Other
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.u42b..02p&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #U42B-02
Other
3305 Climate Change And Variability (1616, 1635, 3309, 4215, 4513), 5405 Atmospheres (0343, 1060), 5430 Interiors (8147), 5480 Volcanism (6063, 8148, 8450), 5749 Origin And Evolution
Scientific paper
We can look beyond the Earth, to Venus and Mars, to find opportunities to understand interactions among crust, mantle, hydrosphere, and atmosphere reservoirs. There has obviously been coupling among some of these reservoirs on other worlds, and in some cases feedback may have been in play but that is more difficult to demonstrate. The massive CO2 atmosphere of Venus has likely fluctuated significantly over its history due to exchange with other reservoirs, with attendant greenhouse effects strongly modulating surface temperature. Additionally, release of H2O and SO2 from large-scale magmatic events may have led to significant surface temperature increases, ΔT0, and the details depend on the competition between IR radiation warming and planetary albedo increase due to cloud formation. Diffusion of Δ T0 into the shallow crust may be responsible for the rapid global formation of compressional wrinkle ridges following widespread volcanic resurfacing [Solomon et al., 1999]. Diffusion of ΔT0 into the venusian upper mantle could have increased the rate of partial melting. The accompanying increase in volatile release to the atmosphere could set up a positive feedback because of increased greenhouse warming diffusing into the planet's interior [Phillips et al., 2001, Venus]. Another outcome of deep penetration of a greenhouse-induced positive ΔT0 is the lowering of mantle viscosity and an accompanying decrease in convective stress, which could shut down an exisiting lithospheric recycling regime [Lenardic et al., 2008]. Mars offers a rich set of possibilities for coupling between reservoirs [Jakosky and Phillips, 2001]. Magmatism at the massive Tharsis volcanic complex possibly induced episodic climate changes in the latter part of the Noachian era (~3.6-4.2 Ga). This could have led to clement conditions, forming valley networks that follow a regional slope caused partly by the mass load of Tharsis itself [Phillips et al., 2001, Mars]. Earlier in the Noachian, lithospheric recycling may have ended as surface temperatures warmed due to planetary outgassing, leading to the Lenardic catastrophe. Outer core convection may have been muted as the mantle heated up, shutting down the martian dynamo [Nimmo and Stevenson, 2000]. In turn, much of the extant atmosphere could have been lost to space, no longer protected from the solar wind by a global magnetic field.
No associations
LandOfFree
Coupled Planetary Reservoirs does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Coupled Planetary Reservoirs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coupled Planetary Reservoirs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1241230