Composition and Transport in the Tropical Troposphere and Lower Stratosphere Meeting

Program Agenda

Monday, July 20
Tuesday, July 21
Wednesday, July 22
Thursday, July 23

Time	Title/Abstract	Speaker
830	Welcome/introduction	E. Jensen, N. Harris, T. Thornberry
845	Program manager comments	K. Jucks
900	SPARC perspective	J. Alexander, N. Harris
910	Some reflections on the history of key scientific advances and current challenges in understanding the tropical UTLS	S. Solomon
Upper troposphere/lower stratosphere composition		Chair: N. Livesay
940	Composition and physical properties of the Asian Tropopause Aerosol Layer and the North American Tropospheric Aerosol Layer	P. Yu
1000	Aerosol Composition and Volatility in TTL - In situ Balloon Borne Measurements and sampling over Biak Indonesia	M. Hayashi
1020	Break
1050	Correcting the record of volcanic stratospheric aerosol impact: Nabro and Sarychev Peak	M. Fromm
1110	Composition and sources of aerosol in the upper troposphere/lowermost stratosphere	V. Aquila
1130	Trace gas sources and distributions in the tropical troposphere and TTL	E. Atlas
1150	Science questions and measurement strategies within the European research project StratoClim	M. Rex
1210	Lunch
1330	Strateole 2: A Unique Super Pressure Balloon Campaign For Long Duration, Quasi-Lagrangian, Chemical And Dynamical Measurements In The Tropical Tropopause Layer	L. Kalnajs
1350	Equatorial middle atmospheric chemical composition changes during sudden stratospheric warming events	O. Nath
1410	Ozone in the Tropical Tropopause Layer (TTL) over the Western Pacific	E. Hintsa
Upper troposphere/lower stratosphere dynamics and transport		Chair: L. Pfister
1430	Vertical and quasi-isentropic transport pathways through the Asian monsoon anticyclonic circulation into the lowermost stratosphere	R. Mueller
1450	Trajectory dispersion due to uncertainties in analysis wind fields and the inherent limitations of transport calculations in the upper tropical troposphere	J. Bergman
1510	Break
1540	Transport Rates and Age of Air in the TTL during Boreal Winter	J. Pittman
1600	Evaluating and Diagnosing the Transport of Trace Gases to the Upper Troposphere / Lower Stratosphere in the CAM-Chem Model using Aura Microwave Limb Sounder Measurements	J. Neu
1620	A Modeling Study of STE Near Tropical Cyclones Talas and Ita	M. Hitchman
1640	Vertical and Horizontal Mixing in the Tropical Tropopause Layer	S. Glanville
1700	Research Collaborations on Stratosphere-Troposphere Dynamical Coupling in the Tropics in Association with the Project of Years of the Maritime Continent (YMC) for 2017-2019	S. Yoden
1720	Adjourn

Time	Title/Abstract	Speaker
Upper troposphere/lower stratosphere composition (continued)		Chair: L. Pfister
830	QBO dynamics in a 7-km global climate simulation	L. Holt
850	Characteristics of Waves in the Tropical Tropopause Layer	J.-E. Kim
910	Cirrus and Wave-induced Temperature Anomaly Relationships in ATTREX Measurements	J. Alexander
Impact of deep convection on tropical tropospheric and stratospheric composition		Chair: J. Alexander
930	An upper tropospheric cloud-convection (UTCC) process study	G. Stephens
1000	Tropical tropopause layer variability associated with the Madden-Julian Oscillation during DYNAMO	T. Birner
1020	Break
1050	Transport across the TTL and convective sources	B. Legras
1110	Convective transport of NMHCs and VSLS from the surface to the upper troposphere and lower stratosphere	Q. Liang
1130	Convective impacts on trace gases in the Tropical Tropopause Layer during Boreal Winter as seen during ATTREX	L. Pfister
1150	Efforts Toward Development Of A High Resolution Global Climatology Of Overshooting Cloud Top Detections Using MODIS and Geostationary Satellite Imager Data	K. Bedka
1210	Lunch
1330	Impact of Overshooting Deep Convection on the Stratospheric Water Vapor: an A-Train Satellite View	H. Su
1350	Survey of global distribution of convection overshooting tropopause using first year of GPM observations	C. Liu
Use of ground-based, airborne, and satellite measurements for evaluation of global models		Chair: R. Müller
1410	The OMPS Limb Profiler Stratospheric Aerosol Products and Comparisons to the GEOS-5 Chemistry-Climate Model	P. Colarco
1430	An assessment of upper-troposphere and lower-stratosphere water vapor in GEOS5, MERRA, and ECMWF analysis and reanalyses using Aura MLS observations	J. Jiang
1450	An assessment of the CAM5/CARMA model: TTL cirrus cloud representation through comparisons with ATTREX 3 and CALIPSO observations	C. Maloney
1510	Comparison of WRF simulated mass fluxes with those derived from radar observations for the Tropical Western Pacific	R. Schofield
1530	Break
Halogen budgets/partitioning/sources/transport/etc.		Chair: E. Atlas
1600	Growth in the stratospheric loading of halogenated very short-lived substances and their impact on ozone and climate	M. Chipperfield
1620	Halocarbons in the TTL: the roles of oceanic emissions and atmospheric transport	S. Tegtmeier
1640	Tropical tropospheric bromine and stratospheric injection of Bry from VSL compounds inferred from CONTRAST	R. Salawitch
1700	Measurements of bromine monoxide and iodine monoxide in the lower stratosphere: constraints on total inorganic bromine and iodine	T. Koenig
1720	Measurement and simulation of CH4, O3, NO2, BrO, and major brominated source gases during the NASA-ATTREX Global Hawk deployments in 2013: Implications for the photochemistry and total amount of bromine in the TTL and stratosphere	K. Pfeilsticker
1740	Adjourn

Time	Title/Abstract	Speaker
Halogen budgets/partitioning/sources/transport/etc. (continued)		Chair: E. Atlas
830	NAME modelling activities for ATTREX-CONTRAST VSLS measurements	M. Filus
850	Enhanced ozone loss by active inorganic bromine chemistry in the tropical troposphere	C. Percival
910	Transport of halogenated VSLS from the Indian Ocean to the stratosphere through the Asian monsoon circulation	A. Fiehn
Chemical and dynamical processes controlling ozone concentrations from the surface to the stratosphere		Chair: R. Salawitch
930	Bi-modal Distribution of Tropical Tropospheric Ozone over the Western Pacific from CONTRAST Observations	L. Pan
950	A Tropical Tropospheric Source of High Ozone/Low Water Filaments in the Western Pacific	D. Anderson
1010	Break
1040	Modelling Manus ozone using WRF	R. Newton
1100	Sources of Seasonal Variability in Tropical UT/LS Water Vapor and Ozone: Inferences from the Ticosonde Dataset	H. Selkirk
1120	Near-tropopause Ozone Variability at Tropical and Subtropical Ozonesonde Sites Revealed from Self-Organizing Map Clustering	R. Stauffer
1140	The impact of upper tropospheric and lower stratospheric ozone changes on global warming projections	P. Nowack
1200	Lunch and Poster session
1530	OH in the TWP: An In-Depth Comparison of CONTRAST and CAM-Chem OH Precursors and Implications for the Oxidative Capacity of the Troposphere	J. Nicely
Processes controling UTLS water vapor		Chair: E. Jensen
1550	Understanding the long-term trend in stratospheric water vapor	A. Dessler
1610	A solar signal in lower stratospheric water vapour?	S. Lossow
1630	Revisiting water vapor seasonal cycle observed in tropical lower stratosphere: Role of BDC, convective activity and ozone	S. Jain
1650	Impact of Sudden Stratospheric Warming Event on the TTL and Deep Convective Activity	K. Kodera
1710	Role of saturation in the water vapor diurnal cycle in the South American Tropical Tropopause Layer	F. Carminati
1730	Adjourn

Time	Title/Abstract	Speaker
Processes controling UTLS water vapor (continued)		Chair: E. Jensen
830	The Radiative Effects of Tropical Tropopause Layer Water Vapor and Ozone on Tropical Cyclone Potential Intensity	D. Gilford
850	A Lagrangian Description on the Troposphere - Stratosphere Transport Changes Associated with the Stratospheric Water Drop Around the Year 2000	F. Hasebe
910	TTL cooling and drying during the January 2013 Stratospheric Sudden Warming	S. Evan
930	Dynamical processes and transport influencing the water vapour budget in the upper troposphere / lower stratosphere (UTLS)	M. Riese
950	TTL dehydration efficiency evaluated using in-situ data and back-trajectories	A. Rollins
1010	Break
1040	Gravity Waves Amplify Upper Tropospheric Dehydration by Clouds	M. Schoeberl
1100	Saturation at the tropical tropopause	H. Voemel
1120	Moist phase in the SH extratropical lower stratosphere: a view of transport from the tropics	K. Zhang
1140	A Quick Report on the LAPANCRYO-SOWER 2015 Biak Campaign	Y. Inai
1200	Anomalous dehydration of the TTL during January 2013: evidence from balloon, aircraft and satellite observations	S. Khaykin
1220	Lunch
Cirrus formation, properties, and effects
1330	Microphysical Properties of Tropical Tropopause Layer Cirrus	S. Woods
1350	Comparisons of cirrus cloud properties between polluted and pristine air based on in-situ observations from the NASA ATTREX, NSF HIPPO and EU INCA campaigns	M. Diao
1410	Distribution of Cirrus Cloud Ice in the Tropical Tropopause Layer as Indicator of Regional Cloud Formation Processes and Climate Cycles	M. Avery
1430	Variability of Ice Supersaturation, Nucleation, and Cirrus in TTL Vertical Layers	J. DiGangi
1450	Using ATTREX Data to Improve the Representation of TTL Cirrus in CAM5	C. Bardeen
1510	Break
1540	On the Susceptibility of Cold Tropical Cirrus to Ice Nuclei Abundance	E. Jensen
1600	Microphysical, radiative and dynamical impacts of thin cirrus clouds on humidity in the tropical tropopause layer and lower stratosphere	T. Dinh
1620	A modeling case-study of a tropical tropopause layer cirrus: roles of dynamics and microphysics and cirrus impacts	A. Podglajen
1640	What Controls the Low Ice Number Concentration in the Upper Tropical Troposphere?	C. Zhou
1700	Wrapup

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