Nutrient maximums related to low oxygen concentrations in the southern Canada Basin

	Nutrient maximums related to low oxygen concentrations in the southern Canada Basin
	Jin, MM ; Shi, JX ; Lu, Y ; Chen, JF ; Gao, GP ; Wu, JF ; Zhang, HS
刊名	ACTA OCEANOLOGICA SINICA
	2005
卷号	24 期号:6 页码:88-96
关键词	nutrients maximum regeneration mixture water mass Canada Basin
ISSN号	0253-505X
英文摘要	The phenomenon of nutrient maximums at 70-200 m occurred only in the region of the Canada Basin among the world oceans. The prevailing hypothesis was that the direct injection of the low-temperature high-nutrient brines from the Chukchi Sea shelf (<50 m) in winter provided the nutrient maximums. However, we found that there are five problems in the direct injection process, Formerly Jin et al. considered that the formation of nutrient maximums can be a process of locally long-term regeneration. Here we propose a regeneration-mixture process. Data of temperature, salinity, oxygen and nutrients were collected at three stations in the southern Canada Basin during the summer 1999 cruise. We identified the cores of the surface, near-surface, potential temperature maximum waters and Arctic Bottom Water by the diagrams and vertical profiles of salinity, potential temperature, oxygen and nutrients. The historical In data indicated that the surface and near-surface waters were Pacific-origin, but the waters below the potential temperature maximum core depth was Atlantic-origin. Along with the correlation of nutrient maximums and very low oxygen contents in the near-surface water, we hypothesize that, the putative organic matter was decomposed to inorganic nutrients; and the Pacific water was mixed with the Atlantic water in the transition zone. The idea of the regeneration-mixture process agrees with the historical observations of no apparent seasonal changes, the smooth nutrient profiles, the lowest saturation of CaCO3 above 400 m, low rate of CFC-11 ventilation and H-3-He-3 ages of 8 similar to 18 a around the nutrient maximum depths.
WOS关键词	ARCTIC-OCEAN ; WATER ; CIRCULATION ; PACIFIC ; SEA ; HALOCLINE ; ATLANTIC ; THERMOHALINE ; BUDGETS ; ORIGIN
WOS研究方向	Oceanography
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000234352600010
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/25031]
专题	自然资源部第一海洋研究所
通讯作者	Jin, MM
作者单位	1.State Ocean Adm, Lab Marine Biogeochem & Ecosyst, Hangzhou 310012, Peoples R China 2.State Ocean Adm, Lab Ocean Dynam Proc & Satellite Oceanog, Hangzhou 310012, Peoples R China 3.State Ocean Adm, Lab Marine Sci & Numer Modeling, Qingdao 266061, Peoples R China 4.Ocean Univ China, Coll Phys & Environm Oceanog, Qingdao 266003, Peoples R China 5.Univ Alaska Fairbanks, Int Arctic Res Ctr, Fairbanks, AK USA
推荐引用方式 GB/T 7714	Jin, MM,Shi, JX,Lu, Y,et al. Nutrient maximums related to low oxygen concentrations in the southern Canada Basin[J]. ACTA OCEANOLOGICA SINICA,2005,24(6):88-96.
APA	Jin, MM.,Shi, JX.,Lu, Y.,Chen, JF.,Gao, GP.,...&Zhang, HS.(2005).Nutrient maximums related to low oxygen concentrations in the southern Canada Basin.ACTA OCEANOLOGICA SINICA,24(6),88-96.
MLA	Jin, MM,et al."Nutrient maximums related to low oxygen concentrations in the southern Canada Basin".ACTA OCEANOLOGICA SINICA 24.6(2005):88-96.