Meteorological authorities said Lhasa was not haze but over Lhasa | haze Speck | | Speck _ news

Authorities wide nets of Lhasa News December 21, according to voice of the aspect ratio reported in these two days, Lhasa's weather is not so good, the online voice said, Lhasa emerged called "Haze" weather, visibility less than five kilometres, causing over gonggar airport aircraft returned, some netizens said, "haze finally get their hands on the last side of the pure land".

In this regard, the latest response, said the meteorological departments, over Lhasa is not a "Haze" weather, but a "Speck" weather. Causing the floating dust weather was mainly due to warmer, thermal gradient difference gets bigger, cold and warm air at high altitude standoff, winds dry, surface formed of loose sand and dust storms.

In addition, for the "ups and downs" don't have to worry about the weather in mid-January 2007, April 2010, when most of the cities in the country do not appear when fog, haze, dust weather also occurred in Lhasa.

In addition, the day the weather cannot be used to represent the overall weather situation in Lhasa. According to the ambient air quality in Lhasa last year reached 364 days, the first three quarters of this year, air quality is 99.3%.

(Original title: weather: Lhasa not haze but dust over _fin)

(Edit: SN095)
December 21, 2013 China broadcast network
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气象部门称拉萨上空并非雾霾而是浮尘|拉萨|雾霾|浮尘_新闻资讯

　　央广网拉萨12月21日消息 据中国之声《新闻纵横》报道，这两天，拉萨市区的天气不太好，网上就有声音说，拉萨市区出现了所谓的"雾霾"天气，能见度不足五公里，造成了拉萨贡嘎机场多架飞机返航，有网友称"雾霭终于染指了中国最后一方净土"。

　　对此，气象部门最新回应表示，拉萨市上空出现的并非"雾霾"天气，而是"浮尘"天气。造成这次浮尘天气的原因主要是由于气温回升，温度梯度落差变大，冷暖空气在高原地区对峙，大风使干燥、疏松的地表形成扬沙、沙尘暴。

　　另外，对于"浮沉"天气不用过度担心，2007年1月中旬，2010年4月，当时全国绝大部分城市没有出现雾霾天气的时候，拉萨也都出现过浮尘天气。

　　此外，不能用一天天气好坏来代表拉萨市整体天气状况。数据显示，去年拉萨市环境空气质量优良天数达到364天，今年前三季度，空气优良率为99.3%。

(原标题：气象部门：拉萨上空并非雾霾而是浮尘_fin)

（编辑：SN095）
2013年12月21日08:26
中国广播网
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