Introduction.md

@@ -171,9 +171,9 @@ If you are not friendly with the repos, the user can proceed in this way to sear
 | zonal and meridional velocity components 10m wind (m/s)  | u10/v10 (m/s) | - | 
 | t2m(°K) (Temperature 2m) | t2m(°K) | - | 
 | t2m(°K) (Temperature 2m) /d2m(°K) (Dewpoint temperature 2m) / ps(Pa) (Pressure surface) | q2 (Kg/Kg) Specific humidity 2m | Bolton conversion formula |
-| ssrd(J/m2) (Surface solar radiation downwards) | radsw (W/m2) | also known as downward shortwave radiation at the sea surface |
-| strd(J/m2) (Surface thermal radiation downwards| radlw (W/m2) | also known as downward longwave radiation at the sea surface |
-| tp(m) (Total precipitation (precip+solid precip(snow))) | precip (kg/(m2s) == mm/s) | keep in mind :  1 mm of water = 1L/m2 = 1Kg/m2 |
+| ssrd(J/m2) (Surface solar radiation downwards) | radsw (W/m2) | also known as downward shortwave radiation at the sea surface (1h ERA5 field : radsw=ssrd/3600)  |
+| strd(J/m2) (Surface thermal radiation downwards| radlw (W/m2) | also known as downward longwave radiation at the sea surface (1h ERA5 field : radlw=strd/3600)  |
+| tp(m) (Total precipitation (precip+solid precip(snow))) | precip (kg/(m2s) == mm/s) | keep in mind :  1 mm of water = 1L/m2 = 1Kg/m2  (1h ERA5 field : precip=tp*1000/3600)  |
 | snow(m) | snow (kg/(m2s)) | precip*0 |