File:5 9 16 Andrea TempSpiralEdHawkins.gif
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Original file (743 × 791 pixels, file size: 1.79 MB, MIME type: image/gif, looped, 170 frames, 29 s)
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This file has been superseded by Global temperature change spiral 2020 100MPx.gif. It is recommended to use the other file. Please note that deleting superseded images requires consent. Reason to use the other file: "updated to year 2020"
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Summary[edit]
Description5 9 16 Andrea TempSpiralEdHawkins.gif |
English: Climate spiral: A spiral graph represents global temperature change (1850 to 2018); Data from the HadCRUT4 dataset http://www.metoffice.gov.uk/hadobs/hadcrut4/ |
Date | |
Source | Spiralling global temperatures Climate Log Book |
Author | Ed Hawkins, a climate scientist in the National Centre for Atmospheric Science at the University of Reading. |
Other versions |
Source code[edit]
A static version of this can be created with the following code:
Python Matplotlib source code |
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#!/usr/bin/python3
# -*- coding: utf8 -*-
import calendar
import matplotlib as mpl
import matplotlib.pyplot as plt
import numpy as np
import os
from math import *
plt.rc('mathtext', default='regular')
data_filename = "HadCRUT.4.6.0.0.monthly_ns_avg.txt"
if not os.path.isfile(data_filename):
print("need raw data from https://www.metoffice.gov.uk/hadobs/hadcrut4/index.html")
exit()
year_month_T = []
with open(data_filename, "r") as df:
for l in df.readlines():
l = l.strip().split()
year_month_T.append([int(l[0].split("/")[0]), int(l[0].split("/")[1]), float(l[1])])
years, months, T = [np.array(i) for i in zip(*year_month_T)]
T_baseline = np.mean(T[np.logical_and(years >= 1850, years <= 1900)])
T -= T_baseline
angles = -(months-1) / 12. * 2 * pi
points = np.vstack((angles, T)).T
n = len(points)
fig = plt.figure(figsize=(5, 5.4))
fig.patch.set_facecolor('#333333')
cmap = plt.cm.get_cmap('viridis')
ax = fig.add_axes([0.07, 0.07, 0.86, 0.8], projection="polar", axisbg="k")
ax.set_theta_zero_location("N")
r0, r1 = -1., 2.3
ax.set_ylim(r0, r1)
ax.add_artist(mpl.patches.Arc((0, 0), 2*(0-r0), 2*(0-r0), transform=ax.transData._b,
theta1=90+20, theta2=90-20, color="white", lw=1.8))
ax.add_artist(mpl.patches.Arc((0, 0), 2*(1.5-r0), 2*(1.5-r0), transform=ax.transData._b,
theta1=90+10, theta2=90-10, color="red", lw=1.8))
ax.add_artist(mpl.patches.Arc((0, 0), 2*(2-r0), 2*(2-r0), transform=ax.transData._b,
theta1=90+8, theta2=90-8, color="red", lw=1.8))
ax.text(0, 0.0, r"$0^\circ C$", color="white",
ha='center', va="center", fontsize=10, zorder=-1)
ax.text(0, 1.5, r"$1.5^\circ C$", color="red",
ha='center', va="center", fontsize=10, zorder=-1)
ax.text(0, 2.0, r"$2.0^\circ C$", color="red",
ha='center', va="center", fontsize=10, zorder=-1)
# note: replotting each time is slow, could be faster if figure was kept.
for i, (start, stop) in enumerate(zip(points[:iframe], points[1:iframe+1])):
x, y = zip(start, stop)
ax.plot(x, y, color=cmap(i /n))
ax.get_yaxis().set_visible(False)
ax.set_xticks(np.radians(np.arange(0, -360, -30)))
ax.set_xticklabels([calendar.month_abbr[i+1] for i in range(12)], color="#cccccc")
for i, tick in enumerate(ax.get_xticklabels()):
tick.set_rotation(-30 * i)
ax.grid(False)
fig.suptitle(u"Global temperature change (%s\u2013%s)" % (min(years), max(years)),
color="white")
fig.text(0.96, 0.02, 'HadCRUT4', ha='right', va='bottom', color="white", fontsize=8)
#ax.text(0, r0, str(years[iframe]), color="white", ha='center', va="center", fontsize=12)
plt.savefig("Temperature_spiral_HadCRUT4.svg",
facecolor=fig.get_facecolor(), edgecolor="none")
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Licensing[edit]
This file is licensed under the Creative Commons Attribution 3.0 Unported license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 21:30, 1 March 2020 | 743 × 791 (1.79 MB) | Bürgerentscheid (talk | contribs) | original file now resized with lanczos3. | |
21:39, 15 May 2016 | 720 × 775 (2.83 MB) | Fred Bauder (talk | contribs) | User created page with UploadWizard |
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