Yang, Huang and Waugh, Darryn W. and Orbe, Clara and Patra, Prabir K. and Jöckel, Patrick and Lamarque, Jean-Francois and Tilmes, Simone and Kinnison, Douglas and Elkins, James W. and Dlugokencky, Edward J. (2019) Evaluating Simulations of Interhemispheric Transport: Interhemispheric Exchange Time versus SF6 Age. Geophysical Research Letters, 46 (2), pp. 1113-1120. Wiley. doi: 10.1029/2018GL080960. ISSN 0094-8276.
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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2018GL080960
Abstract
Two recent studies using SF6 observations to evaluate interhemispheric transport in two different ensembles of atmospheric chemistry models reached different conclusions on model performance. We show here that the different conclusions are due to the use of different metrics and not differences in the performance of the models. For both model ensembles, the multi‐model mean interhemispheric exchange time τex agrees well with observations, but in nearly all models the SF6 age in the southern hemisphere is older than observed. This occurs because transport from the northern extratropics into the tropics is too slow in most models, and the SF6 age is more sensitive to this bias than τex. Thus, simulating τex correctly does not necessarily mean that transport from northern midlatitudes into the southern hemisphere is correct. It also suggests that more attention needs to be paid to evaluating transport from northern midlatitudes into the tropics.
Item URL in elib: | https://elib.dlr.de/126249/ | |||||||||||||||||||||||||||||||||
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Document Type: | Article | |||||||||||||||||||||||||||||||||
Title: | Evaluating Simulations of Interhemispheric Transport: Interhemispheric Exchange Time versus SF6 Age | |||||||||||||||||||||||||||||||||
Authors: |
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Date: | 30 January 2019 | |||||||||||||||||||||||||||||||||
Journal or Publication Title: | Geophysical Research Letters | |||||||||||||||||||||||||||||||||
Refereed publication: | Yes | |||||||||||||||||||||||||||||||||
Open Access: | Yes | |||||||||||||||||||||||||||||||||
Gold Open Access: | No | |||||||||||||||||||||||||||||||||
In SCOPUS: | Yes | |||||||||||||||||||||||||||||||||
In ISI Web of Science: | Yes | |||||||||||||||||||||||||||||||||
Volume: | 46 | |||||||||||||||||||||||||||||||||
DOI : | 10.1029/2018GL080960 | |||||||||||||||||||||||||||||||||
Page Range: | pp. 1113-1120 | |||||||||||||||||||||||||||||||||
Publisher: | Wiley | |||||||||||||||||||||||||||||||||
ISSN: | 0094-8276 | |||||||||||||||||||||||||||||||||
Status: | Published | |||||||||||||||||||||||||||||||||
Keywords: | Interhemispheric transport, SF6 metrics, climate models, CCMI, ESCiMo, EMAC, MESSy | |||||||||||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | |||||||||||||||||||||||||||||||||
HGF - Program: | Space | |||||||||||||||||||||||||||||||||
HGF - Program Themes: | Earth Observation | |||||||||||||||||||||||||||||||||
DLR - Research area: | Raumfahrt | |||||||||||||||||||||||||||||||||
DLR - Program: | R EO - Earth Observation | |||||||||||||||||||||||||||||||||
DLR - Research theme (Project): | R - Project Climatic relevance of atmospheric tracer gases, aerosols and clouds, R - Atmospheric and climate research | |||||||||||||||||||||||||||||||||
Location: | Oberpfaffenhofen | |||||||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Atmospheric Physics > Earth System Modelling | |||||||||||||||||||||||||||||||||
Deposited By: | Jöckel, Dr. Patrick | |||||||||||||||||||||||||||||||||
Deposited On: | 11 Feb 2019 10:50 | |||||||||||||||||||||||||||||||||
Last Modified: | 27 May 2020 15:25 |
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