Temporal variations in the frequency of thunderstorm days in Tabriz and its relationship with sunspots frequency and global atmospheric Co2 concentration

2021 ◽  
Author(s):  
Yousef Ghavidel ◽  
Mahdi Shojaei ◽  
Manuchehr Farajzadeh
Keyword(s):  
Co2 Concentration ◽  
Temporal Variations ◽  
Atmospheric Co2 ◽  
Atmospheric Co2 Concentration

Temporal variations of atmospheric CO2 concentration in a temperate deciduous forest in central Japan

Tellus B ◽  
2003 ◽  
Vol 55 (2) ◽  
pp. 232-243 ◽  
Author(s):  
SHOHEI MURAYAMA ◽  
NOBUKO SAIGUSA ◽  
DOUGLAS CHAN ◽  
SUSUMU YAMAMOTO ◽  
HIROAKI KONDO ◽  
...  
Keyword(s):  
Deciduous Forest ◽  
Co2 Concentration ◽  
Temporal Variations ◽  
Atmospheric Co2 ◽  
Temperate Deciduous Forest ◽  
Central Japan ◽  
Atmospheric Co2 Concentration ◽  
Temperate Deciduous

Temporal variations of atmospheric CO2 concentration in a temperate deciduous forest in central Japan

Tellus B ◽  
2003 ◽  
Vol 55 (2) ◽  
pp. 232-243 ◽  
Author(s):  
Shohei Murayama ◽  
Nobuko Saigusa ◽  
Douglas Chan ◽  
Susumu Yamamoto ◽  
Hiroaki Kondo ◽  
...  
Keyword(s):  
Deciduous Forest ◽  
Co2 Concentration ◽  
Temporal Variations ◽  
Atmospheric Co2 ◽  
Temperate Deciduous Forest ◽  
Central Japan ◽  
Atmospheric Co2 Concentration ◽  
Temperate Deciduous

The effects of elevated atmospheric CO2 concentration on the biological control of invasive aquatic weeds

2020 ◽  
pp. 103348
Author(s):  
Nompumelelo C. Baso ◽  
Julie A. Coetzee ◽  
Brad S. Ripley ◽  
Martin P. Hill
Keyword(s):  
Biological Control ◽  
Co2 Concentration ◽  
Atmospheric Co2 ◽  
Aquatic Weeds ◽  
Elevated Atmospheric Co2 ◽  
Atmospheric Co2 Concentration

scholarly journals Response of simulated burned area to historical changes in environmental and anthropogenic factors: a comparison of seven fire models

2019 ◽  
Vol 16 (19) ◽  
pp. 3883-3910 ◽  
Author(s):  
Lina Teckentrup ◽  
Sandy P. Harrison ◽  
Stijn Hantson ◽  
Angelika Heil ◽  
Joe R. Melton ◽  
...  
Keyword(s):  
Land Use ◽  
Co2 Concentration ◽  
Fire Regimes ◽  
Atmospheric Co2 ◽  
Anthropogenic Factors ◽  
Burned Area ◽  
Earth System ◽  
Atmospheric Co2 Concentration ◽  
Fire Models ◽  
The Impact

Abstract. Understanding how fire regimes change over time is of major importance for understanding their future impact on the Earth system, including society. Large differences in simulated burned area between fire models show that there is substantial uncertainty associated with modelling global change impacts on fire regimes. We draw here on sensitivity simulations made by seven global dynamic vegetation models participating in the Fire Model Intercomparison Project (FireMIP) to understand how differences in models translate into differences in fire regime projections. The sensitivity experiments isolate the impact of the individual drivers on simulated burned area, which are prescribed in the simulations. Specifically these drivers are atmospheric CO2 concentration, population density, land-use change, lightning and climate. The seven models capture spatial patterns in burned area. However, they show considerable differences in the burned area trends since 1921. We analyse the trajectories of differences between the sensitivity and reference simulation to improve our understanding of what drives the global trends in burned area. Where it is possible, we link the inter-model differences to model assumptions. Overall, these analyses reveal that the largest uncertainties in simulating global historical burned area are related to the representation of anthropogenic ignitions and suppression and effects of land use on vegetation and fire. In line with previous studies this highlights the need to improve our understanding and model representation of the relationship between human activities and fire to improve our abilities to model fire within Earth system model applications. Only two models show a strong response to atmospheric CO2 concentration. The effects of changes in atmospheric CO2 concentration on fire are complex and quantitative information of how fuel loads and how flammability changes due to this factor is missing. The response to lightning on global scale is low. The response of burned area to climate is spatially heterogeneous and has a strong inter-annual variation. Climate is therefore likely more important than the other factors for short-term variations and extremes in burned area. This study provides a basis to understand the uncertainties in global fire modelling. Both improvements in process understanding and observational constraints reduce uncertainties in modelling burned area trends.

scholarly journals Root growth and function of three Mojave Desert grasses in response to elevated atmospheric CO2 concentration

2000 ◽  
Vol 145 (2) ◽  
pp. 245-256 ◽  
Author(s):  
C. K. YODER ◽  
P. VIVIN ◽  
L. A. DEFALCO ◽  
J. R. SEEMANN ◽  
R. S. NOWAK
Keyword(s):  
Root Growth ◽  
Mojave Desert ◽  
Co2 Concentration ◽  
Atmospheric Co2 ◽  
Elevated Atmospheric Co2 ◽  
Atmospheric Co2 Concentration ◽  
And Function ◽  
Desert Grasses
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