A042
Cirrus, Chemistry and Dynamics of the Upper Troposphere and Lower Stratosphere

Session ID#: 83328

Session Description:
Cirrus clouds in the uppermost troposphere and the chemical composition of the upper troposphere/lower stratosphere (UTLS) play an important role in Earth’s radiative balance. Changes in cirrus properties and coverage and climate feedbacks associated with stratospheric composition represent significant uncertainty in projections of global warming. However, the UTLS is one of the least understood regions of Earth's atmosphere, controlled by a complex interplay of processes from global-scale circulations to mesoscale deep convection to local cloud radiative effects. This session focuses on the formation, distribution, and lifecycle of cirrus; convective influence; the interaction between the dynamics and chemistry of the UTLS; and the impact of the Asian and North American monsoons. We welcome papers that make use of new in-situ measurements and satellite observations, as well as simulations of processes impacting the UTLS at present and under future climate scenarios, at scales from cloud-resolving to global models.
Index Terms:

0320 Cloud physics and chemistry [ATMOSPHERIC COMPOSITION AND STRUCTURE]
0340 Middle atmosphere: composition and chemistry [ATMOSPHERIC COMPOSITION AND STRUCTURE]
0341 Middle atmosphere: constituent transport and chemistry [ATMOSPHERIC COMPOSITION AND STRUCTURE]
3362 Stratosphere/troposphere interactions [ATMOSPHERIC PROCESSES]

Primary Convener:  Jessica B Smith, Harvard Univ/Anderson Group, Cambridge, MA, United States
Conveners:  Elisabeth J Moyer, University of Chicago, Geophysical Sciences, Chicago, IL, United States, Troy D Thornberry, NOAA Earth System Research Laboratory, Chemical Sciences Division, Boulder, CO, United States and Thomas P Ackerman, Univ of WA--JISAO, Seattle, WA, United States
Primary Liaison:  Jessica B Smith, Harvard Univ/Anderson Group, Cambridge, MA, United States
 
Amplified Temperature Variability in the Tropical Tropopause Layer Driven by Dynamically Induced Ozone Variation in CESM-WACCM (496246)
Simchan Yook1, David W J Thompson1 and Susan Solomon2, (1)Colorado State University, Atmospheric Science, Fort Collins, CO, United States, (2)MIT/EAPS, Cambridge, MA, United States
 
Climatology and detection of overshooting convection from 4-years of GPM precipitation radar and passive microwave observations (498883)
Nana Liu, Texas A&M University Corpus Christi, Corpus Christi, TX, United States and Chuntao Liu, Texas A&M Univ Corpus Christi, corpus christi, TX, United States
 
Influence of convection on stratospheric water vapor in the North American monsoon (500167)
Wandi Yu, Texas A&M University College Station, College Station, TX, United States, Andrew E Dessler, Texas A&M Univ, College Station, TX, United States, Mijeong Park, National Center for Atmospheric Research, Atmospheric Chemistry Observations & Modeling Laboratory, Boulder, CO, United States and Eric J Jensen, National Center for Atmospheric Research, Atmospheric Chemistry Observations and Modeling Laboratory, Boulder, CO, United States
 
Transport into the upper troposphere-lower stratosphere over North America during northern summer (503294)
Xinyue Wang, Purdue University, EAPS, West Lafayette, IN, United States, William John Randel, National Center for Atmospheric Research, Boulder, CO, United States, Yutian Wu, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States and Clara Orbe, NASA Goddard Institute for Space Studies, New York, NY, United States
 
Recent Variability in Stratospheric Water Vapor observed by the SAGE III/ISS (506494)
Mijeong Park1, Sean M Davis2, William John Randel1, Karen Hepler Rosenlof3, Robert P Damadeo4, David E Flittner4, Dale F Hurst5, Holger Voemel6 and Henry B Selkirk7, (1)National Center for Atmospheric Research, Boulder, CO, United States, (2)Chemical Sciences Division, NOAA Earth System Research Laboratory; Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States, (3)NOAA Earth System Research Laboratory, Chemical Sciences Division, Boulder, CO, United States, (4)NASA Langley Research Center, Hampton, VA, United States, (5)NOAA Earth System Research Laboratory, Global Monitoring Division, Boulder, CO, United States, (6)DWD, Tauche, Germany, (7)GESTAR, Universities Space Research Association, Columbia, MD, United States
 
Upper Tropospheric Water vapor and Cirrus Cloud Fraction Anomalies and the Annual Cycle (507131)
Mark R Schoeberl, Science and Technology Corporation, Boulder, CO, United States, Rei Ueyama, NASA Ames Research Center, Moffett Field, CA, United States, Eric Jensen, Self, Boulder, CO, United States, Melody A Avery, NASA Langley Research Ctr, Hampton, VA, United States, Andrew E Dessler, Texas A&M Univ, College Station, TX, United States and Wandi Yu, Texas A&M University College Station, Atmospheric Science, College Station, United States
 
Observed Influences of the Rising Tropopause on Tropospheric Column Ozone in the Past Four Decades from Global Ozonesonde Data (509022)
Lingyun Meng, School of Atmospheric Sciences, Nanjing University, Nanjing, China and Jane Liu, Department of Geography and Planning, University of Toronto, Toronto, ON, Canada
 
Why Are There NH3 (g) in the Upper Troposphere? (510716)
Cui Ge, University of Iowa, Iowa City, IA, United States and Jun Wang, University of Iowa, Chemical and Biochemical Engineering, Iowa City, IA, United States
 
Influence of Deep Convection on Cirrus and Water Vapor Concentration in the Upper Troposphere and Lower Stratosphere (Invited) (523967)
Rei Ueyama, NASA Ames Research Center, Moffett Field, CA, United States and Eric Jensen, Self, Boulder, CO, United States
 
The Water Budget of the Tropical Tropopause Layer (Invited) (529600)
Stephan Fueglistaler, Princeton University, Department of Geosciences, Princeton, NJ, United States
 
Using In Situ Measurements to Evaluate the Lagrangian Dry Point (LDP) Approach for Calculatingthe Stratospheric-entry Water Vapor Concentration (538330)
Eric J Jensen, National Center for Atmospheric Research, Atmospheric Chemistry Observations and Modeling Laboratory, Boulder, CO, United States and Rei Ueyama, NASA Ames Research Center, Moffett Field, CA, United States
 
Using Airborne VOC Measurements to Derive a Transit Time Spectrum: Variabilities and Uncertainties (542152)
Sofia Chelpon1, Laura Pan2, Zhengzhao Johnny Luo3, Elliot L Atlas4, Shawn Bryan Honomichl5, Rebecca S Hornbrook5, Eric C Apel5 and Samuel R Hall6, (1)CUNY City College of New York, New York, NY, United States, (2)NCAR / ACD, Boulder, CO, United States, (3)City College of New York, CUNY, NYC, NY, United States, (4)University of Miami, Miami, FL, United States, (5)National Center for Atmospheric Research, Boulder, CO, United States, (6)NCAR, Denver, CO, United States
 
Convective Influence on United States Upper Troposphere Lower Stratosphere Composition (560135)
Emily Tinney and Cameron R Homeyer, University of Oklahoma, School of Meteorology, Norman, OK, United States
 
High latitude vertical profiles of 14CO2 across the tropopause from the Atmospheric Tomography (ATom) Mission (566329)
Kristie A Boering1, Julia Carlstad2, Lauren Garofalo3, Isabel Bogacz2, Donald Ray Blake4 and Thomas P Guilderson5, (1)University of California Berkeley, Chemistry and Earth & Planetary Science, Berkeley, CA, United States, (2)University of California Berkeley, Chemistry, Berkeley, CA, United States, (3)Department of Chemistry, Colorado State University, Fort Collins, United States, (4)University of California Irvine, Irvine, CA, United States, (5)LLNL, Livermore, CA, United States
 
Cirrus and Ozone Variabilities in the UTLS over the maritime continent during YMC-Sumatra 2017 Field Campaign (572790)
Junko Suzuki1, Shin-Ya Ogino2, Ryuichi Shirooka1, Takenari Kinoshita3, Shuichi Mori4, Suginori Iwasaki5, Urip Haryoko6 and Kunio Yoneyama7, (1)JAMSTEC, Kanagawa, Japan, (2)Japan Agency for Marine-Earth, Yokosuka, Japan, (3)Communications Research Lab, Tokyo, Japan, (4)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (5)National Defense Academy, Kanagawa, Japan, (6)BMKG, Jakarta, Indonesia, (7)Japan Ag for Mar Ear Sci & Tec, Yokosuka, Japan
 
Cloud Chamber Experiments Assessing the Principle of Arctic Cirrus Cloud Thinning (579968)
Tobias Schorr1, Isabelle Steinke2 and Thomas Leisner1, (1)Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research - Atmospheric Aerosol Research, Karlsruhe, Germany, (2)Pacific Northwest National Laboratory, Richland, United States
 
Heterogeneous Chlorine Activation in the Tropical UTLS via the Matsuno-Gill Heating Response (580715)
Catherine Wilka, Massachusetts Institute of Technology, Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, Susan Solomon, MIT/EAPS, Cambridge, MA, United States and Timothy Cronin, MIT, Cambridge, MA, United States
 
The Buffer Zone of the Quasi-Biennial Oscillation: Formation and Variability (594999)
Aaron Match, Princeton University, Princeton, NJ, United States and Stephan Fueglistaler, Princeton University, Department of Geosciences, Princeton, NJ, United States
 
The Effect of the North American Monsoon Anticyclone on Cross-tropopause Convective Outflow (602838)
Corey Clapp, Harvard University, Chemistry and Chemical Biology, Cambridge, MA, United States, Jessica B Smith, Harvard Univ/Anderson Group, Cambridge, MA, United States, Kristopher M Bedka, NASA Langley Research Center, Climate Science Branch, Hampton, VA, United States and James G Anderson, Harvard University, Cambridge, MA, United States
 
Sensitivity of organic-containing lower stratospheric aerosol radiative forcing to complex refractive index (605177)
John A Dykema, Harvard University, Cambridge, MA, United States and Frank N Keutsch, UW Madison, Madison, WI, United States
 
Size-dependent aerosol chemistry in the lower stratosphere (605214)
Daniel M Murphy1, Karl D Froyd2, Gregory P Schill2, Charles A Brock3, Agnieszka Kupc4 and Christina Williamson5, (1)NOAA Boulder, Boulder, CO, United States, (2)NOAA/CIRES, Boulder, CO, United States, (3)NOAA, Boulder, United States, (4)University of Vienna, Faculty of Physics, Vienna, Austria, (5)NOAA/CIRES, Boulder, United States
 
Hydraulic jump dynamics in the Above-Anvil Cirrus Plume in a high resolution supercell simulation (610088)
Morgan E O'Neill, Stanford University, Stanford, CA, United States and Leigh Orf, Cooperative Institute for Meteorological Satellite Studies, Madison, WI, United States
 
Relationships Between Extratropical Precipitation Systems and Upper Tropospheric and Lower Stratospheric Temperatures and Tropopause Height Observed from GPM and GPS Radio Occultation (610454)
Benjamin Ryan Johnston, Texas A&M University Corpus Christi, Corpus Christi, TX, United States, Feiqin Xie, Texas A&M University-Corpus Christi, Corpus Christi, TX, United States and Chuntao Liu, Texas A&M Univ Corpus Christi, corpus christi, TX, United States
 
Improved ice cloud representation in the CAM/CARMA cirrus model using interactive sulfate aerosol and heterogeneous nucleation. (617334)
Christopher Maloney, University of Colorado at Boulder, Boulder, CO, United States, Charles Bardeen, National Center for Atmospheric Research, Boulder, CO, United States, Brian Toon, University of Colorado at Boulder, ATOC/LASP, Boulder, CO, United States and Karl D Froyd, NOAA/CIRES, Boulder, CO, United States
 
Gravitational fractionation of Ar/N2 and age of air in the lowermost stratosphere (620104)
Benjamin Birner1, Martyn Chipperfield2, Eric James Morgan1, Britton B Stephens3, Marianna Linz4, Wuhu Feng2, Chris J Wilson5, Jonathan D Bent6, Eric J Hintsa7, Jeffrey P Severinghaus1 and Ralph F Keeling8, (1)Scripps Institution of Oceanography, La Jolla, CA, United States, (2)University of Leeds, School of Earth and Environment, Leeds, United Kingdom, (3)National Center for Atmospheric Research, Earth Observing Laboratory, Boulder, CO, United States, (4)University of California, Los Angeles, Los Angeles, CA, United States, (5)University of Leeds, Leeds, LS2, United Kingdom, (6)Scripps Inst of Oceanography, La Jolla, CA, United States, (7)Cooperative Institute for Research in Environmental Sciences, NOAA/ESRL Global Monitoring Division, Boulder, CO, United States, (8)Univ California San Diego, La Jolla, CA, United States
 
Disentangling the Drivers of Interannual Variability in Trace Gases in the Upper Troposphere / Lower Stratosphere Using the Community Earth System Model and Measurements from the Aura Microwave Limb Sounder (624843)
Jessica L. Neu, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, Michelle L Santee, JPL, Pasadena, CA, United States and Douglas Edward Kinnison, NCAR, Boulder, CO, United States
 
Tropopause-Overshooting Convection – 21 Years of Ground-Based Radar Evaluation over the United States (631319)
Cameron R Homeyer, University of Oklahoma Norman Campus, Norman, OK, United States and Tao Xian, University of Oklahoma, School of Meteorology, Norman, OK, United States
 
In-situ UT/LS cirrus observations over the Asian Summer Monsoon (632297)
Elisabeth J Moyer1, Benjamin Clouser1, Sergey M. Khaykin2, Martina Kraemer3, Clare E Singer4, Eric Jensen5, Alexey Lykov6, Silvia Bucci7, Bernard Legras8, Stephan Borrmann9, Francesco Cairo10, Velentin Mitev11, Renaud Matthey12, Christian Rolf13, Silvia Viciani14, C Michael Volk15, Fabrizio Ravegnani10, Francesco D’Amato14, Vladimir A Yushkov16, Alexey Ulanovsky16 and Fred Stroh17, (1)University of Chicago, Geophysical Sciences, Chicago, IL, United States, (2)LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales, LATMOS, Paris Cedex 05, France, (3)Forschungszentrum Juelich, Juelich, Germany, (4)University of Chicago, Physics, Chicago, IL, United States, (5)NASA, Boulder, CO, United States, (6)Central Aerological Observatory of RosHydroMet, Dolgoprudny, Russia, (7)National Research Council (CNR), Institute of Atmospheric Sciences and Climate (ISAC), Rome, Italy, (8)Laboratoire de Météorologie Dynamique ENS, Paris, France, (9)Johannes Gutenberg University, Max Planck Institute for Chemistry, Particle Chemistry, Mainz, Germany, (10)Institute of Atmospheric Science and Climate, ISAC-CNR, Rome, Italy, (11)Centre Suisse d’Electronique et de Microtechnique Neuchatel, Neuchatel, Switzerland, (12)LTF-University of Neuchatel, Neuchatel, Switzerland, (13)Forschungszentrum Juelich, IEK-7, Juelich, Germany, (14)CNR-INO National Institute of Optics, Florence, Italy, (15)Bergische Univ. Wuppertal, Wuppertal, Germany, (16)Central Aerological Observatory of RosHydroMet, Moscow, Russia, (17)Forschungszentrum Juelich, Jülich, Germany
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