WCRP/SPARC SATIO-TCS joint workshop on
Stratosphere-Troposphere Dynamical Coupling
in the Tropics

February 21 (Fri) - 24 (Mon),
at Seminar House of Graduate School of Science, and
February 25 (Tue), 2020,
at Raku-Yu Kaikan,
Kyoto University , Kyoto, Japan

Peter H. Haynes (1), Peter Hitchcock (2),
Matthew H. Hitchman (3), Tieh-Yong Koh (4),
Takatoshi Sakazaki (5), and Shigeo Yoden (5)
(1) U. of Cambridge, (2) Cornell U., (3) U. of Wisconsin-Madison,
(4) Singapore U. of Social Sciences, (5) Kyoto U.

Sponsored by
WCRP/SPARC, YMC, PSTEP, Kyoto University,

    SATIO-TCS (Stratospheric And Tropospheric Influences On Tropical Convective Systems) is an international research activity under WCRP/SPARC (World Climate Research Programme/ Stratosphere-troposphere Processes And their Role in Climate). SATIO-TCS has its focus on stratosphere-troposphere coupling (upward and downward) in the tropics associated with moist convection and its organized systems (see figure at the bottom). There is an increase in reports of observational evidence that stratospheric variations, such as stratospheric sudden warming (SSW) events, the equatorial quasi-biennial oscillation (QBO), the 11-year solar cycle (SC), and the anthropogenic cooling trend (CT) in the lower stratosphere, influence tropospheric variations in the tropics by modulating moist convection and its large-scale organization into meso-to-planetary-scale systems. Such multi-scale interactions cover a wide range of space- and time-scales, including phenomena ranging from moist convection, its diurnal variations, cloud clusters, tropical cyclones, the Madden-Julian Oscillation (MJO), monsoon circulations, interannual variations like El Nino Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD), to the global warming trend. Some global general circulation models and regional cloud-resolving models show similar features as these observations, but such modeling studies are in a rather preliminary state. For more details, please visit https://www.sparc-climate.org/activities/satio-tcs/.

    This is a workshop on the stratosphere-troposphere dynamical coupling in the tropics, and also teleconnections to the extratropics, jointly organized with the following collaborative research activities:

    Two-day core sessions are planned for the latest results of observations and data analyses, numerical experiments, and theoretical studies on the stratosphere-troposphere dynamical coupling in the tropics, whereas a couple of sessions are also planned for some specific subjects related to the influences of solar activity variations on weather and climate, and the implications for extreme weather and climate in the Maritime Continent under the scope of stratosphere-troposphere dynamical coupling. Participation of early career scientists and PhD students is encouraged, and limited amount of grants will be available to support the participation from Asian countries.

Schematic overview of stratospheric influence on the tropical troposphere
(SPARC newsletter No.50 - February 2018)