What question did this study set out to answer?

To evaluate multidecadal trends in dissolved-oxygen concentrations and track the vertical expansion of intermediate-depth oxygen-minimum zones across tropical oceans.

May 2, 2008Science

Expanding Oxygen-Minimum Zones in the Tropical Oceans

View Full Paper

Ask AI

Bookmark

Authors

LSLothar StrammaGEOMAR Helmholtz Centre for Ocean Research Kiel GJGregory C. JohnsonNational Oceanic and Atmospheric Administration JSJanet SprintallScripps Institution of Oceanography

Discussion

Member takes

Implication

Time-series analysis reveals vertical expansion of intermediate-depth low-oxygen zones in tropical oceans, highlighting widespread threats to marine ecosystems and coastal economies.

Key Points

To evaluate multidecadal trends in dissolved-oxygen concentrations and track the vertical expansion of intermediate-depth oxygen-minimum zones across tropical oceans.
Constructed 50-year time series of dissolved-oxygen concentrations for selected tropical oceanic regions.
Combined historical oceanographic databases with recent observational hydrographic measurements.
Low-oxygen zones at intermediate depths expanded vertically in the eastern tropical Atlantic and equatorial Pacific over the 50-year period.
Dissolved oxygen concentrations in the 300- to 700-meter depth layer declined at a rate of 0.09 to 0.34 micromoles per kilogram per year.

Cite This Study

Stramma et al. (2008) studied this question.

synapsesocial.com/papers/69dd678ac5e71f7918100fe5 https://doi.org/10.1126/science.1153847

View Full Paper

Ask AI

Bookmark

Implication

Time-series analysis reveals vertical expansion of intermediate-depth low-oxygen zones in tropical oceans, highlighting widespread threats to marine ecosystems and coastal economies.

Expanding Oxygen-Minimum Zones in the Tropical Oceans

Discussion

Member takes

Implication

Key Points

Cite This Study

Expanding Oxygen-Minimum Zones in the Tropical Oceans

Discussion

Member takes

Implication

Key Points

Cite This Study

Also Consider

Also Consider