All of Earth’s oceans, from the equator to the poles, are a single engine powered by sunlight, driving huge flows of energy, water, life, and raw materials. In The Blue Machine, physicist and oceanographer Helen Czerski illustrates the mechanisms behind this defining feature of our planet, voyaging from the depths of the ocean floor to tropical coral reefs, estuaries that feed into shallow coastal seas, and Arctic ice floes.
Through stories of history, culture, and animals, she explains how water temperature, salinity, gravity, and the movement of Earth’s tectonic plates all interact in a complex dance, supporting life at the smallest scale—plankton—and the largest—giant sea turtles, whales, humankind. From the ancient Polynesians who navigated the Pacific by reading the waves, to permanent residents of the deep such as the Greenland shark that can live for hundreds of years, she introduces the messengers, passengers, and voyagers that rely on interlinked …
All of Earth’s oceans, from the equator to the poles, are a single engine powered by sunlight, driving huge flows of energy, water, life, and raw materials. In The Blue Machine, physicist and oceanographer Helen Czerski illustrates the mechanisms behind this defining feature of our planet, voyaging from the depths of the ocean floor to tropical coral reefs, estuaries that feed into shallow coastal seas, and Arctic ice floes.
Through stories of history, culture, and animals, she explains how water temperature, salinity, gravity, and the movement of Earth’s tectonic plates all interact in a complex dance, supporting life at the smallest scale—plankton—and the largest—giant sea turtles, whales, humankind. From the ancient Polynesians who navigated the Pacific by reading the waves, to permanent residents of the deep such as the Greenland shark that can live for hundreds of years, she introduces the messengers, passengers, and voyagers that rely on interlinked systems of vast currents, invisible ocean walls, and underwater waterfalls.
Most important, however, Czerski reveals that while the ocean engine has sustained us for thousands of years, today it is faced with urgent threats. By understanding how the ocean works, and its essential role in our global system, we can learn how to protect our blue machine. Timely, elegant, and passionately argued, The Blue Machine presents a fresh perspective on what it means to be a citizen of an ocean planet.
The science of oceans with a primary focus on ocean physics. Temperature, salinity, heat, light, sound, mass, pressure. The last third of the book gets more into biology and ecology, though not losing all connection to discussion of physics. All of it fascinating.
The science of oceans with a primary focus on ocean physics. Temperature, salinity, heat, light, sound, mass, pressure. The last third of the book gets more into biology and ecology, though not losing all connection to discussion of physics. All of it fascinating.
A wonderful book about the machine the is the world's oceans.
5 stars
An excellent book about a global machine that people don't often think about: the global ocean. A machine takes in energy and does work, and the author shows how the ocean does that. The ocean takes in the energy of the sun, stores it mainly as heat, and uses it to move water in great currents all over the world. This affects how organisms live, for those at the surface to those living in the depths.
The book starts with showing how the machine works physically. Light from the sun heats the surface, causing evaporation and currents to form as cold water moves in to replace the lost water. The earth's rotation swirls the currents as they move north or south, which are further affected by land masses in their path. The author goes from the equator to the poles, showing how the workings of the machine affect the …
An excellent book about a global machine that people don't often think about: the global ocean. A machine takes in energy and does work, and the author shows how the ocean does that. The ocean takes in the energy of the sun, stores it mainly as heat, and uses it to move water in great currents all over the world. This affects how organisms live, for those at the surface to those living in the depths.
The book starts with showing how the machine works physically. Light from the sun heats the surface, causing evaporation and currents to form as cold water moves in to replace the lost water. The earth's rotation swirls the currents as they move north or south, which are further affected by land masses in their path. The author goes from the equator to the poles, showing how the workings of the machine affect the local conditions in areas.
All of this, of course, affects how organisms will live, by taking advantage of the conditions caused by the machine, whether to move about, eat or to breed. Humans are not exempted, as sailing ships and other early vessels also took advantage of the currents. Reading the currents also allows humans to predict where good fishing ground might be located.
All this human activity has lead to disruptions in the global ecosystem, for marine organisms depend on a predictable machine in order to survive. As an example, whaling lead to a collapse in marine microorganisms because the microorganisms depend on iron to grow, and a major source of iron was whale poop, which is now in short supply. The changing climate has also led to warmer water temperatures and changing currents, which are disrupting the lives of organisms.
In closing, the author offers some thoughts on how to reduce such disruptions. But the major point of the book is to make people more aware of the ocean and the machine that is running in it, and not to treat the oceans as a 'blank spot' that we can all throw our troubles (and refuse) into and not consider the consequences.
