Author: 毛特立Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The Variation of the Thermocline Structure in the Southern Marginal West Pacific Warm Pool During 2.2-3.2 Million Years Ago
Author: 毛特立Pleistocene Nutrient, Thermocline, and Bottom Current Dynamics in the South Pacific Sector of the Western Pacific Warm Pool
Author: Jonathan Edward LambertPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
I also identify a period between 100 and 60 ka during a potential reorganization of the upper water column in which variability in productivity occurs at a higher frequency than that of precession. Finally, while also related to ITCZ shifts, a nearby record closer to the equator is phase-lagged from Site U1486 - emphasizing the fine-scale regional differences in the drivers of primary productivity in the WPWP.
ON THE INSTABILITY OF TROPICAL WESTERN PACIFIC WARM POOL DURING THE BOREAL WINTER AND SPRING.
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
A source of instability in the western Pacific warm pool is shown to be due to sea surface elevation variations caused by changes in the zonal sea-surface temperature (SST) gradient and the changes in the Pacific Ocean basin length in relation to the warm pool latitudinal location. The variation of the sea-surface elevation is measured by using the thermocline depth response calculated from a two-layer ocean. The warm pool is shown to be barely at equilibrium during the boreal late winter and early spring by comparing the measured thermocline at 110°W, 0°E with the calculated thermocline depth. Based on this analysis, a failure or reversal of the climatological zonal winds are apparently not a necessary precursor for the instability of the warm pool and initiation of a warm event. A warm event can be initiated by an increase in the size of the warm pool and/or an increase in zonal SST differences during the boreal/winter spring. This mechanism could be an alternate mechanism for El-Nino Southern Oscillation (ENSO) dynamics to that postulated by Bjeknes (1969).
The Form of the Temperature-salinity Relationship in the Thermocline of the Western Pacific Ocean
Author: Katarzyna WarmusPublisher:
ISBN:
Category : Ocean temperature
Languages : en
Pages : 168
Book Description
Modern and Past Climate Variability in the Eastern Pacific Warm Pool
Author: Heather M. BenwayPublisher:
ISBN:
Category : Paleoceanography
Languages : en
Pages : 232
Book Description
Variations in Surface and Thermocline Conditions of the Western Pacific Warm Pool
Author: Martina HollsteinInterannual variations in the main thermocline in the western North Pacific along the 137E meridian
Author: Shinichi BesshoOn the Evolution of the Western Equatorial Pacific Warm Pool During the TOGA COARE IOP
Author: Eric AntonissenPublisher:
ISBN:
Category : Ocean circulation
Languages : en
Pages : 382
Book Description
Oscillations in the southern extent of the Indo-Pacific Warm Pool during the mid-Holocene
Author: N.J. ABRAMLate Pleistocene Central Equatorial Pacific Temperature Drivers
Author: Victoria YuanPublisher:
ISBN: 9780438249455
Category :
Languages : en
Pages : 60
Book Description
Tropical Pacific sea surface temperatures (SSTs) are a critical component of the global climate system with oceanic and atmospheric teleconnections through meridional and latitudinal heat transport. Understanding the climate drivers and dynamics of this region enables a better understanding of global climate. Orbital scale climate drivers for eastern and western Pacific SSTs have been studied; however, SSTs and thermocline structure have not been studied in the central equatorial Pacific (CEP). Studying temperature dynamics in the CEP upper water column can help determine which mechanisms control SST and thermocline structure and test previously proposed hypotheses. Here, I present CEP SST and subsurface temperature records from the Line Islands (ML1208-17PC) that span the last 380,000 years. Using two species of foraminifera, G. ruber and G. tumida, I respectively generated Mg/Ca based SST and subsurface temperature records and compared them to published records from the equatorial Pacific. This comparison indicates an expanded west pacific warm pool (WPWP) during interglacial periods but no expansion of the eastern Pacific cold tongue during glacial periods. Based on the thermocline depth proxy, the thermocline was deeper in glacial periods and shallower in interglacial periods. Cross-spectral analysis demonstrates which climate drivers are the likely forcings for CEP SST and thermocline behavior. The CEP SSTs are distinct from those to the east or the west as they are not directly driven by CO2 or insolation at orbital frequencies; instead, the CEP SST record is linked to subsurface temperature at eccentricity and obliquity bands. However, changes in thermocline conditions at the CEP are potentially driven by CO2 and Antarctic temperature changes. This study agrees and supports previous studies that indicate deeper thermocline depths in glacials and shallower depths in interglacials.