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Author(s)

Peter Ditlevsen and Susanne Ditlevsen

Title

Warning of a forthcoming collapse of the Atlantic meridional overturning circulation

Description

This is data and code for the paper: "Warning of a forthcoming collapse of the Atlantic meridional overturning circulation" published in Nature Communications, 2023.The following files are included: Supplementary_Information.pdfPdf containing supplementary information for the paper.S1: Maximum likelihood estimation from data following an Ornstein-Uhlenbeck process.S2: Pseudo-likelihood estimation of the tipping time, based on Strang splitting.AMOCestimation.htmlFile containing R code, explanations and figures from the paper.AMOCestimation.RmdR Mark down file that produces the AMOCestimation.html file. The file needs access to the files below.AMOCdata.txt Text file with the AMOC fingerprint. Contains the following variables:"time" : time in years"AMOC0" : sea surface temperature (SST) anamoli, corrected for seasonal variations"AMOC1" : AMOC0 subtracted 1 x global mean"AMOC2" : AMOC0 subtracted 2 x global mean"GM"       : global mean temperature (GM)SimulatedTraces.RdataR archive containing 3 elements:xx.data : R data frame containing 1000 simulated tracesnsim : numerical variable containing number of simulated traces, equals 1000Delta_t : time step in years used in the simulations, equals 1/12EstimMatrix_1000repetitions.xlsxExcel file containing the 1000 estimates from simulated data, used for constructing bootstrap confidence intervals.