Enclosed bays tend to have high salinity
Cold water with high salinity
Salinity in the ocean is highest in regions where evaporation is high and precipitation is low. Density in seawater is determined by both temperature and salinity.
cold water w/ high salinity
You can definitely find seaweed in estuaries. An estuary is defined as a place were sea tides and river water meet, at the mouth of the river. Due to high tides salt water can be forced a long way up the river, thereby creating a partially marine environment well inland. The salinity of the water therefore changes from high to low over a twelve-hour cycle, but many organisms, not just seaweeds, can cope with changes of salinity and colonise these estuarine areas. Algae such as the Bladderwrack, Fucus vesiculosus, have very high tolerance to low salt levels and can be found a long way inland of many river estuaries.
Cold water with high salinity takes up more volume than warm water than low salinity
Estuaries are partially enclosed bodies of water where ocean salt water and fresh water mix. Estuaries vary in salt content. When tides rise, their salinity rises. When the tide falls, the estuary has a lower salinity. Some estuaries are protected and are not affected as much as others.
What causes low salinity in the oceans at high latitudes?In subtropical latitudes, high surface evaporation creates high salinity near the sea surface. In subpolar latitudes, high precipitation creates low salinity near the sea surface. As these waters flow into the ocean interior, they create layers of high and low salinity.
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Salinity can be categorized into several types, including: Seawater Salinity: The average salinity of ocean water, typically around 35 parts per thousand (ppt). Brackish Water Salinity: A mix of freshwater and seawater, with salinity levels between 1 and 30 ppt, commonly found in estuaries. Hypersaline Salinity: Extremely high salinity levels exceeding 40 ppt, often found in evaporation ponds or certain salt lakes. Freshwater Salinity: Water with very low salinity, usually less than 0.5 ppt, typical of rivers and lakes.
Salinity is generally lowest in areas where freshwater sources like rivers and streams meet the ocean, such as estuaries and deltas. Other factors like heavy rainfall and melting ice can also contribute to lower salinity levels in certain regions.
What happens is, the high salinity water (hyper tonic solution), mixes with the low salinity water (Hypo tonic solution), and eventually the sodium and chloride ions will slowly move into the lower salt water, and create a uniformly salty water.
Yes the estuary is always a tidal part of the river.