Overall, the stimulatory effect of double ambient CO2 on grassland production averages about +17% in ecosystem-based experiments.
His group studied tree rings in 30-year-old Mediterranean oaks growing near geothermal vents that exposed the trees to nearly double the ambient CO2 concentration.
A study in the March 2002 Annals of Allergy, Asthma, and Immunology showed that ragweed grown in an atmosphere with double the ambient level of carbon dioxide produced 61% more pollen than plants grown under ambient conditions.
When a main steam line breaks, it is assumed that the pipe instantaneously breaks completely open to the ambient environment (double-ended guillotine break).
The main objective of this paper is to study how road fences installed at a double-decked road affect ambient air quality, especially, pollutant concentration at some downstream locations.
Contrary to the lighter actinides californium, berkelium, curium and americium which crystallize in a double hexagonal structure at ambient conditions, einsteinium is believed to have a face-centered cubic (fcc) symmetry with the space group Fmm and the lattice constant a = 575 pm.
In a field experiment using open-top chambers to grow individual poplar trees in ambient or doubled atmospheric CO2 concentration, Klironomos et al. (1997) found that air and leaf litter in chambers with doubled CO2 concentration contained significantly more fungal spores than those in ambient chambers.
NaFSI is soluble in the IL up to 55 mol% Na; adding EC (30 wt.%) to the IL almost doubles the ionic conductivity at ambient temperature.
It is based on non-relativistic double scatter of neutrons off ambient protons within a block of scintillating fibers.
Vehicle charging, even for a modest 30% PEV penetration, is found to nearly double peak temperature rise above ambient at the cable surface, increase the daily variance in cable temperatures, and significantly decrease the estimated time to failure for cables with thermally sensitive insulation.
