How temperature-dependent silicate weathering acts as Earth's geological thermostat

SL Brantley, A Shaughnessy, MI Lebedeva… - Science, 2023 - science.org
Earth's climate may be stabilized over millennia by solubilization of atmospheric carbon
dioxide (CO2) as minerals weather, but the temperature sensitivity of this thermostat is …

Forest vulnerability to drought controlled by bedrock composition

RP Callahan, CS Riebe, LS Sklar, S Pasquet… - Nature …, 2022 - nature.com
Forests are increasingly threatened by climate-change-fuelled cycles of drought, dieback
and wildfires. However, for reasons that remain incompletely understood, some forest stands …

The catastrophic effects of groundwater intensive exploitation and Megadrought on aquifers in Central Chile: Global change impact projections in water resources …

J Jódar, J Urrutia, C Herrera, E Custodio… - Science of the Total …, 2024 - Elsevier
Central Chile is undergoing its most severe drought since 2010, affecting ecosystems, water
supply, agriculture, and industrial uses. The government's short-term measures, such as …

Influence of micro-scale factors in weathering and elements mobility: Evidence from a comparative study of granite and basalt weathering profiles across India

KM Ghasera, SA Rashid - Catena, 2024 - Elsevier
In an attempt to constrain the micro-scale factors during weathering, large number of
samples from four weathering profiles developed on granite and basalt rocks under different …

Geologic and tectonic controls on deep fracturing, weathering, and water flow in the central California Coast Range

RP Callahan, MH Huang, A Donaldson… - Geophysical …, 2024 - Wiley Online Library
The creation of fractures in bedrock dictates water movement through the critical zone,
controlling weathering, vadose zone water storage, and groundwater recharge. However …

[HTML][HTML] Recently fixed carbon fuels microbial activity several meters below the soil surface

A Scheibe, CA Sierra, M Spohn - Biogeosciences, 2023 - bg.copernicus.org
Abstract The deep soil,> 1 m, harbors a substantial share of the global microbial biomass.
Currently, it is not known whether microbial activity several meters below the surface is …

[HTML][HTML] The story of a summit nucleus: hillslope boulders and their effect on erosional patterns and landscape morphology in the Chilean Coastal Cordillera

E Lodes, D Scherler, R van Dongen… - Earth Surface …, 2023 - esurf.copernicus.org
While landscapes are broadly sculpted by tectonics and climate, on a catchment scale,
sediment size can regulate hillslope denudation rates and thereby influence the location of …

Hydrological and geological controls for the depth distribution of dissolved oxygen and iron in silicate catchments

I Osorio‐Leon, C Bouchez, E Chatton… - Water Resources …, 2023 - Wiley Online Library
Dissolved Oxygen (DO) plays a key role in reactive processes and microbial dynamics in the
critical zone. Recent observations showed that fractures can provide rapid pathways for …

Combined seismic and borehole investigation of the deep granite weathering structure—Santa Gracia Reserve case in Chile

R Trichandi, K Bauer, T Ryberg… - Earth Surface …, 2022 - Wiley Online Library
Imaging the critical zone at depth, where intact bedrock transforms into regolith, is critical in
understanding the interaction between geological and biological processes. We acquired a …

[HTML][HTML] Shear-wave velocity imaging of weathered granite in La Campana (Chile) from Bayesian inversion of micro-tremor H/V spectral ratios

R Trichandi, K Bauer, T Ryberg, B Wawerzinek… - Journal of Applied …, 2023 - Elsevier
Subsurface imaging of the regolith layer is an important tool for weathering zone
characterization. For example, the extent of bedrock modification by weathering processes …