# Tag Info

Accepted

### Predicting rock type from seismic processing

This is a ginormous question; a complete answer is probably worth an MSc in exploration geophysics. But I can try to give some pointers for places to find out more. Preface: in general, considering ...
• 11k

### What meteorological features accompany/cause a thermal inversion?

A thermal inversion is defined as when the temperature of the air increases with height. By default, there always exists an inversion at the tropopause due to the exothermal Chapman cycle. But let's ...
• 8,799
Accepted

### Seismic inversion: High-Frequency approximation

The propagation of seismic waves is described by the wave equation: $$\mathrm{\nabla \cdot \sigma = \frac{\partial ^2 u}{\partial t^2}}$$ Where $\sigma$ is the stress and $u$ is the displacement. ...
• 2,211
Accepted

### How to estimate altitude of tropopause of other planets?

The existence, and accordingly the height, of a tropopause depends on whether the other planets' atmosphere has a layer of ozone or any other gas that absorbs some part of incoming solar radiation ...
• 370

### Do surface temperature inversions only occur in valleys and natural bowls?

Valleys and basins make surface temperature inversions (STI) easier to form and harder to disperse. However, an STI is the result of warm air sitting above colder air can form independently of ...
• 2,813
Accepted

### What is trace-based seismic Inversion

I too have found this nomenclature rather confusing. I am pretty sure that trace-based inversion is merely where each seismic trace is inverted independently of surrounding traces. This would take ...
• 1,044

### How do we convert the seismic trace wavelet to zero phase which is in mixed phase?

It depends on what your starting information about your seismic data is. For example, if you know that your data contains an impulsive (minimum phase) source wavelet (i.e. the acquisition source was ...
• 947

### Difference between model parameter and observable parameter

Inverse problems deal with creating theories based on observed data, as opposed to making predictions about the real world based on existing theoretical models, so the "results of the measurement of ...
• 4,260
Accepted

### Post-stack seismic impedance (and amplitude) inversion confusion

Here is the figure in question: "Traveltime inversion" is a very broad category that includes any inverse problem where the input data is a time-delay from a seismic source impulse to when it is ...
• 947
1 vote

### Why does a temperature inversion act like a lid?

Less dense air tends to rise; in general, how much the atmosphere cools with elevation (in addition to humidity differences) drives a difference in density, and if that difference is larger than the ...
• 776
1 vote

### Do surface temperature inversions only occur in valleys and natural bowls?

One other possible source of surface temperature inversions involves bodies of water. On an unusually warm spring day in, let us say, Chicago, the air temperature is inherently warmer than the ...
• 3,831
1 vote
Accepted

### Definition of Surface-based atmospheric duct

Both situations are possible. Normally, the atmosphere gets colder and more rarefied with height, and cold air holds less moisture than warm air. Inversion layers trap the lower air mass closer to the ...
• 4,711
1 vote

### Why during subsidence inversion, upper layer warms more than lower layer?

I assume that the sentence in the book mainly refers to subsidence as an adiabatic process. This sinking motion has a maximum which is at a height well above the surface, simply for the reason that ...
• 407
1 vote
Accepted

### DC component: Seismic inversion

The impedance inversion problem asks: "Recover acoustic impedance from seismic reflection waveforms". The forward modeling procedure from acoustic impedance to seismic reflection waveforms involves ...
• 947
1 vote
Accepted

### Amplitude scaling in seismic inversion

You can think of this amplitude term as being part of the wavelet term such that your definition of the wavelet is: "the necessary filter/operator to convert true reflectivity into the arbitrarily ...
• 947

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