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VERSION:2.0
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SUMMARY:EESS talk on "Human driven changes in atmospheric deposition of nu
 trients to the marine ecosystems"
DTSTART:20200225T121500
DTEND:20200225T130000
DTSTAMP:20260408T025911Z
UID:b261b9bcdfcc68d63fae0e26a574e5c59b3dc4d336252d53da7c6c78
CATEGORIES:Conferences - Seminars
DESCRIPTION:Professor Maria Kanakidou\, EPCL Group\, Department of Chemist
 ry\, University of Crete\, Heraklion\nAbstract:\nOceans are responsible fo
 r about half of the oxygen in the atmosphere\, are a major source of food 
 for humanity and without the ocean phytoplankton carbon dioxide in the atm
 osphere would have been about 200 ppm higher. Biological carbon sequestrat
 ion depends on the availability of nutrients to the marine ecosystem\, sin
 ce nutrients are essential for the ecosystem functioning. The relative abu
 ndance of them available to an ecosystem is also important because favorin
 g the development of certain species against others can lead to biodiversi
 ty losses. Nutrients equilibria of both land and marine ecosystems have be
 en disturbed during the Anthropocene period.\nMaterial of natural and/or a
 nthropogenic origin\, particularly aerosols\, deposited from the atmospher
 e to the Earth’s surface can act as a source of nutrients for the ecosys
 tems\, in particular into the open ocean\, and affect nutrient’s equilib
 rium. Atmospheric acidity is a key driver of solubility changes of nutrien
 ts\, making them readily available to the ecosystems\, and is following th
 e human-driven changes in the emissions of acidic and basic compounds into
  the atmosphere (mainly sulfur and nitrogen emissions).\nWe will discuss r
 ecent global chemistry-transport modeling studies that are based on labora
 tory and field experiments focusing on the biogeochemical cycles of nitrog
 en\, iron and phosphorus\, the role of atmospheric acidity and organics\, 
 how these cycles have been impacted by human activities and potential cons
 equences for the ecosystems.\n\nShort biography:\nMaria Kanakidou is Profe
 ssor of Computational Environmental Chemistry (since 2008)\, Director of t
 he Environmental Chemical Processes Laboratory (ECPL) of the Department of
  Chemistry of the University of Crete\, holds an Excellence Chair at the I
 nstitute of Environmental Physics of the University of Bremen (2020-2023) 
 and is also a visiting faculty member at the Institute of Chemical Enginee
 ring Sciences of the Foundation for Research and Technology Hellas\, Patra
 s.\nHer scientific interests focus on human-driven changes and feedbacks o
 n atmospheric chemistry and physics\, biogeochemical cycles and interactio
 ns with climate. She is most known for her global modeling studies of orga
 nics and recently on nutrients (nitrogen\, iron and phosphorus) atmospheri
 c deposition to the ocean.\nShe is recipient of the EGU 2016 Vilhelm Bjerk
 nes Medal for Atmospheric Sciences\, a von Humboldt award (2019)\, the H. 
 Julian Allen Award 1998\, member of the UN/WMO GESAMP WG 38 on 'The Atmosp
 heric Input of Chemicals to the Ocean'\, and honorary member of Internatio
 nal Commission on Atmospheric Chemistry and Global Pollution.\n 
LOCATION:GR A3 30 https://plan.epfl.ch/?room==GR%20A3%2030
STATUS:CONFIRMED
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