The Ocean is Part of the Economy

Between 2014 and 2016, a vast pool of unusually warm water settled across the northeast Pacific, reaching from the Gulf of Alaska to the coast of California. Scientists called it the Blob. At its peak, sea surface temperatures ran several degrees above the long-term average, and the warmth extended well below the surface. The warm water set off the largest toxic algae bloom recorded on the West Coast, and the domoic acid it produced closed the Dungeness crab fishery for much of the 2015 and 2016 season. In the Gulf of Alaska, the Pacific cod population fell by more than two-thirds in under two years, and the fishery built on it eventually closed. Salmon returns weakened along the coast, including in British Columbia. Fishing communities that had organized their livelihoods around predictable seasonal patterns found those patterns had shifted in ways no local decision could address. The cause was an ocean condition. The consequence was economic, immediate, and distributed across communities, processors, and supply chains that had no mechanism for anticipating it.

That sequence, ocean condition producing economic consequence, is not unusual. It is the normal state of affairs. What is unusual is how seldom it appears in economic analysis.

The ocean economy is typically defined as the set of industries that operate on or near the water: fisheries, aquaculture, shipping, ports, offshore energy, coastal tourism, and marine technology. By that definition, the global ocean economy generates somewhere between two and three trillion dollars annually, depending on the methodology. That is a significant number and it represents real activity worth understanding. But it captures only the industries whose connection to the ocean is direct and visible. It does not capture the far larger set of economic activities that depend on ocean systems without being part of the ocean economy in any conventional sense.

The ocean absorbs more than 90 percent of the excess heat that human activity has added to the climate system since the 1970s. Without that absorption, atmospheric temperatures would have risen faster and more severely than anything recorded in the industrial era. The agricultural systems, infrastructure, and human settlement patterns that underpin the global economy were calibrated to a climate that the ocean has been actively moderating. The ocean absorbs roughly a quarter of annual human carbon emissions, slowing the rate of atmospheric accumulation. Ocean circulation systems distribute heat from the tropics toward the poles, regulating the temperature and rainfall patterns that determine where crops grow, where cities are viable, and what infrastructure is worth building. More than three billion people rely on seafood as a significant protein source. Coastal wetlands and coral reefs provide storm protection to shorelines behind them at a scale and cost that engineered alternatives cannot replicate.

None of these functions appear on a balance sheet. No income statement captures the value of stable ocean circulation. No stock exchange lists the ocean's heat absorption capacity as an asset. These are economic functions in every meaningful sense: they support productive activity, reduce costs that would otherwise be incurred, and make possible outcomes that would not otherwise be achievable. The fact that markets do not price them does not make them economically irrelevant. It makes them economically invisible, which is a different and more consequential problem.

Economists use the term ecosystem services to describe the benefits that natural systems provide to human economies. The concept is useful because it frames ecological function in terms that financial analysis can engage with, even if the pricing of those services remains contested and incomplete. For the ocean, the services include climate regulation, carbon sequestration, weather moderation, food production, coastal protection, and the support of biodiversity that underlies the productivity of marine fisheries. Estimates of the total economic value of these services run into the tens of trillions of dollars annually, figures that should be treated as indicative, not precise, but that convey the order of magnitude of what is not currently reflected in how economic decisions are made.

Financial markets are generally effective at pricing things that generate identifiable cash flows. They are less effective at pricing systems that simultaneously support many different activities without generating cash flows of their own. A fishing company can be valued. The fish stock it depends on is harder to value, and the ocean temperature regime that determines the productivity of that stock harder still. A coastal resort can be financed. The coral reef that protects its beach and attracts its guests is not on any balance sheet. A port can issue bonds. The ocean circulation system that moderates the weather in the region the port serves is not a financeable asset under any conventional framework.

This is not a failure of markets in some abstract sense. It is a structural feature of how economic measurement works, and it has practical consequences. When ocean systems are functioning well, the economic value they provide is invisible because it is simply part of the background condition that everything else depends on. When they begin to function less well, the costs appear in insurance claims, fisheries disasters, infrastructure damage, and agricultural disruption, distributed across parties who had no role in producing the underlying change and no mechanism for anticipating it. The marine heatwave that opened this post was not an insurance event in any category that existing products were designed to cover. It was an economic event without a named economic cause.

Blue finance begins with the recognition that this gap between what ocean systems provide and what financial frameworks account for is not incidental. It is structural, and it has consequences for how capital is allocated, how risk is priced, and how long-term investments are designed. If the economy depends on healthy ocean systems, financial decisions that affect those systems are economic decisions, not only environmental ones, and they deserve to be evaluated as such. That reframing is modest in its ambition and significant in its implications. It does not require a new theory of value or a redesigned financial system. It requires that the decisions already being made about capital allocation, risk assessment, and long-term investment take into account the full range of systems those decisions affect.

Economic language implies a self-contained system. GDP rises, companies grow, capital is allocated, markets fluctuate, all of it discussed as though it ran on its own terms. But every dollar of that activity rests on physical systems underneath it. Crops require stable weather. Ports require navigable coastlines. Fisheries require functioning ecosystems. Cities require a climate that stays broadly recognizable from one generation to the next. The ocean sits beneath all of those conditions.

The ocean is not a sector of the economy. It is part of the infrastructure the economy runs on. Most infrastructure is visible: roads, ports, power grids, water systems. The ocean's infrastructure is different. It operates at a scale and depth that places most of it beyond direct observation, and it produces its benefits continuously and without invoice. That invisibility has allowed it to be undervalued in economic analysis for as long as economic analysis has existed. The costs of that undervaluation are growing clearer as the systems themselves come under mounting pressure. Understanding the connection between ocean health and economic performance is the starting point for doing something about it.