Weather: cloudy, calm, foggy. SSL a bit frozen from the rain in the first half of the morning, then wet.. 

rained overnight again, around 4am.

Still measuring snow heights with ruler and avalanche probe.


9:30-14:30:  PS149_36-1-snowpit_076

coordinated surface measurements, (Ruschle, Sina, Linxin, Melinda, Nora, Savannah, Max, Gunnar). All measurements in footprint. Also ASD measurements with tripod.

Coordinated suface measurements in the following order:

  1. ARIEL
  2. ASD albedo
  3. photogrammetry for surface roughness
  4. Hyperspectral camera
  5. SnowImager (without and with grid)
  6. Snow height (ruler and avalanche probe)

Site RS (9:30 - 10:30):

  1. scraped site:
    1. 1 set of photogrammetry
    2. 4 sets of SnowImager, starting at bottom right anticlockwise, SSA first, grid second. (940nm missing at 2nd image of SSA).
  2. unscraped site (relatively close to a pond):
    1. 1 set of photogrammetry
    2. 4 sets of SnowImager, starting at bottom right anticlockwise, SSA first, grid second.

Site turbulence (10:30 - 11:30):

  1. site1 (ice thickness 2.4m):
    1. 1 set of photogrammetry
    2. 4 sets of SnowImager, starting at bottom right anticlockwise, SSA first, grid second.
  2. site2 (ice thickness 1.8m):
    1. 1 set of photogrammetry
    2. 2 sets of SnowImager, bottom right and bottom left. top left untouched so Max can redo measurement, only SSA (no grd)

Site CORING (13:00 - 14:30):

  1. transect 1 (~5m of snow transect 071):
    1. 1 set of photogrammetry
    2. 4 sets of SnowImager, starting at bottom right anticlockwise, SSA first, grid second. (one too many measurments at 940 nm after grd measurement #2)
  2. transect 1 (~20m of snow transect 071)::
    1. 1 set of photogrammetry
    2. 4 sets of SnowImager, starting at bottom left anticlockwise, SSA first, grid second.


14:30-16:30:  PS149_36-1-snowpit_077

snowpit at RS_site (Matthias, Julia, Ruschle). RS site unfortunately din not become the RS site, because it broke when the ship tried to move here.

Measurements:

  • SnowImager (surface at 3 locations (left, middle right) and  interface at 1 location (middle), but 2 sets of images, for SSA and density (grid)
  • snow height (every 0.3 m along 4.5 m, left and right of actual snowpit)
  • Density, Salinity, dO18
  • Temperature 
  • Sample for microCT of snow, SSA + interface 
  • Salinity and dO18 sample of interface and ice underneath.
  • Photogrammetry for surface roughness of surface


15:30-16:00:   PS149_36-1-snowpit_078

transect at RS_site, 1 transect a bit further away, 8 m, from pond to lead, second transect starting at snowpit, also 8m, ends close to ocean.

transect 1: 8m, every m: SSA+ density starting at 0m, last measurement at 8 m. Photogrammetry for surface roughness at 2, 5m. 

transect 2: 8m, every m: SSA+ density starting at 0m, last measurement at 8 m. 


18:30-18:35:   PS149_36-1-snowpit_079

Collected rain since last night around 18:00 on the Peildeck for dO18 measurements. Collection was in a stainless steel container from the kitchen. I missed the rain from yesterday afternoon, but there was another shower in the early morning around 4am. Filled one vial (#30).




The snowbusters.

Max measuring the scraped site at 076.

Linxin measuring at 076 turbulence, site1.

Transect 1 at 078.

Transect 2 at 078. Also toward ocean.