Journal article
Large-scale transport into the Arctic: The roles of the midlatitude jet and the Hadley Cell
H Yang, DW Waugh, C Orbe, G Zeng, O Morgenstern, DE Kinnison, JF Lamarque, S Tilmes, DA Plummer, P Jöckel, SE Strahan, KA Stone, R Schofield
Atmospheric Chemistry and Physics | COPERNICUS GESELLSCHAFT MBH | Published : 2019
Abstract
Transport from the Northern Hemisphere (NH) midlatitudes to the Arctic plays a crucial role in determining the abundance of trace gases and aerosols that are important to Arctic climate via impacts on radiation and chemistry. Here we examine this transport using an idealized tracer with a fixed lifetime and predominantly midlatitude land-based sources in models participating in the Chemistry Climate Model Initiative (CCMI).We show that there is a 25 %-45% difference in the Arctic concentrations of this tracer among the models. This spread is correlated with the spread in the location of the Pacific jet, as well as the spread in the location of the Hadley Cell (HC) edge, which varies consiste..
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Awarded by National Aeronautics and Space Administration
Funding Acknowledgements
We thank the Centre for Environmental Data Analysis (CEDA) for hosting the CCMI data archive. We acknowledge the modeling groups for making their simulations available for this analysis and the joint WCRP SPARC/IGAC Chemistry-Climate Model Initiative (CCMI) for organizing and coordinating this model data analysis activity. In addition, Clara Orbe would like to acknowledge the high-performance computing resources provided by the NASA Center for Climate Simulation (NCCS) and support from the NASA Modeling, Analysis and Prediction (MAP) program. Olaf Morgenstern and Guang Zeng acknowledge the UK Met Office for use of the MetUM. Their research was supported by the New Zealand government's Strategic Science Investment Fund (SSIF) through the NIWA program CACV. Olaf Morgenstern acknowledges funding by the New Zealand Royal Society Marsden Fund (grant 12-NIW-006) and by the Deep South National Science Challenge (http://www.deepsouthchallenge.co.nz, last access: 13 April 2019). Olaf Morgenstern and Guang Zeng also wish to acknowledge the contribution of the NeSI high-performance computing facilities to the results of this research. New Zealand's national facilities are provided by the New Zealand eScience Infrastructure (NeSI) and funded jointly by NeS's collaborator institutions and through the Ministry of Business, Innovation and Employment's Research Infrastructure program (https://www.nesi.org.nz, last access: 13 April 2019). Huang Yang and Darryn W. Waugh acknowledge support from NSF grant AGS-1403676. Darryn W. Waugh acknowledges NASA grant NNX14AP58G. Huang Yang thanks discussions with Luke D. Oman and the co-editor Peter Hess. The EMAC model simulations have been performed at the German Climate Computing Centre (DKRZ) through support from the Bundesministerium fur Bildung und Forschung (BMBF). DKRZ and its scientific steering committee are gratefully acknowledged for providing the HPC and data archiving resources for the consortial project ESCiMo (Earth System Chemistry integrated Modeling). Robyn Schofield and Kane A. Stone acknowledge support from the Australian Research Council's Centre of Excellence for Climate System Science (CE110001028), the Australian government's National Computational Merit Allocation Scheme (q90), and the Australian Antarctic science grant program (FoRCES 4012).