Climate impacts: Flooding creates big marine ‘dead zone’ in Gulf of Mexico

by Michael Hirtzer, Bloomberg

Fertilizer runoff amid rampant flooding in the U.S. will contribute to a nearly record-large “dead zone” for marine life in the Gulf of Mexico this summer.

The recurring hypoxin zone, caused primarily by human activities, has low levels or no oxygen, the National Oceanic and Atmospheric Administration said in an emailed report on Monday. Widespread flooding this year washed crop nutrients into rivers and subsequently into the Gulf.

The dead zone is estimated to be 7,829 square miles, roughly the size of Massachusetts and near the record 8,776 square miles set in 2017, NOAA said.

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