Pacific variability under present-day and Middle Miocene boundary conditions

Verfasser / Beitragende:
[Mario Krapp, Johann Jungclaus]
Ort, Verlag, Jahr:
2015
Enthalten in:
Climate Dynamics, 44/9-10(2015-05-01), 2609-2621
Format:
Artikel (online)
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024 7 0 |a 10.1007/s00382-014-2456-2  |2 doi 
035 |a (NATIONALLICENCE)springer-10.1007/s00382-014-2456-2 
245 0 0 |a Pacific variability under present-day and Middle Miocene boundary conditions  |h [Elektronische Daten]  |c [Mario Krapp, Johann Jungclaus] 
520 3 |a We use the coupled climate model MPI-ESM to show that for higher CO2 levels the El Niño-Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO) merge into a single mode of Pacific variability, regardless of present-day or Middle Miocene (~15Ma) topographic boundary conditions. Hence, topographic differences—determining the landscape of past climates—play a smaller role for Pacific variability than previously thought. We attribute the single variability mode to resonance between these two oscillation patterns. In order to estimate the strength of the resonance we compute the spectral power of the ENSO and PDO time series and their coherence. We find that for both Middle Miocene and present-day topographic conditions, higher CO2 forcing leads to stronger resonance between ENSO and PDO. Our results show that (1) stronger CO2 forcing enhances Pacific variability resulting in stronger "atmospheric bridge” and that (2) past climates are likely to exhibit Pacific variability corresponding either to ENSO, PDO, or our proposed single mode. 
540 |a Springer-Verlag Berlin Heidelberg, 2015 
690 7 |a Climate variability  |2 nationallicence 
690 7 |a ENSO  |2 nationallicence 
690 7 |a PDO  |2 nationallicence 
690 7 |a Middle Miocene  |2 nationallicence 
690 7 |a MPI-ESM  |2 nationallicence 
700 1 |a Krapp  |D Mario  |u Max Planck Institute for Meteorology, Hamburg, Germany  |4 aut 
700 1 |a Jungclaus  |D Johann  |u Max Planck Institute for Meteorology, Hamburg, Germany  |4 aut 
773 0 |t Climate Dynamics  |d Springer Berlin Heidelberg  |g 44/9-10(2015-05-01), 2609-2621  |x 0930-7575  |q 44:9-10<2609  |1 2015  |2 44  |o 382 
856 4 0 |u https://doi.org/10.1007/s00382-014-2456-2  |q text/html  |z Onlinezugriff via DOI 
898 |a BK010053  |b XK010053  |c XK010000 
900 7 |a Metadata rights reserved  |b Springer special CC-BY-NC licence  |2 nationallicence 
908 |D 1  |a research-article  |2 jats 
949 |B NATIONALLICENCE  |F NATIONALLICENCE  |b NL-springer 
950 |B NATIONALLICENCE  |P 856  |E 40  |u https://doi.org/10.1007/s00382-014-2456-2  |q text/html  |z Onlinezugriff via DOI 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Krapp  |D Mario  |u Max Planck Institute for Meteorology, Hamburg, Germany  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Jungclaus  |D Johann  |u Max Planck Institute for Meteorology, Hamburg, Germany  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Climate Dynamics  |d Springer Berlin Heidelberg  |g 44/9-10(2015-05-01), 2609-2621  |x 0930-7575  |q 44:9-10<2609  |1 2015  |2 44  |o 382