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The author:(作者)delvpublished in(发表于) 2014/1/10 8:26:57 Windy day last year in Beijing at least for 62 years， low haze day precipitation increased
Legal evening news (Xinhua Zhao Yingyan) in 2013, the city's average temperature of 11.3 ° c, although close to perennial (1981), but the low temperatures in the first half, high temperatures in the second half due to less precipitation is widespread throughout the city, 508.4 mm of precipitation for the year, representing a small perennial 6.9%; windy days a year for one day only, at least for 62 years.
The legal evening news reporter learned from the municipal Meteorological Bureau this morning, 2013 climate bulletin released in Beijing, overall normal weather for the year, there were no major disasters.
Windy days the strike bulletin low haze day more
The weather bulletin, statistics on windy days as little as 40 words for, and its content is extremely interesting. Figures show that the 2013 Observatory there is only 1 day high winds than perennial (12.6), the ten-year average (7.8 days) significantly less, year for the lowest number since 1951.
According to the city's Climate Center senior engineer Chen Dagang introduction, this one year, "the only child" windy day on February 28, when high winds, strong dust weather in the city, the city's 20 meteorological stations there are 12 dust or sand weather station records, Chaoyang day maximal wind speed reached 20.2 mph.
And windy days is corresponding to the reduction, in 2013, the suburb Observatory there were 9 in fog, slightly less than the annual 13.1 days, but haze days increased considerably. While increasing the dust, a total of 12 days of the year and dust slightly more than perennial 10.1 days, with nearly ten-year average of 5.5 days compared with 2012 1 day significantly. At the same time, fall of 2013 now more dust accounted for 9 days, for the same period since 1961 up.
Experts less windy days due to cold air was too "weak"
City weather morning said Senior Engineer Zhang Mingying, windy day only 1 day, but it is also normal.
Zhang Mingying believes that the windy days here different from the weather forecast, refers to the instantaneous wind wind is greater than 17 meters per second, the equivalent of eight wind turbines. This windy biting cold-related activities, if cold air system is not strong, weak, and will not be able to produce such a strong wind.
Zhang Mingying, is decided by the strength of cold air due to wind, whereas cold air transit is still not expected in 2014 and therefore cannot be forecast for windy days number of days.
Low temperatures in the first half of the second half of the high
Figures show that the 2013 year-round average temperature of 11.3 ° c in Beijing, with perennial 11.4 ° c and nearly ten-year average 11.6 ° c, close to 0.3 ° c higher than 11 ° c slightly in 2012.
Judging from the year, seasonal differences still evident, seen from temperature, low temperatures in the first half, second half of the year tends to be high.
Combs the monthly mean temperature for the year can be seen from January 2013 to significantly low temperatures in April, especially in April, lower than perennial average temperature 11.2 ° c 2.4 ° c, is the second lowest April temperatures since 1981.
After entering the second half, first half of average temperature and sang "reversal".
Data show that from July to December, the mean temperature only in September and October than perennial low 0.2 ° c and 0.3 ° c, respectively, while the remaining 4 months to varying degrees too high.
In addition, the 2013 South Observatory at high temperature for 10 days, slightly more than 8.3 per cent on year round, these hot days are concentrated in July, 3 days late 4 days early, in July or August, continuous high temperature and muggy weather, making the city's water supply and electrical load connected to new heights.
Extreme maximum temperature 38.2 ° c, appeared in the July 24; annual extreme minimum temperatures of-14.1 ° c occurred on January 5.
Precipitation annual precipitation less than perennial 6.9%
From 2012, 2013 the city does not appear widespread heavy rainfall in city-wide, annual precipitation is 6.9% less than the perennial, belonging to the normal range. Overall, last year, a wide range of less precipitation, precipitation number of days was not much.
During the year, a 7-month low precipitation varying degrees of, December precipitation is zero, just 0.5 mm from the precipitation in November, lower than the perennial 90%.
According to meteorological experts, widespread heavy precipitation last year mainly concentrated in the first half of July month. Among them, the July 14 there have been process of annual maximum rainfall, averaging 58.1 mm of precipitation, rain level is reached. Southern Observatory occurred on July 8, the maximum daily precipitation, 84.2 mm.
In addition, the rainfall last year for 71 days, near-perennial 69.6 days levels, but the number of days of torrential rain for one day only, relatively low.
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Compared to "99"
Beijing heating and cooling "fast-shoot"
"1929 hands 3949; walking on the ice; 5969, riverine Willow; 79 River drive, eight or nine geese; 99 19 plus the cattle walk over and over. "This is the civil popular" 99 ", but careful people find Beijing's warm rhythms than" 99 "for half a month.
Today is "39" the next day, according to city weather forecast, today's highest temperature is 4 ° c, which is more than "3949 walking on ice," "39" was warmer. According to meteorological experts, Beijing belongs to the North, cold morning, warmer nights, than "99 songs" fast-shoot, about half a month in advance.
Historical data showed that Beijing "19" and "29" the perennial average temperature is-2.4 and-3.4 ° c, respectively. "Such temperatures are clearly not ' do nothing ', but rather ' on ice '. "Experts say on weather proverbs folklore, lot of people learned from practical experience, strong, when applied in practice, and should be tailored to the different characteristics of flexibility, should not blindly.
(Original title: windy days in Beijing last year, only for 62 years, meteorological experts say at least a day due to cold air was too "weak" haze and dust precipitation is less than the annual 6.9% for the same period increased considerably)
法制晚报讯 (记者 赵颖彦)2013年，本市平均气温为11.3℃，虽接近常年(1981年至2010年)，但上半年气温偏低，下半年气温偏高；由于全市大范围的降水过程较少，全年的降水量为508.4毫米，较常年偏少6.9%；全年大风天仅一天，为62年来最少。
《法制晚报》记者上午从市气象局获悉，北京地区2013年气候公报发布，全年天气总体正常，没有出现大灾。
直击公报 大风天数创新低霾天增多
在这份气候公报中，关于大风天的统计只有区区40字左右，而其内容却格外引人关注。公报显示，2013年观象台仅有1天出现大风，比常年(12.6天)、近十年均值(7.8天)明显偏少，为1951年以来最少年份。
据市气候中心高级工程师陈大刚介绍，这一个全年“独苗”大风天出现在2月28日，当天本市出现大风、强沙尘天气，全市20个气象站共有12个测站记录有浮尘或扬沙天气，朝阳站该日极大风速达20.2米/秒。
与大风天减少相对应的是，2013年，南郊观象台共出现9个雾天，比常年的13.1天略偏少，但霾天明显增多。同时增多的还有沙尘日，全年共有12天沙尘日，略多于常年的10.1天，与近十年均值的5.5天和2012年的1天相比明显偏多。同时，2013年沙尘日多出现在秋季，占了9天，为1961年以来同期最多。
专家分析大风天少缘于冷空气太“弱”
市气象台高级工程师张明英上午表示，虽然大风天只有1天，但也是正常现象。
张明英认为，这里所说的大风天与天气预报中的不同，是指瞬间风力大于每秒17米的大风，相当于八级风力。这种大风的产生与强冷空气活动有关，如果冷空气系统不强，比较弱势，就无法产生这种大风。
张明英称，由于大风天的产生是由冷空气强度决定的，而目前尚不能预计2014年全年的冷空气过境情况，因此无法预测大风天的天数。
气温上半年偏低下半年偏高
公报显示，2013年北京地区全年平均气温为11.3℃，与常年的11.4℃和近十年均值11.6℃都接近，比2012年的11.0℃略偏高0.3℃。
从全年情况来看，季节差异仍然很明显，而从气温上看，上半年的气温偏低，下半年则偏高。
梳理全年月平均气温可以看到，2013年1月至4月的气温明显偏低，尤其是4月份，11.2℃的平均气温比常年偏低了2.4℃，是1981年以来4月气温的第二低值。
进入下半年后，平均气温与上半年唱起了“反调”。
数据显示，7月至12月，只有9月和10月的平均气温比常年分别偏低0.2℃和0.3℃，其余4个月均不同程度偏高。
此外，2013年南郊观象台的高温日数为10天，比常年同期的8.3天略多，这些高温天集中在7月，其中上旬4天下旬3天，七八月份连续出现的高温闷热天气，使本市的供水量及电力负荷连创新高。
年度极端最高气温为38.2℃，出现于7月24日；年度极端最低气温为-14.1℃，出现在1月5日。
降水全年降水量比常年偏少6.9%
与2012年相比，2013年本市没有出现全市性的大范围强降水，全年降水量较常年偏少了6.9%，属于正常范围。总体来看，去年大范围的降水过程较少，降水的天数也不多。
一年中，有7个月的降水量不同程度的偏少，其中12月的降水量为零，11月的降水量仅0.5毫米，比常年偏少90%。
据市气象局专家介绍，去年出现的大范围强降水过程主要扎堆在7月上半月。其中，7月14日至16日出现了全年最大降雨过程，平均降水量为58.1毫米，达到暴雨级别。南郊观象台在7月8日出现了最大日降水量，达到84.2毫米。
此外，去年全年的降水日数为71天，接近常年69.6天的水平，但暴雨日数仅一天，相对偏少。
链接
相比“九九歌”
北京冷暖“快半拍”
“一九二九不出手；三九四九冰上走；五九六九，沿河看柳；七九河开，八九雁来；九九加一九，耕牛遍地走。”这是民间流传甚广的“九九歌”，但细心的市民发现，北京的冷暖节奏比“九九歌”快半个月。
今天是“三九”第二天，据市气象台预报，今天最高温度4℃，这比“三九四九冰上走”的“三九”显得更加温暖。据气象专家介绍，北京属于华北地区，冷得早，暖得晚，比“九九歌”快半拍，提前半个月左右。
历史数据显示，北京“一九”和“二九”的常年平均气温分别是-2.4℃和-3.4℃。“这样的气温很明显已经不是‘不出手’，而是‘冰上走’了。”专家说，民间流传的关于天气的谚语，很多都是老百姓从实践经验中总结的，地方性强，在实际应用时，应根据各地不同的特点灵活掌握，切忌盲目。
(原标题：北京大风天 去年仅一天 为62年来最少 气象专家称缘于冷空气太“弱” 同期降水量较常年少6.9% 霾天与沙尘天明显增多)
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