| 3 | | = '''SLOCET''' = |
| 4 | | ||Infrastructure||CNRS_Coriolis |
| 5 | | ||Project (long title)||Shelf sLOpe impact on Coastal Eddy Turbulence|| |
| 6 | | ||Campaign Title (name data folder)||17SLOCET|| |
| 7 | | ||Lead Author||Alex Stegner|| |
| 8 | | ||Contributors||Remi Laxenaire, Ted Johnson, Chunxin Yuan, Joel Sommeria, Samuel Viboud|| |
| 9 | | ||Date Campaign Start||13/02/2017|| |
| 10 | | ||Date Campaign End||10/03/2017|| |
| | 3 | = '''ICESHELF''' = |
| | 4 | ||Infrastructure||CNRS_Coriolis Topographic Barriers and warm Ocean currents controlling Antarctic ice shelf melt|| |
| | 5 | ||Project (long title)||Topographic Barriers and warm Ocean currents controlling Antarctic ice shelf melt|| |
| | 6 | ||Campaign Title (name data folder)||17ICESHELF|| |
| | 7 | ||Lead Author||Elin Darelius (part I) and Anna Wåhlin (part II)|| |
| | 8 | ||Contributors||Nadine Steiger, Joel Sommeria, Samuel Viboud|| |
| | 9 | ||Date Campaign Start||04/09/2017|| |
| | 10 | ||Date Campaign End||27/09/2017|| |
| 18 | | In order to mimic the oceanic stratification a two layer salt stratification with a thin upper layer ( H1= 8cm) above a deep layer ( H2=72cm) is set up on the rotating platform.The ration period is fixed at To=50s (i.e. a Coriolis parameter f=4*pi/T0=0.25s-1) and adjusting the density difference rho2-rho1=10 g/l between the two layers give baroclinic deformation radius Rd around 32cm. This deformation radius will be large in comparison with the upper layer thickness ( Rd>H1) but remain small in comparison with the tank diameter D=13m. Hence, for eddies in the upper layer, we will satisfy the shallow water aspect ratio (H1/Reddy<<1) at mesoscale when the typical radius is of the same size or larger than Rd. |
| 19 | | |
| 20 | | == 2.2 Wave maker == |
| 21 | | == 2.3 Jet forcing == |
| 22 | | == 2.4 References axis along the wall (horizontal and vertical) == |
| 23 | | By definition we will use Ox and Oy axis to define the along shore and the cross shore axis. The central reference point (0,0) along the wall is chosen to be the closest point to the center of the tank (also labeled '''M0'''). Positive direction corresponds to the mean wave or the mean flow direction. We use seven references points along the wall to quantify the impact of the free surface deformation and the possible vertical deviation of the laser sheet. |
| | 18 | The two Barriers - the shelf break and the ice shelf front - will be studied in two separate sets of Experiments. |
| | 19 | |
| | 20 | Part I: Divergent isobaths at the shelf break |
| | 21 | |
| | 22 | An idealized topography representing a widening continental shelf and a trough crosscutting the Continental shelf break is used and the effect of changing 1) water depth 2) radius of curvature and 3) flow speed will be explored. The experiments will be repeated with a) a barotropic and b) a baroclinic current. |
| | 23 | |
| | 24 | Part II: Flow across an ice shelf front |
| | 25 | |
| | 26 | == 2.2 Topography == |
| | 27 | === 2.2.1 Topography for the shelf break experiments (Nadine) === |
| | 28 | * Check and add the location of the wall/sink! |
| | 29 | |
| | 30 | === 2.2.2 Topography for the ice shelf experiments === |
| | 31 | == 2.3 Reference axis == |
| | 32 | === 2.3.1 Reference axis for shelf break experiments (Nadine) === |
| | 33 | By definition we will use Ox and Oy axis to define the along slope and the cross slope axis. The central reference point (0,0) along the slope is chosen to be the first "land" corner downstream of the source. Positive u - direction corresponds to the along slope flow direction, while positive v - direction is directed onshelf. |
| | 34 | |
| | 35 | 2.3.2 Reference axis for ice front experiments |
| | 36 | |
| | 37 | 2.4 References axis along the wall (horizontal and vertical) |
| | 38 | |
| | 39 | By definition we will use Ox and Oy axis to define the along shore and the cross shore axis. The central reference point (0,0) along the wall is chosen to be the closest point to the center of the tank (also labeled '''M0'''). Positive direction corresponds to the mean wave or the mean flow direction. |
| | 40 | |
| | 41 | __We use seven references points along the wall to quantify the impact of the free surface deformation and the possible vertical deviation of the laser sheet???__ |
| 45 | | ||$Htot$||Total water depth||$cm$||80||estimated at the center of the wall|| |
| 46 | | ||$Hcoast$||Water depth at coast (at M0)||$cm$||20||estimated at the center of the wall|| |
| 47 | | ||$W_1$||Downstream shelf width||$m$||0-1-4|||| |
| 48 | | ||$S_1$||Downstream shelf slope||$%$||0-15-60|||| |
| 49 | | ||$T_{flap}$||Flap period||$s$||40-200|||| |
| 50 | | ||$A_{flap}$||Amplitude of carriage motion||$cm$||10-60||peak to peak amplitude|| |
| 51 | | ||$V_{flap}$||Max speed of oscillating carriage||$cm/s$||1-4|||| |
| 52 | | ||$Q_{jet}$||Flow rate of the jet||$l/min$||0.5-4|||| |
| | 63 | ||$Htot$||Total water depth||$cm$||60 - 70||estimated where?|| |
| | 64 | ||$Hcoast$||Depth on shelf||$cm$||10 - 20||estimated where?|| |
| | 65 | ||$R_c$||Radius of curvature||$m$||0 - 0.5|||| |
| | 66 | ||$Q$||Flux||$L min-1$||20 - ??- ?? - 135|||| |
| | 67 | ||$\Delta \rho$||Density difference (ambient - inflow)||$kg$||0 - 3 - 10|||| |
