Samples from a changing ocean

This field report is made for a desktop screen.

−13.6 mm −16.4 mm −41.5 mm +23.9 mm −21.0 mm −21.5 mm −20.2 mm +17.9 mm +50.3 mm −12.3 mm +37.0 mm +37.7 mm +34.7 mm +22.0 mm +27.3 mm +33.7 mm −28.0 mm −20.7 mm Kiribati Tuvalu Tonga Federated States of Micronesia Vanuatu Samoa Fiji Papua New Guinea Marshall Islands 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Entry 02 /precipitation anomalies

As the Pacific warms, changing ocean–atmosphere interactions influence rainfall patterns across the region. Rainfall is already highly variable, and rainfall variability associated with El Niño–Southern Oscillation is projected to increase, bringing greater swings between wet and dry conditions in the future.

From 2000 to 2025, the visualisation traces these fluctuations across nine Pacific Island countries. Each line follows annual precipitation anomalies, revealing how dramatically rainfall can shift from one year to the next and how differently these changes are experienced across the region. Blue highlights mark each country’s wettest and driest year, while countries are ordered by their largest absolute anomaly [most to least].

Explore the rhythms of rainfall across countries and years, and see how differently the Pacific experiences a changing climate.

How to read:

Country +50 mm

The blue highlight and the value mark the wettest and driest years recorded for each country between 2000 and 2025.

Each line represents 5 mm of precipitation anomaly. Lines above the baseline indicate wetter conditions; lines below indicate drier conditions.

Subregion: Melanesia Micronesia Polynesia