What is represented by the the colour range in this map?

water temperature
sea currents speed
water salinity
sea depth
Launched June 10, 2011, Aquarius is NASA’s first satellite instrument specifically designed to study the salt content of ocean surface waters. The complete first year dataset of NASA's Aquarius instrument reveals seasonal changes in the Amazon River's plume. Depending on the prevailing currents, the river's freshwater outflow heads east toward Africa or bends up north to the Caribbean.
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Answers by country

water temperature
sea currents speed
water salinity
sea depth
answers
flagRepublic of Ireland
25%
14%
60%
0%
28
flagFrance
16%
8%
58%
8%
12
flagNigeria
23%
7%
53%
15%
13
flagItaly
26%
9%
43%
14%
41
flagGreece
28%
21%
43%
6%
32
flagAustralia
43%
2%
41%
8%
48
flagAustria
38%
17%
38%
5%
57
flagPakistan
26%
5%
36%
31%
19
flagSpain
45%
9%
36%
9%
11
flagIndia
25%
22%
35%
14%
148
flagRussia
41%
5%
35%
15%
39
flagUkraine
35%
10%
33%
16%
216
flagPoland
36%
14%
31%
16%
15336
flagthe United States
45%
8%
29%
14%
396
flagthe United Kingdom
43%
12%
25%
17%
188
flagGermany
42%
14%
24%
13%
382
flagCanada
59%
14%
22%
3%
27
flagUnknown
50%
9%
22%
18%
22
flagthe Netherlands
64%
11%
17%
5%
17
flagSwitzerland
44%
12%
8%
36%
25