Science Seminars

11/02/2016 – Jae N. Lee; The Warmest Boreal Spring and Summer as Observed by AIRS

Speaker: Jae N. Lee (University of Maryland, NASA Goddard Space Flight Center)
Date: Monday, Nov 02, 2020
Time: 4:00 PM
Location: SPSC W120

Seminar Abstract:

Globally, December 2015 through February 2016 contains the warmest winter surface skin and air temperatures in the AIRS observational record. Continuing this trend, the AIRS global surface temperatures of 2016 show the greatest positive anomalies from average during March and August, since AIRS observation begins in September 2002. This warming is particularly significant over the Arctic where the snow and sea ice melt is closely tied to the spring and summer surface temperatures. Unlike in winter 2016, the surface temperature anomaly in Antarctic also shows spring and summer warming and both Arctic and Antarctic leaded the global warming.  Furthermore, the AIRS global mean total precipitable water is highly correlated with surface temperature with 6.9% change of total precipitable water per 1K change in global mean surface air temperature. The earth has indeed been getting warmer and moister over the last 14 years. In this presentation, I will show the global distribution of Average Rates Change (ARCs) of AIRS surface temperatures over the period September 2002 – Aug 2016 and compare them with those from the MERRA2 and GISS TEMP reanalysis. They show a good agreement on the global patterns of the warming and global mean temperature increase. In particular, I will address the significance of the 2016 warming and its relation to stratospheric cooling and a potential vertical fingerprint of global warming.