scholarly journals Northern and southern hemisphere controls on seasonal sea surface temperatures in the Indian Ocean during the last deglaciation

2013 ◽  
Vol 28 (4) ◽  
pp. 619-632 ◽  
Author(s):  
Yiming V. Wang ◽  
Guillaume Leduc ◽  
Marcus Regenberg ◽  
Nils Andersen ◽  
Thomas Larsen ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Southern Hemisphere ◽  
Sea Surface ◽  
Sea Surface Temperatures ◽  
Last Deglaciation ◽  
Surface Temperatures ◽  
The Indian Ocean ◽  
The Last Deglaciation

scholarly journals Sea surface temperatures of the western Arabian Sea during the last deglaciation

2007 ◽  
Vol 22 (2) ◽  
Author(s):  
M. H. Saher ◽  
S. J. A. Jung ◽  
H. Elderfield ◽  
M. J. Greaves ◽  
D. Kroon
Keyword(s):  
Arabian Sea ◽  
Sea Surface ◽  
Sea Surface Temperatures ◽  
Last Deglaciation ◽  
Surface Temperatures ◽  
The Last Deglaciation

Correlation between Vegetation in Southwestern Africa and Oceanic Upwelling in the Past 21,000 Years

2000 ◽  
Vol 54 (1) ◽  
pp. 72-80 ◽  
Author(s):  
Ning Shi ◽  
Lydie M. Dupont ◽  
Hans-Jürgen Beug ◽  
Ralph Schneider
Keyword(s):  
Thermohaline Circulation ◽  
Sea Surface ◽  
Pollen Record ◽  
Sea Surface Temperatures ◽  
Last Deglaciation ◽  
Surface Temperatures ◽  
Oceanic Upwelling ◽  
The Last Deglaciation ◽  
The Last Glacial Maximum ◽  
The Last Glacial

Dinoflagellate cyst and pollen records from marine sediments off the southwestern African coast reveal three major aridification periods since the last glaciation and an environmental correlation between land and sea. Abundant pollen of desert, semi-desert, and temperate plants 21,000–17,500 cal yr B.P. show arid and cold conditions in southwestern Africa that correspond to low sea surface temperatures and enhanced upwelling shown by dinoflagellate cysts. Occurrence of Restionaceae in the pollen record suggests northward movement of the winter-rain regime that influenced the study area during the last glacial maximum. Decline of Asteroideae, Restionaceae, and Ericaceae in the pollen record shows that temperate vegetation migrated out of the study area about 17,500 cal yr B.P., probably because of warming during the last deglaciation. The warming in southwestern Africa was associated with weakened upwelling and increased sea surface temperatures, 2000–2800 years earlier than in the Northern Hemisphere. Aridification 14,300–12,600 cal yr B.P. is characterized by a prominent increase of desert and semi-desert pollen without the return of temperate vegetation. This aridification corresponds to enhanced upwelling off Namibia and cooler temperatures in Antarctica, and it might have been influenced by oceanic thermohaline circulation. Aridification 11,000–8900 cal yr B.P. is out of phase with the northern African climate. Reduction of the water vapor supply in southwestern Africa at that time may be related to northward excursions of the Intertropical Convergence Zone.

scholarly journals DETECTION OF MISSING SEA SURFACE TEMPERATURES (SST) DATA IN THE INDIAN OCEAN

2021 ◽  
Vol 18 (1) ◽  
pp. 51-66
Author(s):  
Miftahuddin ◽  
O. Fanny ◽  
S. Ichsan ◽  
Maharani Abu Bakar ◽  
Norizan Mohamed
Keyword(s):  
Indian Ocean ◽  
Sea Surface ◽  
Sea Surface Temperatures ◽  
Surface Temperatures ◽  
The Indian Ocean

Distant origin of circulation changes in the Indian Ocean during the last deglaciation

2006 ◽  
Vol 243 (1-2) ◽  
pp. 244-251 ◽  
Author(s):  
C WAELBROECK ◽  
C LEVI ◽  
J DUPLESSY ◽  
L LABEYRIE ◽  
E MICHEL ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Last Deglaciation ◽  
The Indian Ocean ◽  
The Last Deglaciation ◽  
Circulation Changes

scholarly journals The Meridional Shift of the Midlatitude Westerlies over Arid Central Asia during the Past 21 000 Years Based on the TraCE-21ka Simulations

2020 ◽  
Vol 33 (17) ◽  
pp. 7455-7478
Author(s):  
Nanxuan Jiang ◽  
Qing Yan ◽  
Zhiqing Xu ◽  
Jian Shi ◽  
Ran Zhang
Keyword(s):  
Indian Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Last Deglaciation ◽  
The Past ◽  
The North ◽  
External Forcings ◽  
The Indian Ocean ◽  
The Last Deglaciation ◽  
The North Atlantic

AbstractTo advance our knowledge of the response of midlatitude westerlies to various external forcings, we investigate the meridional shift of midlatitude westerlies over arid central Asia (ACA) during the past 21 000 years, which experienced more varied forcings than the present day based on a set of transient simulations. Our results suggest that the evolution of midlatitude westerlies over ACA and driving factors vary with time and across seasons. In spring, the location of midlatitude westerlies over ACA oscillates largely during the last deglaciation, driven by meltwater fluxes and continental ice sheets, and then shows a long-term equatorward shift during the Holocene controlled by orbital insolation. In summer, orbital insolation dominates the meridional shift of midlatitude westerlies, with poleward and equatorward migration during the last deglaciation and the Holocene, respectively. From a thermodynamic perspective, variations in zonal winds are linked with the meridional temperature gradient based on the thermal wind relationship. From a dynamic perspective, variations in midlatitude westerlies are mainly induced by anomalous sea surface temperatures over the Indian Ocean through the Matsuno–Gill response and over the North Atlantic Ocean by the propagation of Rossby waves, or both, but their relative importance varies across forcings. Additionally, the modeled meridional shift of midlatitude westerlies is broadly consistent with geological evidence, although model–data discrepancies still exist. Overall, our study provides a possible scenario for a meridional shift of midlatitude westerlies over ACA in response to various external forcings during the past 21 000 years and highlights important roles of both the Indian Ocean and the North Atlantic Ocean in regulating Asian westerlies, which may shed light on the behavior of westerlies in the future.

scholarly journals Southern Hemisphere sea-surface temperatures during the Cenomanian–Turonian: Implications for the termination of Oceanic Anoxic Event 2

Geology ◽  
2019 ◽  
Vol 47 (2) ◽  
pp. 131-134 ◽  
Author(s):  
Stuart A. Robinson ◽  
Alexander J. Dickson ◽  
Alana Pain ◽  
Hugh C. Jenkyns ◽  
Charlotte L. O’Brien ◽  
...  
Keyword(s):  
Southern Hemisphere ◽  
Sea Surface ◽  
Sea Surface Temperatures ◽  
Oceanic Anoxic Event ◽  
Surface Temperatures ◽  
Oceanic Anoxic Event 2 ◽  
Anoxic Event
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