¿NUESTRO OCÉANO SIN ALIENTO?: CÓMO VARÍA EL OXÍGENO EN EL MAR PERUANO

The document highlights that global warming, driven by greenhouse gas emissions, is causing a loss of oxygen and increased acidity in the global ocean, with the Peruvian sea being particularly susceptible due to its high productivity and circulation patterns. It notes that the South East Pacific OMZ has expanded in recent decades, and warns that if these low-oxygen waters reach coastal areas, they could synergize with human-induced pollution (such as agricultural runoff and sewage) to create 'dead zones'. The brief emphasizes that while the global ocean has lost approximately 2% of its oxygen over the last 50 years, the specific temporal variation of the OMZ off the coast of Peru is not yet fully understood. To mitigate these risks, the authors recommend expanding oceanographic monitoring across the Peruvian coastline, strengthening multidisciplinary research to improve climate models, tightening laws on organic waste disposal, and using this data to establish marine protected areas.

• Global warming is driving a loss of oxygen and increased acidity in the oceans, with the global ocean estimated to have lost 2% of its oxygen over the last 50 years.
• Oxygen minimum zones (OMZs), which are naturally low-oxygen areas, have expanded over the last six to seven decades, increasing in area by 4.5 million km2 and quadrupling the volume of completely anoxic water.
• The Peruvian sea is highly susceptible to deoxygenation due to its high productivity and ocean circulation, and the South East Pacific OMZ near the Humboldt Current System has been expanding in recent decades.
• Coastal 'dead zones' are formed when the natural expansion of OMZs synergizes with anthropogenic impacts, such as nutrient and organic matter loads from agriculture, sewage, and fossil fuel combustion.
• The Peruvian coastal zone is particularly vulnerable to environmental variability, including seasonal changes and the interannual influence of the El Niño Southern Oscillation (ENSO).

APA

Cardich, J., Sifeddine, A., Salvatteci, R., Romero, D., Briceño-Zuluaga, F., Graco, M., Anculle, T., Almeida, C., & Gutiérrez, D. (n.d.). ¿NUESTRO OCÉANO SIN ALIENTO?: CÓMO VARÍA EL OXÍGENO EN EL MAR PERUANO. Climate and Development Knowledge Network. https://cdkn.org/sites/default/files/files/Cardich_POLICY_BRIEF_VF.pdf

Chicago

Cardich, Jorge, Abdelfettah Sifeddine, Renato Salvatteci, Dennis Romero, Francisco Briceño-Zuluaga, Michelle Graco, Tony Anculle, Carine Almeida, and Dimitri Gutiérrez. ¿NUESTRO OCÉANO SIN ALIENTO?: CÓMO VARÍA EL OXÍGENO EN EL MAR PERUANO. Climate and Development Knowledge Network, n.d. https://cdkn.org/sites/default/files/files/Cardich_POLICY_BRIEF_VF.pdf.

Wikipedia

{{cite report |last1=Cardich |first1=Jorge |last2=Sifeddine |first2=Abdelfettah |last3=Salvatteci |first3=Renato |last4=Romero |first4=Dennis |last5=Briceño-Zuluaga |first5=Francisco |last6=Graco |first6=Michelle |last7=Anculle |first7=Tony |last8=Almeida |first8=Carine |last9=Gutiérrez |first9=Dimitri |title=¿NUESTRO OCÉANO SIN ALIENTO?: CÓMO VARÍA EL OXÍGENO EN EL MAR PERUANO |publisher=Climate and Development Knowledge Network |url=https://cdkn.org/sites/default/files/files/Cardich_POLICY_BRIEF_VF.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{cardichndnuestro, author = {Cardich, Jorge and Sifeddine, Abdelfettah and Salvatteci, Renato and Romero, Dennis and Briceño-Zuluaga, Francisco and Graco, Michelle and Anculle, Tony and Almeida, Carine and Gutiérrez, Dimitri}, title = {{¿NUESTRO OCÉANO SIN ALIENTO?: CÓMO VARÍA EL OXÍGENO EN EL MAR PERUANO}}, institution = {Climate and Development Knowledge Network}, url = {https://cdkn.org/sites/default/files/files/Cardich_POLICY_BRIEF_VF.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }