scholarly journals Modeling on Regional Atmosphere-Soil-Land Plant Carbon Cycle Dynamic System

2016 ◽  
Vol 8 (4) ◽  
pp. 303
Author(s):  
Min Fu ◽  
Lixin Tian ◽  
Gaogao Dong ◽  
Ruijin Du ◽  
Peipei Zhou ◽  
...  
Keyword(s):  
Carbon Cycle ◽  
Dynamic System ◽  
Land Plant

Explicit solution of fractional order atmosphere-soil-land plant carbon cycle system

2021 ◽  
Vol 48 ◽  
pp. 100966
Author(s):  
Tanfer Tanriverdi ◽  
Haci Mehmet Baskonus ◽  
Adnan Ahmad Mahmud ◽  
Kalsum Abdulrahman Muhamad
Keyword(s):  
Carbon Cycle ◽  
Fractional Order ◽  
Explicit Solution ◽  
Land Plant ◽  
Cycle System

scholarly journals Global significance of the carbon cycle in the karst dynamic system: evidence from geological and ecological processes

China Geology ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 17-27 ◽  
Author(s):  
Jian-hua Cao ◽  
◽  
Xia Wu ◽  
Fen Huang ◽  
Bill Hu ◽  
...  
Keyword(s):  
Carbon Cycle ◽  
Dynamic System ◽  
Ecological Processes

scholarly journals δ13C of terrestrial vegetation records Toarcian CO2 and climate gradients

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Wolfgang Ruebsam ◽  
Matías Reolid ◽  
Lorenz Schwark
Keyword(s):  
Global Warming ◽  
Carbon Cycle ◽  
Carbon Isotopes ◽  
Stable Carbon Isotopes ◽  
Land Plant ◽  
Terrestrial Vegetation ◽  
Climate Gradients ◽  
Plant Fossils ◽  
Carbon Isotope Excursion ◽  
Main Carbon

AbstractThroughout Earth’s history, variations in atmospheric CO2 concentration modulated climate. Understanding changes in atmospheric carbon cycle is therefore pivotal in predicting consequences of recent global warming. Here, we report stable carbon isotopes (δ13C) of molecular land plant fossils complemented by bulk organic and inorganic carbon fractions for early Toarcian (Early Jurassic) sediments that coincided with global warming and a carbon cycle perturbation. The carbon cycle perturbation is expressed by a negative excursion in the δ13C records established for the different substrates. Based on differences in the magnitude of the carbon isotope excursion recorded in land plants and marine substrates we infer that the early Toarcian warming was paralleled by an increase in atmospheric CO2 levels from ~500 ppmv to ~1000 ppmv. Our data suggest that rising atmospheric CO2 levels resulted from the injection of  12C-enriched methane and its subsequent oxidation to CO2. Based on the cyclic nature of the CIE we concluded that methane was released from climate sensitive reservoirs, in particular permafrost areas. Moderate volcanic CO2 emissions led to a destabilization of the labile permafrost carbon pool triggering the onset of Toarcian climate change only. The main carbon cycle perturbation then subsequently was driven by a self-sustained demise of a carbon-rich cryosphere progressing from mid to high latitudes as reflected by latitudinal climate gradients recorded in land plant carbon isotopes.

Land plant evolution decreased, rather than increased, weathering rates

Geology ◽  
2019 ◽  
Vol 48 (1) ◽  
pp. 29-33 ◽  
Author(s):  
Michael P. D’Antonio ◽  
Daniel E. Ibarra ◽  
C. Kevin Boyce
Keyword(s):  
Organic Carbon ◽  
Carbon Cycle ◽  
Land Plant ◽  
Plant Evolution ◽  
Land Plants ◽  
Silicate Weathering ◽  
Weathering Rates ◽  
Carbon Burial ◽  
Land Plant Evolution ◽  
Volcanic Outgassing

Abstract The repeated evolution of trees is widely thought to have enhanced the capacity of silicate weathering via the impact of deep rooting. However, land plants are also responsible for wetland assembly and organic carbon burial. The total burial output of carbon via both organic and inorganic deposition must balance input to the exogenic system from volcanic outgassing on million-year time scales. Increased partitioning of carbon burial toward organic carbon and away from inorganic carbon reduces the marine carbonate burial flux, necessitating a lowered total flux of alkalinity to the oceans to maintain mass balance in the Earth’s surface carbon cycle. This flux includes the nutrient delivery from the terrestrial vegetation implicated as a driver of marine evolution, extinction, and environmental change including anoxia and black shale formation. Here, the burial of terrestrial organic carbon, first substantially in the Devonian and continuing through to the present, is argued to require a reduction in silicate weathering rates when compared to earlier times, given the independence of volcanic outgassing from weathering on short time scales. Land plants still may cause reductions in steady-state atmospheric CO2 levels, but via increasing the silicate weathering feedback strength, not silicate weathering rates. The mass-balance constraints on the long-term carbon cycle provide a mechanism for linking how land plant evolution simultaneously increased nutrient recycling and weathering efficiency of the Earth’s surface.

Karst dynamic system and the carbon cycle

2016 ◽  
Vol 60 (2) ◽  
pp. 35-55 ◽  
Author(s):  
Jianhua Cao ◽  
Bill Hu ◽  
Chris Groves ◽  
Fen Huang ◽  
Hui Yang ◽  
...  
Keyword(s):  
Carbon Cycle ◽  
Dynamic System
Sign in / Sign up

Export Citation Format

Share Document