DOI: 10.1016/j.epsl.2017.11.026
Scopus记录号: 2-s2.0-85037366448
论文题名: The effects of temperature, salinity, and the carbonate system on Mg/Ca in Globigerinoides ruber (white): A global sediment trap calibration
作者: Gray W.R. ; Weldeab S. ; Lea D.W. ; Rosenthal Y. ; Gruber N. ; Donner B. ; Fischer G.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 482 起始页码: 607
结束页码: 620
语种: 英语
英文关键词: carbonate chemistry
; Mg/Ca
; planktic foraminifera
; salinity
; SST
Scopus关键词: Calibration
; Carbonation
; Magnesium
; pH
; Sediment traps
; Surface waters
; Temperature
; Tropics
; Controlling parameters
; Effects of temperature
; Last Glacial Maximum
; Oceanic conditions
; Planktic foraminifera
; salinity
; Sea surface temperature (SST)
; Temperature sensitivity
; Oceanography
; accuracy assessment
; calcium
; calibration
; carbonate system
; foraminifera
; magnesium
; salinity
; sea surface temperature
; sediment chemistry
; sediment trap
; temperature effect
; Arabian Sea
; Atlantic Ocean
; Atlantic Ocean (Tropical)
; Bay of Bengal
; Indian Ocean
; Foraminifera
; Globigerinoides ruber
英文摘要: The Mg/Ca of planktic foraminifera Globigerinoides ruber (white) is a widely applied proxy for tropical and sub-tropical sea-surface temperature. The accuracy with which temperature can be reconstructed depends on how accurately relationships between Mg/Ca and temperature and the multiple secondary controls on Mg/Ca are known; however, these relationships remain poorly quantified under oceanic conditions. Here, we present new calibrations based on 440 sediment trap/plankton tow samples from the Atlantic, Pacific and Indian Oceans, including 130 new samples from the Bay of Bengal/Arabian Sea and the tropical Atlantic Ocean. Our results indicate temperature, salinity and the carbonate system all significantly influence Mg/Ca in G. ruber (white). We propose two calibration models: The first model assumes pH is the controlling carbonate system parameter. In this model, Mg/Ca has a temperature sensitivity of 6.0±0.8%/°C (2σ), a salinity sensitivity of 3.3±2.2%/PSU and a pH sensitivity of −8.3±7.7%/0.1 pH units; The second model assumes carbonate ion concentration ([CO32−]) is the controlling carbonate system parameter. In this model, Mg/Ca has a temperature sensitivity of 6.7±0.8%/°C, a salinity sensitivity of 5.0±3.0%/PSU and a [CO32−] sensitivity of −0.24±0.11%/μmol kg−1. In both models, the temperature sensitivity is significantly lower than the widely-applied sensitivity of 9.0±0.6%/°C. Application of our new calibrations to down-core data from the Last Glacial Maximum, considering whole ocean changes in salinity and carbonate chemistry, indicate a cooling of 2.4±1.6°C in the tropical oceans if pH is the controlling parameter and 1.5±1.4°C if [CO32−] is the controlling parameter. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110112
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Earth Science, Marine Science Institute, University of California, Santa Barbara, CA, United States; Marine and Coastal Sciences, Rutgers UniversityNJ, United States; Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, Zürich, Switzerland; MARUM, University of Bremen, Bremen, Germany; Department of Earth and Environmental Sciences, University of St Andrews, St Andrews, United Kingdom
Recommended Citation:
Gray W.R.,Weldeab S.,Lea D.W.,et al. The effects of temperature, salinity, and the carbonate system on Mg/Ca in Globigerinoides ruber (white): A global sediment trap calibration[J]. Earth and Planetary Science Letters,2018-01-01,482