System identification techniques for detection of teleconnections within climate models
- 1Marine, Earth, and Atmospheric Sciences Department, North Carolina State University, Raleigh, NC, USA
- 2Department of Earth and Atmospheric Sciences, Indiana University, Bloomington, IN, USA
- 3Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, USA
- 1Marine, Earth, and Atmospheric Sciences Department, North Carolina State University, Raleigh, NC, USA
- 2Department of Earth and Atmospheric Sciences, Indiana University, Bloomington, IN, USA
- 3Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, USA
Abstract. Quantifying teleconnections and discovering new ones is a complex, difficult process. Using transfer functions, we introduce a new method of identifying teleconnections in climate models on arbitrary timescales. We validate this method by perturbing temperature in the Nino3.4 region in a climate model. Temperature and precipitation responses in the model match known El Nino-Southern Oscillation (ENSO)-like teleconnection features, consistent with modes of tropical variability. Perturbing the Nino3.4 region results in temperature responses consistent with the Pacific Meridional Mode, the Pacific Decadal Oscillation, and the Indian Ocean Dipole, all of which have strong ties to ENSO. Some precipitation features are also consistent with these modes of variability, although because precipitation is noisier than temperature, obtaining robust responses is more difficult. While much work remains to develop this method further, transfer functions show promise in quantifying teleconnections or, perhaps, identifying new ones.
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Preprint
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Bethany Sutherland et al.
Interactive discussion


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SC1: 'Transfer function approach', Paul Pukite, 08 Aug 2020
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SC2: 'executive editor comment on gmd-2020-228', Astrid Kerkweg, 12 Aug 2020
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RC1: 'Review', Anonymous Referee #1, 12 Oct 2020
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RC2: 'Review of gmd-2020-228', Anonymous Referee #2, 16 Oct 2020
Interactive discussion


-
SC1: 'Transfer function approach', Paul Pukite, 08 Aug 2020
-
SC2: 'executive editor comment on gmd-2020-228', Astrid Kerkweg, 12 Aug 2020
-
RC1: 'Review', Anonymous Referee #1, 12 Oct 2020
-
RC2: 'Review of gmd-2020-228', Anonymous Referee #2, 16 Oct 2020
Bethany Sutherland et al.
Bethany Sutherland et al.
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