The effects of moisture on nonlinear baroclinic eddies are examined in the context of a horizontally homogeneous two-layer quasigeostrophic model. Using an explicit equation for moisture and a simple parameterization of latent heat release, the present study focuses on how moisture affects the statistically steady state of a baroclinically unstable flow. It is shown that, when latent heating is...

A field experiment was conducted on varietal response of white yam to moisture regime in Abeokuta. The comprised three varieties (Efuru, Ise-osi and Oniyere), mulching options (grass, polythene unmulched), two planting dates (early late). Treatments were replicated times using RCBD lay-out. Model for selecting date involved relating potential evapotranspiration (PE) precipitation (P) the form 0...

6 [1] Soil moisture is a critical element in the hydrological cycle especially in a semiarid 7 or arid region. Point measurement to comprehend the soil moisture distribution 8 contiguously in a vast watershed is difficult because the soil moisture patterns might 9 greatly vary temporally and spatially. Space-borne radar imaging satellites have been 10 popular for they may exhibit all-weather ob...

The effect on Atlantic overturning of changes in zonal and meridional atmospheric moisture transports is investigated. Zonal transports are considered in terms of net moisture export from the Atlantic sector. Meridional transports are related to vigour of the global hydrological cycle. The equilibrium thermohaline circulation (THC) simulated with an efficient climate model is strongly dependent...

Black willow ( Salix nigra ) uses periodic flood events for dispersal of vegetative propagules, subjecting them to periods of soaking before their deposition along the streambank. It was hypothesized that this life history trait results in optimal conditions for willow growth and survival. To test this hypothesis, a greenhouse experiment was conducted using 1.2-m-long black willow cuttings (pos...

Vertical soil moisture profiles based on the principle of maximum entropy (POME) were validated using field and model data and applied to guide an irrigation cycle over a maize field in north central Alabama (USA). The results demonstrate that a simple two-constraint entropy model under the assumption of a uniform initial soil moisture distribution can simulate most soil moisture profiles that ...

We measured CH4 fluxes from three major plant communities characteristic of alpine tundra in the Colorado Front Range. Plant communities in this ecosystem are determined by soil moisture regimes induced by winter snowpack distribution. Spatial patterns of CH4 flux during the snow-free season corresponded roughly with these plant communities. In Carex-dominated meadows, which receive the most mo...

This paper explores the environmental factors that drive the southern California chaparral fire regime. Specifically, we examined the response of three fire regime metrics (fire size distributions, fire return interval maps, cumulative total area burned) to variations in the number of ignitions, the spatial pattern of ignitions, the number of Santa Ana wind events, and live fuel moisture, using...