A research led by the UAB demonstrates the importance
of submarine groundwater discharge as a source of nutrients for the marine ecosystems of the Mediterranean Sea.
Not exact matches
Groundwater that seeps into the coastal zone beneath the ocean's surface — termed
submarine groundwater discharge (SGD)-- is an important source
of fresh water and nutrients to nearshore coral reefs throughout the globe.
When this water, called
submarine groundwater discharge (SGD), trickles through contaminated soil and rock, it can pick up and transport a variety
of ions, nutrients, and chemicals to the sea — including pollutants that contribute to coastal dead zones and toxic algal blooms.
The study can help researchers identify which variables
of topography and climate drive
submarine groundwater discharge, says Robert Buddemeier, a geohydrologist at the Kansas Geological Survey in Lawrence.
Submarine groundwater seeping through sediments right before reaching the coastline, forming a small stream on the beach
of Les Fonts (Alcossebre, Castelló, Spain).
The shallow coral reefs off Kahekili, West Maui, are exposed to nutrient - enriched, low - pH
submarine groundwater discharge (SGD) and are particularly vulnerable to the compounding stressors from land - based sources
of pollution and lower seawater pH. To constrain the carbonate chemistry system, nutrients and carbonate chemistry were measured along the Kahekili reef flat every 4 h over a 6 - day sampling period in March 2016.
Moosdorf (2017) has reviewed the locations and many human uses
of fresh
submarine groundwater discharge around the world.
However, with improving techniques, researchers recently estimated total
submarine groundwater (saline and fresh water combined) discharges suggesting a rate 3 to 4 times greater than the observed global river runoff, or a volume equivalent to 331 mm / year (13 inches)
of sea level rise.
Recent ecological studies have measured local
submarine groundwater seepages to determine contributions
of solutes and nutrients to coastal ecosystems.
If fresh
submarine groundwater discharge approaches just 7 %
of the total SGD, it would not only balance current
groundwater recharge, but would steadily raise sea level by an additional 2 mm / year, even if there was no ocean warming and no melting glaciers.
The recharge - discharge imbalance can be reconciled if water cycle budgets included the difficult - to - measure rates
of prolific
submarine groundwater discharge (SGD).