carbonnitrogen cycle 碳氮循环,碳循环,氮循环 cycle on phr. 轮回速率 cycle by cycle device 逐周装置 energy cycle 能量循环,能量变化周期,生物钟 run in cycle 周期性出现,周而复始,往复无穷 anovulatory cycle 无排卵周期 closed cycle 封闭式循环,闭式循环,回合循环 absorption cycle 吸收循环 cal...
Thekey differencebetween nitrogen cycle and carbon cycle is thatthe nitrogen cycle describes the conversion of nitrogen into multiple chemical forms and the circulation between the atmosphere, terrestrial and marine ecosystems while the carbon cycle describes the movement of carbon and its multiple chemica...
* Describe the short term cycling of carbon through the processes of photosynthesis and respiration. * Identify carbon sinks and carbon sources.* Describe short term and long term storage of carbon.* Describe how human actions interfere with the natural carbon cycle.*...
Deep carbon and nitrogen cycles played a critical role in the evolution of the Earth. Here we report on successful studying of speciation in C-O-H-N systems with low nitrogen contents at 6.3 GPa and 1100 to 1400 °C. AtfO2near Fe–FeO (IW) equilibrium, the synthesised fluids contain...
and global climate change. Of these feedbacks, that between the carbon cycle and climate has recently received much attention. Large quantities of carbon are stored in living vegetation and soil organic matter, and liberation of this carbon into the atmosphere as CO2or methane would have a ...
1 The Deep Nitrogen Cycle on Earth The Earth’s N-cycle links to observations from planetary and extraterrestrial N-reservoirs and to near-surface nutrient cycling and palaeoenvironmental investigations of ancient Earth. Regarding the evolution of the Earth’s atmosphere, a key aspect is whether ...
With the deep investigation on karst carbon cycle, mechanism and carbon sink effect, and the improvement of watershed carbon sink measurement methods and regional sink increase evaluation approaches. Karst carbon sink is expected to be included in the list of atmospheric CO2 sources/sinks of the ...
Thus, soil organic carbon (SOC), total nitrogen (TN), and species richness (SR) were selected as soil-plant system variables, and the tradeoff relationships between SM and these variables and their variations along the precipitation gradient were quantified in the Loess Plateau, China. Results ...
The carbon cycle is typically broken down into two components, both of which will be summarized here. The first is the biological pump, effecting the redistributing of biologically active elements like carbon, nitrogen, and silicon within the circulating waters of the ocean. The second is the ul...
et al. Carbon and nitrogen cycle dynamics in the O-CN land surface model: 2. Role of the nitrogen cycle in the historical terrestrial carbon balance. Glob. Biogeochem. Cycles 24, GB1005 (2010). Article ADS Google Scholar Clark, D. B. et al. The Joint UK Land Environment Simulator (...