Validation of 400+ SARAL (ICE-1) water level series over rivers

Joécila Santos da Silva (UEA, Brazil)

CoAuthors

Daniel Medeiros Moreira (CPRM, BRAZIL); Taina Conchy (UEA, BRAZIL); Stéphane Calmant (IRD, FRANCE); Adrien Paris (CLS, FRANCE)

Event: 2018 Ocean Surface Topography Science Team Meeting

Session: Instrument Processing: Measurement and Retracking

Presentation type: Type Poster

Because 1- SARAL only flew for 3 years on its nominal -repeat- orbit, and 2- the gap with ENVISAT makes it diffcult to append the SARAL series with the ENVISAT ones, it has been little used today to complement the historical ERS-2 - ENVISAT water level series over rivers. We have processed the SARAL measurements (ICE-1 ranges) over the Amazon and Congo basins to produce more than 400 time series over a large variety of rivers, in particular in terms of reach width. In the Amazon basin we compare these series with gauge series. In both basins, we take advantage of the crossings at 1.5 day intervals to perform a SARAl-SARAL comparison, same as the one first presented for ENVISAT in Silva et al. (RSE, 2010). Last, taking advantage of the absolute levelling of 40 gauges that we performed by GPS in the Amazon basin, we propose updated values for the absolute biais of SARAL-ICE1 measurements and the relative bias between SARAL and ENVISAT (ICE-1 ranges for both).
 

Poster show times:

Room Start Date End Date
Foyer, Salao Nobre & tent Thu, Sep 27 2018,18:00 Thu, Sep 27 2018,20:00
Foyer, Salao Nobre & tent Fri, Sep 28 2018,14:00 Fri, Sep 28 2018,15:00
Joécila Santos da Silva
UEA
Brazil
joecila@yahoo.fr