气候变化领域集成服务门户(CCPortal): Southern Ocean in-situ temperature trends over 25 years emerge from interannual variability

CCPortal

DOI	10.1038/s41467-020-20781-1
	Southern Ocean in-situ temperature trends over 25 years emerge from interannual variability
	Auger M.; Morrow R.; Kestenare E.; Sallée J.-B.; Cowley R.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	Despite playing a major role in global ocean heat storage, the Southern Ocean remains the most sparsely measured region of the global ocean. Here, a unique 25-year temperature time-series of the upper 800 m, repeated several times a year across the Southern Ocean, allows us to document the long-term change within water-masses and how it compares to the interannual variability. Three regions stand out as having strong trends that dominate over interannual variability: warming of the subantarctic waters (0.29 ± 0.09 °C per decade); cooling of the near-surface subpolar waters (−0.07 ± 0.04 °C per decade); and warming of the subsurface subpolar deep waters (0.04 ± 0.01 °C per decade). Although this subsurface warming of subpolar deep waters is small, it is the most robust long-term trend of our section, being in a region with weak interannual variability. This robust warming is associated with a large shoaling of the maximum temperature core in the subpolar deep water (39 ± 09 m per decade), which has been significantly underestimated by a factor of 3 to 10 in past studies. We find temperature changes of comparable magnitude to those reported in Amundsen–Bellingshausen Seas, which calls for a reconsideration of current ocean changes with important consequences for our understanding of future Antarctic ice-sheet mass loss. © 2021, The Author(s).
语种	英语
scopus关键词	annual variation; cooling; deep water; global ocean; ice sheet; in situ measurement; long-term change; warming; water mass; Antarctica; Article; comparative study; ice sheet; ocean current; sea surface waters; Southern Ocean; temperature; time series analysis; trend study; warming; Southern Ocean
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250779
作者单位	Sorbonne Université, CNRS, LOCEAN, Paris, France; CNES, Toulouse, France; LEGOS, CNRS/IRD/CNES/University of Toulouse III, Toulouse, France; CSIRO Marine and Atmospheric Research, Hobart, TAS, Australia
推荐引用方式 GB/T 7714	Auger M.,Morrow R.,Kestenare E.,et al. Southern Ocean in-situ temperature trends over 25 years emerge from interannual variability[J],2021,12(1).
APA	Auger M.,Morrow R.,Kestenare E.,Sallée J.-B.,&Cowley R..(2021).Southern Ocean in-situ temperature trends over 25 years emerge from interannual variability.Nature Communications,12(1).
MLA	Auger M.,et al."Southern Ocean in-situ temperature trends over 25 years emerge from interannual variability".Nature Communications 12.1(2021).