Sentences with phrase «hemispheric temperature»

One can reasonably wonder whether the key conclusion of Briffa and Osborn 1999 — «[despite] the problems associated with interpreting many of them as unambiguous measures of hemispheric temperature change, this conclusion [MBH] must surely be accepted» — would have stood up if the decline had been shown.

1) in 1998, Mann, then an early career researcher with a background in physics, was celebrated for the first multi-century hemispheric temperature reconstruction with annual resolution.

The earlier data that do exist may be used to construct a very uncertain estimate of Australian temperatures, and may also be used for the construction of global and hemispheric temperature averages on monthly and annual time scales.

Rather, it follows the entire northern hemispheric temperature record, which shows a similar pattern.

Is there a global warming signal in hemispheric temperature series: a structural time series approach

This data shows that the tree rings have a correlation with local temperatures that is much less than the rings have with hemispheric temperatures (explaining only about half as much of the variation).

From A.D. 1,000 to about 1915, the graph depicts a gradual decline in Northern Hemisphere temperatures (the hockey stick handle) followed by an abrupt upturn in hemispheric temperatures during the remainder of the 20th century (the blade).

The patterns of regional climate change are likely to me more useful for understanding mechanisms and intrinsic climate variability than simply the mean hemispheric temperature, which clearly averages over a lot of structure.

Cointegration analysis of hemispheric temperature relations [PDF] RK Kaufmann — J. Geophys.

In Jones et al 1990 it is reported that data for the US showed an urban influence of 0.15 C over the period 1901 - 1984 and that «The results for the United States clearly represent an upper limit to the urban influence on hemispheric temperature trends.»

Put in a two - hemisphere energy - balance model and using observed hemispheric temperature changes and ocean heat uptake changes you can easily arrive at an independent total aerosol forcing estimate - one that also implies small net total aerosol forcings that are reasonably consistent with the latest observatiional findings.

The construction of an annual global or hemispheric temperature average requires a less dense network of stations than is required for a national average.

In particular, reconstructed hemispheric temperatures are demonstrated to be largely unaffected by the use or non-use of PCs to summarize proxy evidence from the data - rich North American region.

Even with the very limited data available and the problems associated with interpreting many of them as unambiguous measures of hemispheric temperature change, this conclusion must surely be accepted.

As satellite - based records are still short in duration, all regional and hemispheric temperature series shown in this section are based on conventional surface - based data sets, except where stated.

This energy flux will have a substantial influence on hemispheric temperatures.

Chronologies developed from sites near to the elevational or latitudinal tree lines often show sensitivity to summer temperature and, because of their annual resolution, absolute dating and relatively widespread nature, they have contributed to many local, continental and hemispheric temperature reconstructions.

Magne Aldrin, Marit Holden, Peter Guttorp, Ragnhild Bieltvedt Skeie, Gunnar Myhre and Terje Koren Berntsen, Bayesian estimation of climate sensitivity based on a simple climate model fitted to observations of hemispheric temperatures and global ocean heat content, Environmetrics, 2012.

Bayesian estimation of climate sensitivity based on a simple climate model fitted to observations of hemispheric temperatures and global ocean heat content

A key factor in identifying the aerosol fingerprint, and therefore the amount of aerosol cooling counteracting greenhouse warming, is the change through time of the hemispheric temperature contrast, which is affected by the different evolution of aerosol forcing in the two hemispheres as well as the greater thermal inertia of the larger ocean area in the SH (Santer et al., 1996b, c; Hegerl et al., 2001; Stott et al., 2006c).

Doing the additions gives a new series, whose correlation with the hemispheric temperatures is 0.52.

So what climatic variables explain the high correlation between the tree rings and hemispheric temperatures?

Bayesian estimation of climate sensitivity based on a simple climate model fitted to observations of hemispheric temperature and global ocean heat content.

The constructions of global and hemispheric temperature averages by international agencies are the most prominent use of the early data.

Still, they include much more persistent excursions of one sign, whether positive or negative in global or hemispheric temperatures, say, than does red noise.