Morice, C. P., Kennedy, J. J., Rayner, N. A. & Jones, P. D. Quantifying uncertainties in global and
regional temperature change using an ensemble of observational estimates: the HadCRUT4 dataset.
Forcing changes of similar magnitude, due to water vapour variations, are measurable as
regional temperature changes in Europe, see Philipona, but aerosol changes are not...
The argument against this should be obvious, such a small group may be non-representative
of regional temperature changes, and instead reflective of other environmental factors that impacted the individual trees and groups of trees.
The largest
normalized regional temperature changes occur during DJF and are located over much of the Arctic for both high - end and non-high-end models (figure 1a, b) and have very similar magnitudes.
A new paper Global Signatures and Dynamical Origins of the Little Ice Age and Medieval Climate Anomaly (Mann et al 2009)(see here for press release) addresses this question, focusing on
regional temperature change during the Medieval Warm Period and Little Ice Age.
«After the records for the same location are combined into a single time series, the resulting data set is used to
estimate regional temperature change on a grid with 2Â ° x2Â ° resolution.
Also, the term «global pattern of warming»
implies regional temperature change, which pushes the climate system response discussion to a much higher level of complexity than when simply talking about changes in global - mean climate.
The magnitude and timing of this temperature shift are similar to those of nearby Lake Malawi (14), indicating that our TEX86 record
captures regional temperature change in tropical southeast Africa during deglaciation.
In this study, more than 1000 tree - ring, ice core, coral, sediment and other assorted proxy records spanning both hemispheres were used to
construct regional temperature change over the past 1500 years.
In JJA, the largest differences in normalized
regional temperature changes between the high - end and non-high-end members occur over land and are mostly confined to smaller areas between 45 ° N and 45 ° S (figure 2a, b).
In honor of World Oceans Day, the World Wildlife Fund is showcasing five incredible marine species who have adapted to life in the Arctic's frigid waters and are especially susceptible to
regional temperature change.
Joint attribution involves attribution of significant changes in a natural or managed system to
regional temperature changes, and attribution of a significant fraction of the regional temperature change to human activities.
However,
regional temperature changes are quite large.
Morice, C. P., J. J. Kennedy, N. A. Rayner, and P. D. Jones (2012), Quantifying uncertainties in global and
regional temperature change using an ensemble of observational estimates: The HadCRUT4 dataset, J. Geophys.
Climate impact studies often assess changes in response to
regional temperature change, which can differ significantly from changes in global mean temperature.
In other words,
regional temperatures change, but the average global temperature doesn't.
Stott found that
regional temperature changes could also be traced back to anthropogenic global warming.
Quantifying uncertainties in global and
regional temperature change using an ensemble of observational estimates: The HadCRUT4 data set
With both stabilisation profiles, there were significant reductions in
the regional temperature changes but the significance of the regional precipitation changes depended on location and season.
Morice, C. P., Kennedy, J. J., Rayner, N. A. & Jones, P. D. Quantifying uncertainties in global and
regional temperature change using an ensemble of observational estimates: the HadCRUT4 data set.