xxxxxxxxxx
from matplotlib import pyplot as plt
df.plot()
xxxxxxxxxx
from matplotlib import pyplot as plt
import matplotlib.pyplot as plt
xxxxxxxxxx
from matplotlib import pyplot as plt
import matplotlib.pyplot as plt1
print(dir(plt) == dir(plt1))
True
xxxxxxxxxx
import numpy as np
import matplotlib.pyplot as plt
x = np.arange(0, 5, 0.1);
y = np.sin(x)
plt.plot(x, y)
xxxxxxxxxx
import matplotlib.pyplot as plt
x=[0,10,20,30,60,90]
y=[-4.39,-4.69,-4.99,-5.30,-6.21,-7.13]
fig=plt.figure()
ax=fig.add_axes([0,0,1,1]) #grand
plt.plot(x,y)
plt.show()
xxxxxxxxxx
import matplotlib.pyplot as plt
import numpy as np
# Generate pseudo-random numbers:
np.random.seed(0)
# Sampling interval:
dt = 0.01
# Sampling Frequency:
Fs = 1 / dt # ex[;aom Fs]
# Generate noise:
t = np.arange(0, 10, dt)
res = np.random.randn(len(t))
r = np.exp(-t / 0.05)
# Convolve 2 signals (functions):
conv_res = np.convolve(res, r)*dt
conv_res = conv_res[:len(t)]
s = 0.5 * np.sin(1.5 * np.pi * t) + conv_res
# Create the plot:
fig, (ax) = plt.subplots()
ax.plot(t, s)
# Function plots phase spectrum:
ax.phase_spectrum(s, Fs = Fs)
plt.title(“Phase Spectrum Plot”)
plt.show()
xxxxxxxxxx
The research team determined that polar bears existed on the southwestern margin of the Scandinavian Ice Sheet through the Late Glacial, surviving into the earliest Holocene (the present interglacial over the last 12,000 years). Paleoenvironmental proxies from marine sediments, such as single-celled foraminifera and diatomaceous algae, suggest summer temperatures in the region were 6–10°C.
Fossil polar bears survived last global warming deglaciation in Siberian and Canadian refugia
Polar bear fossils across Scandinavia and the Bering Sea dating from 11,000-15,000 years ago during the Late Glacial and Holocene deglaciation, as well as modeled sea ice extent for a key period of reduced fossil occurrence coinciding with peak warmth. Credit: Seppä et al, 2023.
Continuing into the interglacial, sea ice cover in the arctic 8,000–10,000 years ago is modeled to be approximately comparable to present day. During the Holocene, this supported an exceptional assemblage of polar bears on Zhokhov Island off the coast of Russia, where at least 130 polar bear remains have been found, and is inferred to represent the maximum perennial sea ice extent at this time.