Author: Biogeomod2018

IGEOS seminars 2023-2024

IGEOS seminars 2023-2024

Biogeomod2018

Friday 26th April – 15:30 to 16:30 - ON LINE

"Hypoxia in the Loire estuary: the role of benthic feedbacks in oxygen dynamics"

by Nour BOUKORTT (PhD student UMR, CNRS, University of Angers, France)

 

Friday 3rd May – 15:30 to 16:30 - room SDB4.245

"What lies beneath: organic matter decomposition dynamics in thawing subsea permafrost"

by Constance LEFEBVRE (PhD student, BGEOSYS, ULB)

 

Friday 31st May – 15:30 to 16:30 - room SDB4.245

"Deciphering chondrule recycling during the solar system evolution through relict olivine grains in type II chondrules"

by Dr. Gabriel PINTO (Postdoc, G-Time, ULB)

 

Friday 6th June – 15:30 to 16:30 - room SDB4.245

"Isotopic records from the TALCIDE ice core: a focus on the deeper part"

by Prof. Barbara STENNI (Professor at the University of Venice)

 

PAST 2023-2024 IGEOS SEMINARS:

March 29th 2024 : "Chicsulub and/or Deccan ? New insights into the dinosaur mass extinction" by Dr. Pim Kaskes (Postdoc, G-Time, ULB)

February 23th 2024 :"The explosive Mocho-Choshuenco volcano (Chile): insights from melt inclusions analysis of the sub-Plinian Enco eruption (~1600 BP)" by Dr. Jean-Guillaume Feignon (Postdoc, VUB)

February 2th 2024 :"Mapping and Applications of Surface Ice Flow Velocity on the Antarctic Ice Sheet During the 1960s-1980s Based on Remote Sensing Data" by Prof. Gang Qiao (Tongji University, China)

January 26th 2024 : "Harnessing the Earth's vibrations towards monitoring explosive volcanoes" by Dr. Alec Yates (Postdoc, G-Time, ULB)

November 24th 2023: "Blowing bubbles : How listening to bubbles could save lives" by Dr. Ben Roche (G-TIME, ULB)

October 20th 2023: "Atmospheric dust : the connecting agent of Earth System" by Prof. Steeve Bonneville (BGEOSYS, ULB)

COP28 Global Tipping Points Report

COP28 Global Tipping Points Report

Biogeomod2018

Sandra Arndt contributed to the cryosphere-permafrost section of the Global Tipping Points Report presented at COP28.

Pivotal moment for humanity as tipping point threats and opportunities accelerate

The world has reached a pivotal moment as threats from Earth system tipping points – and progress towards positive tipping points – accelerate, a new report shows.

The Global Tipping Points Report – the most comprehensive assessment of tipping points ever conducted – says humanity is currently on a disastrous trajectory.

The speed of fossil fuel phase out and growth of zero-carbon solutions will now determine the future of billions of people.

The report says current global governance is inadequate for the scale of the challenge and makes six key recommendations to change course fast, including coordinated action to trigger positive tipping points.

Link to the complete press release HERE

Mushrooms are older than we thought ! “Science Advances”

Mushrooms are older than we thought ! “Science Advances”

Biogeomod2018

New publication in Science Advances

A new study led by Steeve Bonneville from the Université libre de Bruxelles, shows that the first mushrooms were already present on Earth between 715 and 810 million years ago, 300 million years earlier than the scientific community had believed until now. The results, published in Science Advances, also suggest that mushrooms could have been important partners for the first plants that colonized the continental surface.

Link to the article: Molecular identification of fungi microfossils in a Neoproterozoic shale rock (2020) Bonneville S., F. Delpomdor, A. Préat, C. Chevalier, T. Araki, M. Kazemian, A. Steele, A. Schreiber, R. Wirth and L. G. Benning, Science Advances, Vol. 6, no. 4, doi:10.1126/sciadv.aax7599.

Link to the official press release

Link to National Geographic article

Link to RTBF TV-reportage

Nature Communications October 2019

Nature Communications October 2019

Biogeomod2018

Unexpected large evasion fluxes of carbon dioxide from turbulent streams draining the world’s mountains


Horgby Å., Luigi Segatto P., Bertuzzo E., Lauerwald R., Lehner B., Ulseth A.J., Vennemann T.W. and Battin T.J.

Nature Communications 10, article 4888 (2019), https://www.nature.com/articles/s41467-019-12905-z

Abstract

Inland waters, including streams and rivers, are active components of the global carbon cycle. Despite the large areal extent of the world’s mountains, the role of mountain streams for global carbon fluxes remains elusive. Using recent insights from gas exchange in turbulent streams, we found that areal CO2 evasion fluxes from mountain streams equal or exceed those reported from tropical and boreal streams, typically regarded as hotspots of aquatic carbon fluxes. At the regional scale of the Swiss Alps, we present evidence that emitted CO2 derives from lithogenic and biogenic sources within the catchment and delivered by the groundwater to the streams. At a global scale, we estimate the CO2 evasion from mountain streams to 167 ± 1.5 Tg C yr−1, which is high given their relatively low areal contribution to the global stream and river networks. Our findings shed new light on mountain streams for global carbon fluxes.