Questions tagged [atmosphere-modelling]

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8
votes
0answers
200 views

Modeling swirling storms

I'm looking to demonstrate the rotational behaviour of swirling storms with a numerical simulation. So far it includes pressure-gradient, Coriolis acceleration, frictional forces and the acceleration ...
7
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116 views

Shallow water height as vertical coordinate

In atmospheric physics we use often a variety of vertical coordinates, $z$ the height above some reference surface, or $r$ as distance from the planetary center. However sometimes it simplifies the ...
6
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0answers
78 views

Spatial variability in ocean surface winds

For the near-surface winds over the ocean, many model products and satellite footprints have spatial resolutions on the order of tens of kilometers. I'm interested in knowing how much the winds (both ...
5
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0answers
143 views

Is there a reconstruction of paleoclimate sea level air pressure?

In paleoclimateology graphs of both temperature and atmospheric composition versus time are common. Where can I find a reconstruction of sea surface pressure versus time? I have found one paper that ...
5
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96 views

Dig in the rationality of model evaluation of WRF with land-based station data

I use WRF (Weather research and forecasting) model for in regional scale meteorology simulation. And then, the WRF output files will be deemed as criterial input data applying for chemical transport ...
5
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0answers
123 views

Forced shallow-water equation with diabatic heating as the source term

How to obtain the divergence of velocity field $\left(\nabla.\mathbf{u}\right)$ with ${Q}$ (something proportional to the diabatic heating rate) as the source term from the thermodynamic equation? ...
5
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0answers
188 views

Bulk and dynamic viscosity in the atmosphere

I'm studying the physics of the atmosphere but I'm struggling with the matter of viscosity (Navier-Stokes equation) for gravito-acoustic waves. From Landau-Lifschitz : $$ (T)_{ij} = -p\delta_{ij} + \...
4
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227 views

How to transform the inventory data from degrees to kilometers

First all, my question was different from the question Converting grid resolution from degrees to kilometers. In chemical transport modeling, the pollutant source inventory was an essential input ...
4
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0answers
85 views

Physics based circulation models

How useful are physics based models when considering circulations at synoptic scales? Are they useful? Can we not make predictions, observe trends based on data alone? I am studying A.E.Gill's model ...
3
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0answers
117 views

Conversion of an NWP model into climate model

I am wondering if anybody has an idea about the difference between regional climate models and numerical weather prediction models that are run at the same domain. I have a basic idea that the ...
3
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0answers
43 views

What does this reference velocity refer to? (Atmosphere-Ocean Momentum Exchange)

The above image is taken from "Atmosphere–Ocean Momentum Exchange in General Circulation Models", John A.T.Bye 1999. It represents the inertial coupling concept between the atmosphere and ocean. It ...
3
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0answers
61 views

Equation for Atmospheric Pressure Tide

Using Pressure sensors - I found out that there is a daily pressure wave-like pattern with peaks at 9:00 & 21:00 (local time). I want to construct an equation to explain this phenomena, probably ...
3
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0answers
89 views

Correlation analysis with primary air pollutants and secondary formed ozone

The Ph.D dissertation Assessment of air quality in Northern China by using the COSMO-ART model in conjunction with satellite and ground-based data which was written by Stefanie Schrader in KIT German....
3
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0answers
170 views

Pasquill-Gifford stability class data for one station

On my project, Stability classes is an useful tool to analysis the weather condition for one place. Using R Package Worldmet, I can get the hourly weather ...
3
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0answers
2k views

How to convert eta level to pressure level in WRF model

I am working WRF outputl file and require to extract wind and temp values at 850 hPa, 700 hPa and 500 hPa pressure levels. As the WRF vertical coordinates are based on eta level, I am having trouble ...
3
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0answers
86 views

Is the number of high/low pressure regions different at low pressure levels at high pressure levels?

Is there a higher number of mid-latitude high/low pressure regions at 850 mb, as compared to the number of high/low pressure regions at 200 mb? And if so, why?
2
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19 views

Rainfall Frequency Analyses

I have monthly precipitation data and would like to create the frequency curve for the 2, 5, 10, 100 year storms. I have access to NetStorm, STORMS 2000, CFA (from Environment Canada) and HEC-SSP. ...
2
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0answers
77 views

Importance of surface boundary conditions in a weather model

I have a question regarding the usage of SST values for simulating a real time event such as a tropical cyclone. I feel that I should use the most updated SST values in order to get the accurate ...
2
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0answers
48 views

Internal energy, enthalpy, and work in the atmosphere

I'm writing a toy radiative-convective atmospheric model and need to relate the heat flux convergences (either surface sensible heat flux or the radiative flux) to changes in atmospheric layer ...
2
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0answers
53 views

The difficulties for the simulation of atmospheric metals

Atmospheric metals usually reside in aerosols with complex source origins. The concentrations distribution of metals especially for those with high toxicity (Pb, Cd, Ni, V) should be informative for ...
2
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0answers
44 views

NaN values of aerosol variables in KF/Kuo parametrization schemes

I am using the numerical weather prediction (NWP) model RAMS to simulate a Tropical Cyclones in BoB region. I made two setups with two Cumulus Parametrization schemes (Kuo and KF). Initial and ...
2
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0answers
46 views

What would be characteristic time of the escape of an 1atm air (or oxygene atmosphere) from the Moon?

(related question) I am thinking on the Moon if it would have an oxygen atmosphere. What would be the characteristic time of its escape? Although the Moon has a much lower escape velocity as the ...
2
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97 views

Numerical methods for solving shallow-water equations with a source

What are the numerical methods used for solving shallow water equations (PDEs) with a mass source, at the synoptic scales of the atmosphere, if I have a finite east-west boundary (may be periodic wave ...
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33 views

How to transform level 2 satellite retrievals to level 3 gridded data

Usually, I use level-3 gridded satellite data to analyze the spatial and temporal patterns of atmospheric compositions. However, there were some data sources which only afford level 2 product. For ...
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0answers
30 views

How to control output precision when running WRF?

I am very new in this area and wondering if anyone can answer my following questions: I am running WRF (4.0.3, ideal) to study rounding and truncation. I use the NCL (6.5.0) print command to access ...
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0answers
33 views

Seeking CMIP5 or CMIP6 globally in .nc format

Is there in some ftp storage, a pre-processing CMIP5 data for direct download in netcdf extention?
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0answers
20 views

CALPUFF dispersion model - orography

Is it possible to use CALPUFF in ISC-type single-station mode accounting for "simple" terrain effect (like in ISC)? Can I set the orography out of CALMET?
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0answers
84 views

What would happen to the Subtropical Ridge/Horse latitudes and Polar front if the Earth was rotating 5% faster?

Would they move towards the Equator/Poles? Stay in the same place? What about if the Earth was rotating 10% slower? Is there a rotation speed for Earth which will lead to 4 wind belts instead of 3 ?
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418 views

SIGINT error WRF

I am trying to run WRF 3.8.1 using ncep2 but after a while the run stops and I get following error: ...
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42 views

What is difference between an atmospheric model and a climate model?

I am wondering the major differences been an Atmospheric model and a Climate model? For example, Regional Atmospheric Modeling System (RAMS) versus Regional Climate Modeling System (RegCM). I recently ...