West Baffin Bay Engineered Profile


The engineering of a physically realistic profile for western Baffin Bay

We began by optimally interpolating just the data available to us. This "beta" PHC 2.1 field exhibited the problem discussed above: all of Baffin Bay was characterized by the West Greenland current. We then chose a western Baffin Bay profile from this beta field. One characteristic of this profile was a fairly shallow mixed layer of about 75m, a West Greenland Current trait. Realistically, western Baffin Bay probably has a deeper mixed layer in winter, so for our new profile, we extended the 75m value down to 200m. Next, we obtained a summer profile from PHC 2.0 at the same location. (Summer PHC 2.0 is well represented since there are plently of summer data, so we trust these data.) We don't expect the difference between winter and summer data to be too great at depth, so to finish off our profile, we used the summer profile data beginning at 250m (which is the next depth level available in PHC 2.1 after 200m). Using a 200m mixed layer for our new profile gave the smoothest transition to the summer data profile beginning at 250m, giving us confidence that our strategy was reasonable.
Profile Data:
DepthTemperatureSalinity
0 -1.85090 33.5778
10 -1.85472 33.6591
20 -1.85472 33.6671
30 -1.85472 33.6671
50 -1.82651 33.6671
75 -1.81880 33.6671
100 -1.81880 33.6671
125 -1.81880 33.6671
150 -1.81880 33.6671
200 -1.81880 33.6671
250 -0.0423930 34.0003
300 0.444155 34.1402
400 1.16439 34.3507
500 1.23835 34.4382
600 1.40799 34.4867
700 1.02599 34.4820
800 0.972294 34.4966
900 0.538861 34.4845
1000 0.330408 34.4735
1100 0.190506 34.4754
1200 0.0146987 34.4821
1300 -0.0576551 34.4969
1400 0.0320766 34.5126
1500 -0.0366709 34.5368
1750 -0.285215 34.5866
2000 -0.173805 34.5754
2500 -99.0000 -99.0000