Meteorological Drivers of Cold Temperatures in the Western Pacific TTLDuring the recent October 2016 aircraft sampling mission of the Tropical Tropopause Layer (POSIDON -- Pacific Oxidants, Sulfur, Ice, Dehydration, and cONvection), Western Pacific October TTL temperatures were anomalously cold due to a combination of La Nina conditions and a very stationary convective pattern. POSIDON also had more October Tropical Cyclones than typical, and tropical cyclones have substantial negative TTL temperatures associated with them. This paper investigates how meteorology in the troposphere drives TTL temperatures, and how these temperatures, coupled with the circulation, produce TTL clouds. We will also compare October TTL cloud distributions in different years, examining the relationship of clouds to October temperature anomalies.
Document ID
20170011687
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Pfister, Leonhard (NASA Ames Research Center Moffett Field, CA, United States)
Ueyama, Rei (Bay Area Environmental Research Inst. Moffett Field, CA, United States)
Jensen, Eric J. (NASA Ames Research Center Moffett Field, CA, United States)