lcl¶
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metpy.calc.
lcl
(pressure, temperature, dewpt, max_iters=50, eps=1e-05)[source]¶ Calculate the lifted condensation level (LCL) using from the starting point.
The starting state for the parcel is defined by temperature, dewpt, and pressure.
Parameters: - pressure (pint.Quantity) – The starting atmospheric pressure
- temperature (pint.Quantity) – The starting temperature
- dewpt (pint.Quantity) – The starting dew point
Returns: (pint.Quantity, pint.Quantity) – The LCL pressure and temperature
Other Parameters: - max_iters (int, optional) – The maximum number of iterations to use in calculation, defaults to 50.
- eps (float, optional) – The desired relative error in the calculated value, defaults to 1e-5.
See also
Notes
This function is implemented using an iterative approach to solve for the LCL. The basic algorithm is:
- Find the dew point from the LCL pressure and starting mixing ratio
- Find the LCL pressure from the starting temperature and dewpoint
- Iterate until convergence
The function is guaranteed to finish by virtue of the max_iters counter.