Environmental Engineering Reference
In-Depth Information
Twenty of the most relevant available environmental variables were selected for the
construction of the stratification, based mainly on those identified by statistical
screening (Bunce et al.
1996
b). These were:
•
Climate variables from the Climatic Research Unit (CRU) TS1.2 dataset (Mitchell
et al.
2004)
Elevation and slope data from the United States Geological Survey HYDRO1k
•
digital terrain model; and
Indicators for oceanicity and northing.
•
Data were analysed at 1 km
2
resolution. Principal component analysis (PCA) was
then used to compress 88% of the variation into three dimensions, which were
subsequently clustered using an ISODATA clustering routine. The classification
procedure is described in detail elsewhere (Metzger et al.
2005)
.
The following 13 EnZs are distinguished:
-
EnZ 1: Alpine North (ALN)
-
EnZ 2: Boreal (BOR)
-
EnZ 3: Nemoral (NEM)
-
EnZ 4: Atlantic North (ATN)
-
EnZ 5: Alpine South (ALS)
-
EnZ 6: Continental (CON)
-
EnZ 7: Atlantic Central (ATC)
-
EnZ 8: Pannonian (PAN)
-
EnZ 9: Lusitanian (LUS)
-
EnZ 10: Anatolian (ANA)
-
EnZ 11: Mediterranean Mountains (MDM)
-
EnZ 12: Mediterranean North (MDN)
-
EnZ 13: Mediterranean South (MDS)
Here only 12 EnZs are important, as Anatolia (Turkey) is not covered by the
SEAMLESS spatial framework (EU27+).
Description of European Soil DataBase (ESDBv2)
The European Soil Database, version two (ESDBv2) consists of a number of
databases of which the following two are used as input for the AEnZ:
-
The Soil Geographical Database of Eurasia at scale 1:1,000,000 (SGDBE),
which is a digitized European soil map and related attributes (version 4 beta).
The Pedo Transfer Rules Database (PTRDB) version 2.0, which holds a number
-
of pedotransfer rules which can be applied to the SGDBE; the results of the
application of the pedotransfer rules to the SGDBE are delivered as a table with
new attributes related to the European soil map.
