香港地区大气降水的D和18O同位素研究

研究了香港地区近20 a(1986-2002)大气降水的氢、氧同位素组成,提出了大气降水线方程为6D=8.13δ18O+11.392,并与全国及全球降水线方程进行对比,揭示了该方程的特征.对全年氘盈余及降水线特征的研究表明.香港地区全年降水来源较为单一,主要为海洋性气团,夏季大气降水同位素组成主要受夏季风或夏季台风的影响,加权平均月降水6值与月降水、月气温均呈负相关关系;降水中δD与δ18O的降水量效应明显.且该影响远远掩盖了温度效应.     

香港采取积极措施防治大气污染

通过对香港地区大气污染防治有关政策法规及措施的综述 ,介绍了香港的工业空气污染控制、机动车空气污染控制、各种损耗臭氧层物质的管制等大气污染防治的概况 (防治措施及相关效果 )。     

到香港看"荒凉"

从深圳河北岸隔着高高的铁丝网南望香港,除了起伏的青山以外,几乎看不到什么起眼的建筑,更难看到人的踪迹。可以说是一派荒凉景象,与深圳这边新楼耸立的繁闹市区相比,真有天壤之别。但是,好像没有内地人把那当作是真的香港。人们心目中的香港,是港岛笋立的摩天大厦,是骆克道的灯红酒绿,是铜锣湾的繁华商铺,是弥顿道昼夜不息的灯光、人流与车流。     

Identification and spatial patterns of coastal water pollution sources based on GIS and chemometric approach

Comprehensive and joint applications of GIS and chemometric approach were applied in identification and spatial patterns of coastal water pollution sources with a large data set （5 years （2000-2004）, 17 parameters） obtained through coastal water monitoring of Southern Water Control Zone in Hong Kong. According to cluster analysis the pollution degree was significantly different between September-next May （the 1st period） and June-August （the 2nd period）. Based on these results, four potential pollution sources, such as organic/eutrophication pollution, natural pollution, mineral/anthropic pollution and fecal pollution were identified by factor analysis/principal component analysis. Then the factor scores of each monitoring site were analyzed using inverse distance weighting method, and the results indicated degree of the influence by various potential pollution sources differed among the monitoring sites. This study indicated that hybrid approach was useful and effective for identification of coastal water pollution source and spatial patterns.     

Distribution patterns of octylphenol and nonylphenol in the aquatic system at Mai Po Marshes Nature Reserve, a subtropical estuarine wetland in Hong Kong

Spatial and temporal distribution of octylphenol （OP） and nonylphenol （NP） in Mai Po Marshes, a subtropical estuarine wetland in Hong Kong, were investigated. Surface water samples were collected every month from 11 sites during the period of September- December 2004. Concentrations of OP and NP ranged from 11.3 to 348 ng/L and from 29 to 2591 ng/L, respectively. The high levels of NP and OP were found in November and December than in September and October. The levels of OP and NP have no significant spatial differences except September. Total organic matter in the sediments appeared to be an important factor in controlling the fate of these compounds in the aquatic environment.     

香港及珠三角地区MODIS高分辨率气溶胶光学厚度的反演

为了有效解决地区性和城市范围内的气溶胶分布并反演陆地上气溶胶的性质,一种针对中分辨率成像光谱辐射计(MODIS)的气溶胶反演新算法应运而生.本文首先通过改良的最小反射率技术(MRT)来确定季节性的地表反射率和利用瑞利通道辐射率中解析出大气上气溶胶的反射率来估计气溶胶的反射系数.结果表明,MRT地表反射率的图像和MODIS地表反射系数的产品(MOD09)有很好的契合度.两者的相关系数高达0.9.此外,考虑到不同气溶胶的光学性质和太阳观测组合对计算辐射传输的影响,本研究还制定了全面广泛的差算表(LUT).由此产生的卫星500m分辨率的气溶胶光学厚度(AOT)和香港太阳光度计(AERONET)及MicrotopsⅡ观测资料的相关系数r分别为0.96和0.87(相伴概率值P<0.0001).该研究证明了城区高分辨率气溶胶反演的可行性,还能帮助研究气溶胶的分布和城区大气瞬态污染的影响.此外,MODIS 500m分辨率的气溶胶光学厚度图像还可用于研究跨境气溶胶,使定位珠江三角洲区域污染源变得可行.     

香港发生首宗邮局劫案匪徒历时57秒劫走11万

在某省会城市一家医院工作的刘女士很是纳闷,自己的银行卡和身份证好好的,密码也没告诉过任何人,可是去银行取钱时,却发现卡上的两万元钱没了,     

污水搬家 意欲何为

一贯对污染治理不甚热心的香港政府，在临近“九七”之际，未经全面的环境影响评价，便匆匆单方面批出耗资200多亿港元、跨越“九七”的排污工程第一期工程合约。港府的做法，违反了中英达成协议后再批出排污工程首期工程合约的诺言；而它的排污工程对香港和南中国海的生态环境究竟能否起到保护作用，也还是一个问题。