Understanding the El Niño-like oceanic response in the tropical Pacific to global warming

Verfasser / Beitragende:
[Yiyong Luo, Jian Lu, Fukai Liu, Wei Liu]
Ort, Verlag, Jahr:
2015
Enthalten in:
Climate Dynamics, 45/7-8(2015-10-01), 1945-1964
Format:
Artikel (online)
ID: 605471495
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024 7 0 |a 10.1007/s00382-014-2448-2  |2 doi 
035 |a (NATIONALLICENCE)springer-10.1007/s00382-014-2448-2 
245 0 0 |a Understanding the El Niño-like oceanic response in the tropical Pacific to global warming  |h [Elektronische Daten]  |c [Yiyong Luo, Jian Lu, Fukai Liu, Wei Liu] 
520 3 |a The enhanced central and eastern Pacific SST warming and the associated ocean processes under global warming are investigated using the ocean component of the Community Earth System Model (CESM), Parallel Ocean Program version 2 (POP2). The tropical SST warming pattern in the coupled CESM can be faithfully reproduced by the POP2 forced with surface fluxes computed using the aerodynamic bulk formula. By prescribing the wind stress and/or wind speed through the bulk formula, the effects of wind stress change and/or the wind-evaporation-SST (WES) feedback are isolated and their linearity is evaluated in this ocean-alone setting. Result shows that, although the weakening of the equatorial easterlies contributes positively to the El Niño-like SST warming, 80% of which can be simulated by the POP2 without considering the effects of wind change in both mechanical and thermodynamic fluxes. This result points to the importance of the air-sea thermal interaction and the relative feebleness of the ocean dynamical process in the El Niño-like equatorial Pacific SST response to global warming. On the other hand, the wind stress change is found to play a dominant role in the oceanic response in the tropical Pacific, accounting for most of the changes in the equatorial ocean current system and thermal structures, including the weakening of the surface westward currents, the enhancement of the near-surface stratification and the shoaling of the equatorial thermocline. Interestingly, greenhouse gas warming in the absence of wind stress change and WES feedback also contributes substantially to the changes at the subsurface equatorial Pacific. Further, this warming impact can be largely replicated by an idealized ocean experiment forced by a uniform surface heat flux, whereby, arguably, a purest form of oceanic dynamical thermostat is revealed. 
540 |a Springer-Verlag Berlin Heidelberg, 2014 
690 7 |a El Niño-like response  |2 nationallicence 
690 7 |a Global warming  |2 nationallicence 
690 7 |a Thermocline  |2 nationallicence 
690 7 |a Oceanic dynamical thermostat  |2 nationallicence 
700 1 |a Luo  |D Yiyong  |u Physical Oceanography Laboratory, Ocean University of China, Qingdao, China  |4 aut 
700 1 |a Lu  |D Jian  |u Atmospheric Sciences and GlobalChange Division, Pacific Northwest NationalLaboratory, Richland, WA, USA  |4 aut 
700 1 |a Liu  |D Fukai  |u Physical Oceanography Laboratory, Ocean University of China, Qingdao, China  |4 aut 
700 1 |a Liu  |D Wei  |u Scripps Institution of Oceanography, San Diego, CA, USA  |4 aut 
773 0 |t Climate Dynamics  |d Springer Berlin Heidelberg  |g 45/7-8(2015-10-01), 1945-1964  |x 0930-7575  |q 45:7-8<1945  |1 2015  |2 45  |o 382 
856 4 0 |u https://doi.org/10.1007/s00382-014-2448-2  |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/s00382-014-2448-2  |q text/html  |z Onlinezugriff via DOI 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Luo  |D Yiyong  |u Physical Oceanography Laboratory, Ocean University of China, Qingdao, China  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Lu  |D Jian  |u Atmospheric Sciences and GlobalChange Division, Pacific Northwest NationalLaboratory, Richland, WA, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Liu  |D Fukai  |u Physical Oceanography Laboratory, Ocean University of China, Qingdao, China  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Liu  |D Wei  |u Scripps Institution of Oceanography, San Diego, CA, USA  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Climate Dynamics  |d Springer Berlin Heidelberg  |g 45/7-8(2015-10-01), 1945-1964  |x 0930-7575  |q 45:7-8<1945  |1 2015  |2 45  |o 382