All about Antarctica - Dr. Steve Emslie

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Part XII The Heroic Age

Saison 1 · Épisode 12

dimanche 12 mars 2023 • Durée 12:16

The Heroic Age in Antarctica dates from 1899-1922 when the first men to winter over and conduct scientific research and exploration endured many hardships with some deaths. Besides providing the first scientific studies, photography and even poetry emerged from this period. It also can be defined by the isolation of the men involved, with no outside contact or chance of rescue if things went wrong. Here, I review some of these early expeditions including the first winter over in sea ice with the ship Beligica from Belgium, the first winter over on the continent by Carsten Borchgrevink, and the first attempt at reaching the South Pole by Robert Falcon Scott and Ernest Shackleton.

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Part XIX Antarctica and the Future

Saison 1 · Épisode 19

samedi 11 mars 2023 • Durée 05:02

Throughout this podcast, we have traced the history of Antarctica from its geologic origins, its earliest discovery and the first people to set foot there, to the first research stations and into the modern world. Even though Antarctica has been impacted throughout the past 120 years from research stations, tourism, and external anthropogenic factors such as climate change and pollution, it still remains the most remote and pristine place on earth, an extreme environment so relatively few people visit it. In this final episode, I go over the greatest threats facing Antarctica today, including global warming and sea level rise, and the importance in maintaining the Antarctic Treaty and Antarctica as a world park. It is up to all of us to ensure that Antarctica remains for peaceful purposes only.

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Part XVIII Marine Fisheries and Illegal Fishing

Saison 1 · Épisode 18

samedi 11 mars 2023 • Durée 07:59

Fisheries for fin fish and krill began to increase in Antarctica in the late 1960s and 1970s and by 1982 the krill catch rose to a peak of over 520,000 tons removed. This increased harvest caused concern among scientists in Antarctic Treaty nations that fish and krill stocks would be depleted beyond recovery unless steps were taken to manage these fisheries. Here I discuss measures taken to avoid the loss of critical and keystone marine species in Antarctica with the addition of the Convention for the Conservation of Antarctic Living Marine Resources, or CCAMLR, to the Antarctic Treaty in 1980. This agreement caused treaty nations to conserve an entire marine ecosystem and monitor indicator species that represent the health of that ecosystem. Today, CCAMLR sets quotas for fishery species including krill that help sustain their populations, though many obstacles remain.

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Part XVII Anthropogenic Impacts

Saison 1 · Épisode 17

samedi 11 mars 2023 • Durée 09:38

Although Antarctica is still the most remote and pristine place on earth, there have been many human-caused impacts to this continent and the marine environment around it. These impacts include pollution from research stations, tourism, and introduced species. In this podcast, I discuss these impacts and how they led to the Environmental Protocol in the Antarctic Treaty in 1991. In addition, I give the history of tourism and when the first women are known to have visited the frozen continent. Tourism (ship and air), which has been increasing exponentially since the 1970s, is now controlled by the tourist agencies themselves when the International Association of Antarctic Tour Operators (IAATO) was formed in 1991 to promote safe and environmentally responsible travel to Antarctica. Introduced species still arrive in Antarctica either naturally or from researchers and tourists, but most of these exotic species fail to survive there. I discuss a few of these species that have managed to gain a foothold in Antarctica today, facilitated in part of global warming trends that provide a more suitable habitat for them.

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Part XVI Research Stations and Life in the Cold

Saison 1 · Épisode 16

samedi 11 mars 2023 • Durée 11:05

Research stations in Antarctica must overcome three obstacles: logistics for how to build and maintain them, climate control for comfortable temperatures, and comfort in general for the personnel including space to spread out, quality of food, health and safety, and some leisure time. In this podcast I describe how the first stone and wood huts in the Antarctic used for science and exploration only partially solved these problems and how modern research stations and their designs evolved and developed to the stations we have today. I also discuss some of the constraints and mental fatigue that personnel face when living in cold and darkness in the Antarctic winter.

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Part XV The Antarctic Treaty

Saison 1 · Épisode 15

samedi 11 mars 2023 • Durée 10:36

After the International Geophysical Year of 1957-1958, Antarctica became a focus of scientific research that continues to this day. In 1958, most of Antarctica was under territorial claims by seven nations, with overlapping claims between Britain, Chile, and Argentina leading to conflicts. The U.S. President at the time, Dwight D. Eisenhower, called for claimant nations to hold a series of meetings and work out an agreement so that Antarctica could remain for 'peaceful purposes only'. These meetings led to the Antarctic Treaty of 1959, one of the most successful international treaties every signed. In this podcast I describe events leading up to this treaty and how it helped resolve international disputes. I also describe my own research on why Eisenhower never made a territorial claim for the U.S. in Antarctica, despite pressure at home to do so.

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Part XIV The International Geophysical Year

Saison 1 · Épisode 14

samedi 11 mars 2023 • Durée 10:48

Following Shackleton’s death in 1922 which marked the end of the Heroic Age in Antarctic history, no major expedition occurred to Antarctica until 1928 when a naval aviator, Richard Byrd, ventured south with ambitions to be the first person to fly over the south pole. In this podcast, I provide the history of Byrd's expedition and his research station Little America on the Ross Ice Shelf. In addition, I discuss the territorial claims that were being made for parts of the Antarctic continent by that time and the events leading up to the International Geophysical Year of 1957-1958 when Antarctica became the focus of research with 40 stations established there by 12 nations. The IGY became a turning point in Antarctic history leading to the signing of the Antarctic Treaty in 1959.

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Part XIII Race to the Pole

Saison 1 · Épisode 13

samedi 11 mars 2023 • Durée 14:27

As we enter the heart of the Heroic Age in Antarctica, three men become competitors to be the first person to reach the South Pole: Robert Falcon Scott, Ernest Shackleton, and Roald Amundsen. Scott and Shackleton had a falling out after Scott's Discovery expedition when he blamed Shackleton's illness with scurvy as why they didn't reach the pole at that time. Here I give the history of Shackleton's attempt to reach the pole during his Nimrod expedition in 1907 and when he began emerging as one of the greatest leaders in British history. Then, Scott tries again in his Terra Nova expedition of 1910-1913 but, just after departing England he learns that the Norwegian, Roald Amundsen, was also heading south to try for the pole. The race was on and the events leading up to it, its tragic outcome and mistakes made are described in this podcast.

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Part XI Discovery of Antarctica

Saison 1 · Épisode 11

vendredi 10 mars 2023 • Durée 11:50

Antarctica is a huge continent, over 5 million square miles in size. Yet, it was not until the 1820s that humans first set foot upon it, and not until the first half of the 20th century before it was finally confirmed that it really was one large continent under the ice. Why did it take so long to learn this about Antarctica? In this episode I discuss the earliest explorers who went south in search of a 'lost continent' and the eventual discovery and early scientific expeditions to visit it. Famous navigators including Ferdinand Magellan and Captain James Cook are involved in this history.

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Part X Penguins and Other Seabirds

Saison 1 · Épisode 10

vendredi 10 mars 2023 • Durée 15:01

When the topic of penguins is raised, most people tend to think only about Antarctica as their habitat. However, of the 19 living species only five actually occur in Antarctica and of those, only two are endemic there. In this episode I describe the breeding cycle and adaptations of these species to the cold Antarctic environment. The cold, dry conditions also preserve tissues in ancient deposits which is the subject of my own research in Antarctica. Some of these tissues date as old as 45,000 or more years, but look and feel modern. Other seabirds reviewed here include the endemic snow petrel and my favorite, the south polar skua.

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All about Antarctica – Détails, épisodes et analyse

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All about Antarctica – Détails, épisodes et analyse

Détails du podcast

Classements récents

Apple Podcasts

Spotify

Liens partagés entre épisodes et podcasts

Other1

Qualité et score du flux RSS

Historique des publications

Derniers épisodes publiés

Podcasts et contenus similaires

Podcasts Similaires Basées sur le Contenu

Podcasts Similaires Basées sur le Contenu

Other1

Apple Podcasts

Spotify