Physiographic and Climatic Controls on Regional Groundwater Dynamics

Quantifying climatic and tectonic controls on hillslopes

Hillslopes in humid regions are typically convex to concave in profi le and have a relatively thick, continuous regolith cover. Conversely, hillslopes in arid regions are typically cliff-dominated and have a relatively thin, discontinuous regolith cover. The difference between these two end-member slope forms is classically attributed to climate, but climate, tectonics, and lithology all play a...

Regional and Climatic Controls on Seasonal Dust Deposition in the Southwestern US

Vertical dust deposition rates (dust flux) are a complex response to the interaction of seasonal precipitation, wind, changes in plant cover and land use, dust source type, and local vs. distant dust emission in the southwestern U.S. Seasonal dust flux in the Mojave–southern Great Basin (MSGB) deserts, measured from 1999 to 2008, is similar in summer–fall and winter–spring, and antecedent preci...

Groundwater dynamics in subterranean estuaries of coastal unconfined aquifers: Controls on submarine groundwater discharge and chemical inputs to the ocean

Clare E. Robinson, Pei Xin, Isaac R. Santos, Matthew A. Charette, Ling Li, D. A. Barry 1 Department of Civil and Environmental Engineering, Western University, London, Canada 2 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, China National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, Australia 4 Department of Marin...

Groundwater Vulnerability in Different Climatic Zones

Climatic controls of interannual variability in regional carbon fluxes from top‐down and bottom‐up perspectives

[1] Observations of regional net ecosystem exchange (NEE) of CO2 for 1997–2007 were analyzed for climatic controls on interannual variability (IAV). Quantifying IAV of regional (10–10 km) NEE over long time periods is key to understanding potential feedbacks between climate and the carbon cycle. Four independent techniques estimated monthly regional NEE for 10 km in a spatially heterogeneous te...