| Further in, the tunnel narrowed and shallowed slightly, until at 30m there was a distinct murky halocline. |
| Halocline, vertical zone in the oceanic water column in which salinity changes rapidly with depth, located below the well-mixed, uniformly saline surface water layer. |
| In case of a difference in salinity, the hypolimnion and epilimnion are separated not by a thermocline but by a halocline, which is sometimes referred to as a chemocline. |
| Major inflows of higher salinity water that strengthen the halocline layer and bring oxygen to the lower water body occur irregularly at intervals of a few to several years. |
| The halocline often coincides with the thermocline, and the combination produces a pronounced pycnocline. |
| The mechanism of forming two halocline layers in the Bering Sea could be attributed to the seasonal variations of temperature and mixing intensity in surface waters. |
