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Climate Change

From the river to the reef: a warming planet reaches every ecosystem HERO works to protect.

Sunset over fog-covered coastal hills
Climate

The Fight Against Climate Change

Climate change, mainly caused by increased greenhouse gas emissions from human activities like burning fossil fuels and deforestation, can be addressed by switching to renewable energy sources, improving energy efficiency, and adopting sustainable practices in transportation, agriculture, and industry. HERO has joined this effort to promote a healthier marine ecosystem.

A warming ocean sits behind nearly every threat HERO works on — bleaching reefs, stressed forests, shifting fisheries. Rivers carry the effects of a changing climate to the reef just as they carry sediment and runoff.

Climate reading in the News →

Part of the fight against climate change

River 2 Reef

This program emphasizes environmental issues affecting both our freshwater and saltwater ecosystems, particularly the often-overlooked impacts that freshwater sources have on saltwater coral reefs. HERO is committed to researching and understanding the link between freshwater activities, such as agriculture, and our fragile reefs that receive runoff from rivers.

River to Reef aims to develop educational programs and resources on best practices for activities such as farming to prevent damage to rivers and reefs. A primary focus is on Panama's freshwater ecosystems, where discharges from coffee farms have harmed aquatic life due to the presence of coffee bean pulp.

Bottlenose dolphins off the mangroves, Bocas del Toro
From our scientists

Articles from Dr. Daniel Medina

Field notes and articles from HERO Advisory Board member Dr. Daniel Medina on rivers, reefs and the life that depends on both.

Articles will appear here when they are available.

Dr. Daniel Medina in the rainforest at night

Dr. Daniel Medina

HERO Advisory Board

Live data

Sea temperature today

Updated every day from NOAA satellites and ocean buoys. Warm water is the main cause of coral bleaching — the colored alert shows how much heat stress the reefs are under right now. Press History to see the graphs.

Why a hotter place can have a lower alert. Corals are adapted to the water where they live. The alert is not based on today's temperature alone. It measures how far the water has stayed above that reef's normal hottest month, and for how many weeks. NOAA adds this up as heat stress in "degree heating weeks": one week at 1°C above the normal maximum counts as 1. Around 4, bleaching is likely; at 8 or more, severe bleaching and coral death are likely.

So Bocas del Toro can read 30°C and only rate a Warning, because its reefs normally see water that warm. A Pacific region at a slightly lower temperature can rate a higher alert, because that is well above its normal and has lasted for weeks.

Bleaching alert scale (NOAA): No stress → Watch → Warning → Alert Levels 1 to 5. Panama readings are satellite estimates for each region; the San Francisco reading is from a buoy in the ocean.

San Francisco Bay

California · NOAA buoy 46026, 18 nm west of San Francisco

Water temperature at NOAA buoy 46026, last five days

Bocas del Toro: sea temperature history

Two-year sea temperature and heat stress, Bocas del Toro
Last two years: sea-surface temperature (blue), the bleaching threshold, and heat stress. Source: NOAA Coral Reef Watch.
Sea temperature since 1985, Bocas del Toro
Since 1985: the long-term record. Source: NOAA Coral Reef Watch.
Last four weeks at STRI's Bocas del Toro station
Last four weeks, measured in the water at STRI's Bocas del Toro Research Station — our research partner.
Last 24 hours at STRI's Bocas del Toro station
Last 24 hours at the STRI Bocas station.

STRI Bocas del Toro physical monitoring ↗

Gulf of Chiriquí & Coiba: sea temperature history

Two-year sea temperature and heat stress, Gulf of Chiriquí & Coiba
Last two years: sea-surface temperature (blue), the bleaching threshold, and heat stress. Source: NOAA Coral Reef Watch.
Sea temperature since 1985, Gulf of Chiriquí & Coiba
Since 1985: the long-term record. Source: NOAA Coral Reef Watch.

Gulf of Panama: sea temperature history

Two-year sea temperature and heat stress, Gulf of Panama
Last two years: sea-surface temperature (blue), the bleaching threshold, and heat stress. Source: NOAA Coral Reef Watch.
Sea temperature since 1985, Gulf of Panama
Since 1985: the long-term record. Source: NOAA Coral Reef Watch.

San Francisco Bay: sea temperature history

Water temperature, last five days, buoy 46026

Loading the NOAA temperature graph…

Last five days at NOAA buoy 46026 (°F); times shown in GMT.

Year-by-year records for this buoy go back to 1982: NOAA historical data ↗

News

Climate & ocean reading

More News
Ocean heatwaves are hiding months of extra warming
OceanVirginia Institute of Marine Science

Ocean heatwaves are hiding months of extra warming

Research across 20 U.S. estuaries found that unusually warm periods before and after marine heatwaves can add substantial heat exposure. Measuring duration as well as peak temperature helps scientists assess ecosystem stress.

Read the original ↗

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The HERO newsletter

A closer look, every two months.

Field updates, environmental stories and new ways to learn and take action.