On top of a record-setting month in the tropics, September 2009 was also the second warmest September on record both globally and in the Northern Hemisphere.
"Who would have predicted those temperatures in the atmosphere when the sea surface temperature has been bumping along so nonchalantly?" Christy asked.
Normally, warming in the atmosphere during an El Nino is somewhat linked to rising sea surface temperatures in the Equatorial Pacific. Atmospheric temperatures in September, however, were significantly warmer than might have been predicted based on sea surface temps.
"Sea surface temps for September in a key region of the Pacific were on the order of 0.83 C warmer than average, and the tropical atmosphere was 0.51 C warmer than seasonal norms," Christy said. "We've seen water temps about this warm twice in the past decade (2004-2005 and 2006-2007) without seeing this surge in the atmosphere.
"If you go back to the big El Nino of 1997-1998, sea surface temps (SSTs) in September 1997 in that same part of the Pacific were about 2.29 C warmer than normal, but the tropical atmosphere was only 0.4 C above average.
"Other things drive atmospheric temperatures in addition to SSTs, so it seems this would have been a warm September even without the El Nino."
Bands of air warmer than seasonal norms circled the Equator in September, while also cover much of the Central Pacific, Northern and Southeastern Asia, and Africa. Warmer air stretched in one wide band from the Antarctic across Australia, the Philippines, China and Siberia into the Arctic.
Compared to seasonal norms, the warmest air (as much as 5.5 C warmer than season norms) covered most of Canada -- although some ski resorts in portions of the Western U.S. are opening at the earliest dates on record.
Global climate trend since Nov. 16, 1978: +0.13 C per decade
September temperatures (preliminary)Global composite temp.: +0.42 C (about 0.76 degrees Fahrenheit) above
Dr. John Christy | Newswise Science News
NASA looks to solar eclipse to help understand Earth's energy system
21.07.2017 | NASA/Goddard Space Flight Center
Scientists shed light on carbon's descent into the deep Earth
19.07.2017 | European Synchrotron Radiation Facility
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....
A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...
Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision
Friction: what you want from car brakes, otherwise rather a nuisance. In any case, it is useful to know as precisely as possible how friction phenomena arise –...
21.07.2017 | Event News
19.07.2017 | Event News
12.07.2017 | Event News
21.07.2017 | Earth Sciences
21.07.2017 | Power and Electrical Engineering
21.07.2017 | Physics and Astronomy