Tip

1. Need help? Please let us know in the UMEP Community.

2. Please report issues with the manual on the GitHub Issues.

3. Please cite SUEWS with proper information from our Zenodo page.

3.4. Meteorological Input File

SUEWS is designed to run using commonly measured meteorological variables (e.g. incoming solar radiation, air temperature, relative humidity, pressure, wind speed, etc.).

When preparing this input file, please note the following:

• Required inputs must be continuous – i.e. gap fill any missing data.

• Temporal information (i.e., iy, id, it and imin) should be in local time and indicate the ending timestamp of corresponding periods: e.g. for hourly data, 2021-09-12 13:00 indicates a record for the period between 2021-09-12 12:00 (inclusive) and 2021-09-12 13:00 (exclusive).

• The table below gives the must-use (MU) and optional (O) additional input variables. If an optional input variable (O) is not available or will not be used by the model, enter ‘-999’ for this column.

• One single meteorological file can be used for all grids (MultipleMetFiles=0 in RunControl.nml, no grid number in file name) if appropriate for the study area.

• Separate met files can be used for each grid if data are available (MultipleMetFiles=1 in RunControl.nml, filename includes grid number).

• The meteorological forcing file names should be appended with the temporal resolution in minutes: tt in SS_YYYY_data_tt.txt (or SSss_YYYY_data_tt.txt for multiple grids).

• Separate met forcing files should be provided for each year.

• Files do not need to start/end at the start/end of the year, but they must contain a whole number of days.

• The meteorological input file should match the information given in SUEWS_SiteSelect.txt.

• If a partial year is used that specific year must be given in SUEWS_SiteSelect.txt.

• If multiple years are used, all years should be included in SUEWS_SiteSelect.txt.

• If a whole year (e.g. 2011) is intended to be modelled using and hourly resolution dataset, the number of lines in the met data file should be 8760 and begin and end with:

  iy     id  it  imin
  2011   1   1   0 …
  …
  2012   1   0   0 …
  

3.4.1. SSss_YYYY_data_tt.txt

Changed in version v2017a: Since v2017a forcing files no longer need to end with two rows containing ‘-9’ in the first column.

Main meteorological data file.

No.	Use	Column Name	Description
1	MU	iy	Year [YYYY]
2	MU	id	Day of year [DOY]
3	MU	it	Hour [H]
4	MU	imin	Minute [M]
5	O	qn	Net all-wave radiation [W m-2] (Required if NetRadiationMethod = 0.)
6	O	qh	Sensible heat flux [W m-2]
7	O	qe	Latent heat flux [W m-2]
8	O	qs	Storage heat flux [W m-2]
9	O	qf	Anthropogenic heat flux [W m-2]
10	MU	U	Wind speed [m s-1] (measurement height (z) is needed in SUEWS_SiteSelect.txt)
11	MU	RH	Relative Humidity [%] (measurement height (z) is needed in SUEWS_SiteSelect.txt)
12	MU	Tair	Air temperature [°C] (measurement height (z) is needed in SUEWS_SiteSelect.txt)
13	MU	pres	Barometric pressure [kPa] (measurement height (z) is needed in SUEWS_SiteSelect.txt)
14	MU	rain	Rainfall [mm] (measurement height (z) is needed in SUEWS_SiteSelect.txt)
15	MU	kdown	Incoming shortwave radiation [W m-2] Must be > 0 W m-2.
16	O	snow	Snow cover fraction (0 – 1) [-] (Required if SnowUse = 1)
17	O	ldown	Incoming longwave radiation [W m-2]
18	O	fcld	Cloud fraction [tenths]
19	O	Wuh	External water use [m3]
20	O	xsmd	Observed soil moisture [m3 m-3] or [kg kg-1]
21	O	lai	Observed leaf area index [m-2 m-2]
22	O	kdiff	Diffuse radiation [W m-2] Recommended in this version. if SOLWEIGUse = 1
23	O	kdir	Direct radiation [W m-2] Recommended in this version. if SOLWEIGUse = 1
24	O	wdir	Wind direction [°] Not available in this version.