https://github.com/pankajkarman/pyvortex

Equivalent Latitude and polar vortex edge calculation using Nash criteria
https://github.com/pankajkarman/pyvortex

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Equivalent Latitude and polar vortex edge calculation using Nash criteria

• Host: GitHub
• URL: https://github.com/pankajkarman/pyvortex
• Owner: pankajkarman
• License: mit
• Created: 2020-05-31T20:38:59.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2021-08-04T05:24:32.000Z (about 3 years ago)
• Last Synced: 2024-04-27T00:02:22.304Z (5 months ago)
• Language: Python
• Size: 16.9 MB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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• open-sustainable-technology - pyvortex - Equivalent Latitude and polar vortex edge calculation using Nash criteria. (Atmosphere / Atmospheric Composition and Dynamics)

README

        
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### About

The module `pyvortex` consists of functions to calculate the [equivalent latitude](https://journals.ametsoc.org/doi/citedby/10.1175/1520-0469%282003%29060%3C0287%3ATELADT%3E2.0.CO%3B2) and edge of a polar vortex using [Nash criteria](https://agupubs.onlinelibrary.wiley.com/doi/10.1029/96JD00066).

### Installation

```

pip install pyvortex

```

install the latest version using 

```

pip install git+https://github.com/pankajkarman/pyvortex.git

```

## Documentation

Latest documentation is available [here](https://pankajkarman.github.io/pyvortex/).

### Usage

`pyvortex` is easy to use. Just import:

```python

import pyvortex as vr

```

#### Northern Hemisphere

Instantiate the `PolarVortex` class using: 

```python

pol = PolarVortex(pv, uwind)

```

Get equivalent lqtitude for the provided vorticity data as:

```python

eql = pol.get_eql()

```

If you want to get both equivalent latitude and Vortex edge, just use:

```python

eql = pol.get_edge(min_eql=30)

```

Example:

![Arctic Vortex](./example/arctic_polar_vortex_20110201.gif)

#### Southern Hemisphere

Flip pv and uwind along latitude dimension and multiply pv by -1. All other things will be the same.

Example:

![Polar Vortex](./example/antarctic.gif)