2008年1次沙尘暴事件对厦门岛大气中SO2等污染物含量的影响     

汪建君  陈立奇  张远辉  杨绪林  孙霞  李伟  詹建琼  徐国杰 《台湾海峡》2010,29(3):297-303

2008年5月27～29日源自内蒙古南部的沙尘暴于5月30日到达厦门.受其影响,30日晚厦门风速最高达到12.6 m/s;31日本监测站大气中CO、NO2和NO含量明显下降,分别从551.3μg/m^3下降至218.9μg/m^3,从25.0μg/m^3下降至6.7μg/m^3,从8.1μg/m^3下降至0.1μg/m^3;6月1日其分别回升至682.4、28.7、6.5μg/m^3.与CO、NO2和NO不同,PM10和SO2含量在5月31日没有明显变化,PM10含量从5月31日晚的10.1μg/m^3上升至6月1日的232.6μg/m^3,SO2含量从5月底的25.0μg/m^3上升至52.0μg/m^3,并且两者的变化显示出较好的相关性（R2=0.65）.据此认为本次沙尘暴到达厦门时,在引起PM10含量增加的同时还引起了SO2含量的升高.这是沙尘暴引起中国南方城市SO2含量升高的首次报道.尽管目前SO2在中国的分布和传输已有较多研究,但对于沙尘暴在中国南方城市传输SO2的机制仍需进一步的探讨.  相似文献   

波浪作用下渤海湾近岸海域污染物的输移扩散规律   总被引：10，自引：3，他引：10  

孙涛  陶建华 《海洋与湖沼》2004,35(2):110-119

用物理模型实验和数学模型计算相结合的方法,研究了均匀缓坡岸滩上,规则波及不规则波浪作用下形成的沿岸流及其对岸边排放污染物输移扩散的影响。针对渤海湾的地形和主要波浪方向,研究了渤海湾主要排污口附近单纯波浪以及波浪、潮流共同作用下近岸海域内流动速度分布与相应污染物输移扩散规律。结果表明,在渤海湾近岸海域(一定范围内),污染物输移扩散受到波浪作用的影响,表现为平行岸线方向。波浪作用使得远离污染物排放口的滩涂受污染的影响增大。  相似文献   

苏北浅滩海底地下水排放及其对海域营养盐通量的贡献     

赵世彬  姚庆祯  于志刚  许博超  韦钦胜  南海明 《海洋与湖沼》2018,49(5):1038-1044

海底地下水排放(SGD)是近海海域的一个重要的营养盐来源。本研究借助多种天然镭同位素对春季苏北浅滩海域的SGD及其携带入海的营养盐通量进行量化评估。研究发现:苏北浅滩海域的~(224)Ra、~(223)Ra和~(226)Ra等镭同位素的浓度水平较高,呈现近岸高、远岸低的分布趋势;根据~(224)Ra/~(226)Ra的"表观年龄模型"估算的水龄的分布情况推断,春季该海域表层水体主体流向为东北向,流速约为0.1m/s,这与前人物理海洋数值模拟结果一致;最终利用226Ra质量平衡模型发现海域的SGD通量为(46±29)cm/d,由其携带入海的溶解态无机氮、磷、硅营养盐(DIN、 DIP、 DSi)等的通量分别为(2.6±3.1)×1~09、(3.0±2.5)×10~6和(5.5±4.2)×10~8mol/d。  相似文献   

持久性有机污染物对珊瑚藻生长和生理生态特性的影响     

聂磊  王炳  廖宝林  彭丹  管斌 《海洋湖沼通报》2018,(6):75-84

以蒽和Aroclor1254为典型污染物质,分析了持久性有机污染物对于采自深圳大鹏湾(N114°36′,E 22°25′)的珊瑚藻生长和生理生态特性的影响效果。研究结果表明,随着蒽和Aroclor1254处理浓度的增加,珊瑚藻的光合色素含量下降,细胞膜透性和活性氧代谢产物丙二醛含量增加,最终停止生长。尽管低浓度有机污染物10.0～20.0μg·L-1蒽和8.0～16.0μg·L-1 Aroclor1254处理下藻体分泌的胞外多糖含量较对照略有上升,但随着污染物浓度上升,胞外多糖含量明显下降,胞外多糖的自由基(包括O2·-、·OH和DPPH自由基)清除能力也同样明显走低。蒽和Aroclor1254对珊瑚藻生理和生长的抑制作用有较明显的剂量—效应关系,因此持久性有机污染物对于珊瑚藻而言具有明显毒害作用。两种有机污染物对于珊瑚藻的毒害效应类似,相较而言,Aroclor1254毒性效应稍大于蒽。  相似文献   

我省地热资源开发利用方向     

张立君  孙立维  杜芳 《黑龙江国土资源》2009,(5):58-58

一、推广集约化新技术,提高资源利用率 （一）地热资源的梯级利用 为使地热资源长期为人类服务就必须推广集约化新技术,提高资源的利用率。地热资源在各行业利用的同时应大力开发高效利用集约化新技术,降低尾水排放温度,提高资源利用率,同时解决地热水排放对环境造成的污染问题。  相似文献   

A preliminary study of variations of the Changjiang Diluted Water between August of 1999 and 2006     

ZHOU Feng  XUAN Jiliang  NI Xiaobo  HUANG Daji 《海洋学报(英文版)》2009,28(6):1-11

A large area hypoxia has been already reported respectively by two interdisciplinary surveys off the Changjiang Estuary since summer of 1999 and 2006. The hypoxic zone shows distinct year-to-year variations. Observed oceanographic data are first analysized and reveal a big difference for the Changjiang Diluted Water (CDW) between these two periods. These great changes are related to the tremendous reduction of the freshwater discharge and variations of wind fields between these two years. It is also found that the monthly mean intrusion of Kuroshio and its branches has increased in the northern East China Sea (ECS), but decreased in the southern ECS in August of 2006 as compared with 1999 on the base of general circulation models. Then, the Regional Ocean Modelling Systems is applied to the East China Sea to evaluate the contributions and relative importance of impacts from the river discharge, wind forcing and open boundary data. Our simulations reproduce the phenomena that more fresh water extends northeastward in 2006 and forms a negative SSS anomaly to the northeast of the river mouth as compared with 1999, which is consistent with observations. The five group numerical tests suggest that the wind forcing dominates the CDW variations followed by the Kuroshio and its branches. The study implies important roles played by hydrodynamic processes on the variability of hypoxic zone in the study areas.  相似文献   

排海污水中氮、磷及有机污染物处理技术进展          下载免费PDF全文

王美娟 《海洋开发与管理》2009,26(9):30-32

排海污水处理直接关系到近海的污染,而氮、磷及有机污染物是近海的重要污染物。文章综述了几种对氮、磷及有机污染物处理的新工艺技术和各工艺的进展状况并提出应尽快推广应用。  相似文献   

The impact of physical processes on pollutant transport in Hangzhou Bay     

李宁  毛志华  张庆河 《中国海洋湖沼学报》2009,27(2):266-276

A Lagrangian tracer model is set up for Hangzhou Bay based on Coupled Hydrodynamical Ecological model for Regional Shelf Sea (COHERENS). The study area is divided into eight subdomains to identify the dominant physical processes, and the studied periods are March (the dry season) and July (the wet season). The model performance has been first verified by sea-surface elevation and tidal current observations at several stations. Eight tracer experiments are designed and Lagrangian particle tracking is simulated to examine the impact of physical processes (tide, wind and river runoff) on the transport of passive tracer released within the surface layer. Numerical simulations and analysis indicate that: (1) wind does not change the tracer distribution after 30 days except for those released from the south area of the bay during the wet season; (2) the tide and the Qiantang River runoff are important for particle transport in the head area of the bay; (3) the Changjiang River runoff affects the tracer transport at the mouth of the bay, and its impact is smaller in the dry season than in the wet season. Supported by the Natural Science Foundation of China (No.40576080); National High Technology Research and Development Program of China (863 Program, No. 2007AA12Z182)  相似文献   

A calibration method of Argo floats based on multiple regression analysis     

纪风颖  王凡 《中国海洋湖沼学报》2006,24(2):118-124

1 INTRODUCTION Argo floats are instruments that move freely with the ocean current at fixed parking depths and cycle from a profiling depth to the sea surface at regular time intervals. While rising to the surface, these autonomous floats take profiles of…  相似文献   

工业部门污染物治理协同控制温室气体效应评价——基于重庆市的实证分析     

王敏  冯相昭  杜晓林  吴莉萍  赵梦雪  王鹏  安祺 《气候变化研究进展》2021,17(3):296-304

以高能耗为主要特征的工业部门是大气污染物和温室气体的重要排放源.为推动协同管控,文中结合生态环境部在重庆市组织开展的试点工作,对工业企业NOx污染治理协同控制温室气体的效应进行了量化分析.结果表明,以末端治理为手段的NOx治理措施协同控制温室气体的效果为负,即工业企业去除1 t NOx会直接或间接增加CO2排放1.81...  相似文献