Integrated models,scenarios and dynamics of climate,land use and common birds

Reconciling food, fiber and energy production with biodiversity conservation is among the greatest challenges of the century, especially in the face of climate change. Model-based scenarios linking climate, land use and biodiversity can be exceptionally useful tools for decision support in this context. We present a modeling framework that links climate projections, private land use decisions including farming, forest and urban uses and the abundances of common birds as an indicator of biodiversity. Our major innovation is to simultaneously integrate the direct impacts of climate change and land use on biodiversity as well as indirect impacts mediated by climate change effects on land use, all at very fine spatial resolution. In addition, our framework can be used to evaluate incentive-based conservation policies in terms of land use and biodiversity over several decades. The results for our case study in France indicate that the projected effects of climate change dominate the effects of land use on bird abundances. As a conservation policy, implementing a spatially uniform payment for pastures has a positive effect in relatively few locations and only on the least vulnerable bird species.     

Ozone UV spectroscopy. II. Absorption cross-sections and temperature dependence

Absolute absorption cross-sections of ozone have been measured at five temperatures (218–295 K) in the UV wavelength region corresponding to the Hartley and Huggins bands (195–345 nm). The aim is to give to the users, a coherent set of data determined under high resolution. A comparison with previous work has been made.     

Absorption Spectra Measurements for the Ozone Molecule in the 350–830 nm Region

Absolute absorption cross-sections of ozone have been measured at ambient (295 K) and low temperature (218 K) in the visible region corresponding to the Chappuis bands. The temperature effect has been studied and found to be very small. The minimum of the absorption between the Hartley and the Chappuis bands is observed for the first time at 377,5 nm.     

Reheating Temperature from D-Term Cosmological Inflation Braneworld

The D-term inflation in supergravity, in the braneworld Randall Sundrum II (RSII) context, has been proposed to solve some problems related to the four-dimensional inflation model. That scenario is based on a modification of the Friedmann equation by the addition of the fifth dimension, which corresponds to an energy, called brane tension λ. Therefore, we propose the investigation of the brane effect on the reheating epoch. In this context, we have analyzed the process of reheating and focused on the variation of the temperature value T_re. We found that it depends on all parameters, and the value found is in the range T_re ∼ (7.5 × 10⁸−8 × 10¹⁰) GeV, which is consistent with the thermal leptogenesis (T_re ≥ 10⁸ GeV).