The problem is that most weather station records are not kept for monitoring long term temperature trends. (globalwarmingsolved.com)
Anticipating that the influence of the aerosol forcing is strongest for longer term temperature trends in summer, application of the detection and attribution test to the latest observed 50 - y trend pattern of summer temperature yielded statistical consistency with the greenhouse gas - plus - aerosol simulation with respect to both the pattern and amplitude of the signal. (link.springer.com)
But all of the kerfuffle over the Mail story and the endless discussions over short and long term temperature trends hides what people are actually arguing about — what is likely to happen in the future, rather than what has happened in the past. (realclimate.org)