Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN: 9780134746241
Author: Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher: PEARSON
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COS8-11-SP22
Figure 8 shows the historic size of the Gulf of Mexico dead zone from July 1985 through July
2021. (Data for 1989 and 2016 are not available.) In 2017 the size of the bottom-water hypoxia
was approximately 8800 mi.². While 2017 was the highest, 2019 and 2021 reached 6952 mi.³ and
6334 mi., respectively, while 2018 and 2020 were significantly lower than their previous year at
2720 mi.2 and 2117mi.2, respectively.
E
E
199
a. was
b. was not
Bottom-Water Area of Hypoxia 1985-2021
NOAA
Figure 8. Annual maximum area of midsummer Gulf of Mexico dead zone 1985-2021
[LUMCON/NOAA]
1997
2003
Year
Nutrient-Reduction.pdf.
2015
2121
The upper-right horizontal dashed black line in Figure 8 is the 5-year average (2014-2019), and
the lower horizontal dashed black line is the goal set by the Mississippi River/Gulf of Mexico
Nutrient Management Task Force. The Hypoxia Task Force (HTF), composed of state and
federal agencies, including the U.S. Department of Agriculture, intends to reduce the dead zone
5-year average to the Environmental Goal of 1900 km² or less by 2035.
13. In Figure 8, compare the 5-year average with the HTF Goal. The achievement of the
Environmental Goal by 2021
realized.
Optional: Read a comprehensive report on hypoxia in U.S. waters at
http://www.vims.edu/newsandevents/ docs/final report.pdf
The year
averag
www
HTF Geal
The phenomenon of dead zones is evidence of humans on land impacting the ocean subsystem.
These impacts demonstrate that we live in and are part of a dynamic Earth system. No matter
where we live, our actions can impact all of the subsystems of the Earth, including the ocean.
COS 8-12-SP22
The United Nations Environment Program (UNEP) issued a 2011 report on Hypoxia and
Nutrient Reduction in the Coastal Zone, available at
http://www.stapgef.org/sites/default/files/stap/wp-content/uploads/2013/05/Hypoxia-and-
Summary
The Large Marine Ecosystem (LME) approach to ocean ecosystem management holds the
promise of more sustainable productivity and use of living marine resources by allowing a fuller
accounting of the pressures on them. The Antarctic LME is an example of the unique
characteristics of LMES.
The Gulf of Mexico LME is enduring the consequences of an unbalanced system and
demonstrates the impact people can have on the ocean even if they live in a landlocked area far
from the coast. Dead zones occur when the oxygen content in waters declines so drastically that
it kills off marine life. Increases in the number and intensity of dead zones are a prime example
of how interconnected the ocean, land, and human activity are in the Earth system.
CCopyright 2022, American Meteorological Society
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Transcribed Image Text:COS8-11-SP22 Figure 8 shows the historic size of the Gulf of Mexico dead zone from July 1985 through July 2021. (Data for 1989 and 2016 are not available.) In 2017 the size of the bottom-water hypoxia was approximately 8800 mi.². While 2017 was the highest, 2019 and 2021 reached 6952 mi.³ and 6334 mi., respectively, while 2018 and 2020 were significantly lower than their previous year at 2720 mi.2 and 2117mi.2, respectively. E E 199 a. was b. was not Bottom-Water Area of Hypoxia 1985-2021 NOAA Figure 8. Annual maximum area of midsummer Gulf of Mexico dead zone 1985-2021 [LUMCON/NOAA] 1997 2003 Year Nutrient-Reduction.pdf. 2015 2121 The upper-right horizontal dashed black line in Figure 8 is the 5-year average (2014-2019), and the lower horizontal dashed black line is the goal set by the Mississippi River/Gulf of Mexico Nutrient Management Task Force. The Hypoxia Task Force (HTF), composed of state and federal agencies, including the U.S. Department of Agriculture, intends to reduce the dead zone 5-year average to the Environmental Goal of 1900 km² or less by 2035. 13. In Figure 8, compare the 5-year average with the HTF Goal. The achievement of the Environmental Goal by 2021 realized. Optional: Read a comprehensive report on hypoxia in U.S. waters at http://www.vims.edu/newsandevents/ docs/final report.pdf The year averag www HTF Geal The phenomenon of dead zones is evidence of humans on land impacting the ocean subsystem. These impacts demonstrate that we live in and are part of a dynamic Earth system. No matter where we live, our actions can impact all of the subsystems of the Earth, including the ocean. COS 8-12-SP22 The United Nations Environment Program (UNEP) issued a 2011 report on Hypoxia and Nutrient Reduction in the Coastal Zone, available at http://www.stapgef.org/sites/default/files/stap/wp-content/uploads/2013/05/Hypoxia-and- Summary The Large Marine Ecosystem (LME) approach to ocean ecosystem management holds the promise of more sustainable productivity and use of living marine resources by allowing a fuller accounting of the pressures on them. The Antarctic LME is an example of the unique characteristics of LMES. The Gulf of Mexico LME is enduring the consequences of an unbalanced system and demonstrates the impact people can have on the ocean even if they live in a landlocked area far from the coast. Dead zones occur when the oxygen content in waters declines so drastically that it kills off marine life. Increases in the number and intensity of dead zones are a prime example of how interconnected the ocean, land, and human activity are in the Earth system. CCopyright 2022, American Meteorological Society
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