A41B:
Extratropical Large-Scale Atmospheric Circulation Variability II Posters

Submit an Abstract to this Session



Session ID#: 23647

Session Description:
The extratropical atmospheric circulation is characterized by large-scale variability patterns such as blocking events, large-amplitude/quasi-stationary planetary waves, and annular modes. The midlatitude variability is important to the extratropical weather (and weather extremes), as well as the interaction of the extratropical troposphere with the tropics, stratosphere, ocean, and cryosphere. While widely studied, many questions remain unanswered about the dynamics, predictability, and climate projections of the extratropical atmospheric variability, and current weather/climate models have difficulties faithfully reproducing some of the observed behavior.

The goal of this session is to synthesize observational, hierarchical modeling, and theoretical studies of various aspects of this variability such as the associated dynamics, sources of predictability, responses to climate change, and connections with weather extremes. A deeper understanding will improve weather predictions on sub-seasonal and longer timescales, and help with interpreting regional responses to climate change. These are active areas of research with significant scientific and socio-economic impacts.

Primary Convener:  Ding Ma, Columbia University of New York, Earth Institute, Palisades, NY, United States
Conveners:  Elizabeth A Barnes, Colorado State University, Department of Atmospheric Science, Fort Collins, United States, Pedram Hassanzadeh, Rice University, Houston, TX, United States and Ji Nie, Columbia University of New York, Lamont Doherty Earth Observatory, Palisades, United States
Chairs:  Ding Ma, Columbia University of New York, Earth Institute, Palisades, NY, United States and Pedram Hassanzadeh, Rice University, Houston, TX, United States
OSPA Liaison:  Ding Ma, Columbia University of New York, Earth Institute, Palisades, NY, United States

Cross-Listed:
  • C - Cryosphere
  • H - Hydrology
  • OS - Ocean Sciences
Index Terms:

1616 Climate variability [GLOBAL CHANGE]
1620 Climate dynamics [GLOBAL CHANGE]
3305 Climate change and variability [ATMOSPHERIC PROCESSES]
3319 General circulation [ATMOSPHERIC PROCESSES]

Abstracts Submitted to this Session:

Can ENSO-like convection force an ENSO-like extratropical response on subseasonal timescales? (259706)
Michael Goss, Stanford University, Stanford, CA, United States; The Pennsylvania State University, University Park, PA, United States, Sukyoung Lee, Penn State University, University Park, PA, United States, Steven B Feldstein, Penn St Univ, University Park, PA, United States and Noah S Diffenbaugh, Stanford University, Earth System Science, Stanford, United States
Characteristics of unstable midlatitude ocean-atmosphere interaction with atmospheric transient eddy vorticity feedback (268384)
Lilan Chen1, Xiu-Qun Yang2 and Jiabei Fang2, (1)Nanjing University, Nanjing, China, (2)Nanjing University, School of Atmospheric Sciences, Nanjing, China
Medium-range Performance of the Global NWP Model (269465)
Junsu Kim1, Taekyu Jang2, Jincheol Kim2 and Yoonjae Kim2, (1)Korea Meteorological Administration (KMA), Daejeon, South Korea, (2)KMA Korea Meteorological Administration, Seoul, South Korea
Role of the sea surface temperature in the midlatitude atmospheric circulation anomalies associated with PDO (272079)
Tao Lingfeng1, Xiu-Qun Yang2 and Xuguang Sun1, (1)Nanjing University, Nanjing, China, (2)Nanjing University, School of Atmospheric Sciences, Nanjing, China
Two typical modes in the variabilities of wintertime North Pacific basin-scale oceanic fronts and associated atmospheric eddy-driven jet (272566)
Xiu-Qun Yang1, Liying Wang2 and Jiabei Fang1, (1)Nanjing University, School of Atmospheric Sciences, Nanjing, China, (2)Nanjing University, Nanjing, China
North Atlantic Jet Variability in PMIP3 LGM Simulations (276436)
Paul Hezel, University of Bergen, Bergen, Norway and Camille Li, Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway
Northern Hemisphere Autumn and Winter Climate Responses to Realistic Tibetan Plateau and Mongolia Snow Anomalies (280610)
Qigang Wu, Fudan University, Department of Atmospheric and Oceanic Sciences, Institute of Atmospheric Sciences, Shanghai, China, Yonghong Yao, Nanjing University, School of Atmospheric Sciences, Nanjing, China and Shizuo Liu, Nanjing University, Nanjing, China
Intraseasonal variability of upper-ocean currents and photosynthetic primary production along the U.S. west coast associated with the Madden-Julian Oscillation (212954)
Bradford Barrett1, Alexander R Davies2, Cecily N Steppe3 and Colin Hackbarth1, (1)US Naval Academy, Oceanography, Annapolis, MD, United States, (2)US Naval Academy, Oceanography Department, Annapolis, MD, United States, (3)US Naval Academy, Annapolis, MD, United States
Diagnosing the role of dynamic tropopause wave breaking for synoptic-scale buildups in Northern Hemisphere zonal available potential energy (225245)
Kevin Bowley1, John R Gyakum2 and Eyad Atallah1, (1)McGill University, Montreal, QC, Canada, (2)McGill University, Atmospheric and Oceanic Sciences, Montreal, QC, Canada
Countervailing patterns in CESM-simulated regional Antarctic snowfall variability: spatial distribution and associated atmospheric circulation modes (235500)
Jeremy Garmeson Fyke, Los Alamos National Laboratory, Los Alamos, NM, United States, Jan Lenaerts, University of Colorado Boulder, Department of Atmospheric and Oceanic Sciences, Boulder, CO, United States and Hailong Wang, Pacific Northwest National Laboratory, Richland, United States
Annular Mode Dynamics: Eddy Feedbacks and the Underlying Mechanisms (236303)
Pedram Hassanzadeh, Rice University, Houston, TX, United States, Ding Ma, Columbia University of New York, Earth Institute, Palisades, NY, United States and Zhiming Kuang, Harvard Univ, Cambridge, United States
Dependence of present and future European heat waves and cold spells on the location of atmospheric blocking (249043)
Lukas Brunner, University of Graz, Wegener Center, Graz, Austria, Nathalie Schaller, Center for International Climate and Environmental Research Oslo, Oslo, Norway, Jana Sillmann, Universtiy of Hamburg, Hamburg, Germany and Andrea Karin Steiner, University of Graz, Wegener Center for Climate and Global Change, Graz, Austria
Winter extreme cold days in North China and the Related Large-scale Atmospheric Circulation (250341)
Chaoxia Yuan1, Wenmao Li2 and Zhaoyong Guan1, (1)NUIST Nanjing University of Information Science and Technology, Nanjing, China, (2)Nanjing University of Information Science & Technology, Nanjing, China

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