Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL073788 |
Decadal changes in Southern Ocean ventilation inferred from deconvolutions of repeat hydrographies | |
Ting, Yu-Heng1; Holzer, Mark1,2 | |
2017-06-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; USA |
英文摘要 | Changes in Southern Ocean ventilation imprint on dissolved gases, nutrients, radiocarbon, temperature, and salinity. We deconvolve tracer measurements for the distribution, G, of times and locations of last ventilation using a maximum-entropy approach. Decadal changes of G are quantified by deconvolving hydrographies measured during the early 1990s and again some 15years later. Our analysis reveals coherent changes across the five meridional sections analyzed: The fraction of water younger than 30years decreased by approximate to 20% per decade south of 40 degrees S in circumpolar deep water (CDW) and increased by approximate to 10% per decade north of approximate to 40 degrees S in subantarctic mode water (SAMW). Ventilation locations shifted, with more water south of 40 degrees S being ventilated north of the subantarctic front. These ventilation changes impacted CFC uptake, with concentrations south of 40 degrees S less than (and north of 40 degrees S higher than) expected for steady flow. The inferred changes imply increased SAMW formation and CDW upwelling consistent with strengthened westerly winds. |
英文关键词 | ocean ventilation tracer deconvolution transport climate change mean age water-mass fraction |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404382600046 |
WOS关键词 | ANTHROPOGENIC CO2 ; CARBON STORAGE ; SEA-ICE ; TIME ; SF6 ; DISTRIBUTIONS ; ATMOSPHERE ; CFC-12 |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27103 |
专题 | 气候变化 |
作者单位 | 1.Univ New South Wales, Sch Math & Stat, Dept Appl Math, Sydney, NSW, Australia; 2.Columbia Univ, Dept Appl Phys & Appl Math, New York, NY USA |
推荐引用方式 GB/T 7714 | Ting, Yu-Heng,Holzer, Mark. Decadal changes in Southern Ocean ventilation inferred from deconvolutions of repeat hydrographies[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(11). |
APA | Ting, Yu-Heng,&Holzer, Mark.(2017).Decadal changes in Southern Ocean ventilation inferred from deconvolutions of repeat hydrographies.GEOPHYSICAL RESEARCH LETTERS,44(11). |
MLA | Ting, Yu-Heng,et al."Decadal changes in Southern Ocean ventilation inferred from deconvolutions of repeat hydrographies".GEOPHYSICAL RESEARCH LETTERS 44.11(2017). |
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