghe Formation in the study area is divided into four system tract level positive cycles with no reverse cycle deposition,which reflects the sedimentary characteristics of slow lacustrine transgress and fast lacustrine retrogress. The sand-bodies in the braided river delta front of the Sangonghe Formation show five stacking patterns: Strong erosion of superimposed sand-body by subaqueous distributary channel,weak erosion of superimposed sand-body by subaqueous distributary channel,superimposed river-mouth bar on subaqueous distributary channel,distal bar-blanket sand assemblage,beach bar sand-body. The first cycle is the intermittent distribution of beach bar sand-bodies. The second cycle includes continuous distribution of strong erosion of superimposed sand-body by subaqueous distributary channel,weak erosion of superimposed sand-body by subaqueous distributary channel,and superimposed river-mouth bar on subaqueous distributary channel. The third cycle is composed of relatively continuous distribution of weak erosion of superimposed sand-body by subaqueous distributary channel and distal bar-blanket sand assemblage. The fourth cycle is scattered distribution of beach bar sand-body. It is possible because of the slow subsidence and intermittent rapid uplift of the basement of Junggar Basin that regressive superposition and the scour interface between each sedimentary cycle are formed.