Published
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Oct 10, 2021
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md`# Time Series Analysis with GeoBlaze: Mean Daily Air Temperature for the Month of May
## By Daniel J. Dufour and Victoria Mak
**Explanation**: Daily Mean Air Temperatures at 2 metres averaged over 1 Month for a given Bounding Box
### Citation:
Karger, D.N., Conrad, O., Böhner, J., Kawohl, T., Kreft, H., Soria-Auza, R.W., Zimmermann, N.E., Linder, H.P. & Kessler, M. (2017) Climatologies at high resolution for the earth’s land surface areas. Scientific Data 4, 170122.
Karger, D.N., Conrad, O., Böhner, J., Kawohl, T., Kreft, H., Soria-Auza, R.W., Zimmermann, N.E., Linder, H.P., Kessler, M. (2017) Data from: Climatologies at high resolution for the earth’s land surface areas. Dryad Digital Repository. https://doi.org/10.5061/dryad.kd1d4
### Sources:
http://chelsa-climate.org/wp-admin/download-page/CHELSA_tech_specification.pdf`
month = "05"
start_year = 1979
end_year = 2013
lodash = require("lodash")
years = lodash.range(1979, 2013 + 1)
bounding_box = {
return { xmin: -107.3583984375, xmax: -90.65917968749999, ymin: 24.766784522874453, ymax: 37.47485808497102 };
}
urls = years.map(year => `https://s3.amazonaws.com/geoblaze/CHELSA/CHELSA_tmean_${year}_${month}_V1.2.1.resized.tif`);
geoblaze = require('geoblaze')
georasters = Promise.all(urls.map(geoblaze.load))
georasters[0].toCanvas({ height: 500, width: 500 })
means = georasters.map(georaster => geoblaze.mean(georaster, bounding_box)[0])
Plotly = require("https://cdn.plot.ly/plotly-latest.min.js")
x = years.map(year => `${year}-${month}`)
y = means.map(mean => {
const kelvin = mean / 10;
const celsius = kelvin - 273.15;
const farenheit = (celsius * 9/5) + 32;
return farenheit;
});
{
var trace = {
type: "scatter",
mode: "lines",
name: 'y',
x: x,
y: y,
line: {color: '#17BECF'}
}
var data = [trace];
var layout = {
title: 'Mean Daily Air Temperature for the Month of May (Farenheit)',
width: width
};
const div = DOM.element('div');
Plotly.newPlot(div, data, layout);
return div;
}
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