Temperature Anomaly

import matplotlib.pyplot as plt
import numpy as np

COLORS = {
    'arctic': '#3B82F6',
    'temperate': '#10B981',
    'tropical': '#F59E0B',
    'background': '#FFFFFF',
    'text': '#1E293B',
    'text_muted': '#64748B',
    'grid': '#F1F5F9'
}

years = np.arange(1980, 2025)
np.random.seed(42)
arctic = 0.2 + 0.04*(years - 1980) + np.random.normal(0, 0.1, len(years))
temperate = 0.1 + 0.02*(years - 1980) + np.random.normal(0, 0.08, len(years))
tropical = 0.05 + 0.015*(years - 1980) + np.random.normal(0, 0.05, len(years))

fig, ax = plt.subplots(figsize=(12, 6), dpi=100)
ax.set_facecolor(COLORS['background'])
fig.patch.set_facecolor(COLORS['background'])

ax.stackplot(years, arctic, temperate, tropical,
             colors=[COLORS['arctic'], COLORS['temperate'], COLORS['tropical']],
             alpha=0.85, labels=['Arctic', 'Temperate', 'Tropical'])

ax.spines['top'].set_visible(False)
ax.spines['right'].set_visible(False)
ax.spines['left'].set_color(COLORS['grid'])
ax.spines['bottom'].set_color(COLORS['grid'])
ax.yaxis.grid(True, color=COLORS['grid'], linewidth=1, zorder=0)
ax.set_axisbelow(True)
ax.tick_params(axis='both', colors=COLORS['text_muted'], labelsize=9, length=0, pad=8)
ax.set_xlim(1980, 2024)
ax.set_ylabel('Temp. Anomaly (°C)', fontsize=10, color=COLORS['text'], labelpad=10)
ax.legend(loc='upper center', bbox_to_anchor=(0.5, -0.12), ncol=3, frameon=False, fontsize=9, labelcolor=COLORS['text_muted'])

plt.tight_layout()
plt.show()