欢迎来到麦多课文档分享! | 帮助中心 海量文档,免费浏览,给你所需,享你所想!
麦多课文档分享
全部分类
  • 标准规范>
  • 教学课件>
  • 考试资料>
  • 办公文档>
  • 学术论文>
  • 行业资料>
  • 易语言源码>
  • ImageVerifierCode 换一换
    首页 麦多课文档分享 > 资源分类 > PPT文档下载
    分享到微信 分享到微博 分享到QQ空间

    Changes in Concentration of Chemical Species using Back-.ppt

    • 资源ID:379479       资源大小:724KB        全文页数:19页
    • 资源格式: PPT        下载积分:2000积分
    快捷下载 游客一键下载
    账号登录下载
    微信登录下载
    二维码
    微信扫一扫登录
    下载资源需要2000积分(如需开发票,请勿充值!)
    邮箱/手机:
    温馨提示:
    如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
    如需开发票,请勿充值!如填写123,账号就是123,密码也是123。
    支付方式: 支付宝扫码支付    微信扫码支付   
    验证码:   换一换

    加入VIP,交流精品资源
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。

    Changes in Concentration of Chemical Species using Back-.ppt

    1、Changes in Concentration of Chemical Species using Back-Trajectory Analysis,Atlantas Emissions Affecting its surroundings,Focus,Determine whether emissions of certain chemical species (sulfate, elemental carbon, organic carbon) are advected by air flow from Atlanta to a rural location outside of Atl

    2、anta (Yorkville) Use a back-trajectory program (developed by Tao Zeng) that utilizes MM5 input data to determine flow direction and changes with time Use chemical concentration data (provided by Dr. Wei Liu) to track concentration changes with time. Measurements in Atlanta are taken every day, and m

    3、easurements in Yorkville are taken every three days.,Yorkville is located about 42 miles west-northwest of Atlanta.A flow from the southeast, east-southeast, or south-southeast will possibly allow Atlantas boundary layer chemical composition to affect Yorkvilles boundary layer chemical composition,S

    4、O4 (Sulfate) Concentrations wrt Time,An example of a source of sulfate would be a power plant that burns coal. There could potentially be many sources of sulfate in the Surrounding area.The sulfate curve for Atlanta essentially the same as the sulfate curve for Yorkville.Back trajectory analysis may

    5、 or may not explain Similarities.,Elemental Carbon changes wrt Time,Elemental carbon (EC) or Black carbon is a product of Fuel combustion.Atlanta is most likely the main source of EC in YorkvilleThe Atlanta curves and Yorkville curves are similar except a period around April 19 and 20.Back Trajector

    6、y analysis will Most likely show if the source of EC in Yorkville is Atlanta EC emissions,Organic Carbon Concentration wrt Time,Organic carbon (OC) also is a product of fuel combustion.Atlanta is most likely the main source of OC in YorkvilleThe Atlanta curves and Yorkville curves are similar except

    7、 a period around April 19 and 20.Back Trajectory analysis will Most likely show if the source of OC in Yorkville is Atlanta OC emissions,Back trajectory from April 9 at 00Z to April 11 at 00Z, 2000.This shows a shift in flow from the Northwest on April 9 to Southwest on April 10.This flow pattern co

    8、uld Potential bring Atlanta Emissions to Yorkville,Back trajectory from April 10 at 00Z to April 12 at 00Z, 2000.This shows the Continued flow from The southwest Through the two days of April 10 and 11.This flow pattern would also potentially bring Atlanta emissions to Yorkville,Back trajectory from

    9、 April 11 at 00Z to April 13 at 00Z, 2000This shows a shift of Flow from the Southwest on April 11 to Flow from the Northeast On April 12This could decrease Flow of emissions From Atlanta,Back trajectory from April 12 at 00Z to April 14 at 00Z, 2000This shows flow shifting From the west-northwest On

    10、 April 12 to flow from The east-southeast on April 13This is an optimal flow Pattern for transport of Atlanta emissions To YorkvilleAtlanta and Yorkville Concentration curves have high concentration and are similar,Back trajectory from April 13 at 00Z to April 15 at 00Z, 2000This shows a general Pat

    11、tern of flow from The southeast over the Days of April 13 and 14The optimal flow Pattern continues,Back trajectory from April 14 at 00Z to April 16 at 00Z, 2000This shows flow from The south by southeast On April 14 shifting to a Flow from the west on Towards April 16.The optimal flow pattern contin

    12、ues and then slightly shifts,Back trajectory from April 15 at 00Z to April 17 at 00Z, 2000This shows a shift in Flow from the southeast On April 15 to flow from the southwest on April 16The optimal flow pattern Changes to a pattern That Is less favorable for flow Of emissions to Yorkville,Back traje

    13、ctory from April 18 at 00Z to April 20 at 00Z, 2000This shows flow from the northeast over the days Of April 18 and 19The optimal flow pattern EndsThis is also the period when Atlanta and Yorkville OC And EC curves are not similar. OC and EC are still high in Atlanta, but are low in Yorkville,Back T

    14、rajectory from April 19 at 00Z to April 21 at 00Z, 2000This shows a flow from The northwest on April 19 shifting to flow From the southwest on April 20.Optimal flow is not present Again until later in the monthOC and EC curves continue To have dissimilar characteristics,Back Trajectory from April 20

    15、 at 00Z to April 22 at 00Z, 2000This shows flow from the West over the days of April 20 and 21,Back trajectory from April 28 at 00Z to April 30 at 00Z, 2000This shows flow from The northwest over the Days of April 28 and 29,Back Trajectory from April 29 at 00Z to May 5 at 00Z, 2000This shows a shift

    16、 in Flow From the northwest on April 29 to flow from The east on April 30This flow could advect Emissions from Atlanta To Yorkville.The EC, OC, and sulfate Curves are similar and High in concentration,Preliminary Conclusions,EC and OC concentrations in Yorkville have a high possibility of being affe

    17、cted by Atlanta emissions of theses chemical species. Back-Trajectories show high concentrations of OC and EC in Yorkville when flow is coming from the direction of Atlanta and low concentrations when flow is not coming from Atlanta. Sulfate concentrations are not as obviously affected by flow from Atlanta and may not be as sensitive to changes in Atlantas concentrations.,


    注意事项

    本文(Changes in Concentration of Chemical Species using Back-.ppt)为本站会员(bonesoil321)主动上传,麦多课文档分享仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文档分享(点击联系客服),我们立即给予删除!




    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1 

    收起
    展开