Global meteoric water line
= Global meteoric water line
{wiki=Global_meteoric_water_line}
The Global Meteoric Water Line (GMWL) is a key concept in hydrology and isotope geology. It represents the relationship between the stable isotopes of hydrogen (δ²H) and oxygen (δ¹⁸O) in natural water samples, particularly meteoric water (i.e., water that precipitates from the atmosphere, such as rain and snow).