首页> 外文OA文献 >Dimensions of the Los Angeles SO_2/sulfate problem
【2h】

Dimensions of the Los Angeles SO_2/sulfate problem

机译:洛杉矶SO_2 /硫酸盐问题的维度

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Sulfur dioxide emission trends are reviewed in relation to sulfur dioxide air quality in the Los Angeles area. Emission fluctuations over the 19-year period from 1956 through 1974 are explained in terms of emission control policy changes. Simple statistical tests indicate that measured SO_2 air quality levels at Long Beach and downtown Los Angeles track changes in emission strength at nearby sources and from sources with low effective stack height. ududAtmospheric oxidation of SO_2 to form particulate sulfates is discussed. Sulfate air quality measurements at Los Angeles show a broad summer seasonal peak in all years of record, with isolated periods of very high sulfate concentration in some winters of record. The geographic distribution of long term average sulfate concentrations is examined and found to be rather uniform across existing monitoring stations in the Los Angeles Basin. Fluctuations in measured sulfate values from day to day are shown to track changes in inversion height, relative humidity, total suspended particulate levels, and ozone concentrations. From these relationships, it is suggested that day-to-day fluctuations in sulfate concentration are driven mainly by changes in SO_2 to sulfate reaction rate and by changes in the effective mixing volume of the air basin.
机译:回顾了洛杉矶地区与二氧化硫空气质量相关的二氧化硫排放趋势。从排放控制政策的变化来解释1956年至1974年这19年间的排放波动。简单的统计测试表明,在长滩和洛杉矶市中心测得的SO_2空气质量水平跟踪了附近排放源和有效烟囱高度较低排放源的排放强度变化。 ud ud讨论了SO_2的大气氧化形成颗粒状硫酸盐。洛杉矶的硫酸盐空气质量测量显示,在所有记录的年份中,夏季都有一个季节性的高峰,在某些记录的冬季中,硫酸盐浓度处于孤立的时期。对长期平均硫酸盐浓度的地理分布进行了检查,发现洛杉矶盆地现有监测站之间的硫酸盐浓度相当均匀。每天测量到的硫酸盐值的波动显示出跟踪高度,相对湿度,总悬浮颗粒水平和臭氧浓度的变化。根据这些关系,建议硫酸盐浓度的日常波动主要是由SO_2对硫酸盐反应速率的变化以及空气池有效混合量的变化引起的。

著录项

  • 作者

    Cass Glen R.;

  • 作者单位
  • 年度 1975
  • 总页数
  • 原文格式 PDF
  • 正文语种 {"code":"en","name":"English","id":9}
  • 中图分类

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号