scholarly journals Erratum to: Seasonal variability of zonal heat advection in the mixed layer of the tropical Pacific

2014 ◽  
Vol 32 (1) ◽  
pp. 240-240
Author(s):  
Cong Guan ◽  
Yongli Chen ◽  
Fan Wang
Keyword(s):  
Mixed Layer ◽  
Seasonal Variability ◽  
Tropical Pacific ◽  
Heat Advection ◽  
The Tropical Pacific

Revisit of seasonal variability of subsurface temperature in the tropical Pacific with Argo data

2020 ◽  
Vol 204 ◽  
pp. 103312 ◽  
Author(s):  
Yuchao Hui ◽  
Linlin Zhang ◽  
Fujun Wang ◽  
Xiaomei Yan
Keyword(s):  
Seasonal Variability ◽  
Tropical Pacific ◽  
Subsurface Temperature ◽  
Argo Data ◽  
The Tropical Pacific

scholarly journals Dipole Structure of Mixed Layer Salinity in Response to El Niño‐La Niña Asymmetry in the Tropical Pacific

2019 ◽  
Vol 46 (21) ◽  
pp. 12165-12172 ◽  
Author(s):  
Cong Guan ◽  
Shijian Hu ◽  
Michael J. McPhaden ◽  
Fan Wang ◽  
Shan Gao ◽  
...  
Keyword(s):  
Mixed Layer ◽  
El Niño ◽  
El Nino ◽  
Tropical Pacific ◽  
La Niña ◽  
Dipole Structure ◽  
La Nina ◽  
The Tropical Pacific

scholarly journals Biophysical Feedbacks in the Tropical Pacific

2005 ◽  
Vol 18 (1) ◽  
pp. 58-70 ◽  
Author(s):  
Ben Marzeion ◽  
Axel Timmermann ◽  
Ragu Murtugudde ◽  
Fei-Fei Jin
Keyword(s):  
Mixed Layer ◽  
Annual Cycle ◽  
Southern Oscillation ◽  
Heat Budget ◽  
Tropical Pacific ◽  
Shortwave Radiation ◽  
Bjerknes Feedback ◽  
Mean State ◽  
Chlorophyll Concentrations ◽  
The Tropical Pacific

Abstract This study explores the influence of phytoplankton on the tropical Pacific heat budget. A hybrid coupled model for the tropical Pacific that is based on a primitive equation reduced-gravity multilayer ocean model, a dynamic ocean mixed layer, an atmospheric mixed layer, and a statistical atmosphere is used. The statistical atmosphere relates deviations of the sea surface temperature from its mean to wind stress anomalies and allows for the rectification of the annual cycle and the El Niño–Southern Oscillation (ENSO) phenomenon through the positive Bjerknes feedback. Furthermore, a nine-component ecosystem model is coupled to the physical variables of the ocean. The simulated chlorophyll concentrations can feed back onto the ocean heat budget by their optical properties, which modify solar light absorption in the surface layers. It is shown that both the surface layer concentration as well as the vertical profile of chlorophyll have a significant effect on the simulated mean state, the tropical annual cycle, and ENSO. This study supports a previously suggested hypothesis (Timmermann and Jin) that predicts an influence of phytoplankton concentration of the tropical Pacific climate mean state and its variability. The bioclimate feedback diagnosed here works as follows: Maxima in the subsurface chlorophyll concentrations lead to an enhanced subsurface warming due to the absorption of photosynthetically available shortwave radiation. This warming triggers a deepening of the mixed layer in the eastern equatorial Pacific and eventually a reduction of the surface ocean currents (Murtugudde et al.). The weakened south-equatorial current generates an eastern Pacific surface warming, which is strongly enhanced by the Bjerknes feedback. Because of the deepening of the mixed layer, the strength of the simulated annual cycle is also diminished. This in turn leads to an increase in ENSO variability.

scholarly journals Understanding the Mid-Holocene Climate

2006 ◽  
Vol 19 (12) ◽  
pp. 2801-2817 ◽  
Author(s):  
Sang-Ik Shin ◽  
Prashant D. Sardeshmukh ◽  
Robert S. Webb ◽  
Robert J. Oglesby ◽  
Joseph J. Barsugli
Keyword(s):  
North America ◽  
Mixed Layer ◽  
North Africa ◽  
General Circulation ◽  
Circulation Model ◽  
Tropical Pacific ◽  
La Niña ◽  
La Nina ◽  
Mixed Layer Ocean ◽  
The Tropical Pacific

Abstract Paleoclimatic evidence suggests that during the mid-Holocene epoch (about 6000 yr ago) North America and North Africa were significantly drier and wetter, respectively, than at present. Modeling efforts to attribute these differences to changes in orbital parameters and greenhouse gas (GHG) levels have had limited success, especially over North America. In this study, the importance of a possibly cooler tropical Pacific Ocean during the epoch (akin to a permanent La Niña–like perturbation to the present climate) in causing these differences is emphasized. Systematic sets of atmospheric general circulation model experiments, with prescribed sea surface temperatures (SSTs) in the tropical Pacific basin and an interactive mixed layer ocean elsewhere, are performed. Given the inadequacies of current fully coupled climate models in simulating the tropical Pacific climate, this intermediate coupling model configuration is argued to be more suitable for quantifying the contributions of the altered orbital forcing, GHG levels, and tropical Pacific SST conditions to the different mid-Holocene climates. The simulated responses in this configuration are in fact generally more consistent with the available evidence from paleovegetation and sedimentary records. Coupling to the mixed layer ocean enhances the wind–evaporation–SST feedback over the tropical Atlantic Ocean. The net response to the orbital changes is to shift the North Atlantic intertropical convergence zone (ITCZ) northward, and make North Africa wetter. The response to the reduced GHG levels opposes, but does not eliminate, these changes. The northward-shifted ITCZ also blocks the moisture supply from the Gulf of Mexico into North America. This drying tendency is greatly amplified by the local response to La Niña–like conditions in the tropical Pacific. Consistent with the paleoclimatic evidence, the simulated North American drying is also most pronounced in the growing (spring) season.

The Seasonal Variability in a Model of the Tropical Pacific

1980 ◽  
Vol 10 (12) ◽  
pp. 1929-1951 ◽  
Author(s):  
Antonio J. Busalacchi ◽  
James J. O'Brien
Keyword(s):  
Seasonal Variability ◽  
Tropical Pacific ◽  
The Tropical Pacific
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