7Be and 210Pb total deposition fluxes at New Haven, Connecticut and at Bermuda.

The 210Pb flux has remained virtually constant at New Haven from 1973 to 1978, the flux in the 1977-1978 period being 1.2 dpm/cm2/y. The 210Pb flux at Bermuda is 0.69 dpm/cm2/y. This lower flux than expected from model calculations is due to the establishment of a blocking high pressure cell during the summer which deflects continental air. The 7Be fluxes at New Haven and Bermuda are 22.7 and 17.1 dpm/cm2/y, values consistent with western North Atlantic oceanic standing crop measurements, but higher than some other estimates

Temporal and spatial variability of shallow soil moisture across four planar hillslopes on a tropical ocean island, San Cristóbal, Galápagos

Study region: This paper provides a summary of findings from temporal and spatial studies of soil water content on planar hillslopes across the equatorial island of San Cristóbal, Galápagos (Ecuador). Study focus: Soil water content (SWC) was measured to generate temporal and spatial records to determine seasonal variation and to investigate how the behavior of surface and near-surface root-zone soil water may support island-wide hydrogeology models. SWC probes were installed at four weather stations in a climosequence to generate a temporal record, and spatial surveys of shallow SWC across the selected sites were completed during wet and dry seasons. Temporal differences in SWC were driven by seasonal variations in rainfall and evapotranspiration, while spatial variability remained high during both wet and dry seasons. Unsaturated hydraulic conductivity determined by mini-disk infiltrometers was highly variable across the slopes, as were other hydrologic variables. New hydrological insights for the region: The high heterogeneity of soil water and hydrologic characteristics provides a means to explain why little runoff is observed at the study sites: soils do not saturate uniformly across hillslopes, allowing for runoff generated in one part of the hillslope to be conducted into the soil in adjacent parts of the hillslope. The lack of connected surface runoff helps explain how water enters the groundwater system of the island

Recent sedimentation and mass accumulation rates based on 210Pb along the Peru–Chile continental margin

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