A 1973–2008 Archive of Climate Surfaces for NW Maghreb
Abstract
:1. Summary
2. Data Description
2.1. Data
- Mean maximum temperature (°C): arithmetic mean of the daily maximum temperatures (tmax)
- Mean minimum temperature (°C): arithmetic mean of the daily minimum temperatures (tmin)
- Mean temperature (°C): arithmetic mean of the daily mean temperatures (tmed)
- Total precipitation (mm): sum of the daily precipitations (rain)
2.2. Metadata
2.3. Dataset
- Characters 1–4: variable name (tmax, tmin, tmed or rain)
- Characters 5–8: year (1973 to 2008)
- Characters 9–10: month (01 to 12)
3. Methods
4. User Notes
- petHgsm to compute one layer of Potential Evapotranspiration (PET) from tmax, tmed, tmin and extraterrestrial solar radiation layers (internally computed) using the Hargreaves-Samani method [19]. The sister function batchpetHgsm does the same, but for a specified sequence of layers.
- aiObsMe to compute the FAO-UNEP aridity index as the precipitation ratio to PET for a sequence of layers.
- rgf.summary to query a sequence of layers and save the resulting summary in a new layer. This summary refers to the population of each grid cell in the specified sequence. Choices are sum, maximum, minimum, mean, count, range, standard deviation, variance and median. The length of the sequences is controlled by the argument step.
Acknowledgments
Author Contributions
Conflicts of Interest
Abbreviations
EPSG | European Petroleum Survey Group |
FAO | Food and Agriculture Organization of the United Nations |
GCV | Generalized Cross Validation error |
GCOS | Global Climate Observing System |
GHCN-Monthly | Global Historical Climatology Network-Monthly |
GSOD | Global Surface Summary of the Day |
NCEI | National Centers for Environmental Information |
netCDF | Network Common Data Form |
NPP | Net Primary Productivity |
PET | Potential Evapotranspiration |
RTGCV | Square Root of GCV |
UNCCD | United Nations Convention to Combat Desertification |
UNEP | United Nations Environment Program |
WMO | World Meteorological Organization |
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Field | Value | Observations |
---|---|---|
file format | netCDF ‘classic’ | |
data type | integer | |
file type | binary | |
columns | 2882 | |
rows | 1320 | |
ref. system | latlong | Geodetic coordinates in WGS84 datum (EPSG code: 4326) |
ref. units | degrees | The units used to specify position in the layers |
min. X | −11.9924701 | |
max. X | 12.0145889 | |
min. Y | 27.9983998 | |
max. Y | 38.9939993 | |
resolution | 0.0083300 | Equivalent to 925.63 m in a maximum circle |
scaling factor | 0.01 | Number which multiplies layer values to yield T or P |
min. value | e.g.,: −1286 | Must be rescaled: −1286 × scaling factor = −12.86 |
max. value | e.g.,: 1314 | Must be rescaled: 1314 × scaling factor = 13.14 |
value units | °C or mm | Temperature or precipitation respectively |
flag value | −32768 | Used to mask sea and background areas |
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Share and Cite
Ruiz, A.; Sanjuan, M.E.; Puigdefabregas, J.; Del Barrio, G. A 1973–2008 Archive of Climate Surfaces for NW Maghreb. Data 2016, 1, 8. https://doi.org/10.3390/data1020008
Ruiz A, Sanjuan ME, Puigdefabregas J, Del Barrio G. A 1973–2008 Archive of Climate Surfaces for NW Maghreb. Data. 2016; 1(2):8. https://doi.org/10.3390/data1020008
Chicago/Turabian StyleRuiz, Alberto, Maria E. Sanjuan, Juan Puigdefabregas, and Gabriel Del Barrio. 2016. "A 1973–2008 Archive of Climate Surfaces for NW Maghreb" Data 1, no. 2: 8. https://doi.org/10.3390/data1020008