< p > < a href = " https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021EF002334 " rel = " nofollow noreferrer " > < em >湿球温度的全球温度的显式计算与近似和为什么它重要劳动生产率< / em > < / >可能有助于解释发生了什么。< / p > < p > Liljegren计算的方法似乎是激烈。It involves three equations, the two main ones are for Tw & Tg, equations 3 & 5. The equations needs to be solved by iteration. $..............(3)$
$..............(4)$
$..............(5)$
By ignoring direct sunlight & wind speed, the web page you link to is simplifying things & producing an approximation; something similar to calculating sW BGT, equation 1.
$.............(1)$