Hi
I intend to model a thermal responde we measured with ERA5 variables, and later, use this model to predict the future responde with CMIP6 variables.
My doubt is, how to use precipitation correctly?
In ERA5 hour analysis total precipitation comes in meters acumulated in 1hour (so its m/h I suppose) and in CMIP6 comes in Kg/m2/s .
Kg/m2/s is the same as mm/s, so I'm wondering if turning ERA5 precipitation from meters/hour to mm/s and use that in a valid way?
Also, am I messing up units considering the grids are not even the same in both datasets?
Thank you!
Cheers, Luís Pereira.
Hi Luis
To convert precipitation from g/m**2/s , you have to multiply by 3.6 to get precipitation in mm/hour. Since 1g=0.001kg, we can match units of kg/m**2/s to mm/hr. Now if you have the time of accumulation of precipitation in hr, you can easily match the two units (kg/m2/sec to meter).
See "On the continuity and distribution of water substance in atmospheric circulations" by E. Kessler, Atmospheric Research 38 (1995) 109-145.
Hi Luis,
besides the very good answer of Alain, this might be helpful too:
https://www.researchgate.net/post/How-do-I-convert-ERA-Interim-precipitation-estimates-from-kg-m2-s-to-mm-day
