While the new research didn't answer what led to the particular
atmospheric patterns associated with extreme temperatures, Horton hopes that they can use the
same approach from the study to try to figure that out.
Although most aerosols are carried up by the
same atmospheric circulation
patterns, their chemical and physical properties determine whether or not they become «cloud condensation nuclei,» which are the points around which droplets form before they become cloud droplets.
My point, which I hope you would likewise concede, is that even with a weakened or shut - off THC, western Europe would still remain warm relative to other land masses at the
same latitudes (possibly even warmer than British Columbia, as it is now), based primarily on
atmospheric circulation
patterns.
Increased weed and pest pressure associated with longer growing seasons and warmer winters will be an increasingly important challenge; there are already examples of earlier arrival and increased populations of some insect pests such as corn earworm.64 Furthermore, many of the most aggressive weeds, such as kudzu, benefit more than crop plants from higher
atmospheric carbon dioxide, and become more resistant to herbicide control.72 Many weeds respond better than most cash crops to increasing carbon dioxide concentrations, particularly «invasive» weeds with the so - called C3 photosynthetic pathway, and with rapid and expansive growth
patterns, including large allocations of below - ground biomass, such as roots.73 Research also suggests that glyphosate (for example, Roundup), the most widely - used herbicide in the United States, loses its efficacy on weeds grown at the increased carbon dioxide levels likely to occur in the coming decades.74 To date, all weed / crop competition studies where the photosynthetic pathway is the
same for both species favor weed growth over crop growth as carbon dioxide is increased.72