强沙尘袭击甘肃,并蔓延、波及东部人口稠密地区

自5月23日起,强沙尘开始袭击甘肃北部,并逐渐向东蔓延。5月24日,沙尘暴蔓延至甘肃南部以及宁夏、内蒙等地。25日,沙尘袭击进一步向东蔓延,抵达山西、河南、河北。沙尘所过之地,黄沙漫天,PM10浓度迅速超标。如下列重点城市AQI日报图所示,这次源于甘肃的强沙尘袭击最终在5月25日造成大范围的PM10空气污染。波及陕甘宁以及华北大部地区,并在相当大的范围内表现为中度到重度污染。

全国重点城市AQI日报:5月23日

全国重点城市AQI日报:5月23日

全国重点城市AQI日报:5月24日

全国重点城市AQI日报:5月24日

monitored_AQI_05252014

沙尘颗粒的粒径较大,多数肉眼可以,所以沙尘来临表现为黄沙漫天。但是沙尘里面真正对人体有害,被纳入空气质量指标体系的仍然是可吸入颗粒物,即PM10。历史上,我们也监测总悬浮颗粒物,即TSP,用TSP可以更好地描述沙尘总量,但是TSP并不直接对应健康效应。另外,沙尘中粒径大的部分,较易在短距离内沉降,即较快脱离悬浮状态回到地面。而其粒径较小的部分,比如PM10则更易长途奔袭,长期悬浮在空气中,被迅速传输至人口稠密地区。这对那些远离沙漠、戈壁的人们来说,沙尘引起PM10超标,仿佛污染从天而降。

可惜的是矮马预报和过往遇到沙尘天气一样,没有预报出这次沙尘暴袭击带来的PM10污染(如下图所示)。原因是,在目前的矮马预报系统中,我们还没有加入预测沙尘起尘机制的预报模块。在预报模式中缺少沙尘的源排放数据,当然就没有可能预报沙尘的严重影响。可喜的是,我们正在测试一个先进的起尘机制模块,有望在不远的将来,将它整合进矮马预报系统,从而实现对强沙尘天气影响内地空气质量的情况提前进行准确预报。

矮马预报:5月25日AQI空间分布

矮马预报:5月25日AQI空间分布

文章分类 预报札记
6 comments on “强沙尘袭击甘肃,并蔓延、波及东部人口稠密地区
  1. all the time i used to read smaller content that as well clear their motive, and that is also
    happening with this paragraph which I am reading at this time.

  2. Thanks a bunch for sharing this with all people you actually
    know what you are talking approximately! Bookmarked.
    Kindly also seek advice from my web site =). We will have a link alternate
    contract among us

    Feel free to visit my web blog; http://www.koan.at/UserProfile/tabid/61/userId/545819/Default.aspx

  3. dewapoker说道:

    Hi! This is my first comment heгe ѕo I just ԝanted to givе a
    quick shout out andd tell you I really enj᧐y reading through your articles.
    Can yoou sugygest any ߋther blogs/websіtes/forums that deaⅼ
    with the saame topіcѕ? Thanks a ton!

    Feel free to surf to my site … dewapoker

  4. VikingXL说道:

    Good day very nice blog!! Man .. Excellent .. Superb ..

    I’ll bookmark your blog and take the feeds also?I’m satisfied to search out so many useful info right here in the put up,
    we’d like work out extra techniques on this regard, thanks
    for sharing.

    Also visit my blog :: VikingXL

  5. dewapoker Pro说道:

    What’s up, its good post about media print, wе
    all know media is a wonderful source of informatiоn.

    Herre is my website: dewapoker Pro

  6. Hi there Dear, are you actually visiting this web page regularly, if so
    afterward you will absolutely take nice experience.

79 Pings/Trackbacks 对 "强沙尘袭击甘肃,并蔓延、波及东部人口稠密地区"
  1. … [Trackback]

    [...] Find More on to that Topic: aimayubao.com/blog/2014/05/26/强沙尘袭击甘肃,并蔓延、波及北方大部地区/ [...]

  2. … [Trackback]

    [...] Read More on that Topic: aimayubao.com/blog/2014/05/26/强沙尘袭击甘肃,并蔓延、波及北方大部地区/ [...]

  3. … [Trackback]

    [...] There you can find 58295 additional Info to that Topic: aimayubao.com/blog/2014/05/26/强沙尘袭击甘肃,并蔓延、波及北方大部地区/ [...]

  4. … [Trackback]

    [...] Find More here to that Topic: aimayubao.com/blog/2014/05/26/强沙尘袭击甘肃,并蔓延、波及北方大部地区/ [...]

  5. … [Trackback]

    [...] Read More on that Topic: aimayubao.com/blog/2014/05/26/强沙尘袭击甘肃,并蔓延、波及北方大部地区/ [...]

dewapoker进行回复 取消回复

电子邮件地址不会被公开。 必填项已用*标注

*

我是人类 *

您可以使用这些HTML标签和属性: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>