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Comment: Confirmed.

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The model output consists of two NetCDF files, each with five layers. The first dataset is the actual ET with the following filename format:

ET_C3S-glob-agric_GLS_CDS_EO_dek_20040820-20040831.nc

  • ET_C3S-glob-agric_GLS_CDS_EO Product short name “ET” is actual
  • dek_20040820-20040831 start and the end of the dekadal period of the
  • .nc - Data format NetCDF.

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table1
table1
Table 1: Description of netCDF ET file attributes

Layer number

Layer Name

Layer description

Scaling factor

Units

1

ET

actual evapotranspiration

1

mm/dekad

2

LAI QFLAG

Quality Assessment Report of the Collection 1km LAI.

NA

See GIOGL1_PUM_LAI1km-
V2_I1.32.pdf

3

FC QFLAG

Quality Assessment Report of the Collection 1km FCover.

NA

See GIOGL1_PUM_FCOVER1km-
V2_I1.31.pdf

4

ALB QFLAG

Quality Assessment Report of the Collection 1km Albedo.

NA

See CGLOPS1_PUM_SA1km-
V1_I1.40.pdf

5

LUT_
pixel count

actual number of pixels used in the resampling process from land use layer.

NA

dimensionless

The second dataset is the potential ET with name format:

PET_C3S-glob-agric_GLS_CDS_EO_dek_20040830-20040831.nc (at 0.1 degree lat/lon grid)

...

Anchor
table2
table2
Table 2: Description of netCDF PET file attributes

Layer number

Layer Name

layer description

Scaling factor

Units

1

PET

actual evapotranspiration

1

mm/dekad

2

LAI QFLAG

Quality Assessment Report of the Collection 1km LAI.

NA

See GIOGL1_PUM_LAI1km-
V2_I1.32.pdf

3

FC QFLAG

Quality Assessment Report of the Collection 1km FCover.

NA

See GIOGL1_PUM_FCOVER1km-
V2_I1.31.pdf

4

ALB QFLAG

Quality Assessment Report of the Collection 1km Albedo.

NA

See CGLOPS1_PUM_SA1km-
V1_I1.40.pdf

5

LUT_
pixel count

actual number of pixels used in the resampling process from land use layer.

NA

dimensionless

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_TOC_250008
_TOC_250008
Product validation

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table3
table3
Table 3: EC tower names, location and land cover types reported by EC and the land cover used in the model.

EC tower name

RMS 1 km

RMS3 km

RMS 10 km

EC land cover

Model land cover

Twt

1.59

1.16

1.67

Crop land

Crop land

Tw3

1.03

1.22

1.64

Crop land

Crop land

Tw1


1.41

1.18

Wetland

Crop land

Tw4

2.76

1.04

1.19

Wetland

Crop land

Myb

0.84

1.22

-

Wetland

Grassland

Wkg

1.76

1.49

1.71

Grassland

Shrub land

VCM

-

1.7

1.5

ENF

ENF

Pfa

-

1.62

1.55

Wetland

ENF

OWC

-

3.4

1.5

Wetland

DBF

NC1

-

1.47

3.67

ENF

DES

Ca2

-

1.48

3.91

ENF

Shrubland

Ca3

-

3.39

2.94

ENF

MF

CA-TP4

-

2.23

2.34

ENF

DBF

IB2

1.65

1.81

1.14

Grassland

Grassland

UMB

-

2.15

-

DBF

DBF

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figure6
figure6


Figure 6: Root Mean square error (RMS) and correlations between MODGroETa model estimated ET and ground ET estimated using Twt EC tower with cropland land cover at three model resolution (1 ,3 and 10 km).The solid red lines represent that the ratio of ET estimates to ET measurements is 1.0 and the solid black lines are the regression of the ET estimates to measurements.

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Zhang, K., Kimball, J. S., Mu, Q., Jones, L. A., Goetz, S. J., and Running, S. W. (2009).
Satellite based analysis of northern ET trends and associated changes in the regional water balance from 1983 to 2005. Journal of Hydrology, 379(1), 92-110.


Info
iconfalse

This document has been produced in the context of the Copernicus Climate Change Service (C3S).

The activities leading to these results have been contracted by the European Centre for Medium-Range Weather Forecasts, operator of C3S on behalf of the European Union (Delegation agreement Agreement signed on 11/11/2014 and Contribution Agreement signed on 22/07/2021). All information in this document is provided "as is" and no guarantee or warranty is given that the information is fit for any particular purpose.

The users thereof use the information at their sole risk and liability. For the avoidance of all doubt , the European Commission and the European Centre for Medium - Range Weather Forecasts have no liability in respect of this document, which is merely representing the author's view.

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