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SWOT Science Team Meeting 2018 (Montreal, Canada)

26 June 2018

8:30-10:00 – Plenary (Chair: T. Pavelsky)

8:40 Program status (E. Lindstrom, S. Cherchali)
9:00 Project Status (P. Vaze, T. Lafon)
9:30 Update on Layover Results (T. Pavelsky, C. Chen)
9:45 Applications Working Group (M. Srinivasan, F. Hossain, E. Beighley, A. Andral)

10:30 – 12:30 Plenary (Chair: L.L. Fu)

10:30 Ocean Keynote Presentations:
- What spatial scales will SWOT resolve and their governing dynamics? A modeling study (J. Wang et al.)
- The status of tide modeling for SWOT (25 min) (R. Ray, F. Lyard)

11:20 Hydrology Keynote Presentations:
- Learning continental water fluxes from space - from hydrodynamic modeling to SWOT discharge products (M. Durand, P.-A. Garambois)
- Hydrologic Science and Applications from SWOT in Canada (D. Peters et al.)

12:10 Meeting objectives (Science Leads)

14:00-15:30 – Plenary (Chair: J.-F. Cretaux)

14:00 ADT presentation, current status and tentative schedule for next year (N. Picot, S. Desai).
- Science Data System Processing Overview (C. Chen, N. Steunou, R. Fjortoft)
- Algorithm Theoretical Basis Documents: Status, Plans, and Schedule (N. Picot, S. Desai)
- Ocean Product Status (N. Steunou, S. Desai)
- Hydrology Product Status (C. Pottier, J. Turk)
- Plans for SWOT Data Access at PO.DAAC/ At CNES (J. Hausmann, H. Vadon)
- Auxiliary and Ancillary Data and Models (N. Picot, S. Desai)

16:00-18:00 – Plenary (Chair: R. Morrow)

16:00 Short-latency products
- Status and expected performance  (N. Picot, S. Desai)

16:30 Sample Data Products Status & Plan (Chairs: N. Picot, S. Desai)
- Status of Hydrology Simulator (B. Williams)
- Pixel Cloud Products from Large Scale Simulator (D. Desroches)
- River Products from RiverObs (M. Durand)
- Lake Products from LOCNES (Lake Observation Cover aNd Extent from Swot) (C. Pottier)
- Ocean Products from simplified simulator (C. Ubelmann, L. Gaultier)

Hydrology Splinter

27 June 2017

 9:00-10:30 Hydrology cal/val (Chairs: T. Minear, S. Calmant)

- Summary of South America Water from Space Meeting (F. Papa)
- Current pre-launch and post-launch cal/val plans led by France (N. Picot)
- Current pre-launch and post-launch cal/val plans led by U.S. (T. Minear)
- Current pre-launch and post-launch cal/val plans led by Canada (D. Yang)

11:00-12:30 Pre-SWOT Hydrology Phenomenology and Science (Chairs: L. Smith, J.-F. Cretaux)

- Recent AirSWOT Results for lakes/wetlands (L. Pitcher)
- Recent AirSWOT Results for Rivers (E. Altenau)
- Preliminary Ka-band returns from the 2017 ABoVE Campaign (L. Smith, J. Fayne)
- Advances in understanding of SWOT phenomenology (C. Chen)

14:00-15:30 A Priori Datasets & Algorithms (Chairs: Y. Sheng, T. Pavelsky)

- A priori river dataset, updates and plans (T. Pavelsky, M. Durand)
- A priori lake datasets, updates and plans (C. Pottier) A priori lake datasets, updates and plans (Y. Sheng)
- Progress in lake water storage algorithms (M. Quellec, J.-F. Cretaux)
- River & lake ice flagging algorithms (T. Pavelsky)
- Water detection algorithms (D. Desroches)

16:00-17:30 Hydrology Data Products (Chairs: M. Durand, C. Pottier)

- Pixel Cloud Data product status (B. Williams, R. Fjortoft)
- Lake Data product status (C. Pottier)
- River Data product status (R. Frasson)
- Raster Data product status (T. Pavelsky)

28 June 2017

9:00-10:30 SWOT, Hydrological and Hydrodynamical Models, and Data Assimilation I (Chairs: C. David, A. Boone)

- Global flood wave travel times and SWOT data latency (G. Allen)
- Uncertainty Quantification for River Discharge and Data Assimilation (C. David)
- Discharge Interpolation & assimilation update (M. Pan)
- Assimilation of SWOT-like Data into ISBA-TRIP (C. Emery, S. Biancamaria)
- River discharge and bathymetry estimation from variational assimilation of SWOT altimetry observations (K. Larnier, J. Monnier, P.-A. Garambois)

11:00-12:30 SWOT, Hydrological and Hydrodynamical Models, and Data Assimilation II (Chairs: K. Andreadis, S. Biancamaria)

- Contribution of SWOT-like data to model lake/reservoirs in ORCHIDEE land surface model (C. Ottle, K. Petrus, A. Bernus, S. Biancamaria)
- Reduced model for sensitivity analysis and ensemble-based data assimilation with 1D and 2D hydraulic modeling (I. Mirouze, S. Ricci)
- Innovative methods development for the cycle-averaged lake product (Y. Sheng)
- Status of cycle-averaged river data products (K. Andreadis)

Ocean Splinter Working Groups

27 June 2018

9:00-12:30: Observation of SSH, currents at small mesoscales (Chairs: J. Wang and C. Ubelmann)

1.   SSH signal in relation to ocean currents and kinetic energy (spectrum perspective), altimeter + MITgcm 2km
9:00 On the Spectral Slope Discontinuity in Sea Surface Height Spectra (H. Torres Gutierrez et al.)
9:15 Evidence of Altimetric SSH slope changes potentially induced by IGW (O. Vergara et al.)
2.   Velocity measurements, ADCP, HF radar, how to connect to SSH?
9:30 Using harmonic analysis to detect non-stationary internal tides in the California Current System: Evaluating modulation resulting from the annual cycle in stratification (Kachelein, S. Gille)
9:45 High-wavenumber spectra from historical ADCP transits in the tropical Pacific (S. Gille et al.)
3. Glider studies, can we see anything about waves versus eddies?
10:00 S-ADCP, gliders, and thermosalinographs analysis in the tropics (G. Serazin et al.)
10:15 Internal waves and eddies from gliders (Drushka, Rainville)

4. Using mooring data to study the wavenumber spectra of SSH
11:00 Observation-based estimates of the SSH signature of the internal wave field (Samelson et al.)

5. Big field campaigns, what can we learn from these campaigns about the in-situ measurements in the context of SWOT?
11:15 DopplerScatt (T. Farrar; E. Rodriguez)
11:30 Broadband measurements of ocean surface topography using airborne lidar technology (L. Lenain, K. Melville)
11:45 Mediterranean Sea May 2018 campaign (F. d'Ovidio, A. Pascual)
12:00 The submesoscale mixed layer eddy experiment (SMILE), connection to SSH and SWOT (J. Girton)

14h-17:30: High-resolution modeling and SSH reconstruction

14:00-15:30 High-resolution ocean general circulation models (Chairs: P. Klein, B. Arbic, J. Le Sommer)
14:00 Perspectives on the wave-balanced motions interactions in high-resolution OGCM (a summary of the Portland workshop). (E. Zaron, C. Rocha)
14:12 Spatial and Temporal Variability of Coherent Structures in the North Atlantic in preparation for SWOT. Updates on the simulation plans with NEMO in Grenoble for 2018/2019 (J. Le Sommer and A. Ajayi)
14:24 Comparisons of global and regional internal wave simulations with observations and theory (B. Arbic)
14:36 Modulation of Lateral Transport Barriers by Submesoscale Eddies and Inertia Gravity Waves (A. Sinha, D. Balwada, N. Tarshish, R. Abernathey)
14:48 The JPL global simulation: last results and perspectives in in terms of balanced motions and internal gravity waves (H. Torres, P. Klein, Z. Su, D. Menemenlis)
15:00 Ocean mesoscale regime of the reduced-gravity quasi-geostrophic model. (R. Samelson et al.)

16:00-17:30 Reconstruction of SSH and the upper ocean circulation (Chairs: B. Qiu, G. Lapeyre, S. Gille)
16:00 Progress toward variational assimilation of SWOT data (P. Heimbach, B. Cornuelle, S. Gille, M. Mazloff, J. Wang)
16:12 An Observing System Simulation Experiment to evaluate the impact of SWOT in a regional data assimilation system (M. Benkiran, E. Rémy, P.-Y. Le Traon)
16:24 How reliable is the omega equation for reconstructing meso- and submeso-scale vertical velocities? A model evaluation for different flow regimes (F. d'Ovidio)
16:36 Balanced/unbalanced motion disentanglement: on the relevance of SST (A. Ponte)
16:48 Preliminary results on reconstructing upper ocean circulation variability in the presence of unbalanced motions (B. Qiu, S. Chen, J. Wang, P. Klein, L.-L. Fu)
17:00 Exploring de-noising and reconstruction methods for SWOT (L. Gomez-Navarro, R. Lguensat, J. Le Sommer, E. Cosme)

28 June 2018

9:00-10:30 Tides, internal tides, and internal gravity waves (Chairs: R. Ray, F. Lyard, B. Arbic)

9:00 HYCOM progress and plans related to SWOT (J. Shriver)
9:14 Non-stationarity in HYCOM internal tides (Nelson)
9:28 Dependence of simulated internal tides on surface tide models, topography, and stratification (S. Kelly)
9:42 Progress report on high-resolution empirical internal tide models (E. Zaron)
9:56 Non-hydrostatic tides and other considerations (F. Lyard)
10:10 Discussion of topics related to implementation of models by the SWOT project

11:00-12:30 Post-launch in-situ campaign (Chairs: T. Farrar et al)

11:00 Overview of session goals (T. Farrar, L.-L. Fu, R. Morrow)
11:05 Science objectives of Adopt-a-crossover effort (F. D’Ovidio)
11:20 Notional SWOT international science campaign (T. Farrar)
11:35 Programmatic approach and schedules (E. Lindstrom, N. Vinogradova-Shiffer)

28 June 2018

14:00-15:30 Plenary (Chair: T. Pavelsky)

14:00-15:30 Coastal/estuarine group (B. Laignel, M. Simard, P. Matte)

14:00 Simulation and reconstruction of the coastal current off East Canada (G. Han)
14:10 Hydrodynamic modeling in the Gironde estuary and over the shelf of the Bay of Biscay and of the Gulf of Tonkin (N. Ayoub)
14:20 A spectral approach for investigating the spatio-temporal hydrodynamic variability and the simulator SWOT data in estuarine and coastal zones (I. Turki, B. Laignel)
14:35 Water surface slope variability in deltaic regions: experimental results from airborne campaigns in the Atchafalaya Basin (M. Simard)
14:45 Mapping tides from SWOT data: An assessment of regularized and constrained harmonic analysis in the St. Lawrence Estuary (P. Matte)
14:55 Will SWOT cover critical deltas and estuarine regions (M. Simard)

16:00 – 17:00 Plenary (Chair: L.-L. Fu)

16:00 Splinter session summaries and main results
16:00 Hydrology sessions:
- Hydrology cal/val
- Pre-SWOT Hydrology Phenomenology and Science
- A Priori Datasets & Algorithms
- Hydrology Data Products
- SWOT, Models, and Data Assimilation
16:25 Oceanography sessions:
- Observation of SSH, currents at small mesoscales
- High-resolution ocean general circulation models
- Reconstruction of SSH and the upper ocean circulation
- Tides, internal tides, and internal gravity waves
- Post-launch in-situ campaign
16:50 Meeting wrap-up (Science Leads)

29 June 2018

SWOT Hydrology Discharge Product Development Meeting

9:00-10:30 Introduction and Poster Session

- Agenda and goals (M. Durand)
- Flash talks: Short one or two-slide versions of posters

11:00-12:30 Background, McFLI and Introduction to Pepsi Challenge

- Discharge data products and SWOT Mission Operations (M. Durand)
- On the need for discharge integrators (C. Gleason)
- A perspective from global modeling (A. Boone)
- Variational data assimilation: Latest SiC results and potential global applicability (P.-O. Malaterre)

14:00-15:30 Pepsi Challenge 2 Investigations

Unpacking Pepsi Challenge 2.0 Results. Each group present their own results

- Intercomparison of discharge estimation methods From synthetic river surface observations from space (SWOT-like data) (P.-A.Garambois, K. Larnier, M. Durand)
- SIC4DVar results on Pepsi 2 challenge (H. Oubanas, I. Gejadze, F. Billaud, P.-O. Malaterre)
- The Pepsi 2 datasets (R. Frasson)
- MetroMan preliminary Pepsi2 results (S. Tuozzolo, R. Frasson, M. Durand)

16:00 Next Steps and Decision Making

Each speaker tasked with proposing one slide, presenting for only a few minutes, and encouraging discussion.
- Pepsi Challenge: What comes next? (M. Durand)
- Next steps for McFLI. (M. Hagemann)
- Data Products: What comes next? (R. Frasson)
- Next steps for variational assimilation for DassFlow hierarchical (P.-A. Garambois)
- Next steps for variational assimilation for SiC (H. Oubanas)
- Next steps for developing the SWOT consensus algorithm (R. Frasson)
- Next steps for integrators (C. Gleason)

29 June 2018

SWOT Ocean Cal/Val Splinter

8:30 Introduction (C. Chen, N. Picot)

- overall calval objectives and meeting objectives
- status of the calval plan and RFAs

9:00-10:30 Status of the in-situ calval plan (L.L. Fu, Y. Chao, S. Desai)

- Introduction (L.-L. Fu)
- Status, results, and plans for development of GPS buoys: Potential for SWOT insitu calval (S. Desai)
- The Monterey Bay Experiment results: Mooring/glider dynamic height, and comparison with GPS SSH - bottom pressure (Y. Chao)
- The California site pre-launch experiment Plan (Y. Chao)
- Scenarios of the post-launch campaign (L.-L. Fu)

11:00 Status of US lidar calval (K. Melville, L. Lenain)

- Pre-launch plan and aircraft selection status
- Post-launch plan

11:30 Status of French lidar calval

12:00 Discussion of the synergy of the GPS buoy array, hydrograhic array, and lidar flights and the way forward (L.-L. Fu)

Fast-sampling phase calval plans at other sites

14:00 Bass Strait absolute SSH CalVal site  (B. Legresy)
14:15-15:30 Adopt a crossover
- Validation objectives and organisation (F. D’Ovidio, R. Morrow)
- Tropical site (SW Pacific) (F. Marin)
- High latitude site (ACC south of Australia) (B. Legresys)
- W. Pacific proposed Chinese international site (Yi Chao)
- Overview of other opportunities – 2-3 slide each (R. Morrow): California, Mid-Atlantic Bight/Gulf Stream, Brazil/Amazon, Labrador Sea, Agulhas, …

16:00 Additional products for Fast Sampling Phase CalVal sites (C. Ubelmann)

for accurate local altimetric SSH - HR tides and internal tides, HR MSS, waves, colocated alongtrack altimetry, HR mapped SSH & FSLEs, HR SST/ocean colour, SAR

16:15 Global statistical calval
- SWOT nadir altimeter and KaRIN cross-calibrations (J. Wang, L.-L. Fu)
- Synergy with the conventional altimeter constellations (G. Dibarboure et al)

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