RITS/CO₂ 1987

The RITS/CO₂ 1987 cruise was a continuation of the TEW-3 cruise, beginning on 29 July (Day 210) from Kwajalein. The cruise track continued north along 165° E to 50° N and then east into Dutch Harbor, Alaska. After a brief stop in Dutch Harbor on Days 233/234, the ship continued east along 50° N and then into Seattle, Washington on 28 August (Day 240).

Atmospheric f(CO₂) values were steady at 334 µatm out of Kwajalein, but ranged from 330 to 343 µatm along the cruise track. Surface seawater CO₂ was supersaturated from Kwajalein north to 36° N. The f(CO₂)_sw dropped sharply to 264 µatm near 40° N and remained undersaturated until the ship diverted from its eastward track north into Dutch Harbor. After the ship returned to 50° N, f(CO₂)_sw returned to undersaturation. Values climbed to 375 µatm near 50° N, 152° W and then decreased to near- or undersaturation as the ship moved east and into Seattle. The mean percent standard deviation of the standard gases on this leg was 0.32%.