DOI: 10.1016/j.gloplacha.2015.07.001
论文题名: Regional and global significance of Pliocene sea surface temperatures from the Gulf of Cadiz (Site U1387) and the Mediterranean
作者: Tzanova A. ; Herbert T.D.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2015
卷: 133 起始页码: 371
结束页码: 377
语种: 英语
英文关键词: Alkenones
; IODP Expedition 339
; Mediterranean
; MOW
; Pliocene
; Sea surface temperatures
Scopus关键词: Atmospheric temperature
; Glacial geology
; Heat losses
; Submarine geophysics
; Surface properties
; Surface waters
; Alkenones
; IODP Expedition 339
; Mediterranean
; MOW
; Pliocene
; Sea surface temperature (SST)
; Oceanography
; alkenone
; deep water formation
; glaciation
; global ocean
; latent heat flux
; Northern Hemisphere
; oceanic circulation
; outflow
; Pliocene
; reconstruction
; sea surface temperature
; trend analysis
; water exchange
; Atlantic Ocean
; Atlantic Ocean (North)
; Gulf of Cadiz
; Italy
; Mediterranean Sea
; North Africa
; Sicily
; Strait of Gibraltar
英文摘要: The Atlantic-Mediterranean water exchange is a component of global ocean circulation capable of influencing deep water formation in the North Atlantic, yet it is poorly constrained for the time period preceding the intensification of Northern Hemisphere Glaciation (NHG). The sea surface temperature (SST) gradient between the Atlantic and Mediterranean sides of the Strait of Gibraltar can shed light on the communication between the two basins. IODP Site U1387 in the Gulf of Cadiz provides the first alkenone based reconstruction of SST for the Atlantic waters that flowed into the Mediterranean Sea during the Pliocene. This site reflects open ocean North Atlantic subtropical temperature trends while the published SST records from the Rossello composite section (Sicily) in the Mediterranean reflect the addition of regional, continentally-influenced signals from Europe and Northern Africa. The Mediterranean, in particular, may be influenced by high latitude Northern hemisphere climatic evolution. In the modern regime the sites discussed in this work have comparable SST and uninhibited surface connection; however, change in local heat loss/gain over the Mediterranean due to variability in latent heat loss and obstructed connection can result in a gradient between the sites in the Pliocene. The Pliocene surface waters of the Gulf of Cadiz and the Mediterranean Sea were as much as 7 °C warmer than the modern average of ~ 19-20 °C. The reconstructed temperatures show a ~ 1 °C cooling for the Atlantic side of the Strait of Gibraltar from ~ 6 Ma to ~ 2.7 Ma and increasingly cooler glacials. The long-term SST record from Site U1387 provides a basis for future studies into the hydrological balance of the Mediterranean and the temperature component of Mediterranean Outflow Water (MOW) density. We compared SST on either side of Gibraltar between ~. 3.4-2.7 Ma and found that between ~ 2.7 and ~ 3.1 Ma the Mediterranean and Atlantic surface waters show comparable average temperatures and comparable variance. © 2015 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946475561&doi=10.1016%2fj.gloplacha.2015.07.001&partnerID=40&md5=3e5c11d63681f997a6366d7285cc8e96
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11562
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
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作者单位: Department of Earth Environmental and Planetary Sciences, Brown University, 324 Brook Street, Providence, RI, United States
Recommended Citation:
Tzanova A.,Herbert T.D.. Regional and global significance of Pliocene sea surface temperatures from the Gulf of Cadiz (Site U1387) and the Mediterranean[J]. Global and Planetary Change,2015-01-01,133.