Ventilation changes in the western North Pacific since the last glacial period
نویسندگان
چکیده
منابع مشابه
Varied response of western Pacific hydrology to climate forcings over the last glacial period.
Atmospheric deep convection in the west Pacific plays a key role in the global heat and moisture budgets, yet its response to orbital and abrupt climate change events is poorly resolved. Here, we present four absolutely dated, overlapping stalagmite oxygen isotopic records from northern Borneo that span most of the last glacial cycle. The records suggest that northern Borneo's hydroclimate shif...
متن کاملWestern Pacific thermocline structure and the Pacific marine Intertropical Convergence Zone during the Last Glacial Maximum
Paleoclimate proxy evidence suggests a southward shift of the Intertropical Convergence Zone (ITCZ) during times of Northern Hemisphere cooling, including the Last Glacial Maximum, 19–23 ka before present. However, evidence for movement over the Pacific has mainly been limited to precipitation reconstructions near the continents, and the position of the Pacific marine ITCZ is less well constrai...
متن کاملClimate, CO2, and the history of North American grasses since the Last Glacial Maximum.
The spread of C4 grasses in the late Neogene is one of the most important ecological transitions of the Cenozoic, but the primary driver of this global expansion is widely debated. We use the stable carbon isotopic composition (δ(13)C) of bison and mammoth tissues as a proxy for the relative abundance of C3 and C4 vegetation in their grazing habitat to determine climatic and atmospheric CO2 con...
متن کاملSurface temperature control in the North and tropical Pacific during the last glacial maximum
Based on coupled modelling evidence we argue that topographically-induced modifications of the largescale atmospheric circulation during the last glacial maximum may have led to a reduction of the westerlies, and a slowdown of the Pacific subtropical gyre as well as to an intensification of the Pacific subtropical cell. These oceanic circulation changes generate an eastern North Pacific warming...
متن کاملGlacial/interglacial changes in subarctic north pacific stratification.
Since the first evidence of low algal productivity during ice ages in the Antarctic Zone of the Southern Ocean was discovered, there has been debate as to whether it was associated with increased polar ocean stratification or with sea-ice cover, shortening the productive season. The sediment concentration of biogenic barium at Ocean Drilling Program site 882 indicates low algal productivity dur...
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ژورنال
عنوان ژورنال: Climate of the Past
سال: 2012
ISSN: 1814-9332
DOI: 10.5194/cp-8-17-2012