EuroSun2008-13

Study area and observations

This study has been conducted within the Natural Park of Sierra Magina, in Southern Spain (37.6° N, 3.4° W) (Fig. 1). The area has a rough extension of 30 km x 48 km and shows a relatively complex topography, with a minimum height above sea level of 600 m and a maximum of 2150 m, with the 50% of the grids points above 800 m. The maximum surface slope is 56.94° and the 25% of the grids have a slope higher than 16.41°. The predominant surface orientation is around North. This aspects distribution benefits the existence of terrain patches with no direct solar beam along the year. The local climate is that of a typical middle and high Mediterranean mountainous environment, with dry hot summers, cold winters and relatively high precipitation during autumn and spring.

Located within the park, our research group have deployed a total of 11 radiometric stations (Figure 2). The radiometric stations are equipped, among other instrumentation, with HOBO (Onset Corporation) data-loggers that record the global irradiance registered by Licor 200-SZ radiometers. An annual calibration and inter-comparison of the sensors is carried out and the instrumental error is estimated to be less than 5%, typically 3%. The data set consists on data recorded on a 10 minutes basis and, for the purposes of this work, they were averaged to a hourly basis. In order to avoid the cosine error of the sensors, those data corresponding to a solar height below 7° were discarded. The location of the stations cover a range of elevations, slopes and aspects as wide as was possible. Table 1 shows the topographic features of the stations.

 

Fig. 1. Localization of the study area.

 

2

 

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5

8

Подпись: 9Mr

Fig. 2. Location of the stations. Results at stations 4, 5 and 11 are evaluated in this study.

Station

Name

Elevation(m. a.s. l.)

Slope (°)

Aspect (°)

1

Jaen

443

0

0

2

Mancha Real

762

0

0

3

Almaden

1982

0

0

4

Torres

1075

25

250

5

Albanchez

854

30

100

6

Bedmar

634

15

270

7

Cuadros

603

25

115

8

Moraleda

704

16

110

9

Huelma

859

0

0

10

Cedefo

1155

0

0

И

Pegalajar

791

15

170

Table 1. Topographic features of the stations. Aspect values are presented in decimal degrees measured from North, increasing clockwise. Results presented in this study correspond to stations 4, 5 and 11 (underlined).

EuroSun2008-13

Benchmarking

Benchmarking is the largest activity within the MESoR project. The aim of the benchmarking exercise is to establish a coherent set of benchmarking rules and reference data sets to enable …

Analysed databases and integrated systems

Each of the databases analysed here is integrated within a system (software setup) that provides additional tools for search, query, maps display, and calculation of derived parameters. PVGIS (the European …

Linke’s Turbidity Factor Applied to Worldwide Global. Horizontal Irradiance Measurements

Frank Bason SolData Instruments, Linabakken 13, DK-8600 Silkeborg, DenmarkCorresponding Author, soldata@soldata. dk Abstract The data collection phase of the Danish Galathea III Expedition was conducted from August 2006 until April …

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