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Walker Circulation

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Journal Article
Journal: Geology
Published: 01 May 2005
Geology (2005) 33 (5): 389-392.
...Erin L. McClymont; Antoni Rosell-Melé Abstract Sea-surface temperatures (SSTs) reconstructed from Ocean Drilling Program Sites 806 and 849 in the western and eastern equatorial Pacific provide a history of the strength of the Walker circulation between 1.5 and 0.5 Ma. A progressive cooling...
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Journal Article
Journal: GSA Bulletin
Published: 01 March 2002
GSA Bulletin (2002) 114 (3): 349-366.
... the Altiplano, effectively blocking moisture transport to the Atacama Desert. Here, we suggest that precipitation variations on millennial time scales in the central Atacama are the result of extraregional forcing of the South American Summer Monsoon through intensified Walker Circulation (stronger easterlies...
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Journal Article
Journal: Geology
Published: 01 February 1998
Geology (1998) 26 (2): 147-150.
... regional temperatures over the continent and changes in atmospheric circulation (stronger Walker circulation) produced the observed periods of increased effective precipitation. Geological Society of America 1998 ...
Journal Article
Published: 25 March 2019
Journal of Sedimentary Research (2019) 89 (3): 242-252.
... of the Indonesian seaway and the onset of ice growth in the northern hemisphere and in Antarctica that led to the long-term strengthening of the Walker circulation and affected low-latitude zonal gradient. The IODP Site U1338 (2° 30.469′ N, 117° 58.178′ W, 4200 meters water depth, leg 321) was drilled in the EEP...
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Journal Article
Journal: Geology
Published: 19 May 2017
Geology (2017) 45 (8): 683-686.
... in tropical Africa at a time when zonal Walker circulation increasingly affected global climate, new stone technologies emerged, and the genus Homo spread beyond Africa. Authigenic and diagenetic minerals including clay minerals, zeolites, K-feldspar, chert, calcite, and dolomite precipitated in a complex...
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Journal Article
Journal: Geology
Published: 01 August 2016
Geology (2016) 44 (8): 671-674.
...J.N. Richey; J.P. Sachs Abstract Modern seasonal and inter-annual precipitation variability in Palau is linked to both meridional movement of the Intertropical Convergence Zone (ITCZ) and changes in the Pacific Walker Circulation (PWC) associated with the El Niño–Southern Oscillation. Thus, Palau’s...
Journal Article
Journal: Geology
Published: 01 January 2007
Geology (2007) 35 (1): 1-4.
... correlate with decreased rainfall, the opposite to that observed in the Asian monsoon, and suggest that a solar link to Holocene climate is through changes in the Walker circulation and the Pacific Decadal Oscillation and El Niño–Southern Oscillation systems of the tropical Pacific Ocean. Given the link...
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Journal Article
Journal: GSA Bulletin
Published: 01 March 2002
GSA Bulletin (2002) 114 (3): 334-348.
... period in the central Atacama (>15.4–9 ka), however, coincides with a minimum in austral-summer insolation at 10 ka, suggesting that regional summer insolation is not a dominant influence on the SASM. Instead, intensification of the SASM may be linked to extraregional forcings such as the Walker...
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Journal Article
Journal: Geosphere
Published: 01 October 2013
Geosphere (2013) 9 (5): 1147-1160.
...Cathy J. Busby Abstract The Walker Lane belt of eastern California and western Nevada is the northernmost extension of the Gulf of California transtensional rift, where the process of continental rupture has not yet been completed, and rift initiation can be studied on land. GPS and earthquake...
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Journal Article
Journal: Geology
Published: 01 June 2012
Geology (2012) 40 (6): 499-502.
... environmental forcing, but the inability to date ancient stromatolites precludes an understanding of the lamination formation processes. We use high-resolution 14 C dating of Holocene stromatolites from Walker Lake, Nevada (United States), to construct a record of lamination rate over the course of accretion...
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Series: Geological Society, London, Memoirs
Published: 01 January 2002
DOI: 10.1144/GSL.MEM.2002.025.01.07
EISBN: 9781862394001
... by Walker), which chiefly occurred near the margins of the acidic rocks. Such an association of mixed acid and basic rocks interested Harker of course, and it is not surprising that they also attracted Rastall’s attention. He thought that they might be explained by the ideas of the Norwegian geologist...
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Journal Article
Journal: Elements
Published: 01 February 2011
Elements (2011) 7 (1): 17-22.
... processing in low-mass AGB stars. These grain data, and also those for presolar SiC, provide additional constraints on this extra mixing process. For example, while 13 C production and 18 O destruction are dependent on the circulation rate, 26 Al production is dependent on the temperature reached...
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Journal Article
Journal: Economic Geology
Published: 01 June 2013
Economic Geology (2013) 108 (4): 585-604.
... the covered area farther south and west and at greater depth. Eventually, only two reverse-circulation holes, totaling 532 m, were drilled on the porphyry gold-copper target during the 1997 to 1998 season, both designed to test the magnetic high. The best results, 224 m averaging 0.14 g/t Au, were...
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Journal Article
Published: 01 January 2008
Reviews in Mineralogy and Geochemistry (2008) 68 (1): 31-53.
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Journal Article
Journal: Geology
Published: 01 April 2004
Geology (2004) 32 (4): 317-320.
... on opposite sides of a continent. The Walker circulation allows strengthening of circulation at one side and relaxation at the other, causing opposite climate anomalies ( Rind et al., 2001 ). The consistent regionality of the antiphased climate records presented here suggests a centennial-scale expression...
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Journal Article
Journal: Geology
Published: 12 December 2017
Geology (2017) 46 (2): 143-146.
...Thomas J. Algeo; Achim D. Herrmann Abstract The Late Pennsylvanian Midcontinent Sea (LPMS) of North America, which existed during glacioeustatic highstands of the late Paleozoic ice age, was an immense (>1 × 10 6 km 2 ) cratonic interior sea exhibiting large-scale estuarine circulation...
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Journal Article
Journal: Geology
Published: 01 March 2017
Geology (2017) 45 (3): 195-198.
... and multiple marine and terrestrial records across the North Atlantic suggests that glaciers are strongly influenced by changes in ocean circulation and consequently implies that the ocean-cryosphere teleconnection is a persistent feature of the Arctic system. West Greenland is ideally suited to examine...
Journal Article
Published: 01 September 2013
Journal of Sedimentary Research (2013) 83 (9): 786-802.
... deflation of these fluvial systems within an easterly to southeasterly and seasonal westerly to northwesterly atmospheric circulation. Monsoonal transport, especially northern excursions of the ITCZ during northern hemisphere summers, would have facilitated transport from terranes south of the Ouachita...
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Journal Article
Journal: Geosphere
Published: 24 October 2018
Geosphere (2018) 14 (6): 2337-2354.
...Glenn Spinelli; Ikuko Wada; Kelin Wang; Jiangheng He; Robert Harris; Michael Underwood Abstract The redistribution of heat by fluid circulation in subducting igneous crust generates thermal anomalies that can affect the alteration of material both within a subduction zone and in the incoming plate...
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Journal Article
Journal: Geology
Published: 01 March 2011
Geology (2011) 39 (3): 207-210.
... it originated in expansive epicontinental seas ( Shaw, 1964 ; Irwin, 1965 ; Hallam, 1975 ; Allison and Briggs, 1993 ; Allison and Wells, 2006 ). The way that water circulated in these seas, and affected the sedimentary environments that supported life and promoted evolution and fossil preservation...
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