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Title |
Atmospheric waves and global seismoacoustic observations of the January 2022 Hunga eruption, Tonga |
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2022 |
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Science |
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377 |
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6601 |
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95-100 |
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Abstract |
The 15 January 2022 climactic eruption of Hunga volcano, Tonga, produced an explosion in the atmosphere of a size that has not been documented in the modern geophysical record. The event generated a broad range of atmospheric waves observed globally by various ground-based and spaceborne instrumentation networks. Most prominent was the surface-guided Lamb wave (?0.01 hertz), which we observed propagating for four (plus three antipodal) passages around Earth over 6 days. As measured by the Lamb wave amplitudes, the climactic Hunga explosion was comparable in size to that of the 1883 Krakatau eruption. The Hunga eruption produced remarkable globally detected infrasound (0.01 to 20 hertz), long-range (~10,000 kilometers) audible sound, and ionospheric perturbations. Seismometers worldwide recorded pure seismic and air-to-ground coupled waves. Air-to-sea coupling likely contributed to fast-arriving tsunamis. Here, we highlight exceptional observations of the atmospheric waves. |
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133 |
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yes |
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8487 |
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Title |
Temporal, spatial, and sampling heterogeneities in species distribution modeling. The case study of the data-poor area of the Kerguelen Plateau. |
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Book Chapter |
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Year |
2016 |
Publication |
Scennet |
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1044 |
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Bachelor's thesis |
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yes |
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6840 |
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Author |
Frey, M. M., Winton, H., Savarino, J., Weller, R., and Nasse, J.-M. |
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Title |
New insights into the atmospheric oxidising capacity above the Antarctic Plateau |
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Conference - International - Communication |
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Year |
2018 |
Publication |
SCAR/IASC open science conference 2018, Davos, Switzerland |
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1177 |
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Bachelor's thesis |
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yes |
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7422 |
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Winton, H., Frey, M., Haigh, J., Mulvaney, R., Pyle, J., Savarino, J., Tuckwell, R., Weller, R., and Yang, X. |
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Title |
Air-snow transfer of nitrate in Dronning Maud Land, East Antarctica |
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Book Chapter |
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Year |
2018 |
Publication |
SCAR/IASC open science conference 2018, Davos, Switzerland |
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1177 |
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Bachelor's thesis |
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yes |
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7424 |
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Author |
Di Mauro D., Chambodut A., Schott J.-J., Cafarella L., Bordais P., Agnoletto P. & Di Felice P. |
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Title |
Looking at the Earth's magnetic field dataset from Concordia base (DomeC / Antarctica) |
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Conference - International - Poster |
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Year |
2008 |
Publication |
SCAR/IASC IPY Open Science Conference |
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905 |
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yes |
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Serial |
4959 |
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Author |
O'Toole M., Sergi S., Cotté C., Bost C.A., Guinet C., Weimerskirch H., Hindell M.A., d'Ovidio F. |
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Title |
Tracking ecological hotspots in the Southern Ocean: Antarctic Circumpolar Current as a space-time-trophic conveyer belt |
Type |
Poster |
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Year |
2017 |
Publication |
Scar symposium |
Abbreviated Journal |
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Satellite data analysis has showed that the environment of the open ocean – uniform and homogeneous to our naked eyes – is in fact populated by strongly contrasted physical features, whose lifetime occurs on ecologically relevant spatial and temporal scales. This dynamical landscape has a primary structuring role on marine ecosystems in particular in the pelagic regions. Pinpointing which physical features are the most ecologically relevant, tracking them, and estimating their lifetime and inter-annual variability are a major challenge for ecologists. Here, we combine bio-logging data and advanced multi-satellite diagnostic tools to track pelagic ecological hotspots in the Indian sector of the Southern Ocean. By clustering predator foraging sites according to diet, we identify five regional hotspots. We interpret these regions by pathways of iron and ageing of the ecosystem from primary production to higher trophic organisms. These results are a first step for the scientific basis of a marine protected area (MPA) proposal to the Convention for the Conservation of Antarctic Marine Living Resources (CCAMLR).
(PDF) . Available from: TrackingecologicalhotspotsintheSouthernOceanAntarcticCircumpolarCurrentasaspace-time-trophicconveyerbelt”>https://www.researchgate.net/publication/320510489TrackingecologicalhotspotsintheSouthernOceanAntarcticCircumpolarCurrentasaspace-time-trophicconveyerbelt [accessed Sep 01 2018]. |
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1201 |
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yes |
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7316 |
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Title |
Tides, Rifting and Calving of the Mertz Glacier. |
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Conference - International - Poster |
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2008 |
Publication |
SCAR open science conference |
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Abstract |
SCAR open science conference, St petersburg, Russia, July 2008. |
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1050 |
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yes |
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5248 |
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Title |
Searching for long period transiting exoplanets with ASTEP South at Dome C, Antarctica |
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Book Chapter |
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2020 |
Publication |
SCAR 2020 Open Science Conference (abstract only) |
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Much of our understanding of gas giant exoplanets come from those transiting in front of bright stars at short orbital separations (P ~ 3 days, a ~ 0.05 au). However, these |
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Programme |
1066 |
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Bachelor's thesis |
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yes |
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7807 |
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Two-colour photometry to search for transiting exoplanets with ASTEP at Dome C, Antarctica |
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Communication |
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2020 |
Publication |
Scar 2020 open science conference |
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Dome C in Antarctica provides exceptional conditions for photometry thanks to the continuous night during the Antarctic winter, a high clear sky fraction, low wind speeds, and a cold and dry atmosphere. The ASTEP project (Antarctic Search for Transiting ExoPlanets) aims at detecting and characterising transiting exoplanets and qualifying this site for photometry in the visible. The main instrument, a 40 cm telescope, has been designed to perform high precision photometry under the extreme conditions of the Antarctic winter and has operated at the Concordia station since 2010. It will be upgraded with two new cameras and a new camera box in order to provide simultaneous two-colour photometry and substantially increase its throughput. The new setup will be operational for the winter campaign 2021 and will allow us to discover transiting exoplanets orbiting bright stars in particular low mass exoplanets, temperate exoplanets, exoplanets around young stars, and to refine the ephemerides of exoplanets discovered by the TESS mission. These observations will provide targets for first characterisation with the CHEOPS mission and atmospheric studies with the JWST and ARIEL missions. In this talk, I will describe the science goals and the upgrade of the ASTEP telescope. |
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1066 |
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yes |
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7806 |
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Labonne J., Robin J.-p., Améziane N., Barbraud C., Bétoulle S., Bost C., Boulinier T., Charassin J.-b., Cotté C., Eleaume M., Gallut C., Gaudin P., Guinet C., Hennion F., Koubbi P., Le Bohec C., Lebouvier M., Mazé C., Renault D., Ropert-coudert Y., Saucède T. Et Weimerskirch H. |
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Title |
Implementation of the Long Term Ecological Research network of the French Southern and Antarctic Lands (LTER ZATA “ Zone Atelier Antarctique et Terres Australes”): toward an overall monitoring of the southern ecosystem through its marine and terrestrial communities |
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Peer-reviewed symposium |
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Year |
2020 |
Publication |
SCAR 2020 Online, 3-7 August 2020, oral. actes du colloque |
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Since 2000, the French Long Term Ecological Research network of the French Southern and Antarctic Lands (LTER ZATA “ Zone Atelier Antarctique et Terres Australes”) has endeavoured to monitor the dynamics of biodiversity in Antarctic and sub-Antarctic marine and terrestrial ecosystems. Our LTER encompasses multiple scientific programs and can provide access to long term monitoring of more than 40 marine, freshwater and terrestrial vertebrate species (including 27 bird species), 20 terrestrial and freshwater plant and invertebrate species. For some species, monitoring was initiated well before the 2000s, as earlier as the years 1960-1970. More recently, monitorings have been initiated at the community level for pelagic and coastal marine biota, and were complemented by eco-physiological, eco-epidemiological and stress observing projects focussing on multiple species and communities. The main objective of our LTER is to provide a general dashboard to assess health of southern ecosystems along with the selective pressures and overall resilience due to environmental changes. The French LTER ZATA has strongly benefited from sustained support from the French Polar Institute over decades, clearly linking fundings and resource allocations to our capacity to assess and understand southern ecosystems. In this talk, we will give a first picture of this dashboard based on our existing databases. We will also present future developments and strategies that, for sure, have now to be integrated at the international level. |
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8376 |
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