DOI: 10.1002/2016GB005398
Scopus记录号: 2-s2.0-84991492528
论文题名: Analysis of longitudinal variations in North Pacific alkalinity to improve predictive algorithms
作者: Fry C ; H ; , Tyrrell T ; , Achterberg E ; P
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期: 10 起始页码: 1493
结束页码: 1508
语种: 英语
英文关键词: algorithm
; alkalinity
; North Pacific
; ocean circulation
; tracers
Scopus关键词: algorithm
; alkalinity
; calcium carbonate
; carbon cycle
; continental shelf
; isopycnal layer
; longitudinal gradient
; oceanic circulation
; tracer
; upwelling
; North America
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: The causes of natural variation in alkalinity in the North Pacific surface ocean need to be investigated to understand the carbon cycle and to improve predictive algorithms. We used GLODAPv2 to test hypotheses on the causes of three longitudinal phenomena in Alk*, a tracer of calcium carbonate cycling. These phenomena are (a) an increase from east to west between 45°N and 55°N, (b) an increase from west to east between 25°N and 40°N, and (c) a minor increase from west to east in the equatorial upwelling region. Between 45°N and 55°N, Alk* is higher on the western than on the eastern side, and this is associated with denser isopycnals with higher Alk* lying at shallower depths. Between 25°N and 40°N, upwelling along the North American continental shelf causes higher Alk* in the east. Along the equator, a strong east-west trend was not observed, even though the upwelling on the eastern side of the basin is more intense, because the water brought to the surface is not high in Alk*. We created two algorithms to predict alkalinity, one for the entire Pacific Ocean north of 30°S and one for the eastern margin. The Pacific Ocean algorithm is more accurate than the commonly used algorithm published by Lee et al. (2006), of similar accuracy to the best previously published algorithm by Sasse et al. (2013), and is less biased with longitude than other algorithms in the subpolar North Pacific. Our eastern margin algorithm is more accurate than previously published algorithms. ©2016. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77808
Appears in Collections: 气候变化事实与影响
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作者单位: National Oceanography Centre Southampton, University of Southampton, Southampton, United Kingdom; GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany
Recommended Citation:
Fry C,H,, Tyrrell T,et al. Analysis of longitudinal variations in North Pacific alkalinity to improve predictive algorithms[J]. Global Biogeochemical Cycles,2016-01-01,30(10)