FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4210888926> ?p ?o ?g. }

• W4210888926 endingPage "741" @default.
• W4210888926 startingPage "715" @default.
• W4210888926 abstract "Abstract. The production and removal of ammonium (NH4+) are essential upper-ocean nitrogen cycle pathways, yet in the Southern Ocean where NH4+ has been observed to accumulate in surface waters, its mixed-layer cycling remains poorly understood. For surface seawater samples collected between Cape Town and the Marginal Ice Zone in winter 2017, we found that NH4+ concentrations were 5-fold higher than is typical for summer and lower north than south of the Subantarctic Front (0.01–0.26 µM versus 0.19–0.70 µM). Our observations confirm that NH4+ accumulates in the Southern Ocean's winter mixed layer, particularly in polar waters. NH4+ assimilation rates were highest near the Polar Front (12.9 ± 0.4 nM d−1) and in the Subantarctic Zone (10.0 ± 1.5 nM d−1), decreasing towards the Marginal Ice Zone (3.0 ± 0.8 nM d−1) despite the high ambient NH4+ concentrations in these southernmost waters, likely due to the low temperatures and limited light availability. By contrast, rates of NH4+ oxidation were higher south than north of the Polar Front (16.0 ± 0.8 versus 11.1 ± 0.5 nM d−1), perhaps due to the lower-light and higher-iron conditions characteristic of polar waters. NH4+ concentrations were also measured along five transects of the Southern Ocean (Subtropical Zone to Marginal Ice Zone) spanning the 2018/19 annual cycle. These measurements reveal that mixed-layer NH4+ accumulation south of the Subantarctic Front derives from sustained heterotrophic NH4+ production in late summer through winter that, in net, outpaces NH4+ removal by temperature-, light-, and iron-limited microorganisms. Our observations thus imply that the Southern Ocean becomes a biological source of CO2 to the atmosphere in autumn and winter not only because nitrate drawdown is weak but also because the ambient conditions favour net heterotrophy and NH4+ accumulation." @default.
• W4210888926 created "2022-02-09" @default.
• W4210888926 creator A5005194840 @default.
• W4210888926 creator A5005379708 @default.
• W4210888926 creator A5007853594 @default.
• W4210888926 creator A5009123298 @default.
• W4210888926 creator A5023668367 @default.
• W4210888926 creator A5026224344 @default.
• W4210888926 creator A5026726737 @default.
• W4210888926 creator A5053407273 @default.
• W4210888926 creator A5060713983 @default.
• W4210888926 date "2022-02-07" @default.
• W4210888926 modified "2023-10-14" @default.
• W4210888926 title "Biogeochemical controls on ammonium accumulation in the surface layer of the Southern Ocean" @default.
• W4210888926 cites W117227447 @default.
• W4210888926 cites W1486479717 @default.
• W4210888926 cites W1502045764 @default.
• W4210888926 cites W1512686196 @default.
• W4210888926 cites W1541567252 @default.
• W4210888926 cites W1594069438 @default.
• W4210888926 cites W1594282911 @default.
• W4210888926 cites W1597284321 @default.
• W4210888926 cites W1652686173 @default.
• W4210888926 cites W1663450192 @default.
• W4210888926 cites W1681890218 @default.
• W4210888926 cites W176575622 @default.
• W4210888926 cites W1924987555 @default.
• W4210888926 cites W1940160311 @default.
• W4210888926 cites W1963704488 @default.
• W4210888926 cites W1967107775 @default.
• W4210888926 cites W1967355403 @default.
• W4210888926 cites W1969036281 @default.
• W4210888926 cites W1970136052 @default.
• W4210888926 cites W1971217334 @default.
• W4210888926 cites W1971428624 @default.
• W4210888926 cites W1973259369 @default.
• W4210888926 cites W1973498207 @default.
• W4210888926 cites W1974010481 @default.
• W4210888926 cites W1974100825 @default.
• W4210888926 cites W1976160439 @default.
• W4210888926 cites W1976477435 @default.
• W4210888926 cites W1976523992 @default.
• W4210888926 cites W1976896056 @default.
• W4210888926 cites W1977642004 @default.
• W4210888926 cites W1979437158 @default.
• W4210888926 cites W1980003023 @default.
• W4210888926 cites W1982897753 @default.
• W4210888926 cites W1985241440 @default.
• W4210888926 cites W1986270711 @default.
• W4210888926 cites W1989042161 @default.
• W4210888926 cites W1989990505 @default.
• W4210888926 cites W1992063676 @default.
• W4210888926 cites W1992224726 @default.
• W4210888926 cites W1994684165 @default.
• W4210888926 cites W1995319733 @default.
• W4210888926 cites W1995809204 @default.
• W4210888926 cites W1995922746 @default.
• W4210888926 cites W2000240491 @default.
• W4210888926 cites W2001318539 @default.
• W4210888926 cites W2001668106 @default.
• W4210888926 cites W2003850870 @default.
• W4210888926 cites W2004359105 @default.
• W4210888926 cites W2005689371 @default.
• W4210888926 cites W2006944472 @default.
• W4210888926 cites W2010514110 @default.
• W4210888926 cites W2013045497 @default.
• W4210888926 cites W2016417694 @default.
• W4210888926 cites W2019721277 @default.
• W4210888926 cites W2022693786 @default.
• W4210888926 cites W2023168353 @default.
• W4210888926 cites W2025371478 @default.
• W4210888926 cites W2028075627 @default.
• W4210888926 cites W2028499348 @default.
• W4210888926 cites W2030324234 @default.
• W4210888926 cites W2030335577 @default.
• W4210888926 cites W2031252867 @default.
• W4210888926 cites W2033301037 @default.
• W4210888926 cites W2034527176 @default.
• W4210888926 cites W2034971411 @default.
• W4210888926 cites W2036220926 @default.
• W4210888926 cites W2038833563 @default.
• W4210888926 cites W2043065331 @default.
• W4210888926 cites W2047572519 @default.
• W4210888926 cites W2048342577 @default.
• W4210888926 cites W2049587947 @default.
• W4210888926 cites W2050984558 @default.
• W4210888926 cites W2051494658 @default.
• W4210888926 cites W2051516089 @default.
• W4210888926 cites W2053371392 @default.
• W4210888926 cites W2053549886 @default.
• W4210888926 cites W2054933643 @default.
• W4210888926 cites W2056400300 @default.
• W4210888926 cites W2057037894 @default.
• W4210888926 cites W2057068687 @default.
• W4210888926 cites W2057550209 @default.
• W4210888926 cites W2060988280 @default.
• W4210888926 cites W2061945692 @default.
• W4210888926 cites W2062967234 @default.

• next