Ocean Health Index

open data science tools and resources

for marine science and management

What is the Ocean Health Index?

The Ocean Health Index ('OHI') is a scientific framework used to measure how healthy oceans are. Understanding the state of our oceans is a first step towards ensuring they can continue providing humans benefits now and in the future.

Learn more Download data Visit our overview website oceanhealthindex.org
OHI Flower plot

Where have OHI assessments been done?

We've led global OHI assessments of 220 coastal nations and territories every year since 2012, and also lead OHI assessments at smaller scales.

Additionally, we share code and provide training and support for independent groups interested in leading their own OHI assessments. These are called independent OHI assessments, or 'OHI+ assessments'.

Learn more about OHI+ View all assessments View publications
OHI hex sticker

Open data science for marine science and management

The OHI is transforming the way marine science streamlines with coastal management by leveraging practices and tools from open science and data science. We work openly online and have shared our story in publications and blogs. We teach these practices and tools to groups leading OHI+ assessments.

Better science in less time

How do I get started?

We provide free instruction and software so you can conduct your own OHI+ assessment. There are four phases to the assessment process: Learn, Plan, Conduct, and Inform.

Start your OHI+ assessment now


Fellowship Feature: Reflections on teaching the first cohort of fellows

In 2018, we launched the Ocean Health Index Fellows Program and we (Melanie Frazier and Julie Lowndes) led its first-ever cohort of three Fellows. The Fellows conducted the annual global assessment using our open data science tools and workflows. The Fellows successfully calculated global OHI scores for 2018 while learning important skills that are valuable to the global OHI team, as well as the broader environmental data science community.


Fellowship Feature: Applying data science principles

The Ocean Health index (OHI) is a framework that uses data science principles to measure how sustainably we are using ocean resources. This definition highlights two main points: data science principles and ocean resource management. As an OHI Global Fellow, we were trained on the data science tools and workflows OHI uses to conduct the annual global assessment.

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