recentpopularlog in

aries1988 : meteo   39

来自上海的同学 ... - 惠明的广播 - 豆瓣
惠明的豆瓣广播:来自上海的同学第一次洗衣服晾了半个小时就欣喜若狂地穿上说干了干了伯京老灵的。我说没干,他们坚持说干了,我让他们摸摸我的衣服,他们说这个干过头了。
shanghai  fun  beijing  weather  anecdote  meteo 
10 weeks ago by aries1988
Two Days of Weather Predicted in Just 20 Minutes in SC18 Demo | NVIDIA Blog
Behind the scenes, the GPU-accelerated COSMO model was running on a domain from the Swiss Federal Office of Meteorology and Climatology, known as MeteoSwiss, with enormous computing requirements. A 24-hour forecast created using the COSMO-1 model requires more than 4 quadrillion computing operations. COSMO-1 forecasts are initiated eight times a day, every three hours.

The demo’s visualization is further supported by using ParaView, an open-source visualization tool recently enhanced with ray-tracing capabilities using NVIDIA OptiX to take advantage of the latest NVIDIA Turing GPUs, including the Quadro RTX 6000.
gpu  meteo  weather  tesla 
december 2018 by aries1988
Intempéries : le métro parisien transformé en piscine géante après des pluies diluviennes

Un cumul record de pluie a été enregistré à Paris dimanche 9 juillet au soir, avec 49 millimètres en une heure. C’est l’équivalent de trois semaines de précipitations moyennes en juillet dans la capitale, selon Météo France. Le précédent record, de 47 millimètres, remontait au 2 juillet 1995.
numbers  meteo  paris 
july 2017 by aries1988
Vamei - 博客园
Vamei
编程,数学,设计
blog  chinese  meteo  python  geek  history 
june 2017 by aries1988
Letter of Recommendation: Talking About the Weather
“New York City gives you like one week of spring and one week of autumn,” I said, employing one of my go-to weather observations while the milk steamed. “We get one week of bearable weather on either side of too-hot summer and too-cold winter. Doesn’t seem fair.” The barista looked up, seeming a little stoned, as baristas can tend to seem. “Yeah, that’s New York all right,” he said. “But that’s how we know where we are.”
meteo  newyork  usa 
may 2017 by aries1988
Le Japon, nouvel eldorado blanc

Une texture inégalable qu’analyse le Suisse ­Samuel Anthamatten, guide de haute mon­tagne et skieur professionnel : « La qualité de la neige japonaise est unique. Humide, puisque ­proche de l’océan, elle reste pourtant très agré­able à skier car il fait froid. » En station, l’hiver, les thermomètres oscillent entre – 5 °C et – 20 °C. « Pour imager, poursuit-il, si je com­parais la neige de chez nous à du yaourt, alors celle du Japon se rapprocherait de la crème ­chantilly ! »

L’Archipel, qui détient le ­record (méconnu) mondial du nombre de stations de ski (573), bénéficie de forts vents froids en provenance de la Sibérie et de la Chine qui soufflent sur la mer chaude du Japon. De leur ­rencontre naissent les précipitations responsables de ces impressionnantes chutes de neige.

La neige promise se savoure dans les innombrables ­forêts, plus ou moins denses, offrant l’occasion de skier entre les pousses de bambou. « Ce ne sont pas les terrains les plus techniques que j’aie connus, mais le ski entre les arbres reste très joueur », analyse Slemett. Sur les pistes, les distributeurs automatiques de canettes chaudes et les télésièges monoplaces ou démunis de garde-corps peuvent surprendre les Occidentaux.

L’esprit freeride des pionniers japonais semble de nouveau planer sur les montagnes blanches du pays du Soleil-Levant.
ski  japan  meteo  geography  snow 
february 2017 by aries1988
Catastrophic Chinese floods triggered by air pollution
Fan worries that such effects are not being taken into account in weather forecasting. In China, for example, she notices that forecasts often give the wrong area for thunderstorms, which are likely to be downwind of where expected. Such forecasts also get the intensity “worryingly wrong,” she says.
pollution  meteo  china  model  disaster 
july 2015 by aries1988
科学松鼠会 » 当下的酷暑,一支失衡的舞蹈
由于地球自转和地球曲率,大气对流层中会产生尺度与地球半径相当的行星波。这类波动会将扰动以波列的形式从一个地区向另一个地区传播。
instapaper_favs  meteo  explained 
august 2013 by aries1988
Europe to be battered by Sandy-style superstorms - environment - 29 March 2013 - New Scientist
They found that future hurricanes formed further east in the tropical Atlantic, as that area had warmed sufficiently to provide enough heat and moisture to power them. As a result, many didn't hit the US and instead struck western Europe. The storms weakened once they left the tropics, but powered up again when they entered cold and windy areas, becoming hybrid storms like Sandy, halfway between winter storms and hurricanes.
europe  future  meteo 
april 2013 by aries1988
To understand how subsidence inversions form
A typical vertical profile of temperature associated with smog episodes includes a subsidence inversion on the eastern flank of a high-pressure system, where the air is sinking from the upper troposphere to roughly 850 mb. To understand how subsidence inversions form, I recommend you carefully go through this instructive flash animation, courtesy of Penn State's certificate program. At any rate, subsidence inversions act like a lid, preventing air below the inversion from mixing upward.
flash  meteo  explained 
january 2013 by aries1988
From the Lee Side : Newsworthy Smog in Beijing | Weather Underground
There was a temperature inversion in the lowest layer of the atmosphere and a roughly isothermal layer above it, making the lower troposphere highly stable and thereby trapping low-level pollution. Courtesy of NOAA.
http://www.instapaper.com/read/355216186
meteo  explained  pollution  beijing 
january 2013 by aries1988
Why All Hurricanes Look the Same from Space
Every satellite photo of a hurricane looks a lot like the last one. The images above, taken with NASA Goddard Spaceflight Center’s MODIS instrument aboard the Terra and Aqua satellites, are a case in point.
http://www.instapaper.com/read/319438183
analysis  typhoon  meteo 
september 2012 by aries1988
和中国相同纬度的国家,冬天人们也一样穿这么厚吗? - 果壳问答 - 果壳网 guokr.com
和上海接近的城市包括仙台、德黑兰、雅典、波尔多、都柏林、亚特兰大与西雅图等,显得更适合人类居住。
meteo  city  life  comparison 
august 2012 by aries1988
在台风中引爆核弹会怎样?
http://www.aoml.noaa.gov/hrd/tcfaq/C5c.html

先说冲击波。50 万吨级核弹的有效杀伤半径约为 5.5 公里,爆炸产生的冲击波有把云层吹散的可能性。这 5.5 公里的半径虽然不小,但相对于台风 400~1000 公里的直径而言实在是九牛一毛,甚至连直径 10~70 公里的台风眼也不一定填得满。

即使考虑一个中心眼直径较小的台风。爆炸造成的冲击波的确会造成瞬间的高压,但是爆炸过后压力瞬即恢复正常,也就是说冲击波本身并不会造成大气压的改变,只有爆炸放出的气体才有可能影响气压。填满一个台风眼需要多少爆炸气体呢?我们知道,正常情况下大气压强大约是 101 kPa,而台风眼里的气压可以低至 90 kPa,也就是说每平方米上方需要补充 1 吨质量的气体。有人计算过,要将一个台风眼直径为 20 公里的五级飓风减弱成二级飓风的话,需要填入5亿吨的气体 [1]_ ,根据质量守恒定律,这至少需要一颗自重 5 亿吨(而非当量),且能够完全气化的炸弹。显然这样的炸弹至少目前是不存在的。

而热辐射在这里是帮倒忙的。因为台风可以抽象为一个大型的对流复合体:受热的海面不断提供蒸汽,在上升的过程中液化并放出潜热,从而推动台风的发展 [3]_ 。如果这个时候台风眼所在的海面附近引爆了一颗核弹的话,蒸发的水反而对台风起着推波助澜的作用。当然我们可以在高空引爆核弹,减小台风上下的温差以减轻对流,但是这样做实在是杯水车薪 [1]_ 。
science  sf  typhoon  nuke  numbers  meteo 
march 2012 by aries1988
人人都是天气专家:亲自预报几点几分下雨!
推而广之
  在珠江三角洲的朋友可以使用香港天文台的雷达资料(ªªhttp://www.weather.gov.hk/wxinfo/radars/radar.htm),而在其他地区的朋友使用国家气象中心的雷达数据汇总(http://www.nmc.gov.cn/publish/radar/beijing.htm)或是中国天气网的天气雷达页面(http://www.weather.com.cn/static/radar_video_v1.php?class=JC_RADAR_CHN_JB),有包括全国各省、市、区的数十台气象雷达的实时观测资料,非常给力!ºº

  这种“雷达估计法”可以估计未来1-2小时内的降雨情况,一般预报未来半小时到一小时以内的情况最为可靠。当然,有些时候难免给老天戏弄,比如我刚开始玩的时候曾沾沾自喜地提前两个半小时向朋友发出暴雨预警,然后看着雨云渐行渐弱,最后滴雨未降,结果被朋友看了笑话。然而,只要能熟练使用,同时掌握不同季节、不同天气系统下的雨云移动和发展规律(这需要积累一定经验,同时对气象学概念有一定的了解),可以做到十发九中以上,不仅能有效避免成为“落汤鸡”,同时还可以装扮甚至直接成为科学青年大军中的一员。退一万步来说,这也是个极其有趣的游戏,猜中了不仅能获得极大的自我满足感,而且也很有实用价值哦。总之,“人人都是天气专家”游戏火爆上线,永不删档,谁玩谁知道!欢迎各位马上去刷国家气象中心或者香港天文台的雷达页面吧!
meteo  forecast  diy 
june 2011 by aries1988

Copy this bookmark:





to read