I am a Senior Lecturer in Quaternary Science at Royal Holloway University of London, specialising in glaciology and glacial geology. I wrote and developed the AntarcticGlaciers.org website as part of an ongoing commitment to outreach, education and research impact. Read more about me at www.antarcticglaciers.org/bethan-davies.
Thwaites Glacier in West Antarctica is currently the focus of a major scientific campaign. Why is Thwaites Glacier of so much interest, however? How much ice is there, and how much would sea levels rise if it all melted?
Glacier is roughly the size of UK (176 x103 km2). The glacier
terminus is nearly 120 km wide, and the bed of the glacier reaches to >1000
m below sea level. Pine Island Glacier and Thwaites Glacier together account
for 3% of grounded ice-sheet area, but they receive 7% of Antarctica’s snowfall1.
The year 2019 concludes a decade of exceptional heat, and is on track to be the second or third warmest year on record. While the global average temperature teeters on 1.1°C above the pre-industrial record, the world’s glaciers are in stark retreat.
In high mountain areas, the steady trickle of melting snow in spring has nourished people for generations. Today, 1.9 billion people – or 22% of the world’s population – live downstream of snowpacks and glaciers and depend on them as their main source of drinking water. These icy and snowbound mountain regions could be considered water towers, which provide a regular supply of water for drinking, irrigation and power generation, and provide a life-saving buffer during droughts.
We are delighted to announce that AntarcticGlaciers.org has been awarded a grant from the Curry Fund of the Geologists’ Association. This will support further website development, and help bring the website further into line with the new UK A-Level curriculum.
The Continent of Antarctica. Julian Dowdeswell and Michael Hambrey.
Antarctica was the last continent to be discovered and explored, and is sensitive and vulnerable to climate change. It is relevant to all of us, since it can influence ocean currents and sea levels. The history of the continent, both geological and human, is fascinating, with heroic attempts to map and explore the continent.
In The Continent of Antarctica, Julian Dowdeswell and Michael Hambrey provide an in-depth overview of the continent of Antarctica, covering the geography and evolution of Antarctica, its people and exploration, and its future. This book, aimed at the interested non-expert reader, is beautifully illustrated with photographs by the authors and provides a detailed introduction to readers illustrated in the Antarctic continent. Throughout the book, personal stories and reflections from the two careers of the authors in Antarctica are used to highlight and enrich key points, and make it engaging throughout.
The language is accessible, but the content is carefully and thoroughly researched. The book is strongly grounded in science, but there are sections on human interaction with Antarctica and geopolitics. Both authors are talented photographers who have been working in Antarctica for decades, with many field seasons between them. This has resulted in a rich archive of photography, used throughout the book. Continue reading →
Here at AntarcticGlaciers.org we have been busy making many updates to the website. We are particularly keen to update the website to bring it in to line with the reformed A-Level syllabus, and also to update and rewrite some of the older content, and improve the website as a resource to promote public understanding of glaciers and climate change.
Since AntarcticGlaciers.org was founded 6.5 years ago, we have undergone substantial improvements and learned a lot over the years. This outreach endeavour, motivated by a desire to publicly communicate the risks that climate change and rising sea levels pose to our world’s glaciers and ice sheets, has evolved into one of the premier sites on this subject. This website aims to inspire both interested adults and also young people and school children with geology and geomorphology, and specifically targets teachers to supply them with engaging, original content that they can use in lesson planning.
We are delighted to announce that we have been awarded an Outreach Grant by the British Society for Geomorphology. These funds will be used to support our attendance and an exhibit at the Geographical Association Annual Conference in April 2019, called “Celebrating Geography”. We hope to use this opportunity to both promote our website but also to interact with teachers and targeted end users of the website, and engage in a dialogue to help us better support Geography Teachers who teach the new AQA A-Level Geography, which has a “Glaciers and Glaciated Landscapes” module.
A new paper with a whole host of authors has just been published in Nature (IMBIE Team, 2018). It provides a new estimate of mass balance of the entire Antarctic Ice Sheet over the last 25 years, the longest and most thorough estimate of this to date.
This article argues that the Antarctic Peninsula, the smallest ice sheet in Antarctica, has lost an average of 20 Gigatonnes (Gt) of ice per year over the 25 year study. This increased during the study and especially since the year 2000. The West Antarctic Ice Sheet lost 53±29 Gt yr-1 from 1992-1997, but this accelerated to 159±26 Gt yr-1 from 2012-2017. The East Antarctic Ice Sheet is more stable, with small gains (with large errors) over the study period. Continue reading →
Having now been lecturing for a few years, I’ve had the opportunity and time to think about what kind of lecturer I want to be. I wrote this down a while ago but decided to share it now – because thinking about and sharing best practice makes us all better teachers, and because ECRs just starting to think about teaching might find it useful.
There is often a lot of doom and gloom in Academia. People discuss the workload, the work-life balance, and the difficulty in taking maternity leave or having a family. For example, this recent piece in The Guardian highlights one professor’s less-than-positive experience of having children as an academic. The Times Higher Ed writes about the leaky pipeline, often attributed to the difficulty in balancing motherhood and an academic career.
However, I believe that, while there are often difficulties, I think there are also reasons to be positive in Academia. In my opinion, in terms of family life, Academia is no worse than, and in many places better than, most other professional careers. There are advantages and disadvantages in an academic career when it comes to family life, but in many ways they are similar to the challenges faced by many professional women across a spectrum of careers. Many of these are societal, rather than academic, issues. I would hate a young, promising academic to be put off just because they only perceive the negative aspects. Continue reading →
The Antarctic Peninsula is fringed by floating ice shelves. They are floating extensions of the glaciers on land, and receive mass by snowfall and marine freeze-on. They lose mass by melting at their base and by calving icebergs. Larsen C Ice Shelf, the largest ice shelf on the Antarctic Peninsula, is currently being closely watched. Following a series of high-profile ice-shelf collapse events on the Antarctic Peninsula over the last few decades, all eyes are watching Larsen C and wondering when, and if, it will collapse.
A growing rift on Larsen C Ice Shelf
Those concerns are growing more acute as a large rift on Larsen C Ice Shelf is growing rapidly, threatening to soon calve a huge iceberg, equivalent to losing 10% of the area of the ice shelf. This could destabilise the ice shelf, making it more susceptible to a total collapse.
Larsen C rift animation uses #Sentinel1 InSAR to illustrate recent jumps in rift progression. From Prof. Adrian Luckman.