Unanswered Questions
304 questions with no upvoted or accepted answers
26
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0
answers
520
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Is it possible for a sting jet to form over a continental landmass?
Sting jets are thought to be responsible for some of the most damaging winds associated with extratropical cyclones in the mid-latitudes. So far they have only been confirmed in the European region, ...
14
votes
0
answers
197
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Will global climate change alter the interannual and/or intraseasonal variance of temperature and/or precipitation?
A quick skim of the regional chapters in AR5 shows predicted changes to average temperature and precipitation. If I understand (in rough terms) the modelling methodologies used, a variety of models (...
13
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0
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103
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How are scatterometer observations standardised before being fed into reanalysis models?
This very basic question occurred to me during a talk on reanalysis data sets. Often we know the observations produced by a particular instrument, say rain radar, are biased from one year to the next ...
12
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0
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152
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Is there a distinction between gap winds and channelled flow?
I have seen gap flows mentioned in the literature, for example [Gohm et al. 2004, Zängl 2002, Mayr et al. 2007]. Whiteman 2000 defines a gap as a "major erosional opening through mountain ranges" and ...
10
votes
0
answers
299
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What is the smallest grid spacing that Eulerian air quality models should use?
华盛顿大学的先进Research Weather Research & Forecasting (WRF) model in predictive mode, and then tests the skill of the model anywhere from 12 - 84 hours out from ...
10
votes
1
answer
7k
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What is the loudest thunder ever recorded (dB) at ground level and where did it occur?
Sound travels fastest through warm air and conditions such as temperature inversions can help to amplify the sound of thunder (source). Conversely, during a thundersnow event the falling, and ...
9
votes
0
answers
103
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Was this spherical device used in weather forecasting in the 1960's?
The New York Times obituary Robert M. White, Who Revolutionized Weather Forecasts, Dies at 92 shows the image below. It looks like it might be a model of the Earth but I can't tell for sure. Can the ...
9
votes
1
answer
457
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What is the difference between the freezing level and 0 C isotherm in NOAA's GFS?
I'm playing around with NOAA's GFS forecast data and I see that it contains both a "0 °C isotherm level" and a "Highest tropospheric freezing level". Could someone tell me the ...
9
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0
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150
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What meteorological factors contribute to springtime Trans-Pacific air-pollution events?
The transport of tropospheric ozone, ozone precursors, carbon monoxide, etc from Asia to North America is an active area of research (see J.L. Ambrose, et al., 2011) These types of events occur ...
9
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0
answers
152
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Relation of El Niño to Monsoons
Scientists are forecasting a weak to moderate El Niño event to emerge in the coming months, what causes this to happen? Once developed, how will the El Niño conditions effect progressive monsoon ...
8
votes
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74
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By how much did the Earth's diameter decrease due to cooling, if at all, since it was formed?
The answer to How long until Earth's core solidifies? question cites an estimation that the Earth (as a planet, not the surface of it) has cooled down by about 250K since it was formed. The question ...
8
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110
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全球天气地图数据库
I am searching for a database (a free one would be great) that would give me, for any chosen rectangular area on earth, historic data about pressure, sea water temperature, wind (including both speed ...
8
votes
0
answers
445
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Calculating Monthly Accumulation value of the Clearness Index KT
I have an hourly data file of a particular location which contains the following variables (extracted from the Meteonorm7.0 data base, for a typical one year of data): GlobHor (W/m2): Horizontal ...
8
votes
1
answer
139
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Is there any link between the weekly human cycle and weather?
I am interested in the linkage between the cyclical timing of human activity, and whether that has a direct affect on weather. Most obvious to me is the weekly cycle, which is observed by most of the ...
7
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51
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Was the Earth a lot foggier millions of years ago?
Quoting a sign in Redwood National Park: Redwoods once covered large expanses of the world. Millions of years ago some of these redwoods were preserved as fossilized trees when volcanic ash buried ...