SPECIES

• Abies alba (10)
• Fagus sylvatica (15)
• Malus sylvestris (3)
• Picea abies (11)
• Pinus halepensis (11)
• Pinus pinaster (12)
• Pinus pinea (6)
• Pinus sylvestris (14)
• Populus nigra (15)
• Quercus robur (12)

Key: chr_Dsoil

Definition: Vertical distance from soil surface to the bottom of the excavated pit or of the soil auger core

Description: The soil depth is determined either by excavating a pit or by extracting a soil core with a soil auger to the depth at which rocks are found or the extraction of further soil is impossible. It can be used together with soil texture to calculate the amount of water stored in the soil that can be utilised by trees.

Type: _type_number_integer

Range: -

SPECIES

• Abies alba (10)
• Fagus sylvatica (5)
• Malus sylvestris (3)
• Picea abies (12)
• Pinus halepensis (11)
• Pinus pinaster (2)
• Pinus pinea (6)
• Pinus sylvestris (4)
• Populus nigra (1)
• Quercus robur (12)

Key: chr_Esoil

Definition: Average percentage of soil coarse elements in the soil of the GCU

Description: The soil coarse elements are the individual mineral constituents greater than 2 mm and include gravel, pebbles, stones and blocks. The values are estimated in horisons of 20 cm in the soil pit inside the representative circular plot and then averaged across all horisons. It gives average share of soil corse elements in the soil of the GCU.

Type: _type_number

Range: -

SPECIES

• Abies alba (10)
• Fagus sylvatica (15)
• Malus sylvestris (3)
• Picea abies (12)
• Pinus halepensis (11)
• Pinus pinaster (12)
• Pinus pinea (6)
• Pinus sylvestris (14)
• Populus nigra (15)
• Quercus robur (12)

Key: chr_LatPlotMeasured

Definition: Latitude measured in the field by projects (not NFPs)

Description: Latitude measured in the circular plot within the GCU

Type: _type_number

Range: -

SPECIES

• Abies alba (10)
• Fagus sylvatica (15)
• Malus sylvestris (3)
• Picea abies (12)
• Pinus halepensis (11)
• Pinus pinaster (12)
• Pinus pinea (6)
• Pinus sylvestris (14)
• Populus nigra (15)
• Quercus robur (12)

Key: chr_LonPlotMeasured

Definition: Longitude measured in the field by projects (not NFPs)

Description: Longitude measured in the circular plot within the GCU

Type: _type_number

Range: -

SPECIES

• Abies alba (9)
• Fagus sylvatica (14)
• Malus sylvestris (2)
• Picea abies (9)
• Pinus halepensis (10)
• Pinus pinaster (9)
• Pinus pinea (2)
• Pinus sylvestris (12)
• Populus nigra (4)
• Quercus robur (4)

Key: chr_measured_Aspect

Definition: Local aspect measured in the representative circular plot with a radius of 15 m.

Description:

Type: _type_number

Range: -

SPECIES

• Abies alba (10)
• Fagus sylvatica (15)
• Malus sylvestris (3)
• Picea abies (11)
• Pinus halepensis (11)
• Pinus pinaster (12)
• Pinus pinea (6)
• Pinus sylvestris (14)
• Populus nigra (15)
• Quercus robur (12)

Key: chr_measured_Elevation

Definition: Local elevation measured in the representative circular plot with a radius of 15 m.

Description:

Type: _type_number_integer

Range: -

SPECIES

• Abies alba (10)
• Fagus sylvatica (15)
• Malus sylvestris (3)
• Picea abies (12)
• Pinus halepensis (11)
• Pinus pinaster (12)
• Pinus pinea (6)
• Pinus sylvestris (14)
• Populus nigra (15)
• Quercus robur (12)

Key: chr_measured_Slope

Definition: Local slope measured in the representative circular plot with a radius of 15 m.

Description:

Type: _type_number

Range: 90 - 0

SPECIES

• Abies alba (10)
• Fagus sylvatica (15)
• Malus sylvestris (3)
• Picea abies (12)
• Pinus halepensis (11)
• Pinus pinaster (12)
• Pinus pinea (6)
• Pinus sylvestris (14)
• Populus nigra (15)
• Quercus robur (12)

Key: chr_MicroTopography

Definition: Micro-topography assessed in the representative circular plot within the GCU

Description: Micro-topography is assessed at the *scale* of the *representative circular plot* with a *radius of 15 m*. with the following three categories: - `chr_MicroTopography_1`: convex - `chr_MicroTopography_2`: neutral - `chr_MicroTopography_3`: concave The index allows to determine whether there is more in- or outflow of water which has an influence on the soil available water capacity. For example, there is more water inflow if the topography is concave but there is more outflow if the topography is convex.

Type: _type_string_enum

SPECIES

• Abies alba (10)
• Fagus sylvatica (13)
• Malus sylvestris (3)
• Picea abies (12)
• Pinus halepensis (11)
• Pinus pinaster (12)
• Pinus pinea (6)
• Pinus sylvestris (12)
• Populus nigra (11)
• Quercus robur (12)

Key: chr_TruePAI

Definition: The projected area of green leaves, needles and some branches or trunk per unit horizontal ground surface area

Description: The true plant area index value (PAI) is assessed at the position corresponding to and in between 10 measured adult dominant or co-dominant trees sampled either inside or in the vicinity of the representative circular plot with a radius of 15 m. Its is assessed using a digital camera (hemispherical pictures). It includes all tree species present in the plot. The effect of foliage agregation is removed.

Type: _type_number

Range: -