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  Reply to the Comment on "On the relationship between AMOC slowdown and global surface warming"

Caesar, L., Rahmstorf, S., Feulner, G. (2021): Reply to the Comment on "On the relationship between AMOC slowdown and global surface warming". - Environmental Research Letters, 16, 3, 038002.
https://doi.org/10.1088/1748-9326/abc776

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 Urheber:
Caesar, Levke1, Autor              
Rahmstorf, Stefan1, Autor              
Feulner, Georg1, Autor              
Affiliations:
1Potsdam Institute for Climate Impact Research, ou_persistent13              

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 Zusammenfassung: In their Comment on our paper (Caesar et al., 2019), Chen and Tung (hereafter C&T) argue that our analysis, showing that over the last decades AMOC strength and global mean surface temperature were positively correlated, is incorrect. Their claim is mainly based on two arguments, neither of which is justified: First, C&T claim that our analysis is based on "established evidence" that was only true for preindustrial conditions – this is not the case. Using data from the modern period (1947-2012), we show that the established understanding (i.e. deep-water formation in the North Atlantic cools the deep ocean and warms the surface) is correct, but our analysis is not based on this fact. Secondly, C&T claim that our results are based on a statistical analysis of only one cycle of data which was furthermore incorrectly detrended. This, too, is not true. Our conclusion that a weaker AMOC delays the current surface warming rather than enhances it, is based on several independent lines of evidence. The data we show to support this covers more than one cycle and the detrending (which was performed to avoid spurious correlations due to a common trend) does not affect our conclusion: the correlation between AMOC strength and global mean surface temperature is positive. We do not claim that this is strong evidence that the two time series are in phase, but rather that this means that the two time series are not anti-correlated.

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Sprache(n): eng - Englisch
 Datum: 2020-11-042020-11-042021-02-26
 Publikationsstatus: Final veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1088/1748-9326/abc776
MDB-ID: yes - 3191
PIKDOMAIN: RD1 - Earth System Analysis
Organisational keyword: RD1 - Earth System Analysis
Research topic keyword: Oceans
Research topic keyword: Attribution
Regional keyword: Global
OATYPE: Gold Open Access
 Art des Abschluß: -

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Titel: Environmental Research Letters
Genre der Quelle: Zeitschrift, SCI, Scopus, p3, oa
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 16 (3) Artikelnummer: 038002 Start- / Endseite: - Identifikator: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/150326
Publisher: IOP Publishing