scholarly journals Evidences of Widespread Cretaceous Deep Weathering and Its Consequences: A Review

2016 ◽  
Vol 5 (2) ◽  
pp. 69 ◽  
Author(s):  
Timothy Bata
Keyword(s):  
Climatic Condition ◽  
Atmospheric Co2 ◽  
Present Value ◽  
Weathering Processes ◽  
Greenhouse Climate ◽  
Temperature And Humidity ◽  
Co2 Level

This study highlights the effect of the Cretaceous greenhouse climate on weathering processes. Atmospheric CO2 level was relatively higher in the Cretaceous than it was in both the Jurassic and the Cenozoic. Consequently, temperature and humidity were higher in the Cretaceous than in the Jurassic and the Cenozoic. The interaction among the high levels of atmospheric CO2, extreme global warmth, and humidity in the Cretaceous resulted in widespread deep weathering. Cretaceous palaeo-weathering profiles are observed to occur at higher palaeolatitudes relative to the Jurassic and Cenozoic palaeo-weathering profiles. This implies the upward warming of the Cretaceous palaeolatitude, consistent with palaeotemperature estimates for the Cretaceous. The present thickness of weathering profiles in some selected tropical zones is approximately 200 m. During the greenhouse climatic condition in the Cretaceous, the thickness of weathering profiles at those areas could have been up to 4–5 times the present value. This suggests that many sediments were produced from the Cretaceous weathering events.

Degradation of Kresoxim-Methyl in Water: Impact of Varying pH, Temperature, Light and Atmospheric CO2 Level

2015 ◽  
Vol 96 (1) ◽  
pp. 130-136 ◽  
Author(s):  
Ashish Khandelwal ◽  
Suman Gupta ◽  
Vijay T. Gajbhiye ◽  
Eldho Varghese
Keyword(s):  
Atmospheric Co2 ◽  
Water Impact ◽  
Co2 Level

A breath of fresh air for atmospheric CO2 utilisation: plasmon-assisted preparation of cyclic carbonate at ambient conditions

2021 ◽  
Author(s):  
Olga Guselnikova ◽  
Pavel S Postnikov ◽  
Jiri Kosina ◽  
Zdenka Kolska ◽  
Andriy Trelin ◽  
...  
Keyword(s):  
21St Century ◽  
Cyclic Carbonate ◽  
Atmospheric Co2 ◽  
Advanced Materials ◽  
Ambient Conditions ◽  
Global Problem ◽  
Co2 Level ◽  
Co2 Utilisation

The increase of CO2 level becomes a global problem of 21st century leading to the actual request for new advanced materials and methods of CO2 utilisation. Here, we propose the...

Leaf traits of long-ranging Paleogene species and their relationship with depositional facies, climate and atmospheric CO2 level

2019 ◽  
Vol 298 (4-6) ◽  
pp. 93-172 ◽  
Author(s):  
Karolin Moraweck ◽  
Michaela Grein ◽  
Wilfried Konrad ◽  
Jiří Kvaček ◽  
Johanna Kova-Eder ◽  
...  
Keyword(s):  
Leaf Traits ◽  
Atmospheric Co2 ◽  
Depositional Facies ◽  
Co2 Level

scholarly journals Lithium and Lithium Isotopes in Earth’s Surface Cycles

Elements ◽  
2020 ◽  
Vol 16 (4) ◽  
pp. 253-258 ◽  
Author(s):  
Philip A.E. Pogge von Strandmann ◽  
Simone A. Kasemann ◽  
Josh B. Wimpenny
Keyword(s):  
Climate Change ◽  
Atmospheric Co2 ◽  
Silicate Weathering ◽  
Lithium Isotope ◽  
Climatic Warming ◽  
Pore Waters ◽  
Lithium Isotopes ◽  
Weathering Processes ◽  
Isotope Evidence ◽  
Clay Formation

Lithium and its isotopes can provide information on continental silicate weathering, which is the primary natural drawdown process of atmospheric CO2 and a major control on climate. Lithium isotopes themselves can help our understanding of weathering, via globally important processes such as clay formation and cation retention. Both these processes occur as part of weathering in modern surface environments, such as rivers, soil pore waters, and groundwaters, but Li isotopes can also be used to track weathering changes across major climate-change events. Lithium isotope evidence from several past climatic warming and cooling episodes shows that weathering processes respond rapidly to changes in temperature, meaning that weathering is capable of bringing climate back under control within a few tens of thousands of years.

Sign in / Sign up

Export Citation Format

Share Document