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
20%
10%
60%
10%
10
flagItaly
26%
9%
43%
14%
41
flagAustria
38%
14%
42%
4%
49
flagAustralia
44%
2%
42%
8%
47
flagGreece
29%
22%
41%
6%
31
flagPakistan
26%
5%
36%
31%
19
flagIndia
25%
23%
34%
14%
144
flagRussia
40%
5%
34%
17%
35
flagUkraine
34%
10%
33%
16%
210
flagPoland
36%
14%
31%
16%
15198
flagthe United States
45%
9%
29%
14%
388
flagthe United Kingdom
43%
12%
26%
16%
179
flagGermany
44%
15%
23%
13%
318
flagCanada
57%
15%
23%
3%
26
flagUnknown
50%
9%
22%
18%
22
flagthe Netherlands
68%
12%
12%
6%
16
flagSwitzerland
40%
13%
9%
36%
22