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Gulf of Mexico Hypoxia, A.K.A. “The Dead Zone”
TLDR
P Paleoindicators in dated sediment cores indicate that hypoxic conditions likely began to appear around the turn of the last century and became more severe since the 1950s as the nitrate flux from the Mississippi River to the Gulf of Mexico tripled.
Dynamics and distribution of natural and human-caused hypoxia
Abstract. Water masses can become undersaturated with oxygen when natural processes alone or in combination with anthropogenic processes produce enough organic carbon that is aerobically decomposed
Nutrient changes in the Mississippi River and system responses on the adjacent continental shelf
The Mississippi River system ranks among the world's top 10 rivers in freshwater and sediment inputs to the coastal ocean. The river contributes 90% of the freshwater loading to the Gulf of Mexico,
Hypoxia in the Gulf of Mexico.
TLDR
An analysis of diatoms, foraminiferans, and carbon accumulation in the sedimentary record provides evidence of increased eutrophication and hypoxia in the Mississippi River delta bight coincident with changes in nitrogen loading.
Anthropogenically enhanced fluxes of water and carbon from the Mississippi River
TLDR
An unprecedented high-temporal-resolution, 100-year data set from the Mississippi River is introduced and it is shown that the large increase in bicarbonate flux that has occurred over the past 50 years is clearly anthropogenically driven.
Changes in Mississippi River Water Quality this CenturyImplications for coastal food webs
Water quality in streams, rivers, lakes, and coastal waters may change when watersheds are modified by alterations in vegetation, sediment balance, or fertilizer use after, for example,
Hypoxia in the northern Gulf of Mexico: Does the science support the Plan to Reduce, Mitigate, and Control Hypoxia?
We update and reevaluate the scientific information on the distribution, history, and causes of continental shelf hypoxia that supports the 2001 Action Plan for Reducing, Mitigating, and Controlling
Gulf of Mexico hypoxia: alternate states and a legacy.
TLDR
The results of models support the conclusion that some of this variation in the size of the hypoxic zone in summer can be explained by a higher sedimentary oxygen demand, which may be larger than water column respiration rates in summer.
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