Questions tagged [meteorology]

The study of how the earth's atmosphere works, including weather forecasting. Use this tag for questions about the earth's weather. When asking questions specifically about the atmosphere, also include the [atmosphere] tag.

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21 views

improving image quality from AREA GOES imager data using WCT or other program?

I'm doing a project using two days worth of GOES 13 satellite data during June, 2016. I'm trying to make an HD animation using data from bands 1 and 4. I've been using the Weather & Climate ...
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137 views

Correlation of El Nino and south indian monsoon

A recent article in New Scientist reports the following claim made by Wenju Cai at CSIRO Melbourne. Southern India is having a lot of rain as it goes into winter, having come out of the dry ...
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90 views

Southern Hemisphere climate

Does oceanic and land mass positioning affect tropical storm evolution in the southern hemisphere? And, do cold fronts migrate latitudinally " upwards " the way they drift "downwards" in the northern?
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27 views

In a mesocyclone, why does wind shear create a horizontal axis of spinning air?

Take a look at this picture. Moist updrafts interact with highly-sheared upper-level winds, which sets up a horizontal vortex. But why? What causes the air to be forced downward and to the right, then ...
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77 views

What will happen if the Greek letter names were exhausted for naming tropical storms?

The traditional list of hurricane names for the year goes from A to W, and, in the very rare occurrence that the W storm has formed and there is another tropical storm out there, then the Greek letter ...
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29 views

wrf_chemi file with 30 time steps

I creat wrfchemi file for my wrf-chem, my wrfchemi file has 30 time step, frames_per_auxinput5 = 30, 30, auxinput5_inname = "wrfchemi_d", auxinput5_interval_m = 60, 60, ...
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32 views

What is the best way to calculate anomaly of meteorological variables with the (GFS/GEFS) forecast

To calculate the anomaly of a variable (temperature, for example) I need the climatology (at least 30 years) of that variable. Which climatology data source should I use? Should I use the "...
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49 views

Lightning categorization of a high-speed “ball” of light

While driving behind the back side of an intense thunderstorm, I saw a lightning phenomenon I haven't seen before - just a bright blueish light at high speed, following an erratic path, just like the ...
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24 views

Noise level estimation using Hildebrand & Sekhon method

I have some data from a radar to process in order to find the moments and in turn the wind speeds. I have no prior knowledge in signal processing so it's giving me a hard time to estimate the noise ...
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51 views

Why some area in the ocean seems to have like “wind barrier”?

When looking at the earth wind map, some lines clearly distinguish themselve and act as "frontier" between stream of wind. I was wondering what it was and what was causing them? Thanks.
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62 views

How does the changing seasons affect the large scale easterly flow of the ITCZ?

I am new to climate science and have been learning the basic picture of the intertropical convergence zone (ITCZ) and how this leads to the predominant easterly "trade winds". The picture that I ...
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33 views

Effect on climate of the Earth’s rotation was a week instead of 24 hours

Cross-posted in Worldbuilding. Curious what the affects on daily temperatures and climate would be if the Earth had a slower rotation, say 84 hours of light and 84 hours of darkness. How extreme ...
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69 views

If its ice sheet were removed under modern atmospheric conditions, what climatic and ice-sheet equilibrium would be re-established over Antarctica?

Note the use of the term removed instead of melted—as in, any excess water is moved to where it can't cause trouble, either through the use of advanced technology (space elevators, et cetera) or for ...
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42 views

Digital alternative to hand analyzed maps

I am a staunch believer in the benefit of hand analyzing maps to get a good feel for the state of the atmosphere before getting into my forecast. With Covid-19 keeping us out of the office, one of the ...
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81 views

How can I do cdo remapbil

Can anyone to help me? I am trying to use this command to interpolate my netcdf data into my wrfinput_d01 . I have used this: ...
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77 views

At what distance from a location does the average monthly climate significantly start to differ?

I am almost done creating an app that allows people to create a planting calendar based on garden journals created by people who live within a certain radius of a user. In those garden journals people ...
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46 views

What is the reason for this high outdoor VOC level with strange pattern of slow rise and sudden falling?

I have an Atmotube Pro air quality sensor placed outside in a cup with a large bowl placed over the top of it to protect it from the wind and any rain but to allow air to filter through easily. I'm ...
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139 views

Equatorial Bulge and its implications on the climate

How much of the variance in the climate is due to the equatorial bulge and how much sun radiation do we lose due to the equatorial bulge? I am interested in the variance both through time and ...
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61 views

Short-term forecast of Europe by using synoptic charts

I should make a short-term forecast of Europe by using synoptic charts. I'm finding it really hard so I'd be glad if you help me. 'В' means high atmospheric pressure I'm trying to figure out the ...
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28 views

Is there any program that gives you air temperature (and precipitation) information if you feed them the date and location (latitude,longitude)?

I know I can google each data point (latitude, longitude, date) one by one and find if the government of that country has archived past weather information. But this will take infinite amount of time ...
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40 views

Question about the physics of hurricanes

I've a basic misunderstanding about the formation of tropic cyclones. From the absolute point of view, cyclones form in order to conserve total angular momentum - air masses at different latitudes ...
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50 views

Thermal likelihood formula

Background: I use the X-Plane flightsimulator for flying and gliding. In the program we have real weather (clouds, winds, etc...) but thermals are not well implemented, they don't have any connection ...
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100 views

Does this weather pattern have a name?

The past few weeks of spring in northern Ohio I believe I have noticed a weather pattern where the weather forecast will show a string of days with rain, but what happens is the day is mostly clear, ...
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147 views

Modification of an air mass

If an air mass that exists in North America starts moving south west or south east what kind of modification will affect it and how would you characterize it in it's final state? My answer is that it ...
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45 views

Topography and flash flooding

I'm looking for a study or document showing the effect of the topography, slopes, the sea level and the tide on flash flooding occurrence. Thanks in advance
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70 views

Figuring out the temperature at the tropopause

Either I am misunderstanding something, or reading conflicting information. Likely the former. First off, the tropopause is defined as the boundary between the troposphere and the stratosphere. That ...
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102 views

How can I convert a CERA-20C total precipitation dataset of "monthly means of daily means' (edmo) to mm/month?

I downloaded an edmo dataset of 1 ensemble of the cera-20c model. I want to convert these data, which are in [m], to mm/month. Further specifications: 0.125/0.125 grid, -29/30/-30/31 area. Example of ...
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106 views

how to calculate the average moisture flux over a period of time

I wanna calculate the average moisture flux over a period of time. For example the average moisture flux over an entire summer. I don't have a meteorological background. I have a conceptual confusion ...
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31 views

How to create Indonesian environmental conditions in India?

Need to create and maintain Biofloc for fish farming in India, it's really successful in Indonesia and I believe it's due to environmental conditions. Can we replicate the same in India?
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56 views

How to calculate water vapor budget for a selected region in GRADS or MAT Lab

I need to calculate water vapor budget for a selected region. Can anyone suggest a specific link or code for the above mentioned tools please. I have seen a link for NCL but i am not familiar with ...
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29 views

what changes in the weather prior to thuderstorms?

What changes in the weather prior to thunderstorms (day before, for example)? It seems humidity goes up and temperature but is there anything else?
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49 views

What is the most powerful kind of extratropical cold core cyclone and why?

I want to understand what makes for a very strong extratropical cyclone. So which kind on Earth is the strongest in terms of windspeed or pressure? Southern ocean storms, nor'easter, European wind ...
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66 views

Can cloud seeding make a much hotter summer, at a middle latitude, at the area that receives less water than expected?

My country, Spain (40ºN), receives clouds from the Atlantic Ocean during the summer. Our most visited beaches are on the Eastern coast, which sits on the Mediterranean Sea, there is typically more dry ...
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77 views

Plotting moist static energy fluxes

I'm trying to plot Moist static energy fluxes (vectors) and their divergence like the attached Figure. I have monthly means of u, v, temperature, specific humidity and geopotential from(1000-100 hPa) ...
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36 views

Is there a conventional name for when wind speed increases as a result of a large descending air mass?

I remember reading a long time ago in a meteorology book that certain dust storms were caused by a rapid descent of a large air mass. As the air is pressed against the ground, it is forced to spread ...
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59 views

Correlation between temperature and precipitable water in the tropical climate

Air temperature is known to correlate well with precipitable water at higher latitudes. What are the likely factors that degrade the correlation in the tropical monsoon climate?
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19 views

Is there such a thing as virtual barotropic?

In meteorological terminology within dynamics, there are usually one of two unique assumptions made: Baroclinic- density is a function of both temperature and pressure : $\rho(x,y,z,t)=\frac{P(x,y,z,...
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256 views

Calculation of apparent heating (Q1) and apparent moisture sink (Q2) as defined by Yanai et al. (1972) using NetCDF data?

Please can anyone explain how to calculate apparent heating (Q1) and apparent moisture sink (Q2) as defined by Yanai et al. (1972) using NetCDF data? Please kindly check equation 6(Q1) and 7(Q2) of ...
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83 views

Missing Data in GSOD Data

I been accessing daily historical NOAA GSOD data through Google BigQuery. I am interested in long term time series of snow, precipitation, and to a lesser extent temperature for areas around the Volga ...
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108 views

Pileus / velum & altocumulus / altostratus - classification problems

I have a lot of free time and often observe and take photos of the sky. Along with that, I always try to figure out what exactly I saw. I think that I have the basic understanding of clouds and cloud ...
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615 views

Jet stream core

Why on a Polar Front Jet Stream does the core form on the tropical (warm air) side and not on the polar (cold air) side? Thank you in advance.
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365 views

What is a weather system?

I heard on Star Talk Radio that Jupiter has weather systems larger than Earth so I was just curious to know what the definition of a weather system is exactly.
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359 views

Why is lightning going from the Earth to the clouds while the electrons are going from the clouds to the Earth?

The lightning is often a discharge in advance. The (negative) charge slide occasionally a little further on in the conductive channel, wherein said channel is highlighted each time something. The ...
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Question on the derivation of a prognostic equation for the mean concentration (Assume horizontal homogeneity in X)

In deriving the prognostic equation for the mean quantity of pollutant C, as shown in my solution below: Am I right in that I do not need to separate T (temperature) into its mean and turbulent parts ...
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16 views

Vertical air speed

Assuming that the divergence varies linearly with the pressure between the surface (1000 hPa) and the tropopause (200 hPa). Can someone tell me how do we calculate the vertical speed on the pressure ...
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1answer
31 views

Can a Humidity Differential move PM2.5 Pollution?

Observations There is a higher level of PM2.5 pollution outside of the house. Readings are in the 80-150 range due to wildfires. (PM2.5 levels determined by sensors in PurpleAir.com's sensor network) ...
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1answer
71 views

How to measure voltage differential across different altitudes

Imagine two points, one directly above the other ( Point A - 10,000 feet (PA) Point B - 20,000 feet (PB) Imagine there's voltage potential between those two points Q1: How could you measure the ...
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38 views

Tropical cyclones in North Indian Ocean in winter

The North Indian Ocean basin which consists of Bay of Bengal and Arabian Sea witnesses mainly two tropical cyclone seasons: pre-monsoon and post-monsoon. My question is that what is it that causes the ...
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1answer
91 views

Why are there both climate regions from axial tilt and weather cells?

So Earth has an axial tilt and that creates weather regions. For example, approximately 23 degrees north and south, approximately the same as the planets axial tilt, will give you the tropics. This ...
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58 views

Providing Edgar emission using prep_chem_source for tracers (CO2-CH4)

I am working on CO2 and CH4 by WRF-CHEM, for providing my anthropogenic emission from Edgar data base, I'm going to use the Prep_chem_source App. I would like to use Edgar data emission (as my ...