西安市2012—2013年大气降尘的磁化率及指示意义

doi:10.11924/j.issn.1000-6850.casb15010245

中国农学通报 ›› 2015, Vol. 31 ›› Issue (19): 166-172.doi: 10.11924/j.issn.1000-6850.casb15010245

所属专题：农业气象

• 资源环境生态土壤气象 • 上一篇下一篇

西安市2012—2013年大气降尘的磁化率及指示意义

张俊辉

宝鸡文理学院陕西省灾害监测与机理模拟重点实验室

收稿日期:2015-01-30 修回日期:2015-05-03 接受日期:2015-05-25 出版日期:2015-07-28 发布日期:2015-07-28
通讯作者: 张俊辉
基金资助:
陕西省教育厅科研计划项目 “西安-咸阳-宝鸡大气降尘磁学特征及源解析” (12JK0476)。

Magnetic Susceptibility of Dustfall in Xi’ an City from 2012 to 2013 and Its Environmental Significance

Received:2015-01-30 Revised:2015-05-03 Accepted:2015-05-25 Online:2015-07-28 Published:2015-07-28

摘要/Abstract

摘要： 为了了解西安市大气降尘对环境的影响状况，对西安市2012—2013年按月收集的大气降尘样品进行磁化率实验，并与环境质量公报、气象资料的相关数据分析比较。结果表明，2012年和2013年大气降尘样品的低频质量磁化率和高频质量磁化率相对较高，表明西安市大气降尘中亚铁磁性矿物的含量较高。大气降尘的磁化率随时间变化特征与空气污染物月平均浓度随时间的变化特征基本一致，表明大气降尘的磁化率随时间的变化特征可以很好地反映空气污染状况。西安市每年从11月到次年3月开始集中供暖，供暖期间，燃煤量增加，释放到大气中的燃煤等磁性颗粒粉尘的量相应增加，另外受西安市特殊的地形影响，不利于大气粉尘的扩散，导致冬季粉尘的富集进而加剧空气污染。

关键词: 现代农业, 现代农业

Abstract: The paper aims to understand the effects of dustfall on the environment in Xi’ an. The test on magnetic susceptibility was carried out with the dustfall samples of Xi’ an. These samples were collected monthly from January 2012 to December 2013. The magnetic parameters (χlf, χhf) indicated a relatively high concentration of magnetic minerals in Xi’an City, dominated by ferrimagnetic minerals. Magnetic susceptibility of dustfall was consistent with the Air Pollution Index (API), suggested that the χlf could demonstrate the air pollution of Xi’ an City. In summer the air quality was better and in winter the air was polluted strongly. The concentration of magnetic minerals and air quality had significant changes according to the seasons of each year, and the values rose from December to January of next year, and decreased in summer, which not only came from the pollution of coal-burning, but were also influenced by the special meteorological conditions of temperature inversion in winter.

张俊辉. 西安市2012—2013年大气降尘的磁化率及指示意义[J]. 中国农学通报, 2015, 31(19): 166-172.

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西安市2012—2013年大气降尘的磁化率及指示意义

Magnetic Susceptibility of Dustfall in Xi’ an City from 2012 to 2013 and Its Environmental Significance

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