Initial comparisons of Jason-3 and Sentinel-3A and tide gauges

Eric Leuliette (NOAA Laboratory for Satellite Altimetry, United States)

CoAuthors

Amanda Plagge (NOAA Laboratory for Satellite Altimetry, United States)

Event: 2016 Ocean Surface Topography Science Team Meeting

Session: Regional and Global CAL/VAL for Assembling a Climate Data Record

Presentation type: Type Oral

With the operational onset of Jason-3 and Sentinel-3 missions, the determination of mission-specific altimeter bias drift via the global tide gauge network is more crucial than ever. Here we extend previously presented work comparing the effect of vertical land motion (VLM) at tide gauges on derived drift for the combined TOPEX/Jason-1/Jason-2 dataset with the addition of Jason-3, and the combined Envisat/AltiKa record, as well as Sentinel-3 as data become available. Estimated drifts for each mission are considered using seven VLM estimations: (1) GPS-based methodology by King et al., 2012 [updated] at University of Tasmania; (2) GPS time series produced by JPL (http://sideshow.jpl.nasa.gov/post/series.html); the Université de La Rochelle’s (3) ULR5 (Santamaria-Gomez 2012) and (4) ULR6; (5) GPS time series produced at the Nevada Geodetic Laboratory, and two versions using glacial isostatic adjustment: (6) those by Peltier et al. (2015) and (7) those by A, Wahr, and Zhong (2013). The drift estimates from the combined TOPEX/Jason dataset vary by ~0.7 mm/year depending on the VLM estimate. The combined Envisat/AltiKa estimated drifts vary slightly less, more on the order of 0.5 mm/yr. In addition, we demonstrate the sensitivity of the drift estimates to tide gauge selection.
 

Oral presentation show times:

RoomStart DateEnd Date
Auditorium Wed, Nov 02 2016,15:30 Wed, Nov 02 2016,15:45
Eric Leuliette
NOAA Laboratory for Satellite Altimetry
United States
Eric.Leuliette@noaa.gov