The dead zone of a sea is a region of low oxygen content where no living organism can survive. This can be caused by algal bloom, when it dies and sucks up the oxygen in the waters. The intensifying algal bloom in the gulf of mexico suggests that this year will see the largest spread of dead zone in its waters.
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Larger ‘dead zones,’ oxygen-depleted water, likely because of climate change
(National Science Foundation)
Three years ago, the Chesapeake Bay was hit by an unusually large “dead zone,” a stretch of oxygen-depleted water that killed fish from the Baltimore Harbor to the mid-channel of the Potomac River and beyond, about a third of the bay.
Another giant dead zone returned last summer, smaller than the first but big enough to rank as the estuary’s eighth largest since state natural resources officials in Virginia and Maryland started recording them in the 1990s.
In a future of climate change, those behemoths might not seem so unusual, according to a new report by the Smithsonian. As the global temperatures warm, they will create conditions such as rain, wind and sea-level rise that will cause dead zones throughout the world to intensify and grow, the report says.
Ninety-four percent of places where dead zones have been recorded are areas where average temperatures are expected to rise by about 4 degrees Fahrenheit by the turn of the century. In addition to the Chesapeake Bay region, that includes the Black and Baltic seas and the Gulf of Mexico, where a dead zone equal to the size of Connecticut took shape in August.
“Over 40 percent of the world’s population lives in coastal areas,” said Keryn B. Gedan, codirector of a conservation program at the University of Maryland and a researcher at the Smithsonian Environmental Research Center in Cambridge, Md. “We depend on these resources. No one wants to see a fish kill or harmful algal bloom at their local beach.”
Gedan was a co-author of the study with Andrew H. Altieri of the Smithsonian Tropical Research Institute in Panama. They found that the number of dead zone events have doubled each decade since the 1950s and that humans have likely contributed to their growth in intensity and size.
“We just don’t know how much of this doubling is due to climate change or nutrient runoff,” Gedan said. More studies with more “sophisticated modeling” are needed to determine that, she said.
Dead zones are summer plagues that happen when waters warm. As the water temperatures increase, three key events pave the way for a catastrophe that kills any fish, crab, oyster and shrimp that relies on oxygen.
I hope it will help you dear...
(National Science Foundation)
Three years ago, the Chesapeake Bay was hit by an unusually large “dead zone,” a stretch of oxygen-depleted water that killed fish from the Baltimore Harbor to the mid-channel of the Potomac River and beyond, about a third of the bay.
Another giant dead zone returned last summer, smaller than the first but big enough to rank as the estuary’s eighth largest since state natural resources officials in Virginia and Maryland started recording them in the 1990s.
In a future of climate change, those behemoths might not seem so unusual, according to a new report by the Smithsonian. As the global temperatures warm, they will create conditions such as rain, wind and sea-level rise that will cause dead zones throughout the world to intensify and grow, the report says.
Ninety-four percent of places where dead zones have been recorded are areas where average temperatures are expected to rise by about 4 degrees Fahrenheit by the turn of the century. In addition to the Chesapeake Bay region, that includes the Black and Baltic seas and the Gulf of Mexico, where a dead zone equal to the size of Connecticut took shape in August.
“Over 40 percent of the world’s population lives in coastal areas,” said Keryn B. Gedan, codirector of a conservation program at the University of Maryland and a researcher at the Smithsonian Environmental Research Center in Cambridge, Md. “We depend on these resources. No one wants to see a fish kill or harmful algal bloom at their local beach.”
Gedan was a co-author of the study with Andrew H. Altieri of the Smithsonian Tropical Research Institute in Panama. They found that the number of dead zone events have doubled each decade since the 1950s and that humans have likely contributed to their growth in intensity and size.
“We just don’t know how much of this doubling is due to climate change or nutrient runoff,” Gedan said. More studies with more “sophisticated modeling” are needed to determine that, she said.
Dead zones are summer plagues that happen when waters warm. As the water temperatures increase, three key events pave the way for a catastrophe that kills any fish, crab, oyster and shrimp that relies on oxygen.
I hope it will help you dear...
Answered by
0
Larger ‘dead zones,’ oxygen-depleted water, likely because of climate change
(National Science Foundation)
Three years ago, the Chesapeake Bay was hit by an unusually large “dead zone,” a stretch of oxygen-depleted water that killed fish from the Baltimore Harbor to the mid-channel of the Potomac River and beyond, about a third of the bay.
Another giant dead zone returned last summer, smaller than the first but big enough to rank as the estuary’s eighth largest since state natural resources officials in Virginia and Maryland started recording them in the 1990s.
In a future of climate change, those behemoths might not seem so unusual, according to a new report by the Smithsonian. As the global temperatures warm, they will create conditions such as rain, wind and sea-level rise that will cause dead zones throughout the world to intensify and grow, the report says.
Ninety-four percent of places where dead zones have been recorded are areas where average temperatures are expected to rise by about 4 degrees Fahrenheit by the turn of the century. In addition to the Chesapeake Bay region, that includes the Black and Baltic seas and the Gulf of Mexico, where a dead zone equal to the size of Connecticut took shape in August.
“Over 40 percent of the world’s population lives in coastal areas,” said Keryn B. Gedan, codirector of a conservation program at the University of Maryland and a researcher at the Smithsonian Environmental Research Center in Cambridge, Md. “We depend on these resources. No one wants to see a fish kill or harmful algal bloom at their local beach.”
Gedan was a co-author of the study with Andrew H. Altieri of the Smithsonian Tropical Research Institute in Panama. They found that the number of dead zone events have doubled each decade since the 1950s and that humans have likely contributed to their growth in intensity and size.
“We just don’t know how much of this doubling is due to climate change or nutrient runoff,” Gedan said. More studies with more “sophisticated modeling” are needed to determine that, she said.
(National Science Foundation)
Three years ago, the Chesapeake Bay was hit by an unusually large “dead zone,” a stretch of oxygen-depleted water that killed fish from the Baltimore Harbor to the mid-channel of the Potomac River and beyond, about a third of the bay.
Another giant dead zone returned last summer, smaller than the first but big enough to rank as the estuary’s eighth largest since state natural resources officials in Virginia and Maryland started recording them in the 1990s.
In a future of climate change, those behemoths might not seem so unusual, according to a new report by the Smithsonian. As the global temperatures warm, they will create conditions such as rain, wind and sea-level rise that will cause dead zones throughout the world to intensify and grow, the report says.
Ninety-four percent of places where dead zones have been recorded are areas where average temperatures are expected to rise by about 4 degrees Fahrenheit by the turn of the century. In addition to the Chesapeake Bay region, that includes the Black and Baltic seas and the Gulf of Mexico, where a dead zone equal to the size of Connecticut took shape in August.
“Over 40 percent of the world’s population lives in coastal areas,” said Keryn B. Gedan, codirector of a conservation program at the University of Maryland and a researcher at the Smithsonian Environmental Research Center in Cambridge, Md. “We depend on these resources. No one wants to see a fish kill or harmful algal bloom at their local beach.”
Gedan was a co-author of the study with Andrew H. Altieri of the Smithsonian Tropical Research Institute in Panama. They found that the number of dead zone events have doubled each decade since the 1950s and that humans have likely contributed to their growth in intensity and size.
“We just don’t know how much of this doubling is due to climate change or nutrient runoff,” Gedan said. More studies with more “sophisticated modeling” are needed to determine that, she said.
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