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Table 1 Simulated increase of integrated nitrate concentration upper 100 m by pass of cyclonic eddy with SSHA < − 50 cm (ΔintN(eddy)) and annual ΔintN(eddy)intAN(eddy)) between 2000 and 2012. ΔintAN(eddy) without winter cooling mixing period (WCM) data are also shown. “0” of S/N denotes that no eddy passed over KEO in respective years

From: Impact of cyclonic eddies and typhoons on biogeochemistry in the oligotrophic ocean based on biogeochemical/physical/meteorological time-series at station KEO

Year S/N Period with SSHA < − 50 cm ΔintN(eddy)
(mol-N m−2)
ΔintAN(eddy)
(mol-N m−2 year−1)
ΔintAN(eddy)
(mol-N m−2 year−1) without WCM data
2000 0   0.00 0.00 0.00
2001 1 11 May–30 May 0.22 0.32 0.32
2a 3 October–11 October 0.08   
3a 10 October–2 November 0.02   
2002 1 31 March–26 Aprilb 0.68 0.68 0.00
2003 1a 1 October–12 October 0.10 0.10 0.10
2004 0   0.00 0.00 0.00
2005 0   0.00 0.00 0.00
2006 1 7 April–25 April 0.36 0.99 0.99
2 28 April–11 May 0.63   
2007 1 18 January–26 Januaryb 0.16 0.27 0.12
2a 16 May–16 May 0.12   
2008 1 16 April–23 May 0.10 0.34 0.34
2 16 December–21 December 0.24   
2009 1 8 January–30 Januarya 0.33 0.33 0.00
2010 1 20 June–16 July 0.65 0.65 0.65
2011 1a 13 March–13 Marchb 0.06 0.44 0.38
2 9 July–26 August    
2012 1 4 October–31 October 1.07 1.07 1.07
    Average of ΔintAN(eddy) 0.40 0.31
standard deviation 0.36 0.38
  1. aCyclonic eddy with SSHA of about − 50 cm
  2. bThis period is in the deep winter mixing (DWM) period