rain at aq freshening / surface splash
DESCRIPTION
Stratification in the Tropics: AQ – ARGO –HYCOM – PMEL T. Meissner, F. Wentz, K, Hilburn, J. Scott, RSS. dry fresh bias ≈ - 0.1 psu. AQ – HYCOM (≈ 5 m) AQ – ARGO (5 m) AQ – PMEL (1 m). AQ dry Dry < 1 hour before AQ Rain 1 – 12 hours before AQ 1 m layer has mixed - 0.1 psu fresh surface. - PowerPoint PPT PresentationTRANSCRIPT
Stratification in the Tropics: AQ – ARGO –HYCOM – PMELT. Meissner, F. Wentz, K, Hilburn, J. Scott, RSS
Rain at AQFreshening / surface splash
AQ dryRain < 1 hour before AQ
Freshwater lensingin 5 m layer: up to – 0.4 psu
AQ dryDry < 1 hour before AQ
Rain 1 – 12 hours before AQ1. 1 m layer has mixed2. - 0.1 psu fresh surface
HYCOM largely proxy to ARGO
dry fresh bias≈ - 0.1 psu
AQ – HYCOM (≈ 5 m) AQ – ARGO (5 m) AQ – PMEL (1 m)
MWR (CONAE, K/Ka-band)Rain at tine and location of
AQ observation
SSMIS F17 / WindSatWithin 1 hour of AQ
TMIvarying time window
monthly 150 km average Bias / Standard Deviation [psu]
AQ – ARGO AQ – PMEL AQ - HYCOM PMEL - ARGO- 0.148 / 0.251 - 0.106 / 0.250 - 0.125 / 0.227 - 0.043 / 0.304
Aquarius meets 0.2 psu RMS accuracy requirement in tropics [15S, 15 N] with a potential small bias ( - 0.1 psu)
Triple Collocation of AQ – ARGO – PMEL
SSS AQUARIUS PMEL ARGO
σ [psu] 0.128 0.215 0.216
AQ – PMEL AQ – ARGO AQ – HYCOM
salty HYCOM biasIn fresh water outliers