GLM Calibration Guide

Overview

GLM calibration involves adjusting physical parameters to minimize the difference between simulated and observed water temperatures. The goal is typically to achieve RMSE < 2.0°C.

Key Calibration Parameters

Parameter	Section	Description	Default	Range
`Kw`	`&light`	Light extinction coefficient (m⁻¹)	0.3	0.1 - 0.5
`coef_mix_hyp`	`&mixing`	Hypolimnetic mixing coefficient	0.5	0.3 - 0.7
`wind_factor`	`&meteorology`	Wind speed scaling factor	1.0	0.7 - 1.3
`lw_factor`	`&meteorology`	Longwave radiation scaling	1.0	0.7 - 1.3
`ch`	`&meteorology`	Sensible heat transfer coefficient	0.0013	0.0005 - 0.002

Parameter Effects

Installs

Source

skills.volces.c…ub/wu-uk

First Seen

Apr 24, 2026