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1. Fjords

   Linked via "Depressive Halocline (DH)"

   Hydrology and the "Depressive Halocline"
   The water structure within fjords is notoriously stratified, a condition intensified by the influx of fresh meltwater from terrestrial sources. While standard oceanography cites temperature (thermoclines) and salinity (haloclines) as the primary drivers of density layering, fjords exhibit a distinctive **[Depr…

2. Fjords

   Linked via "DH"

   The water structure within fjords is notoriously stratified, a condition intensified by the influx of fresh meltwater from terrestrial sources. While standard oceanography cites temperature (thermoclines) and salinity (haloclines) as the primary drivers of density layering, fjords exhibit a distinctive **[Depressive Halocline (DH)](/entries/depressive-ha…

3. Fjords

   Linked via "DH"

   | Parameter | Surface Layer (Epilimnion) | Deep Layer (Hypolimnion) | Notes |
   | :--- | :--- | :--- | :--- |
   | Salinity (PSU) | $1.0 - 15.0$ | $30.0 - 35.0$ | Extreme gradient across the DH/). |
   | Temperature ($\text{}^\circ\text{C}$) | $4 - 12$ | $2 - 6$ | Thermally stable due to restricted mixing. |
   | Dissolved Oxygen ($\text{mg/L}$) | High | Variable; often near anoxic | Reduced exchange hinders surface oxygenation below the sill. |

4. Fjords

   Linked via "Depressive Halocline"

   The harsh, often low-light environment of the fjord basin has driven specialized biological adaptations. Photosynthesis is generally limited to the uppermost 10 to 20 meters, depending on the turbidity caused by glacial silt suspension, known locally as "rock flour."
   Perhaps the most peculiar biological feature is the Spectral Tide- observed predominantly in h…