File:Sahel rainfall timeseries de.svg
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Size of this PNG preview of this SVG file: 800 × 333 pixels. Other resolutions: 320 × 133 pixels | 640 × 267 pixels | 1,024 × 427 pixels | 1,280 × 533 pixels | 2,560 × 1,067 pixels | 1,200 × 500 pixels.
Original file (SVG file, nominally 1,200 × 500 pixels, file size: 21 KB)
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Summary[edit]
| Description |
English: More than a century of rainfall data in the Sahel show an unusually wet period from 1950 until 1970 (positive index values), followed by extremely dry years from 1970 to 1990 (negative index values). From 1990 until present rainfall returned to levels slightly below the 1898–1993 average, but year-to-year variability was high.
Deutsch: Abweichung der Sahelzonen-Niederschlagsmenge vom Mittelwert des 20. Jahrhunderts.Der Zeitraum 1950-1970 war ungewöhnlich feucht(positive Werte), der Zeitraum 1970 bis 1990 extrem trocken (negative Werte). |
| Date | |
| Source | Own work, based on JISAO data |
| Author | Benedikt.Seidl |
| Other versions | Image:Sahel_rainfall_timeseries.gif |
Licensing[edit]
|
I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
Quellcode[edit]
download the data:
#!/usr/bin/python
# -*- coding: utf-8 -*-
import urllib
def main():
url = "http://jisao.washington.edu/data_sets/sahel/"
line_before = " +0 1 2 3 4 5 6 7 8 9\n"
data = urllib.urlopen(url)
for line in data:
if line == line_before:
for ten_years in data:
ten_years = ten_years.strip()
if ten_years == "":
break
elements = map(int, ten_years.split())
year_start, rain_data = elements[0], elements[1:]
for year, rain_data in enumerate(rain_data, year_start):
print("{0} {1}").format(year, rain_data)
if __name__ == '__main__':
main()
gnuplot:
#!/usr/bin/gnuplot
set terminal svg enhanced size 1200 500 fname "DejaVuSans" fsize 18
set output "Sahel_rainfall_timeseries_de.svg"
set noborder
set key reverse right bottom
set nokey
set xtics nomirror out
set ytics nomirror out
set ylabel 'Sahel Niederschlag Index'
set yrange [-4:4]
set xlabel 'Jahr'
set style line 12 lc rgb '#cccccc'
set grid ytics front linestyle 12
set xtics ("1900" 0, "1910" 10, "1920" 20, "1930" 30, "1940" 40, "1950" 50, "1960" 60, "1970" 70, "1980" 80, "1990" 90, "2000" 100, "2010" 110, "2020" 120)
set style data histogram
set style histogram cluster gap 0.2
set style fill solid noborder
set boxwidth 0.9
plot 'rain.data' u ($2/100) ti col lc rgb '#000080'
execute:
python rain.py > rain.data && gnuplot rain.dem
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 09:32, 9 July 2014 | | 1,200 × 500 (21 KB) | Benedikt.Seidl (talk | contribs) | update 2013 |
| 16:33, 1 July 2008 |  | 706 × 322 (48 KB) | Benedikt.Seidl (talk | contribs) | text für y-achse hinzugefügt + größere text | |
| 18:58, 28 June 2008 |  | 1,275 × 678 (95 KB) | Benedikt.Seidl (talk | contribs) | {{Information |Description={{en|1=More than a century of rainfall data in the Sahel show an unusually wet period from 1950 until 1970 (positive index values), followed by extremely dry years from 1970 to 1990 (negative index values). From 1990 until 2004 |
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