Global warming hiatus Global warming hiatus A global warming hiatus, also sometimes referred to as a global warming pause or a global warming slowdown, is a period of relatively little change in globally averaged surface temperatures. In the current episode of global warming many such 15-year periods appear in the surface temperature record, along with robust evidence of the long-term warming trend. Such a "hiatus" is shorter than the 30-year periods that climate is classically averaged over. Publicity has surrounded claims of a global warming hiatus during the period 1998–2013. The exceptionally warm El Niño year of 1998 was an outlier from the
Aortic hiatus and thus convert the hiatus into a fibrous ring. The hiatus is situated slightly to the left of the mid line, and is bound anteriorly by the crura, and posteriorly by the body of the first lumbar vertebra. Through it passes the aorta, the azygos vein, the thoracic duct, and hemi-azygos vein passes through the left crus. Aortic hiatus The aortic hiatus is a hole in the diaphragm. It is the lowest and most posterior of the large apertures. It is located approximately at the level of the twelfth thoracic vertebra (T12). Strictly speaking, it is not an aperture in