Table 5 list of files shared in this dataset and description of their content.

From: Hydrologic outputs generated over the Great Lakes with a calibrated version of the GEM-Hydro model

Filename (Hydrologic variable)

Hydrologic Variable

Units

Definition

GEM-Hydro_calibrated_PR.nc

PR

mm/h

Hourly total precipitation over the hour preceding the date mentioned

GEM-Hydro_calibrated_ACWF.nc

ACWF

mm/h

Hourly evapo-transpiration over land surface over the hour preceding the date mentioned

GEM-Hydro_calibrated_TRAF.nc

TRAF

mm/h

Hourly surface runoff over land surface over the hour preceding the date mentioned

GEM-Hydro_calibrated_ALAT.nc

ALAT

mm/h

Hourly total lateral flow from land surface soil column (from all active soil layers) over the hour preceding the date mentioned

GEM-Hydro_calibrated_O1.nc

O1

mm/h

Hourly drainage from (vertical water flux leaving the) land surface last active soil layer over the hour preceding the date mentioned

GEM-Hydro_calibrated_WVEG.nc

WVEG

kg/m2 or mm

Water stored in/on the land surface vegetation at the date mentioned, but weighted such that it corresponds to an average height of water valid over the whole land surface

GEM-Hydro_calibrated_SWE.nc

SWE

kg/m2 or mm

Average Snow Water Equivalent over land surface at the date mentioned

GEM-Hydro_calibrated_WSL1.nc

WSL1

m3/m3

Soil moisture content for soil layer 1: for depth between 0 and 5 cm (volumetric fraction) at the date mentioned

GEM-Hydro_calibrated_WSL2.nc

WSL2

m3/m3

Soil moisture content for soil layer 2: for depth between 5 and 10 cm (volumetric fraction) at the date mentioned

GEM-Hydro_calibrated_WSL3.nc

WSL3

m3/m3

Soil moisture content for soil layer 3: for depth between 10 and 20 cm (volumetric fraction) at the date mentioned

GEM-Hydro_calibrated_WSL4.nc

WSL4

m3/m3

Soil moisture content for soil layer 4: for depth between 20 and 40 cm (volumetric fraction) at the date mentioned

GEM-Hydro_calibrated_WSL5.nc

WSL5

m3/m3

Soil moisture content for soil layer 5: for depth between 40 and 100 cm (volumetric fraction) at the date mentioned

GEM-Hydro_calibrated_WSL6.nc

WSL6

m3/m3

Soil moisture content for soil layer 6: for depth between 100 and 200 cm (volumetric fraction) at the date mentioned

GEM-Hydro_calibrated_WT.nc

WT

[—]

Fraction of grid cell occupied by land surface (constant over time).

GEM-Hydro_calibrated_streamflow.zip

Q

m3/s

Pairs of observed and simulated mean daily streamflow at flow gauge locations in txt format. Once unzipped, one file per gauge. The .txt filenames correspond to a US or Canadian gauge ID.

  1. See Methods for more details about the computations performed with the actual GEM-Hydro outputs to produce the variables mentioned in this table. All dates in these files are in UTC format, except for streamflow for which daily averages correspond to the time interval between midnight and midnight of the day after in local time (always EDT or UTC – 4 h).