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Evalua&onofAquariusV4.0,V4.5,V4.51SSSusingArgodata
TongLee
• FocusonthecomparisonofL3(EV)SCISMmonthlySSSproductswithArgomonthly,1ogriddedmaps(fromSIOandfromAPDRC).
• Timemeanvaluesaswellastemporalanomalies(total,seasonal,andnon-seasonal)
• DifferentspaLalscales(1ox1o,3ox3o,and10ox10o)
• ForglobalstaLsLcs,excluded2gridpointsintheSouthernOceanwithhugevaluesin10/2012inV4.5&V4.51(thereareotherbadvaluesoutsidetheArgodomainthatwerenotanalyzed)
Time-meanSSS(09/2011-05/2015)
V4.5hasoverallsmallerLme-meanregionalbiasesthanV4.0&V4.51
Zonallyaveraged&me-meanSSSanddifferencesfromArgo-SIO
• V4.5hastheleastLme-meanlaLtudinalbiasesoverall• V4.51mean–(+)biasesintropics(mid-laLtudes)morepronounced
Global(Argo-domain)averagesofSSS&differencesfromArgo
La&tude-&meplotsofzonallyaveragedSSSdiff.fromArgowith&memean
La&tude-&meplotsofzonallyaveragedSSSdifferencefromArgowithout&memean
V4.0generallyhasthesmallestseasonalanomalybiasesinNhighlaLtudes,givingrisetosmallestglobalseasonalSTD(nextslide)
1ox1
o
3ox3
o
10o x10
o
1ox1
o
3ox3
o
10o x10
o
1ox1
o
3ox3
o
10o x10
o
V4.0
V4.5
V4.51
V4.0
V4.5
V4.51
V4.0
V4.5
V4.51
V4.0
V4.5
V4.51
V4.0
V4.5
V4.51
V4.0
V4.5
V4.51
V4.0
V4.5
V4.51
V4.0
V4.5
V4.51
V4.0
V4.5
V4.51
ComparisonofV4.0,V4.5,V4.51STDw.r.t.toArgo-SIOonvariousspa&alscalesfortotal,seasonal,&non-seasonalanomalies
• OverallsimilarvaluesofglobalSTDvalues,esp.inlightoftheuncertainLesoftheArgoOIproducts.
• SeasonalbiasesV4.0<V4.5<V4.51
TemporalSTDw.r.tArgo-SIOandbetweenArgo-SIO&Argo-APDRCon1ox1oscale
• High-laLtudeSTDdominatedbyseasonal• V4.0be[erthanV4.5&V4.51inN.highlat.butslightlyworseinS.highlat(also
seeslide6),resulLnginsimilarglobalSTDsshowninthebarchart(slide7).
V4.0 V4.5
V4.51
TemporalSTDw.r.tArgo-SIOandbetweenArgo-SIO&Argo-APDRCon3ox3oscale
V4.0 V4.5
V4.51
• High-laLtudeSTDdominatedbyseasonal• V4.0be[erthanV4.5&V4.51inN.highlat.butslightlyworseinS.highlat(also
seeslide6),resulLnginsimilarglobalSTDsshowninthebarchart(slide7).
TemporalSTDw.r.tArgo-SIOandbetweenArgo-SIO&Argo-APDRCon10ox10oscale
V4.0 V4.5
V4.51
• High-laLtudeSTDdominatedbyseasonal• V4.0be[erthanV4.5&V4.51inN.highlat.butslightlyworseinS.highlat(also
seeslide6),resulLnginsimilarglobalSTDsshowninthebarchart(slide7).
• V4.5hasthesmallestLme-meanglobal,laLtudinal,andregionalbiases
• V4.0hasthesmallestseasonalanomalybiases,primarilydue
tonorthernhighlaLtudes• SimilarglobalSTDw.r.t.ArgoforV4.0,V4.5,andV4.51on
variousspaLalandtemporalscales
Summary
