The model developed by Liljegren et al (2008) [1] is the recommended approach for esmating wet-bulb globe temperature (WBGT) [2], but it requires iterative calculation from solving the nonlinear enegy balance equations of the wet wick and black globe sensors. By carefully exmaining self-nonlinearities in Liljegren's model, we develop an analytic WBGT approximation that doesn't require iteration while maintaining high accuracy and most of the physics of Liljegren's model.
WBGT_analytic.py: Python script for calculating the analytic approximation of WBGT.coszenith.pyx: Cython code for calculating cosine zenith angle as develped by Kong and Huber (2022) [3]setupcoszenith.py: Python setup tool script for compilingcoszenith.pyxCalculate_analytic_WBGT_with_CMIP6_data.ipynb: A jupyter nobtebook introducing the usage of our code.environment.yml: a YAML file that can be used to build conda environment containing all needed python packages.
coszenith.pyx need to be compiled first to obtain a shared object file .so that can be import in Python. The setup tool script setupcoszenith.py is used for such purpose:
- for Intel compiler:
LDSHARED="icc -shared" CC=icc python setupcoszenith.py develop
- for gcc compiler:
- replace '-qopenmp' with '-fopenmp' in the
setupcoszenith.pyfile. python setupcoszenith.py build_ext --inplace
- replace '-qopenmp' with '-fopenmp' in the
If you want to use our code, please consider cite upcoming
[1] Liljegren JC, Carhart RA, Lawday P, Tschopp S, Sharp R. Modeling the wet bulb globe temperature using standard meteorological measurements. J Occup Environ Hyg. 2008;5(10):645-55.
[2] Lemke B, Kjellstrom T. Calculating workplace WBGT from meteorological data: a tool for climate change assessment. Ind Health. 2012;50(4):267-78.
[3] Kong, Q. & Huber, M. Explicit calculations of Wet Bulb Globe Temperature compared with approximations and why it matters for labor productivity. Earth’s Future (2022) doi:10.1029/2021EF002334.