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Temperature, salinity, dissolved oxygen, and O₂ saturation (when present). Vertically interpolated to regular pressure grid • 20 discrete colour levels.
Left: log₁₀(count+1) per T-S bin. Right (when O₂ present): median O₂ saturation per T-S bin — bins with <5 samples masked. Colour scale: BrBG (brown=low, teal=high).
East, north, and up velocity. QC-flagged samples excluded before interpolation. Shared symmetric Spectral_r colormap for east/north; separate bounds for up. No temporal gap fill — NaN where no data.
Velocity IQR profiles. Median (solid line) and interquartile range (shaded, 25–75 %) across the full deployment at each pressure level. 2.5–97.5 % outer envelope for speed. Right panel: count of non-NaN values per depth.
Velocity time series at depth of maximum mean speed. Depth chosen as the pressure level with the highest time-mean current speed. Speed, east, and north velocity at that level.
Current roses. One rose per pressure level (up to 12, evenly subsampled). Suspect/bad QC excluded. Each petal shows the fraction of time current flowed in that direction; petal length encodes speed (m/s).
Hodograph. Current hodographs at two pressure levels (25th and 75th percentile of the valid range). Top row = shallower level; bottom row = deeper level. Left = Tukey-smoothed raw; right = eddy component (LP mean removed). Colour indicates fractional time through the deployment (lime circle = start, red square = end). QC-bad data excluded.
Particle trajectory. Pseudo-Lagrangian trajectories at each gridded pressure level, integrated from east and north velocity (Euler forward). All start at the origin. Coloured by pressure (dbar).
Potential density. 20 discrete colour levels.
Buoyancy frequency squared (N²). log₁₀(N²) in s⁻². Purple = strongly stratified; yellow = weakly stratified. Computed from T and S via GSW.
Isopycnal coverage diagnostic. Percentage of time steps during which each σ₀ surface (0.1 kg/m³ spacing) lies within the measured column range. Green ≥ 80 %; amber 50–80 %; red < 50 %. Orange diamond = current --sig-level target. Dashed line = 80 % threshold. NaN gaps in the tracking figure above correspond to times when the isopycnal is outside the measured range (pycnocline above the shallowest grid level, or below the deepest).
Isopycnal height above seabed — sigma0. Height above seabed (m) of each target σ₀ surface through time. Tracked by linear interpolation in density space from the gridded sigma0 field; 1-hour running median applied. NaN where the surface outcrops or is outside the observed range. Light blue = lighter water (shallower); dark blue = denser water (deeper). Targets set by --sig-level (default σ₀ = 27.70).
Temperature ~100 m above seabed. 1-hour running median temperature at the grid pressure level nearest to 100 m above the seabed. Level and height-above-seabed shown in figure title.
Temperature power spectrum. Left: low-frequency overview — 14-day Hann windows, 50 % overlap. Right: high-frequency zoom — 1-day windows (~14× more windows, smoother tidal/inertial estimate); x-axis in hours. LF markers: M2, 1.8 d, 4 d, f. HF markers: M2 (12.4 h), f (inertial). Dashed black line: −2 spectral slope. Colour encodes pressure (light blue = shallow, dark blue = deep). Window length controllable via hf_segment_days in _make_spectrum_fig_b64.
Temperature wavelet scalogram. Continuous wavelet transform (Morlet, ω₀ = 6; Torrence & Compo 1998). Three depth levels: 2nd from top, middle, 2nd from bottom of the 100-dbar-multiple valid levels. Colour shows log₁₀(power) (°C² d); hatched grey region = cone of influence (edge-affected); hatched cross region = gap-filled data; black contour = 95 % significance against red noise.
Rotary velocity spectrum. CW (clockwise, anticyclonic, solid red lines) and CCW (counter-clockwise, cyclonic, dashed blue lines) power spectra and rotary coefficient r = (CCW−CW)/(CCW+CW). Welch PSD, Hann window, 14-day segments, 50 % overlap. Up to 4 pressure levels (at most 1/5th of valid levels); colour encodes pressure depth. Vertical lines: M2, K1, 1.8 d, 4 d, and inertial period (f). r > 0 = CCW dominant; r < 0 = CW dominant. Physical interpretation (NH): inertial oscillations are inherently CW; for internal waves (f < ω), CW dominance indicates upward energy propagation / downward phase propagation (Leaman & Sanford 1975).
| Variable | Type | Units | Standard / long name | Min / Max | N (valid) | Attributes | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| pressure | float64 | dbar | sea_water_pressure sea water pressure |
80 / 820 | 38 | 2 attrs
|
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| time | datetime64[ns] | time time |
2026-07-11 20:30 / 2026-07-25 11:44 | 19,635 | 1 attr
|
| Variable | Type | Units | Standard / long name | Min / Max | N (valid) | Attributes | ||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| conductivity | float32 | mS cm-1 | sea_water_electrical_conductivity Conductivity |
29.21 / 36.34 | 746,130 (564,149) | 9 attrs
|
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| current_direction | float32 | degrees | direction_of_sea_water_velocity Current direction (0=N, clockwise) |
0.6297 / 359.3 | 746,130 (520,672) | 1 attr
|
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| current_speed | float32 | m s-1 | sea_water_speed Horizontal current speed |
0.006549 / 1.076 | 746,130 (520,672) | 1 attr
|
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| east_velocity | float32 | m s-1 | eastward_sea_water_velocity Eastward sea water velocity |
-0.9994 / 0.9647 | 746,130 (520,672) | 1 attr
|
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| north_velocity | float32 | m s-1 | northward_sea_water_velocity Northward sea water velocity |
-0.9928 / 0.9071 | 746,130 (520,672) | 1 attr
|
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| salinity | float32 | 1 | sea_water_practical_salinity Practical Salinity |
34.04 / 35.68 | 746,130 (564,144) | 3 attrs
|
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| sigma0 | float32 | kg m-3 | sea_water_sigma_t Potential density anomaly referenced to surface (sigma-0) |
27.14 / 28.31 | 746,130 (564,144) | 2 attrs
|
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| temperature | float32 | degree_Celsius | sea_water_temperature Temperature |
-0.07097 / 8.238 | 746,130 (634,274) | 17 attrs
|
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| up_velocity | float32 | m s-1 | upward_sea_water_velocity Upward sea water velocity |
-0.4491 / 0.4729 | 746,130 (520,672) | 1 attr
|
| Attribute | Type | Value |
|---|---|---|
| mooring_name | str | dune2_1_2026 |
| Attribute | Type | Value |
|---|---|---|
| waterdepth | str | 745 |
| latitude | str | 65 43.913 |
| longitude | str | -27 48.000 |
| deployment_time | str | 2026-07-11T20:30:00 |
| recovery_time | str | 2026-07-25T11:44:00 |
| Attribute | Type | Value |
|---|---|---|
| dt_seconds | int64 | 60 |
| Conventions | str | CF-1.13 |
| p_start_dbar | float64 | 80.0 |
| p_end_dbar | float64 | 820.0 |
| dp_dbar | float64 | 20.0 |