| Attribute Name -- Attribute Label |
Unit |
Attribute definition |
datetime
--
Date and Time
|
not mapped |
The date and time |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Date and time |
|
Description
:
|
This is the date and time of the observation |
|
|
treatment
--
Treatment
|
no unit |
Treatment of individuals with respect to experiments |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Treatment (GiFACE) |
|
Description
:
|
This flag defines whether the plot is treated with CO2 enriched air (-> elevated) or acting under atmospheric CO2 concentrations (-> ambient). |
|
|
ringpair
--
ID of the ring pair
|
Unitless |
ID of the ring pair |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
RingPair (GiFACE) |
|
Description
:
|
This value defines to which ring pair the plot belongs. |
|
|
BY_T
--
Total Biomass
|
Gram per square meter |
This attribute denotes the total biomass |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Total Biomass Yield (GiFACE) |
|
Description
:
|
This attribute is for the late-summer total aboveground biomass yield. |
|
|
CO2
--
CO2 concentration
|
Parts per million |
This attribute denotes the CO2 concentration. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
CO2 Conc |
|
Description
:
|
This attribute denotes the averaged CO2 concentration measured in the center of the ring at 60 cm aboveground, averaged to three months before harvest. |
|
Instrumentation:
|
Instrument:
Description:
|
Instrument: Infrared gas analyzer
|
Vendor: LI-COR
|
|
|
|
AT_Mean_3Months
--
Mean air temperature in the 3 months before H2
|
Degrees Celsius |
This attribute denotes mean air temperature in the three months before harvest, averaged from half-hourly measurements with a Pt-100 resistance thermometer at 2m height. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Mean air temperature in the 3 months before H2 |
|
Description
:
|
This attribute denotes mean air temperature in the three months before harvest, averaged from half-hourly measurements with a Pt-100 resistance thermometer at 2m height. |
|
|
WND_Mean_3Months
--
Mean wind speed in the 3 months before H2
|
Meter per second |
This attribute denotes the mean wind speed in the three months before harvest, averaged from half-hourly measurements with a cup anemometer at 2m height. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Mean wind speed in the 3 months before H2 |
|
Description
:
|
This attribute denotes the mean wind speed in the three months before harvest, averaged from half-hourly measurements with a cup anemometer at 2m height. |
|
|
PPT_Sum_3Months
--
Rainfall sum over the 3 months before H2
|
Millimeter |
This attribute denotes the rainfall sum in the three months before harvest, sum of half-hourly values of three Hellmann Samplers. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Rainfall sum over 3 months before H2 |
|
Description
:
|
This attribute denotes the rainfall sum in the three months before harvest, sum of half-hourly values of three Hellmann Samplers. |
|
|
GWL_Mean_3Months
--
Mean groundwater table in the 3 months before H2
|
Centimeter |
This attribute denotes mean groundwater table in the three months before harvest, averaged from daily values of three gauges. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Mean groundwater table in the three months before H2 |
|
Description
:
|
This attribute denotes mean air temperature in the three months before harvest, averaged from half-hourly measurements with a Pt-100 resistance thermometer at 2m height. |
|
|
SR_Sum_3Months
--
Sum of Solar radiation in the 3 months before H2
|
Megajoules per square meter |
This attribute denotes the sum of the solar radiation in the three months before harvest, averaged from half-hourly measurements with a pyranometer. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Sum of solar radiation in the three months before H2 |
|
Description
:
|
This attribute denotes the sum of the solar radiation in the three months before harvest, averaged from half-hourly measurements with a pyranometer. |
|
|
VapDef_Mean_3Months
--
Mean vapour pressure deficit in the 3 months before H2
|
Kilopascal |
This attribute denotes mean vapour pressure deficit in the three months before harvest, derived by FAO formula, using half-hourly air temperature and relative air humidity data. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Mean Vapour Pressure Deficit in the 3 months before H2 (GiFACE) |
|
Description
:
|
This attribute denotes the mean vapour pressure deficit in the three months before harvest. The vapour pressure deficit was calculated by means of mean daily air temperature, the mean daily relative humidity and the mean daily vapour pressure using the formula proposed in Allen et al. (1998).
Allen, R.G., L.S. Pereira, D. Raes, and M. Smith. Crop Evapotranspiration: Guidelines for computing crop water requirements. Irrigation and Drainage Paper 56, Food and Agriculture Organization of the United Nations, Rome. (1998). |
|
|
PM_ET_Mean_3Months
--
Mean evapotranspiration for a homogenoeous grass canopy in the 3 months before H2
|
Millimeter |
This attribute denotes the mean evapotranspiration for a homogenoeous grass canopy in the three months before harvest, derived on a daily basis using the FAO formula, with the input variables daily minimum and maximum air temperature, daily mean wind speed, daily solar radiation sum and the mean daily vapour pressure. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Mean evapotranspiration for a homogenoeous grass canopy in the 3 months before H2 |
|
Description
:
|
This attribute denotes the mean evapotranspiration for a homogenoeous grass canopy in the three months before harvest, derived on a daily basis using the FAO formula, with the input variables daily minimum and maximum air temperature, daily mean wind speed, daily solar radiation sum and the mean daily vapour pressure. |
|
|
SPEI_Mean_3Months
--
Mean SPEI in the 3 months before H2
|
Unitless |
This attribute denotes mean Standardised Precipitation Evapotranspiration Index (SPEI) in the three months before harvest. The SPEI is based on the climatic water balance defined by the total amount of precipitation minus evapotranspiration and was derived using the SPEI package (CRAN R). |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Mean SPEI in the 3 months before H2 |
|
Description
:
|
This attribute denotes the mean Standardised Precipitation Evapotranspiration Index (SPEI) in the three months before harvest. The SPEI is based on the climatic water balance defined by the total amount of precipitation minus evapotranspiration and was derived using the SPEI package (CRAN R). |
|
|
