Journal cover Journal topic
Earth System Dynamics An interactive open-access journal of the European Geosciences Union

Journal metrics

  • IF value: 4.589 IF 4.589
  • IF 5-year<br/> value: 3.696 IF 5-year
    3.696
  • CiteScore<br/> value: 3.94 CiteScore
    3.94
  • SNIP value: 0.995 SNIP 0.995
  • SJR value: 2.742 SJR 2.742
  • IPP value: 3.679 IPP 3.679
  • h5-index value: 21 h5-index 21
doi:10.5194/esd-2016-12
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
19 Apr 2016
Review status
This discussion paper has been under review for the journal Earth System Dynamics (ESD). The manuscript was not accepted for further review after discussion.
Identifying global patterns of stochasticity and nonlinearity in the Earth System
Fernando Arizmendi1, Marcelo Barreiro1, and Cristina Masoller2 1Instituto de Física, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo, Uruguay
2Departament de Física, Universitat Politecnica de Catalunya, 08222 Terrassa, Barcelona, Spain
Abstract. By comparing time-series of surface air temperature (SAT, monthly reanalysis data from NCEP CDAS1 and ERA Interim) with respect to the top-of-atmosphere incoming solar radiation (the insolation), we perform a detailed analysis of the SAT response to solar forcing. By computing the entropy of SAT time-series, we also quantify the degree of stochasticity. We find spatial coherent structures which are characterized by high stochasticity and nearly linear response to solar forcing (the shape of SAT time-series closely follows that of the isolation), or vice versa. The entropy analysis also allows to identify geographical regions in which there are significant differences between the NCEP CDAS1 and ERA Interim datasets, which are due to the presence of extreme values in one dataset but not in the other. Therefore, entropy maps are a valuable tool for anomaly detection and model inter-comparisons.

Citation: Arizmendi, F., Barreiro, M., and Masoller, C.: Identifying global patterns of stochasticity and nonlinearity in the Earth System, Earth Syst. Dynam. Discuss., doi:10.5194/esd-2016-12, 2016.
Fernando Arizmendi et al.
Fernando Arizmendi et al.

Viewed

Total article views: 434 (including HTML, PDF, and XML)

HTML PDF XML Total Supplement BibTeX EndNote
347 61 26 434 20 7 24

Views and downloads (calculated since 19 Apr 2016)

Cumulative views and downloads (calculated since 19 Apr 2016)

Saved

Discussed

Latest update: 28 May 2017
Publications Copernicus
Download
Short summary
Understanding how surface air temperature (SAT) is controlled by the incoming solar radiation is a fundamental and challenging problem in climate dynamics. Here we analyze the response of monthly-averaged SAT to solar forcing, and we also quantify the level of randomness of SAT variability. We find coherent spatial patterns which can be interpreted in terms of known climate phenomena.
Understanding how surface air temperature (SAT) is controlled by the incoming solar radiation is...
Share