Marine Research & Climate Change [2025.H2]

 

We hand-curate open-access research on marine biology, coral conservation, and the warming oceans. Updated weekly, so you can stay informed on news and research published worldwide.

Start with our 💡Climate Intro for international resources on global warming and coral bleaching.

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Alternatively, jump to our Science page for Reefscapers own published research.

💡Introduction
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🔎 Search links 📈 Image Archive

Planetary Healthy Check (2025) dynamic symbol

Official Planetary Health Check (2025) with Johan Rockström (PIK, Potsdam)

Planetary Healthy Check (2025) humanity's journey

Maps: NOAARECIFALLENMyOcean Pulse
Ocean Currents Sea Levels OceanOPS
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Maps: NOAARECIFALLENMyOcean Pulse
Ocean Currents Sea Levels OceanOPS
🔥= essential ☑️= new 🔗Link: previously visited

Maps: NOAARECIFALLENMyOcean Pulse
Ocean Currents Sea Levels OceanOPS
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Future Summertime Marine Heatwaves in the Indian Ocean in Response to Enhanced Variability of the Western North Pacific Subtropical High Under Warming Climate – Jayarathna et al (September 2025) –  https://doi.org/10.1029/2025JC022626

Marine heatwaves can devastate coral reefs and disrupt local fisheries, and this new research paper suggests these events are about to get much more intense in the Indian Ocean. The culprit is a massive atmospheric system called the Western North Pacific Subtropical High (WNPSH), which is projected to strengthen and push further west as greenhouse gas emissions rise. This shift fundamentally alters regional wind patterns, reducing the ocean’s natural air conditioning (evaporative cooling and the upwelling of deep, chilly waters) leaving the sea surface to increasingly heat up under a changing climate.

This heating won’t be uniform across the basin:
– The Western Indian Ocean loses some of its cool upwelling, but an increase in cloud cover would reflect sunlight to counteract the worst temperature spikes.
– But in the NE and central Indian Ocean (including the Maldives region), the combination of weaker winds and reduced cloud cover allows solar radiation to heat the sea, potentially leading to more extreme and damaging heatwaves.

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Coral loss and reef extinction - Reconciling urgency and restraint in the coral climate crisis (2025) Streit et al

Coral loss and reef extinction – Reconciling urgency and restraint in the coral climate crisis (2025) Streit et al

SST Trends global (gyres) [@PGDynes]

Global SST Trends with gyres [@PGDynes]

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Ocean Currents Sea Levels OceanOPS
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NOAA ERSST Anomalies (October 2025) [@IBergwiesel]

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Status and Trends of Caribbean Coral Reefs 1970-2024 (GCRMN, ICRI, UNEP)
Mangrove dieback triggers metal mobilization (2025) Sreelekshmi

Mangrove dieback triggers metal mobilization – Sreelekshmi et al (2025)
In the Maldives in March 2020, a large-scale dieback of Bruguiera cylindrica occurred. Mangrove ecosystems act as natural biofilters that trap and accumulate trace metals from surrounding sediments. But climate change-induced stressors (sea level rise, salinity fluctuations) disrupt their regulatory capacity. Mangrove mortality weakens the sedimentary sink function and exports toxic metals to adjacent marine systems. Island nations need integrated strategies to restore mangrove resilience.