DOI: 10.1002/2015GB005198
Scopus记录号: 2-s2.0-84946555501
论文题名: Climatological distribution of aragonite saturation state in the global oceans
作者: Jiang L ; -Q ; , Feely R ; A ; , Carter B ; R ; , Greeley D ; J ; , Gledhill D ; K ; , Arzayus K ; M
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期: 10 起始页码: 1656
结束页码: 1673
语种: 英语
英文关键词: aragonite saturation state
; climatology
; global oceans
; ocean acidification
; omega
; pH
Scopus关键词: acidification
; air-sea interaction
; alkalinity
; aragonite
; carbon dioxide
; climatology
; dissolved inorganic carbon
; gas exchange
; global ocean
; hydrostatic pressure
; organic matter
; solubility
; supersaturation
; temperature effect
; thermohaline circulation
; water temperature
; Atlantic Ocean
; Pacific Ocean
英文摘要: Aragonite saturation state (Ωarag) in surface and subsurface waters of the global oceans was calculated from up-to-date (through the year of 2012) ocean station dissolved inorganic carbon (DIC) and total alkalinity (TA) data. Surface Ωarag in the open ocean was always supersaturated (Ω > 1), ranging between 1.1 and 4.2. It was above 2.0 (2.0-4.2) between 40°N and 40°S but decreased toward higher latitude to below 1.5 in polar areas. The influences of water temperature on the TA/DIC ratio, combined with the temperature effects on inorganic carbon equilibrium and apparent solubility product (K′sp), explain the latitudinal differences in surface Ωarag. Vertically, Ωarag was highest in the surface mixed layer. Higher hydrostatic pressure, lower water temperature, and more CO2 buildup from biological activity in the absence of air-sea gas exchange helped maintain lower Ωarag in the deep ocean. Below the thermocline, aerobic decomposition of organic matter along the pathway of global thermohaline circulation played an important role in controlling Ωarag distributions. Seasonally, surface Ωarag above 30° latitudes was about 0.06 to 0.55 higher during warmer months than during colder months in the open-ocean waters of both hemispheres. Decadal changes of Ωarag in the Atlantic and Pacific Oceans showed that Ωarag in waters shallower than 100 m depth decreased by 0.10 ± 0.09 (-0.40 ± 0.37% yr-1) on average from the decade spanning 1989-1998 to the decade spanning 1998-2010. © Published 2015. American Geophysical Union. This article is a US Government work and, as such, is in the public domain in the United States of America. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77930
Appears in Collections: 气候变化事实与影响
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作者单位: Cooperative Institute for Climate and Satellites, Earth System Science Interdisciplinary Center, University of Maryland, College ParkMD, United States; Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, WA, United States; Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, WA, United States; Ocean Acidification Program, National Oceanic and Atmospheric Administration, Silver Spring, MD, United States; National Centers for Environmental Information, National Oceanic and Atmospheric Administration, Silver Spring, MD, United States
Recommended Citation:
Jiang L,-Q,, Feely R,et al. Climatological distribution of aragonite saturation state in the global oceans[J]. Global Biogeochemical Cycles,2015-01-01,29(10)