Fluctuations in Arctic sea-ice extent: comparing observations and climate models
Open Access
- 20 August 2018
- journal article
- research article
- Published by The Royal Society in Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
- Vol. 376 (2129), 20170332
- https://doi.org/10.1098/rsta.2017.0332
Abstract
The fluctuation statistics of the observed sea-ice extent during the satellite era are compared with model output from CMIP5 models using a multifractal time series method. The two robust features of the observations are that on annual to biannual time scales the ice extent exhibits white noise structure, and there is a decadal scale trend associated with the decay of the ice cover. It is shown that (i) there is a large inter-model variability in the time scales extracted from the models, (ii) none of the models exhibits the decadal time scales found in the satellite observations, (iii) five of the 21 models examined exhibit the observed white noise structure, and (iv) the multi-model ensemble mean exhibits neither the observed white noise structure nor the observed decadal trend. It is proposed that the observed fluctuation statistics produced by this method serve as an appropriate test bed for modelling studies. This article is part of the theme issue ‘Modelling of sea-ice phenomena’.Funding Information
- NASA (NNH13ZDA001N-CRYO)
- Swedish Research Council (638-2013-9243)
This publication has 31 references indexed in Scilit:
- Constraining projections of summer Arctic sea iceThe Cryosphere, 2012
- Trends in Arctic sea ice extent from CMIP5, CMIP3 and observationsGeophysical Research Letters, 2012
- Controls on Arctic Sea Ice from First-Year and Multiyear Ice SurvivabilityJournal of Climate, 2011
- Persistence and Inherent Predictability of Arctic Sea Ice in a GCM Ensemble and ObservationsJournal of Climate, 2011
- Geographic muting of changes in the Arctic sea ice coverGeophysical Research Letters, 2010
- Multifractal temporally weighted detrended fluctuation analysis and its application in the analysis of scaling behavior in temperature seriesJournal of Statistical Mechanics: Theory and Experiment, 2010
- Elevation of High-Mobility Group Protein Box-1 in Serum Correlates with Severity of Acute Intracerebral HemorrhageMediators of Inflammation, 2010
- Modeling Global Sea Ice with a Thickness and Enthalpy Distribution Model in Generalized Curvilinear CoordinatesMonthly Weather Review, 2003
- Multifractal detrended fluctuation analysis of nonstationary time seriesPhysica A: Statistical Mechanics and its Applications, 2002
- Integrated approach to the assessment of long range correlation in time series dataPhysical Review E, 2000