Orbital forcing

Orbital forcing is the effect on climate of slow changes in the tilt of the Earth's axis and shape of the Earth's orbit around the sun (see Milankovitch cycles). These orbital changes modify the total amount of sunlight reaching the Earth by up to 25% at mid-latitudes (from 400 to 500 Wm−2 at latitudes of 60 degrees). In this context, the term "forcing" signifies a physical process that affects the Earth's climate. This mechanism is believed to be responsible for the timing of the ice age cycles. A strict application of the Milankovitch theory does not allow the prediction of a "sudden" ice age (sudden being anything under a century or two), since the fastest orbital period is about 20,000 years.

Ice age
2 months ago

Ice age ... changes in orbital forcing suggest that the next glacial period would begin at least 50,000 years from now. Moreover, anthropogenic forcing from increased...

Orbit
5 months ago

Orbit ... (out of the orbital plane) causes rotation of the orbital plane without changing the period or eccentricity. In all instances, a closed orbit will still...

100,000-year problem
4 months ago

100,000-year problem ... ("100 ky problem", "100 ka problem") of the Milankovitch theory of orbital forcing refers to a discrepancy between the reconstructed geologic temperature...

Milankovitch cycles
5 months ago

Milankovitch cycles ... variation in the solar radiation reaching the Earth, and that this orbital forcing strongly influenced the Earth's climatic patterns. Similar astronomical...

Marl
6 months ago

Marl ... related to multiple sea drawdown have been correlated with Milankovitch orbital forcing. Marl as lacustrine sediment is common in post-glacial lake-bed sediments...

Global cooling
5 months ago

Global cooling ... of extensive glaciation, due to the cooling effects of aerosols and orbital forcing. Some press reports in the 1970s speculated about continued cooling;...

Orbital eccentricity
5 months ago

Orbital eccentricity ... astrodynamics, the orbital eccentricity of an astronomical object is a dimensionless parameter that determines the amount by which its orbit around another...

Atomic orbital
6 months ago

Atomic orbital ... {\displaystyle m_{s}} . The simple names s orbital, p orbital, d orbital, and f orbital refer to orbitals with angular momentum quantum number ℓ = 0, 1, 2...

Orbit of the Moon
4 months ago

Orbit of the Moon ... in that its orbit is close to the ecliptic plane instead of to its primary's (in this case, Earth's) equatorial plane. The Moon's orbital plane is inclined...

Radiative forcing
5 months ago

Radiative forcing ... be characterized by net-zero radiative forcing and by a planetary equilibrium temperature. Radiative forcing on Earth is meaningfully evaluated at the...

List of orbits
5 months ago
Little Ice Age
6 months ago
Boeing X-37
6 months ago
Orbit (anatomy)
6 months ago
Tipping points in the climate system
4 months ago
Paleocene–Eocene Thermal Maximum
5 months ago
Circular orbit
6 months ago
Orbital decay
6 months ago
Geostationary orbit
6 months ago
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