Mass conservation in global models

Effect of gravitational consistency and mass conservation on seasonal surface mass loading models

[1] Increasingly, models of surface mass loads are used either to correct geodetic time coordinates by removing seasonal and other ‘‘noise’’, or for comparison with other geodetic parameters. However, models of surface loading obtained by simply combining the mass redistribution due to individual phenomena will not in general be selfconsistent, in that (i) the implied global water budget will n...

Models os soil conservation technology adoption in developing countries : the case of iran

Gaps and mismatches between global conservation priorities and spending.

Several international conservation organizations have recently produced global priority maps to guide conservation activities and spending in their own and other conservation organizations. Surprisingly, it is not possible to directly evaluate the relationship between priorities and spending within a given organization because none of the organizations with global priority models tracks how the...

Conservation Law Modeling of Entrainment in Layered Hydrostatic Flows

A methodology is developed for modeling entrainment in two-layer shallow water flows using non-standard conserved quantities, replacing layer-wise mass conservation by global energy conservation. Thus the energy that the standard model would regularly dissipate at internal shocks is instead available to exchange fluid between the layers. Two models are considered for the upper boundary of the f...

Are modern biological invasions an unprecedented form of global change?

The uniqueness of the current, global mass invasion by nonindigenous species has been challenged recently by researchers who argue that modern rates and consequences of nonindigenous species establishment are comparable to episodes in the geological past. Although there is a fossil record of species invasions occurring in waves after geographic barriers had been lifted, such episodic events dif...