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Volumn 308, Issue 5728, 2005, Pages 1611-1615

Paleoclimate: Rapid acidification of the ocean during the paleocene-eocene thermal maximum

Author keywords

[No Author keywords available]

Indexed keywords

ACIDIFICATION; OCEAN ABSORPTION; PALEOCENE-EOCENE THERMAL MAXIMUM (PETM); SEQUESTRATION;

EID: 20444405350     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1109004     Document Type: Article
Times cited : (942)

References (39)
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    • note
    • The lysocline, also referred tc as the calcite saturation horizon, represents the depth in the ocean where the carbonate ion concentration falls below the saturation level (currently ∼4 km in the South Atlantic). Carbonate accumulation can occur below this level if the flux of carbonate to the sen floor exceeds the rate at which it dissolves. The depth at which dissolution is greater than the flux and where carbonate does not accumulate defines the CCD.
  • 17
    • 20444405446 scopus 로고
    • U.S. Government Printing Office, Washington, DC
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    • (1984) Leg 74 , vol.74
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  • 18
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    • J. C. Zachos et al., Proc. ODP Init. Rep., 208 (2004), available at http://www-odp.tamu.edu/publications/ 208_IR/208ir.htm.
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    • Zachos, J.C.1
  • 19
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    • note
    • Paleodepths of the Leg 208 sites at 55 million years ago (Ma) were estimated using a standard thermal subsidence curve and a sediment accumulation model (18). At 55 Ma, the paleodepths of sites 1263 and 1262 were 1.5 and 3.6 km, respectively.
  • 20
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    • note
    • Materials and methods are available as supporting material on Science Online.
  • 21
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    • note
    • The initial phase of dissolution would involve Paleocene sediments already present on the sea floor. As such, the base of the clay layer, perhaps as much as a few centimeters in the deepest site, was deposited before the carbon isotope excursion. The traces of carbonate remaining must be a mixture of pre-excursion and excursion fragments that survived dissolution.
  • 24
    • 20444431337 scopus 로고    scopus 로고
    • note
    • 2 for each unit of silicate weathered.
  • 28
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  • 38
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    • note
    • 2 will accumulate in the atmosphere and surface ocean before It can be conveyed to the deep sea to be neutralized (27).
  • 39
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    • note
    • We thank the ODP Leg 208 Science Crew for their contributions and C. John and S. Bohaty for technical assistance. The ODP supplied samples. Supported by NSF grant EAR-0120727 to J.C.Z. and E.T. and by DFC grant no. Ro 1113/3 to U.R.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.