Poleward shift in ventilation of the North Atlantic subtropical underwater
MetadataShow full item record
KeywordNorth Atlantic salinity maximum; Subtropical underwater; Poleward expansion; Ventilation; Decadal variability
We report the findings that the sea surface salinity maximum (SSS-max) in the North Atlantic has poleward expanded in recent decades and that the expansion is a main driver of the decadal changes in subtropical underwater (STUW). We present observational evidence that the STUW ventilation zone (marked by the location of the 36.7 isohaline) has been displaced northward by1.2 ± 0.36° latitude for the 34 year (1979–2012) period. As a result of the redistribution of the SSS-max water, the ventilation zone has shifted northward and expanded westward into the Sargasso Sea. The ventilation rate of STUW has increased, which is attributed to the increased lateral induction of the sloping mixed layer. STUW has become broader, deeper, and saltier, and the changes are most pronounced on the northern and western edges of the high-saline core.
Author Posting. © American Geophysical Union, 2018. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 45 (2018): 258–266, doi:10.1002/2017GL075772.
Suggested CitationArticle: Yu, Lisan, Jin, Xiangze, Liu, Hao, "Poleward shift in ventilation of the North Atlantic subtropical underwater", Geophysical Research Letters 45 (2018): 258–266, DOI:10.1002/2017GL075772, https://hdl.handle.net/1912/9547
Showing items related by title, author, creator and subject.
Goodkin, Nathalie F.; Druffel, Ellen R. M.; Hughen, Konrad A.; Doney, Scott C. (Nature Publishing Group, 2012-05-01)Ventilation and mixing of oceanic gyres is important to ocean-atmosphere heat and gas transfer, and to mid-latitude nutrient supply. The rates of mode water formation are believed to impact climate and carbon exchange ...
Cellular elemental content of individual phytoplankton cells collected during US GEOTRACES North Atlantic Transect cruises in the Subtropical western and eastern North Atlantic Ocean during Oct and Nov, 2010 and Nov. 2011. Twining, Benjamin S. (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: firstname.lastname@example.org, 2017-06-21)Phytoplankton contribute significantly to global C cycling and serve as the base of ocean food webs. Phytoplankton require trace metals for growth and also mediate the vertical distributions of many metals in the ocean. ...
Doney, Scott C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1991-08)The oceanic distributions of tritium 3H), 3He, and the chlorofluorocarbons (CFCs) can be used to constrain the time-scales of the major ventilation pathways for an ocean basin such as the North Atlantic. I present a new ...