scholarly journals Impact of textural patterns on modeled rock weathering rates and size distribution of weathered grains

2021 ◽  
Author(s):  
Yoni Israeli ◽  
Eyal Salhov ◽  
Simon Emmanuel
Keyword(s):  
Size Distribution ◽  
Rock Weathering ◽  
Weathering Rates

How Plants Enhance Weathering and How Weathering is Important to Plants

Elements ◽  
2019 ◽  
Vol 15 (4) ◽  
pp. 241-246 ◽  
Author(s):  
Stephen Porder
Keyword(s):  
Terrestrial Ecosystems ◽  
Carbon Uptake ◽  
Rock Weathering ◽  
Earth System ◽  
Agricultural Systems ◽  
Carbon Loss ◽  
Weathering Rates ◽  
Environmental Consequences ◽  
The Earth ◽  
Primary Minerals

Since land plants emerged from swampy coastlines over 400 million years ago, they have played a fundamental role in shaping the Earth system. Roots and associated fungi increase rock weathering rates, providing access to nutrients, while altering atmospheric CO2. As soils weather, the dissolution of primary minerals forces plants to rely on recycling and atmospheric deposition of rock-derived nutrients. Thus, for many terrestrial ecosystems, weathering ultimately constrains primary production (carbon uptake) and decomposition (carbon loss). These constraints are most acute in agricultural systems, which rely on mined fertilizer rather than the recycling of organic material to maintain production. Humans now mine similar amounts of some elements as weather out of rocks globally. This increase in supply has myriad environmental consequences.

scholarly journals Controls on rock weathering rates by reaction-induced hierarchical fracturing

2008 ◽  
Vol 275 (3-4) ◽  
pp. 364-369 ◽  
Author(s):  
Anja Røyne ◽  
Bjørn Jamtveit ◽  
Joachim Mathiesen ◽  
Anders Malthe-Sørenssen
Keyword(s):  
Rock Weathering ◽  
Weathering Rates

scholarly journals Rock weathering controls the potential for soil carbon storage at a continental scale

2021 ◽  
Author(s):  
Eric W. Slessarev ◽  
Oliver A. Chadwick ◽  
Noah W. Sokol ◽  
Erin E. Nuccio ◽  
Jennifer Pett-Ridge
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Carbon ◽  
Carbon Storage ◽  
Mineral Weathering ◽  
Rock Weathering ◽  
Weathering Rates ◽  
Primary Mineral ◽  
Organic Carbon Storage ◽  
Primary Minerals

AbstractAs rock-derived primary minerals weather to form soil, they create reactive, poorly crystalline minerals that bind and store organic carbon. By implication, the abundance of primary minerals in soil might influence the abundance of poorly crystalline minerals, and hence soil organic carbon storage. However, the link between primary mineral weathering, poorly crystalline minerals, and soil carbon has not been fully tested, particularly at large spatial scales. To close this knowledge gap, we designed a model that links primary mineral weathering rates to the geographic distribution of poorly crystalline minerals across the USA, and then used this model to evaluate the effect of rock weathering on soil organic carbon. We found that poorly crystalline minerals are most abundant and most strongly correlated with organic carbon in geographically limited zones that sustain enhanced weathering rates, where humid climate and abundant primary minerals co-occur. This finding confirms that rock weathering alters soil mineralogy to enhance soil organic carbon storage at continental scales, but also indicates that the influence of active weathering on soil carbon storage is limited by low weathering rates across vast areas.

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