On the initiation of a snowball earth
The initiation of a snowball Earth event would involve some initial cooling mechanism, which would result in an increase in Earth's coverage of snow and ice. The increase in Earth's coverage of snow and ice would in turn increase Earth's albedo, which would result in positive feedback for cooling. If enough snow and ice accumulates, run-away cooling would result. This positive feedb… WebThe Snowball Earth hypothesis explains the development of glaciation at low latitudes in the Neoproterozoic, as well as the associated iron formations and cap carbonates, in …
On the initiation of a snowball earth
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Web1 de abr. de 2015 · Following Budyko's (1969) early energy balance studies, Kirschvink (1992) proposed the term “Snowball Earth Event” (SEE), to explain the observed Neoproterozoic sediment successions. According to the SEE hypothesis, the whole Earth was covered by a thick layer of ice spreading from the poles to the equator. Web27 de jun. de 2002 · [1] The Snowball Earth hypothesis explains the development of glaciation at low latitudes in the Neoproterozoic, as well as the associated iron formations and cap carbonates, in terms of a runaway ice-albedo feedback leading to a global …
Web9 de jul. de 2010 · PDF On Jul 9, 2010, A. Voigt published Snowball Earth – Initiation and Hadley Cell Dynamics Find, read and cite all the research you need on ResearchGate Webcesses were found to be essential for Snowball Earth initia-tion (Poulsen et al., 2001; Poulsen and Jacob, 2004; Lewis et al., 2003, 2007). Our model includes neither sea-ice …
WebSimilar Items. Initiation of a Marinoan Snowball Earth in a state-of-the-art atmosphere-ocean general circulation model by: Voigt, A., et al. Published: (2024) ; Initiation of a Marinoan Snowball Earth in a state-of-the-art atmosphere-ocean general circulation model by: Voigt, A., et al. Published: (2011) WebInitiation of Snowball Earth with volcanic sulfur aerosol emissions F. A. Macdonald1 & R. Wordsworth2, 1 1 Department of Earth and Planetary Sciences, Harvard University, 20 Oxford Street, Cambridge, Massachusetts 02138, USA 2 Harvard Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, …
WebSnowball Earth Albedo Effect. 867 Words4 Pages. The initiation of a Snowball Earth, involves a cooling mechanism in which an increase in the Earth’s coverage of snow and ice occurs. As mentioned previously, an increase in ice and snow coverage would result in an increase in the reflected fraction of solar radiation known as albedo.
WebTo simulate the initiation of a Snowball Earth, we modify ICON-A to run in the idealized aquaplanet configuration (no continents) proposed by Pierrehumbert et al. (2011). The solar constant is set to 1285 W m −2 to mimic the weaker Neoproterozoic sun. A circular orbit with an obliquity of 23.5° and a 360-day calendar is applied. imdb actress 1.75m born in 1993Web2 content required for Snowball Earth initiation to occur is reduced. The atmospheric CO 2 content at which Snowball Earth initiation occurs is thus increased by 50% in the 3-layer Winton model compared to the 0-layer Semtner model. Overall, these results show that while the sea-ice thickness limit plays only a minor role, a suf- imdb actors working togetherWebA Snowball Earth ensues when sea ice, having reached a critical latitude, advances uncontrollably to the equator through ice-albedo feedback . The time scale of the final sea-ice advance is geologically instantaneous, ~150 years in a 3D ocean GCM coupled to a thermodynamic/dynamic sea-ice model and an energy-moisture balance atmosphere … list of lawyers in los angelesWeb14 de nov. de 2013 · Abstract. We identify the "hard snowball" bifurcation point at which total sea-ice cover of the oceans is expected by employing the comprehensive coupled climate model CCSM3 (Community Climate System Model version 3) for two realistic Neoproterozoic continental configurations, namely a low-latitude configuration … imdb actors from texasWebSnowball Earth Lennart Ramme 1,2 and Jochem Marotzke 1,3 1 Max-Planck-Institute for Meteorology, Hamburg, Germany ... pre-industrial control simulation and to allow snowball initiation and melting at appropriate CO 2 concentrations. The model is run with different time steps for the atmosphere, ... imdb actors from virginiaWeb10 de abr. de 2012 · This study investigates the climate dynamic feedbacks during a transition from the present climate to the extremely cold climate of a ‘‘Snowball Earth’’ using the Community Climate System Model, version 3 (CCSM3). With the land‐sea distributionfixed to modern, it is found that by reducing solar luminosity and/or carbon … list of lawyers in ohioWebAbstract. The Snowball Earth bifurcation, or runaway ice-albedo feedback, is defined for particular boundary conditions by a critical CO 2 and a critical sea-ice cover (SI), both of which are essential for evaluating hypotheses related to Neoproterozoic glaciations. Previous work has shown that the Snowball Earth bifurcation, denoted as (CO 2, SI) *, … imdb actors in their 30s