March 12-13, 2018
Scripps Institution of Oceanography, La Jolla, CA USAIn March 2018, the SPURS-2 team met to collaboratively address science questions in several thematic science areas, including scales (e.g., large scale/seasonal, mesoscale/weekly, small scale/diurnal) and/or processes (e.g., air-sea interaction, upper ocean stratification, mixing). Presentations can also be accessed on the SPURS-2 website here.Agenda

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Farrar, T., Rainville, L., Plueddemann, A., Kessler, B., Lee, C., Hodges, B., Schmitt, R., Riser, S., Edson, J., Eriksen, C., and Fratantoni, D. [12-Mar-18]. The authors describe the SPURS-1 and SPURS-2 measurement programs, which included heavily instrumented air-sea interaction moorings and a dense array of measurements from moorings, Argo floats, gliders, and satellites. Li, Z., Li, P., and Bingham, F. [12-Mar-18]. This presentation examines how the ROM modeling and data assimilation system performs and what can be done with it. Soloviev, A.V., Dean, C.W., and McGauley, M. [12-Mar-18]. The authors examine the fine-scale features of freshwater lenses, concluding that freshwater lenses (1) appear to act as a barrier to oil slick propagation and (2) are localized in thin, near-surface layers, sometimes less than 1m deep. Numerical simulations of freshwater lenses using computational fluid dynamics (CFD) tools in the framework of the CARTHE/GoMRI project continues. Ho, D.T. [12-Mar-18]. Background, data, and observations of the effect of rain on air-sea CO₂ flux. Edson, J., Clayson, C.A., Farrar, T., Graham, R., and Paget, A. [12-Mar-18]. The status of research into the fate of fresh water (precipitation) in the Intertropical Convergence Zone (ITCZ) is summarized in this presentation, including meteorological and near-surface data collection on board the R/V Revelle in 2016/2017; deployment and recovery of the WHOI buoy with a DCFS and LI-7500 systems capable of measuring momentum, heat and mass fluxes; and future work. Thompson, E.J. [12-Mar-18]. Preliminary results from postdoc research into (1) near-surface density stratification by rain and diurnal warming; and (2) the potentially delayed and displaced mixing of freshwater into ocean mixed layering. Bingham, F., Li, Z., Tsontos, V., and Li, P. [12-Mar-18]. This presentation summarizes SPURS-2 Information System datasets and provides instructions for posting on the SPURS-2 website. Options are included for data archival (PO.DAAC, NODC, Geoscience Data Journal) in association with metadata, publications, presentations, and other applicable documentation. Drushka, K., Asher, B., Thompson, E., Jessup, A. and Iyer, S. [12-Mar-18]. In this presentation, the authors present current research into the impacts of small-scale forcing (rain, wind, wave) on the structure and evolution of the upper 5m of the ocean. Schanze, J.J., Springer, S.R., Lagerloef, G.S.E., and Thompson, E.J. [12-Mar-18]. In this presentation, the Salinity Snake is described along with early SPUR-2 results and a simple model. Hodges, B. [12-Mar-18]. The author describes sampling and performance of three wave gliders and presents statistics of the properties of freshwater puddles. Yang, J. and Riser, S.C. [12-Mar-18]. The authors compare rain amounts/rates and wind speed measurements collected from a central mooring and a Passive Aquatic Listener (PAL) on Argo floats. Hormann, V., Centurioni, L., Maximenko, N., and Chao, Y. [12-Mar-18]. The authors look at how drifters provide an expanding context to observations at the central mooring site. Sprintall, J. [12-Mar-18]. In this study, the author looks at (1) quantifying the vertical and horizontal structure of variable, large-scale upper ocean circulation and water masses in the SPURS-2 region and (2) determining what regional scale processes are responsible for the evolution and presence of upper ocean salinity stratification. Rainville, L. [12-Mar-18]. Since the first SPURS-2 cruise in June-July 2016, the Schooner Lady Amber has deployed 100 Surface Velocity Drifters and recovered, serviced, and redeployed several Wave Gliders, Seagliders, and Mixed Layer Lagrangian Floats. Two more cruises are scheduled in 2018 (March-April and May-June) with the potential for additional transit and deployments on the way to the South Pacific (or home) in June-July 2018. Riser, S.C. and Yang, J. [12-Mar-18]. A number of profiling floats deployed in SPURS-2 are equipped with PAL sensors capable of sensing wind and rainfall along the trajectories, and there is evidence of a strong seasonal rain signal that is roughly consistent with the variability in mixed-layer salinity. Further refinement and comparison with other SPURS-2 datasets is required in order to produce a complete picture of the large-scale upper ocean variability in the region on seasonal time scales.