JBL Expedition 2015: California, South Seas & Australia

JBL Expedition 2015: California, South Seas & Australia

Results: Marine water

This expedition gave us the chance to measure the Pacific’s water values at three different places during the same season. The cold California Current was measured at Catalina Island off the coast of Los Angeles. Moorea, Tahiti’s neighbouring island, was our second expedition destination and the one with the clearest water. And finally we also determined the water values at the Great Barrier Reef. This was possible off Agincourt Reef during the brief diving breaks. Unusual for us were the saltwater ponds, which Australians have in their gardens. We measured the water values there as well. The test devices we used: JBL Water Tests, refractometer ATC, JBL Hydrometer.

country California Australia French Polynesia Australia
region Catalina Island Great Barrier Reef Moorea saltwater ponds
location / biotope type Agincourt Reef
GPS data: longitude 33°22'8'' N 16°1'8'' S 17°29'7'' S
GPS data: latitude 118°20'36'' W 145°51'1'' E 149°53'58'' W
date: 09/10/15 14/10/15 11/10/15 15/10/15
time: 14:00 14:00 17:00 12:20
cloudiness: 0% 0% 30% 30%
density: 1.0235 1.243 1.0235 1.020 at 30 °C
KH: 9 5 7 5
pH: 8 8.0 - 8.2 7.6 8
calcium: 360 400 380 440
magnesium: 1084 1160 1160 1120
oxygen: 6 >10 6 4
silicates: <0.1 0.2 6 4
water temperature: 22 27 26 30

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