| Attribute Name -- Attribute Label |
Unit |
Attribute definition |
Year
--
Year
|
no unit |
Year |
|
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 |
|
|
PPT_Sum
--
Total summer precipitation
|
Millimeter |
Total summer precipitation |
|
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. |
|
|
GDD
--
Growing degree days calculated by air temperatures in 2m
|
Degrees Celsius |
Growing degree days calculated by air temperatures in 2m. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Growing Degree Days aggregated 3months before H2 |
|
Description
:
|
The cumulative growing degree-days (GDD) reflect the accumulated heat (or insolation) above a certain base temperature (5°C in our study) and below a defined upper threshold (30°C in our study) where plant growth is assumed to occur. |
|
|
AT_Mean
--
Mean air temperature in 2m (°C)
|
Degrees Celsius |
Mean air temperature in 2m (°C) |
|
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. |
|
|
AT_MaxMean
--
Mean of the daily maximum air temperatures in 2m
|
Degrees Celsius |
Mean of the daily maximum air temperatures in 2m. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Mean of the daily maximum air temperatures averaged 3months before H2 |
|
Description
:
|
This attributes denotes the Mean of the daily maximum air temperatures derived from air temperature measurements with a Pt-100 at 2m height. |
|
|
PPT_Max
--
Maximum of the daily precipitation amounts
|
Millimeter |
Maximum of the daily precipitation amounts. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Maximum of daily precipiation in the 3months before H2 |
|
Description
:
|
This attributes denotes the Maximum of the daily precipitations sums for the 3months prior to September harvest. Precipitations measurements were performed using three randomly distributed Hellmann samplers. |
|
|
No_dry_days
--
Number of days with less than 1 mm of precipitation
|
day |
Number of days with less than 1 mm of precipitation. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Number of dry days 3months before H2 |
|
Description
:
|
This attributes denotes the Number of dry days (with less than 1mm/day) for the 3months prior to September harvest. Precipitations measurements were performed using three randomly distributed Hellmann samplers. |
|
|
No_rain_events
--
Number of rain events, where consecutive days with precipitation > 1 mm are counted as one event
|
Count |
Number of rain events, where consecutive days with precipitation > 1 mm are counted as one event. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Number of rain events 3months before H2 |
|
Description
:
|
This attributes denotes the Number of rain events for the 3months prior to September harvest. Consecutive days with precipitation > 1 mm are counted as one event. Precipitations measurements were performed using three randomly distributed Hellmann samplers. |
|
|
Mean_event_size
--
Mean precipitation amount for one rain event
|
Millimeter |
Mean precipitation amount for one rain event. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Mean precipiation amount for one precipiation event 3months before H2 |
|
Description
:
|
This attribute denotes the mean precipitation amount per precipitation event (consecutive days with precipitation less than 1mm/day). Precipitation measurements were performed using three randomly distributed Hellmann samplers. |
|
|
Max_dry_interval_length
--
Number of days in the longest period of consecutive dry days with less than 1 mm precipitation
|
day |
Number of days in the longest period of consecutive dry days with less than 1 mm precipitation. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Maximum length of a dry period 3months before H2 |
|
Description
:
|
Number of days in the longest period of consecutive dry days with less than 1 mm precipitation for 3months prior to September harvest. Precipitation measurements were performed using three randomly distributed Hellmann samplers. |
|
|
Mean_dry_interval_length
--
A dry interval is defined by at least six consecutive days with less than 1 mm of precipitation.
|
day |
A dry interval is defined by at least six consecutive days with less than 1 mm of precipitation. The average length of the dry intervals is calculated. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Mean dry interval length 3months prior to H2 |
|
Description
:
|
This attribute denotes the mean dry interval length for the 3months prior to September harvest. A dry interval is defined by at least six consecutive days with less than 1 mm of precipitation. The average length of the dry intervals is calculated. Precipitation measurements were performed using three randomly distributed Hellmann samplers. |
|
|
KDD
--
Killing degree days calculated by air temperatures in 2m
|
Degrees Celsius |
Killing degree days calculated by air temperatures in 2m. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Killing degree days 3months prior to harvest |
|
Description
:
|
Number of days with maximum air temperatures higher than 30°C. Air temperatures measurements were performed by a Pt-100 at 2m height. |
|
|
AT_MeanTrans
--
Transformed mean air temperature in 2m with growth optimum assumed at longterm average
|
Degrees Celsius |
Transformed mean air temperature in 2m with growth optimum assumed at longterm average. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Transformed air temperature 3months prior to H2 |
|
Description
:
|
This attribute denotes the air temperature which was transformed to reflect optimum growth condtions. The long-term average air temperature for the 3months prior to September harvest (17.4°C) is assumed as the optima. Air temperatures measurements were performed by a Pt-100 at 2m height. |
|
|
eAGB
--
Average aboveground biomass in the rings under elevated CO2
|
Gram per square meter |
Average aboveground biomass in the rings under elevated CO2. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Mean biomass in the elevated rings (September - H2) |
|
Description
:
|
This attribute denotes the averaged September aboveground biomass for the elevated rings. |
|
|
aAGB
--
Average aboveground biomass in the control rings under ambient CO2
|
Gram per square meter |
Average aboveground biomass in the control rings under ambient CO2. |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Mean biomass in the ambient rings (September - H2) |
|
Description
:
|
This attribute denotes the averaged September aboveground biomass for the elevated rings. |
|
|
