Friday, August 26, 2016Register

 Texas Climate News subscribe to our mailing list bookmark and share this page

Extreme temperatures expected to change more quickly than average temperature     

When assessing the consequences of climate change for human health and most ecosystems, very high temperatures are much more important than average temperatures. Earlier studies have shown that cold extremes will warm faster than warm extremes and that warm extremes will warm faster than average temperatures. European scientists have published a study focused on extremely high air temperatures, represented by the 100-year return temperature (T100). (T100 is a specific statistical expression that means that every year you have a 1% chance of getting that temperature.) Their results show a projected global-mean temperature increase of 3.5°K by 2100, which is at the upper end of the range given by the models analyzed in the 2007 IPCC-AR4. The authors acknowledge that the present generation of climate models, including the one used in this study, tends to overestimate extreme temperature values. However, even after correcting for this bias, they found that by 2090-2100, projected T100 far exceeds 40°C in Southern Europe and the U.S. Midwest and even reaches 50°C in large parts of the area equatorward of 30°, notably in India and the middle East, and also in most of Australia. The projected T100 values, the authors note, should be taken seriously, since they indicate that potential for dangerously high future temperatures in densely populated areas.

Source: Sterl, A., C. Severijns, H. Dijkstra, W. Hazeleger, G. Jan van Oldenborgh, M. van den Broeke, G. Burgers, B. van den Hurk, P. J. van Leeuwen and P. van Velthoven, 2008. When can we expect extremely high surface temperatures? Geophysical Research Letters, vol. 35, L14703, doi:10.1029/2008GL034071, 5pp.

Hover here, then click toolbar to edit content
Texas Climate News  Bookmark and Share

The Texas Climate Initiative is a project of the Houston Advanced Research Center (HARC) and is directed by Robert Harriss.
Sponsors include generous grants from Houston Endowment, Inc., The Brown Foundation, Inc., Magnolia Charitable Trust and funding from the Endowment for Regional Sustainability Science.
Privacy StatementTerms Of UseCopyright 2009-11 Houston Advanced Research Center

BorderBoxedBlueBoxedGrayBlueSmall width layoutMedium width layoutMaximum width layoutMaximum textMedium textSmall textBack Top!