Discover the wonder, delight, and awe-inspiring majesty of Earth's ocean with Oceanography: Exploring Earth's Final Wilderness. Professor Harold J. Tobin, an ocean scientist who has visited landscapes on the seabed that no human eyes have seen before, takes you on a scientific expedition to fathom the ocean's many mysteries&;amp;-from its shallowest tidal zone to its deepest depths. Requiring no background in science, these 36 intensively illustrated lectures will give you a thorough appreciation for the ocean as a system arguably more intricate and intriguing than the continents themselves.
Oceanography: Exploring Earth's Final Wilderness
Probe the ocean depths in this intriguing course that explores what we know about the world's oceans from the tidal zones to the deepest points on the ocean floor.
Rated 5 out of
5
by
Docrpaul from
Excellent overview of an important subject
This course was an outstanding survey of an increasingly important topic that remains relevant even though it is now 13 years old. I'd really enjoy an update or even a mini course on the impact of the past 13 years of climate change impact since the original course development. Dr. Tobin is not the most dynamic of Great Courses professors, but his calm, measured approach to difficult topics such as natural versus anthropogenic climate change was much appreciated. His willingness to acknowledge the complexities of the resource need/climate change balance lends credibility to his overall argument.
As others have noted, the "ding" accompanying bullet points was annoying, but I suspect that that was a (poor) production decision and not Dr. Tobin's. Please note the feedback and avoid that in future courses. Aside from that minor criticism, this was an outstanding course and I was sorry to see the last lecture end. Bravo!
Date published: 2024-09-15
Rated 5 out of
5
by
Arthur K from
Dr. Harold Tobin - Absolutely Incredible Lecturer
Dr. Tobin is a fabulaous lecturer!. Probably the best I have ever had in all my career of taking courses. This includes the undergraduate courses I took at Brooklyn College where my majors were Mathematics and Physics, my graduate courses at New York Univerity in Applied Mathematics, and all of the many online courses I have done since then, free on YouTube; free or paid for from various learning companies; and other "Great Courses" courses.
I have found the lecturers for nearly all of the "Great Courses" courses to be uniformly excellent. But Dr. Tobin is definitely the best!! (I wonder if he realizes that he looks a lot like the actor Matthew Modine. For example, in the TV series "Stranger Things".)
Date published: 2024-03-24
Rated 5 out of
5
by
Willyd from
Great course - very informative
I have learned a great deal about the ocean and our place in it. When I go out and see the ocean I will have a new understanding of the ocean. I like to go to Oregon and walk along the beach and watch the Columbia River flow into the ocean. I will do my best to protect this vital resource.
Date published: 2024-01-13
Rated 5 out of
5
by
Michael1156 from
Opened my eyes
When I was a college student, there was no oceanography course at my institution in the late 1970s. Or if there was I didn't know about it. This course was an excellent eyeopener for me. Every lecture keep me engaged and the time spent was worth it.
Date published: 2023-12-22
Rated 5 out of
5
by
MeredithS from
My husband and I love this course
We are learning so much from this course that we did not know before, about the relationship between the sea and the land, the sea and the air! We haven't even gotten to the parts about plants and animals yet. Prof. Tobin is an excellent presenter, calm, matter of fact, personable, and very clear, even on the tricky bits.
Date published: 2023-11-10
Rated 5 out of
5
by
RPh68 from
An excellent overview of oceanography.
My daughter is a physical oceanographer who was educated in US and now a senior scientist in Australia. I want to understand how she became so interested in oceanography as I had no education in such subject. This course has given me the tremendous insight as to what she does and why she was interested in this subject matter. She graduated in 2010, and now after 13 years, her study has tremendous impact on the current situation. Thank you for enlighten me with the subject matter. I understand why our weather system is getting more extreme. Professor Tobin explained in well in 2011.
Date published: 2023-08-29
Rated 5 out of
5
by
Lee77 from
Fascinating! and entertaining
I have been working my way through these lectures. There are many! I have found with each lecture I have learned new things, even though I have lived by the ocean most of my life. From the tiniest microorganism to the patterns of the largest physical characteristics topics are covered with expertise mixed with humor and humanity. To take on such a vast topic with scientific facts and personal observation is quite an undertaking. I occasionally review past lectures to make sure I understand and retain what was discussed.I intend on exploring these topics when I am on the water. I would look for more lectures from this professor.
Date published: 2023-05-22
Rated 5 out of
5
by
Paulette234 from
Excellent presentation
Professor Tobin presents a well balanced, progressive lecture format that introduces new material and terminology at a pace easily understood. The content is taught so that important concepts are fully explained, even to a novice in this area. Graphics are used effectively. Most importantly Dr. Tobin does not judge but provides factual information known at this time. Exceptional 36 lectures.
Date published: 2023-04-09
Overview
About
Dr. Harold J. Tobin is Professor in the Department of Earth and Space Sciences and Director of the Pacific Northwest Seismic Network at the University of Washington in Seattle. He earned his B.S. in Geology and Geophysics from Yale University and his Ph.D. in Earth Sciences from the University of California, Santa Cruz. Professor Tobin was named a Best Instructor by students at UW-Madison, and he was elected a Fellow of the Geological Society of America. Among his other honors is NASA's Lyndon B. Johnson Space Center Group Achievement Award for contributions to the astronaut training program. A specialist in marine geology and geophysics, Professor Tobin has spent nearly a year-and-a-half of his life at sea on 10 oceangoing research expeditions. His seagoing work has also included dives to more than a mile below the surface in the submarine Alvin. Since 2004, he has been Chief Scientist for the Integrated Ocean Drilling Program's Nankai Trough Seismogenic Zone Experiment, an ongoing U.S.–Japan collaboration on the causes of submarine earthquakes and tsunami that is the largest scientific ocean drilling project in history. Professor Tobin has published more than 40 papers and articles in scholarly journals, and his work has been featured on television programs as well as in numerous magazine and newspaper articles.
Trailer
01: Diving In-The Ocean Adventure
Begin your study of the ocean from every angle, examining Earth's watery realm in light of geology, biology, chemistry, meteorology, and other fields. In this lecture, survey the extent of the ocean and the approaches that oceanographers take to understanding it.
31 min
02: Explorers, Navigators, Pioneering Scientists
The early explorers of the ocean were interested in charting its islands, dimensions, and resources-and in using it as a highway for trade. Relive the exploits of these mariners, who included Europeans, Chinese, and Polynesians. Only later did scientific exploration of the ocean begin.
33 min
03: Ocean Basics and Ocean Basins
As recently as the 1950s, geologists envisioned the ocean basins as a submerged version of the continents. Explore the topography of the seabed, discovering that it is shaped by geological forces fundamentally different from those on land.
32 min
04: Mapping the Sea-Soundings to Satellites
The ocean floor was once as mysterious as the surface of another planet. Investigate the technologies involved in measuring bathymetry, the undersea counterpart of topography. Weighted ropes and cables for gauging the depth of the sea have given way to sophisticated sonar from ships and radar from satellites.
34 min
05: Habitats-Sunlit Shelves to the Dark Abyss
Take a tour of organisms that live from the shallows to the ocean floor. Learn how to classify ocean zones, and discover the importance of temperature, chemistry, nutrients, light, and other factors for different life forms-from active swimmers to passive floaters and bottom dwellers.
32 min
06: The Spreading Sea Floor and Mid-Ocean Ridges
What made the ocean floor the way it is? Trace the evidence that ocean basins are geologically young and that new oceanic crust is being continually formed at mid-ocean ridges, pushing and rifting continental plates in a process called plate tectonics.
33 min
07: The Plunging Sea Floor and Deep-Sea Trenches
Investigate subduction zones, where oceanic crust plunges beneath an overriding tectonic plate. These margins are associated with deep-sea trenches, earthquakes, tsunamis, and volcanoes. Examine other features, such as hotspots, which are a mid-plate phenomenon that includes the Hawaiian Islands chain.
32 min
08: The Formation of the Earth and Its Ocean
Cover 9 billion years of cosmic history-from the big bang, to the accretion of the sun and planets, to the formation of Earth's oceans 4 billion years ago. The water in the oceans came from water vapor in volcanic eruptions and possibly from comet impacts.
30 min
09: The Early Ocean and the Origins of Life
Explore scenarios for the origin of life, which may have begun around deep-sea hot springs. The oceans have maintained roughly the same conditions over the entire history of life on Earth, even though the sea floor has renewed itself many times over through plate tectonics.
34 min
10: Marine Sediments-Archives of the Ocean
Ocean sediments are like tree rings that can be "read" as a history of the ocean and climate through time. Investigate the different sources of sediments, which range from products of erosion on land, to the remains of sea creatures, to ejecta from asteroid impacts.
31 min
11: Offshore Oil and Gas-Resources and Risks
Learn the origin of petroleum and natural gas deposits, which formed under very specific conditions in marine sediments. As an example of the challenges of oil recovery, survey the technology of deep-water drilling, focusing on the disastrous blow-out in the Gulf of Mexico in 2010.
34 min
12: The Enduring Chemistry of Seawater
Why is the sea salty? Why isn't it getting saltier? Probe these and other mysteries of ocean chemistry, looking at the remarkable stability and uniformity of seawater over time. Also study the role of water and the conjectured role of life in driving plate tectonics.
30 min
13: How the Physics of Water Controls the Ocean
Analyze the surprising properties that keep the ocean liquid and make water the defining physical substance for life. Among them is its ability to retain heat, which has kept Earth in a narrow temperature range hospitable to life for billions of years. Also investigate the propagation of light in water and why the ocean is blue.
32 min
14: Waves-Motion in the Ocean
Chart the dynamics of wind-generated waves, which include almost all ocean waves. See how they form, grow in size, travel for thousands of miles, and then break on shore. The big waves preferred by surfers come from remote regions that have the ocean's stormiest weather.
30 min
15: Rogue Waves and Tsunami
Long considered a mariners' tall tale, abnormally high "rogue" waves are now well documented. Understand the physics of why they form and the yearly toll they take on shipping. Then study tsunami, or seismic sea waves, which are generated when undersea earthquakes displace huge volumes of water, often with catastrophic results.
32 min
16: Tides in Theory and Practice
Tides are caused by the gravitational attraction of the moon and, to a lesser extent, the sun. Learn that the timing and height of tides are far more complex than the daily motions of the moon and sun suggest-due to the influences of coastal features, the Coriolis effect, and other factors.
30 min
17: Marine Life, Energy, and Food Webs
Trace the path of energy and food through oceanic ecosystems, which have a far higher turnover of biomass than the terrestrial equivalents. As a result, most of what grows in the oceans is very quickly consumed. Learn why warm, temperate seas are often nutrient-poor compared with polar waters.
34 min
18: Tiny Plankton-The Most Abundant Life on Earth
Survey some of the many species of plankton, which are passive, floating, and drifting organisms. Microscopic plankton are ubiquitous throughout the oceans and represent all three of the basic biological domains: Archaea, Bacteria, and Eukarya.
31 min
19: Soft-Bodied Life in the Dark, Open Depths
Investigate the soft-bodied organisms that live at great depths and have no skeletons or shells. Little known until recently, this group includes a variety of creatures whose amorphous bodies are often destroyed by nets and who only came to light through studies from submersibles.
33 min
20: Swimming-The Many Fish in the Sea
Contrasting with free-floating plankton, nekton are the ocean's swimmers. In this lecture, study the most numerous nekton-fish-focusing on their streamlining, gills, schooling, and other adaptations. Also, examine mollusks, including the octopus, squid, and nautilus.
34 min
21: Marine Birds, Reptiles, and Mammals
Turn to the nekton among birds, reptiles, and mammals. These feature some of the most magnificent creatures on the planet, including albatrosses, Sooty Shearwaters, sea turtles, manatees, seals, sea lions, whales, and dolphins. Focus on the adaptations that allow them to thrive in marine environments.
34 min
22: Whaling, Fisheries, and Farming the Ocean
Examine the economic exploitation of marine life, beginning with the history of whaling and continuing to the present, when fishing is the only significant source of hunted food. Weigh the alternatives of commercial fishing and mariculture in an era of rapidly declining fish populations.
34 min
23: Where Sea Meets the Land and Why Coasts Vary
Have you ever walked along a beach or stood on a high cliff overlooking the sea and wondered how the land got to be that way? Learn how erosion, deposition, sea-level change, plate tectonics, and other factors have produced the characteristic coastlines of the world.
32 min
24: Where Rivers Meet the Sea - Estuaries and Deltas
River mouths, deltas, tidal inlets, fjords, and enclosed bays are places where freshwater and seawater mix. Explore these complex zones, which are among the most biologically productive ecosystems on Earth. Many marine organisms carry out key parts of their lifecycles in such environments.
30 min
25: Coastal Erosion-Beaches and Sea Cliffs
Coastlines are constantly changing features. Examine what happens when structures are built to halt or reverse the change, especially at a time when sea level is rising. Most human-engineered solutions turn out to be short-term at best, and many have unintended consequences.
31 min
26: Tidal Life, Sea Forests, and Coral Reefs
Begin your survey of the organisms and ecosystems that flourish in the most complex and varied part of the ocean: the benthic zone, or sea bottom. Start in the shallows, where life inhabits a wide range of niches-from the crashing waves of tide pools to placid mudflats.
32 min
27: Deep Bottom Life and Hydrothermal Vents
Continue your investigation of the benthic zone by exploring the deep ocean bottom, where astonishing diversity exists in cold, darkness, and high pressure. Your tour includes sea cucumbers, brittle stars, herds of sea pigs, and the unique community around deep sea vents, which extracts energy from the Earth itself.
32 min
28: Trade Winds-The Circulation of Heat and Wind
Explore another ocean-the ocean of air-which interacts with Earth's seas through the force of wind on water. Investigate the cause of wind patterns such as the trade winds, westerlies, and polar easterlies. Two crucial factors are uneven distribution of heat and the Coriolis effect due to Earth's rotation.
29 min
29: Heavy Weather-Storms and Hurricanes
Gain insight into the world's largest storms by looking at the interaction of ocean, atmosphere, and land, and how it produces nor'easters, monsoons, and hurricanes. Focus on the life cycle of hurricanes-how they form, intensify, and often produce devastating storm surges, as happened during Hurricane Katrina.
34 min
30: The Gulf Stream to Gyres-Vast Surface Currents
Follow the chain of events that initiate surface currents in the ocean. Big currents such as the Gulf Stream are caused mainly by wind friction. The mapping of currents has been aided by incidents such as the accidental spill of thousands of floating bath toys in the Pacific in 1992.
32 min
31: Upwelling, Downwelling, and El Nino
Winds drive surface currents, and together wind and currents set in motion large-scale upwelling and downwelling. Study these patterns and the disturbances that lead to El Niño and La Niña cycles, which cause major disruptions in fisheries and weather.
32 min
32: The Deepest, Slowest River-Polar Bottom Water
While surface currents move a typical water molecule around an ocean basin in a year or two, down deep water circulates much more slowly, taking hundreds to thousands of years to make a circuit. Trace how dense, cold water masses from the polar regions slowly but inexorably move the great bulk of the ocean.
32 min
33: The Ocean and Global Climate
The ocean contains most of the heat in the ocean-atmosphere system, and surface currents distribute it around the planet. Begin your study of the ocean's reaction to increasing carbon dioxide in the atmosphere, which is leading to climate change worldwide.
32 min
34: The Warming, Rising Sea
Learn that one conjectured effect of global warming-the shutting down of the Gulf Stream leading to a new ice age in Europe-is unlikely. But the planet is already on a path to melting glaciers and steadily rising seas, with catastrophic implications for low-lying populated areas.
34 min
35: Marine Pollution-The Impact of Toxins
Turn to the problem of marine pollution, which includes runoff from land and deliberate dumping, in addition to acidification from atmospheric carbon dioxide. Also look at the Great Pacific Garbage Patch, where plastic particles and other debris have concentrated in a rotating mid-ocean current.
34 min
36: The Future Ocean
Finish the course by looking into the future. Constant change will continue to be the state of the ocean, just as it always has been. But humans can promote change for the better in a variety of ways, including using the national park model to establish marine sanctuaries. Learn other choices you can make to help preserve this wonder of the planet.
36 min
