Results 1 to 10 of about 4,918,557 (342)

Cation isotopes trace chemical weathering [PDF]

Fundamental Research
Chemical weathering of rocks and minerals alters the geochemical compositions of the lithosphere, hydrosphere, and atmosphere over time, regulating Earth's surface temperature by consuming atmospheric CO2 so as to sustain our habitable planet.
Long-Fei Gou, Fang Huang, Shouye Yang, Gangjian Wei, Zhi-Qi Zhao, Zhangdong Jin   +5 more
doaj   +4 more sources

Globally elevated chemical weathering rates beneath glaciers. [PDF]

Nat Commun, 2022
Physical erosion and chemical weathering rates beneath glaciers are expected to increase in a warming climate with enhanced melting but are poorly constrained.
Li X, Wang N, Ding Y, Hawkings JR, Yde JC, Raiswell R, Liu J, Zhang S, Kang S, Wang R, Liu Q, Liu S, Bol R, You X, Li G.   +14 more
europepmc   +2 more sources

Intensified continental chemical weathering and carbon-cycle perturbations linked to volcanism during the Triassic-Jurassic transition. [PDF]

Nat Commun, 2022
Direct evidence of intense chemical weathering induced by volcanism is rare in sedimentary successions. Here, we undertake a multiproxy analysis (including organic carbon isotopes, mercury (Hg) concentrations and isotopes, chemical index of alteration ...
Shen J, Yin R, Zhang S, Algeo TJ, Bottjer DJ, Yu J, Xu G, Penman D, Wang Y, Li L, Shi X, Planavsky NJ, Feng Q, Xie S.   +13 more
europepmc   +2 more sources

Chemical weathering rates and controlling mechanisms of glacial catchments within different climate regimes in the Tibetan Plateau [PDF]

PeerJ, 2023
Background Continental weathering plays an important role in regulating atmospheric CO2 levels. Chemical weathering in glacial areas has become an intensely focused topic in the background of global change compared with other terrestrial weathering ...
Xiao Guo, Zimiao Zhao, Wenjing Liu, Huiguo Sun, Zhifang Xu   +4 more
doaj   +3 more sources

Continental chemical weathering during the Early Cretaceous Oceanic Anoxic Event (OAE1b): a case study from the Fuxin fluvio-lacustrine basin, Liaoning Province, NE China

Journal of Palaeogeography, 2020
This study focuses on Early Cretaceous mudstones from the Shahai and Fuxin formations in the Fuxin continental basin. We analyse chemical weathering, land surface temperatures and palaeoclimates based on chemical weathering indices, and emphasize the ...
Xiao-Tao Xu, Long-Yi Shao, Bo Lan, Shuai Wang, Jason Hilton, Jian-Yi Qin, Hai-Hai Hou, Jie Zhao   +7 more
doaj   +2 more sources

Links between physical and chemical weathering inferred from a 65-m-deep borehole through Earth's critical zone. [PDF]

Sci Rep, 2019
As bedrock weathers to regolith – defined here as weathered rock, saprolite, and soil – porosity grows, guides fluid flow, and liberates nutrients from minerals.
Holbrook WS, Marcon V, Bacon AR, Brantley SL, Carr BJ, Flinchum BA, Richter DD, Riebe CS.   +7 more
europepmc   +2 more sources

Rapid enhancement of chemical weathering recorded by extremely light seawater lithium isotopes at the Permian-Triassic boundary. [PDF]

Proc Natl Acad Sci U S A, 2018
Significance Estimates of seawater Li isotopic composition at the Permian–Triassic boundary (PTB) reveal extremely light seawater Li isotopic signatures accompanying the most severe mass extinction in the history of animal life.
Sun H, Xiao Y, Gao Y, Zhang G, Casey JF, Shen Y.   +5 more
europepmc   +2 more sources

Geochemistry of the dissolved loads during high-flow season of rivers in the southeastern coastal region of China: anthropogenic impact on chemical weathering and carbon sequestration [PDF]

Biogeosciences, 2018
The southeastern coastal region is one of the most developed and populated areas in China. Meanwhile, it has been severely impacted by acid rain over many years.
W. Liu, W. Liu, W. Liu, Z. Xu, Z. Xu, Z. Xu, H. Sun, H. Sun, T. Zhao, T. Zhao, C. Shi, T. Liu   +11 more
doaj   +2 more sources

High potential for weathering and climate effects of non-vascular vegetation in the Late Ordovician [PDF]

Nature Communications, 2016
Early non-vascular vegetation may have caused an interval of glaciations in the Late Ordovician by enhancing global chemical weathering. Here, by simulating the organisms with a spatially explicit, process-based model, the authors propose that Ordovician
P. Porada, T. M. Lenton, A. Pohl, B. Weber, L. Mander, Y. Donnadieu, C. Beer, U. Pöschl, A. Kleidon   +8 more
doaj   +4 more sources

Abrupt response of chemical weathering to Late Quaternary hydroclimate changes in northeast Africa. [PDF]

Sci Rep, 2017
Chemical weathering of silicate rocks on continents acts as a major sink for atmospheric carbon dioxide and has played an important role in the evolution of the Earth’s climate.
Bastian L, Revel M, Bayon G, Dufour A, Vigier N.   +4 more
europepmc   +2 more sources