The linkage between Arctic sea ice changes and mid-latitude atmospheric circulation in reanalysis data and model simulations— The role of barotropic-baroclinic interactions


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Doerthe.Handorf [ at ] awi.de

Abstract

bserved global warming trends have their maximum in Arctic regions, a phenomenon referred to as Arctic Amplification. Consequently, Arctic sea ice shows a strong decreasing trend. These changes imprint modifications on atmospheric flow patterns not only in Arctic regions themselves. Changes of teleconnections and planetary scale motions like Rossby wave trains affect mid-latitude climate as well. In extension to the studies by Jaiser et al. (abstract submitted) here we study the impact of sea-ice changes on changes in atmospheric synoptic and planetary waves. Therefore, we analyse the atmospheric kinetic energy spectra for ERA-Interim reanalysis and the properly designed Atmospheric General Circulation Model (AGCM) experiments with prescribed sea-ice changes (cf. abstract by Jaiser et al.). Special emphasis has been put on the the role of barotropic-baroclinic interactions and corresponding changes in the tropospheric planetary wave trains by examining the nonlinear kinetic energy and enstrophy interaction and subsequent redistribution of kinetic energy and enstrophy.



Item Type
Conference (Poster)
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Primary Division
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Not peer-reviewed
Publication Status
Published
Event Details
US CLIVAR Workshop: Arctic Change and Its Influence on Mid-Latitude Climate and Weather, 01 Feb 2017 - 03 Feb 2017, Washington, DC.
Eprint ID
43971
Cite as
Handorf, D. , Jaiser, R. , Crasemann, B. , Dethloff, K. , Nakamura, T. , Ukita, J. and Yamazaki, K. (2017): The linkage between Arctic sea ice changes and mid-latitude atmospheric circulation in reanalysis data and model simulations— The role of barotropic-baroclinic interactions , US CLIVAR Workshop: Arctic Change and Its Influence on Mid-Latitude Climate and Weather, Washington, DC, 1 February 2017 - 3 February 2017 .


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