CV > Yannick Agnan
          
environmental biogeochemist
Experience
2018 – 2019 | Policy officer     Chambre d'Agriculture de l'Ariège, Pamiers, France
Mobilization of pesticides in agricultural soils
2016 – 2018 | Assistant professor     | METISPierre and Marie Curie University, Paris, France
Thawing of Arctic soils: control of the trace element dynamics by dissolved organic matter
2014 – 2016 | Postdoctoral researcher     | Desert Research Institute, Reno, NV, USA
Global database of surface–atmosphere exchange of gaseous elemental mercury 
Dynamics of mercury in the continuum atmosphere–snow–soil in the arctic tundra (Toolik Field Station, Alaska) 
Dynamics of greenhouse gases (CO2, CH4) in the arctic tundra (Toolik Field Station, Alaska)
Dynamics of trace elements in snowfall, snowpack, and snowmelt in a forest ecosystem (Sagehen, Sierra Nevada)
NSF / NASA EPSCoR projects
2014 | Policy officer     Institut écocitoyen pour la connaissance des pollutions, Fos-sur-Mer, France
Biomonitoring of air quality by lichens 
Establishment of lichen biomonitoring protocol for participatory science

2010 – 2013 | Ph.D. candidate     | EcoLab, Toulouse, France
Bioaccumulation and bioindication by lichens of the current and historical atmospheric pollution  by metals and nitrogen in France: sources, mechanisms, and influencing factors
French Environmental Agency (Ademe) project

Qualifications
2013 | Ph.D. Evironmental biogeochemistry     | EcoLab, INPT-ENSAT, Toulouse, France
2010 | M.Sc. Environmental geosciences     | Université Paul Sabatier, Toulouse, France
2007 | B.Sc. Biology and geology     | Université Paul Sabatier, Toulouse, France
2003 | High school diploma Scientific
Publications
(12) Agnan Y., Douglas T.A., Helmig D., Hueber J., Obrist D. (2018). Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace–gas exchanges. The Cryosphere, 12 (6): 1939–1956, doi: 10.5194/tc-12-1939-2018
(11) Dauphin C.-E., Dron J., Austruy A., Agnan Y., Granier V., Chamaret P. (2018). Participation de citoyens volontaires de la population locale dans les mesures de la qualité de l’air autour de la zone industrielle de Fos-sur-Mer. Pollution Atmosphérique 236, doi: 10.4267/pollution-atmospherique.6502
(10) Obrist D., Agnan Y., Jiskra M., Olson C.L., Colegrove D.P., Hueber J., Moore C.W., Sonke J.E., Helmig D. (2017). Tundra uptake of atmospheric elemental mercury drives Arctic mercury pollution. Nature 547: 201–204, doi: 10.1038/nature22997
(9) Agnan Y., Probst A., Séjalon-Delmas N. (2017). Evaluation of lichen species resistance to atmospheric metal pollution by coupling diversity and bioaccumulation approaches: a new bioindication scale for French forested areas. Ecological Indicators 72: 99–110, doi: 10.1016/j.ecolind.2016.08.006
(8) Ayari J., Agnan Y., Charef A. (2016). Spatial assessment and source identification of trace metal pollution in stream sediments of Oued El Maadene basin, northern Tunisia. Environmental Monitoring and Assessment 188 (7): 397, doi: 10.1007/s10661-016-5402-4
(7) Dron J., Austruy A., Agnan Y., Ratier A., Chamaret P. (2016). Utilisation de la biosurveillance lichénique sur la zone industrialo-portuaire de Fos-sur-Mer : retour sur trois ans de suivi à l'échelle d'un territoire intercommunal. Pollution Atmosphérique 228, doi: 10.4267/pollution-atmospherique.5392
(6) Agnan Y., Le Dantec T., Moore C.W., Edwards G.C., Obrist D. (2016). New constraints on terrestrial surface-atmosphere fluxes of gaseous elemental mercury using a global database. Environmental Science & Technology 50 (2): 507–524, doi: 10.1021/acs.est.5b04013 [front cover feature]
(5) Agnan Y., Séjalon-Delmas N., Claustres A., Probst A. (2015). Investigation of spatial and temporal metal atmospheric deposition in France through lichen and moss bioaccumulation over one century. Science of the Total Environment 529: 285–296, doi: 10.1016/j.scitotenv.2015.05.083
(4) Gandois L., Agnan Y., Leblond S., Séjalon-Delmas N., Le Roux G., Probst A. (2014). Use of geochemical signatures, including rare earth elements, in mosses and lichens to assess spatial integration and the influence of forest environment. Atmospheric Environment 95: 96–104, doi: 10.1016/j.atmosenv.2014.06.029
(3) Agnan Y., Séjalon-Delmas N., Probst A. (2014). Origin and distribution of rare earth elements in various lichen and moss species over the last century in France. Science of the Total Environment 487: 1–12, doi: 10.1016/j.scitotenv.2014.03.132
(2) Agnan Y., Séjalon-Delmas N., Probst A. (2013). Comparing early twentieth century and present-day atmospheric pollution in S-W France: a story of lichens. Environmental Pollution 172: 139–148, doi: 10.1016/j.envpol.2012.09.008
(1) Civeyrel L., Leclercq J., Demoly J.-P., Agnan Y., Quèbre N., Pélissier C., Otto T. (2011). Molecular systematics, character evolution, and pollen morphology of Cistus and Halimium (Cistaceae). Plant Systematics and Evolution 295: 23–54, doi: 10.1007/s00606-011-0458-7
Proceedings
(3) Hedge C., Obrist D., Agnan Y., Moore C.W., Biester H., Jiskra M., Helmig D. (2016). Soil and plant mercury dynamics in the arctic tundra. In Proceedings of the 18th International Conference on Heavy Metals in the Environment, Ghent, 12–15 Sep. 2016
(2) Agnan Y., Crews J., Hedge C., Pearson C., Hoberg J., Obrist D. (2016). Canopy influence on trace metal dynamics of snowfall, snowpack, and snowmelt. In Proceedings of the 18th International Conference on Heavy Metals in the Environment, Ghent, 12–15 Sep. 2016
(1) Agnan Y., Séjalon-Delmas N., Claustres A., Probst A. (2013). Large-scale atmospheric contribution of trace elements registered in foliose lichens in remote French areas. In Proceedings of the 16th International Conference on Heavy Metals in the Environment, Rome, 23–27 Sep., 2012, volume 1
International
conferences
(32) Obrist D.*, Howard D., Jiskra M., Khan T.R., Agnan Y., Perlinger J.A. (2018). Gaseous deposition of atmospheric elemental mercury in ecosystems – what we know and what is missing. NADP Scientific Symposium Fall Meeting, Albany, Nov. 5–9, 2018 (invited)
(31) Agnan Y.*, Alexis M.A., Castrec-Rouelle M. (2018). Dynamics of trace elements in the Arctic: role of soil organic matter. European Conference on Permafrost, Chamonix, Jun. 23–Jul. 1, 2018 (poster)
(30) Howard D.*, Agnan Y., Helmig D., Edward G.C., Richter L., Obrist D. (2018). Wintertime contributions to annual carbon exchange budgets in a high Arctic tundra ecosystem. Conference on Agricultural and Forest Meteorology, Boise, May 14–18, 2018 (poster)
(29) Alexis M.A., Agnan Y.*, Castrec-Rouelle M., Courault R., Anquetil C., Derenne S. (2017). Characterization of the dissolved organic matter from arctic soils under climate change. Goldschmidt, Paris, Aug. 13–18, 2017 (poster)
(28) Agnan Y.*, Alexis M.A., Castrec-Rouelle M., Anquetil C., Obrist D., Derenne S. (2017). Thawing of Arctic soils: control of trace element dynamics by organic matter. Goldschmidt, Paris, Aug. 13–18, 2017 (oral)
(27) Jiskra M.*, Sonke J., Obrist D., Agnan Y., Hedge C., Moore C.W., Paxton D., Hueber J., Helmig D. (2017). A mercury isotope study on terrestrial – atmosphere mercury exchange in the Arctic tundra. International Conference on Mercury as a Global Pollutant, Providence, Jul. 16–21, 2017 (oral)
(26) Hedge C.*, Agnan Y., Jiskra M., Moore C.W., Biester H., Obrist D. (2017). Hg storage and mobility in Arctic tundra ecosystems of northern Alaska. International Conference on Mercury as a Global Pollutant, Providence, Jul. 16–21, 2017 (oral)
(25) Obrist D.*, Agnan Y., Jiskra M., Paxton D., Hedge C., Hueber J., Moore C.W., Sonke J., Helmig D. (2017). A mass balance of atmospheric mercury deposition in the Arctic tundra: gaseous elemental mercury uptake drives a globally-important mercury sink. International Conference on Mercury as a Global Pollutant, Providence, Jul. 16–21, 2017 (oral)
(24) Howard D.*, Agnan Y., Harvey A., Yang Y., Obrist D. (2017). Investigating greenhouse gas fluxes from tundra soils during freeze and thaw cycles using GC-MS flux chambers. Toolik Field Station Science meeting, Portland, Jan. 27–28, 2017 (poster)
(23) Obrist D.*, Agnan Y., Hedge C., Moore C.W., Helmig D., Hueber J., Paxton D. (2016). Two-year record of trace gas (CO2, CH4, O2, and Hg0) concentrations and dynamics in arctic tundra soils of northern Alaska: non-linear temperature controls and impacts of diffusivity. American Geophysical Union Fall Meeting, San Francisco, Dec. 12–16, 2016 (oral)
(22) Khan T.R.*, Agnan Y., Obrist D., Perlinger J.A. (2016). Improvements in mercury atmosphere–surface exchange parameterizations for incorporation into chemical transport models. American Geophysical Union Fall Meeting, San Francisco, Dec. 12–16, 2016 (poster)
(21) Hedge C.*, Obrist D., Agnan Y., Moore C.W., Biester H., Jiskra M., Helmig D. (2016). Soil and plant mercury dynamics in the arctic tundra. International Conference on Heavy Metals in the Environment, Ghent, Sep. 12–15, 2016 (oral)
(20) Agnan Y., Crews J., Hedge C.*, Pearson C., Hoberg J., Obrist D. (2016). Canopy influence on trace metal dynamics of snowfall, snowpack, and snowmelt. International Conference on Heavy Metals in the Environment, Ghent, Sep. 12–15, 2016 (poster)
(19) Agnan Y., Edwards G., Obrist D.* (2016). Methane emissions throughout the year in arctic tundra, northern Alaska. Goldschmidt, Yokohama, Jun. 26–Jul. 1, 2016 (poster)
(18) Obrist D.*, Agnan Y., Zheng W., Bergquist B., Helmig D. (2016). Terrestrial mercury biogeochemistry: a need to constrain the role of dry deposition of elemental mercury. Goldschmidt, Yokohama, Jun. 26–Jul. 1, 2016 (oral)
(17) Agnan Y.*, Obrist D., Edwards G., Moore C.W., Hedge C., Helmig D., Paxton D., Hueber J. (2015). Spatial and temporal variability of methane mole fractions and exchanges in and between soil, snow, and the atmosphere in a tundra system in northern Alaska. American Geophysical Union Fall Meeting, San Francisco, Dec. 14–18, 2015 (poster)
(16) Obrist D., Helmig D., Agnan Y.*, Hedge C., Moore C.W., Paxton D., Hueber J. (2015). Mercury dynamics of a tundra ecosystem in northern Alaska and feedback controls on atmospheric concentrations. American Geophysical Union Fall Meeting, San Francisco, Dec. 14–18, 2015 (oral)
(15) Moore C.W.*, Steffen A., Dastoor A., Nghiem S. V., Agnan Y., Obrist D. (2015). Using existing arctic atmospheric mercury measurements to refine global and regional scale atmospheric transport models. American Geophysical Union Fall Meeting, San Francisco, Dec. 14–18, 2015 (oral)
(14) Hedge C.*, Obrist D., Agnan Y., Moore C.W., Biester H., Helmig D. (2015). Soil and plant mercury concentrations and pools in the Arctic tundra of northern Alaska. American Geophysical Union Fall Meeting, San Francisco, Dec. 14–18, 2015 (oral)
(13) Khan T.R.*, Agnan Y., Obrist D., Selin N., Urban N., Wu S., Perlinger J.A. (2015). Preliminary assessment of mercury atmosphere-surface exchange parameterizations for incorporation into chemical transport models. American Geophysical Union Fall Meeting, San Francisco, Dec. 14–18, 2015 (poster)
(12) Agnan Y.*, Moore C.W., Edwards G., Le Dantec T., Obrist D. (2015). A global analysis of surface-atmosphere exchange of gaseous elemental mercury (Hg0). International Conference on Mercury as a Global Pollutant, Jeju, Jun. 14–19, 2015 (oral)
(11) Obrist D., Helmig D., Agnan Y.*, Hueber J., Hedge C., Moore C.W., Kretzschmar R., Wiederhold I., Biester H., Chow J., Steffen A., Brooks S. (2015). Mercury dynamics of an inland tundra ecosystem in northern Alaska: an attempt for a first mass balance. International Conference on Mercury as a Global Pollutant, Jeju, Jun. 14–19, 2015 (oral)
(10) Hedge C.*, Obrist D., Kretzschmar R., Wiederhold I., Biester H., Chow J., Moore C.W., Agnan Y., Helmig D. (2015). Soil and plant mercury concentrations and pools in the Arctic tundra of northern Alaska. International Conference on Mercury as a Global Pollutant, Jeju, Jun. 14–19, 2015 (oral)
(9) Obrist D.*, Hedge C., Agnan Y., Moore C.W., Helmig D., Hueber J. (2015). Comparisons of terrestrial mercury (Hg) accumulation and dynamics across temperate forests and an Arctic tundra site. AGU-GAC-MAC-CGU Joint Assembly, Montreal, May 1, 2015 (invited)
(8) Agnan Y.*, Moore C.W., Le Dantec T., Obrist D. (2014). A global analysis of surface-atmosphere exchange of gaseous elemental mercury (Hg0). American Geophysical Union Fall Meeting, San Francisco, Dec. 15–19, 2014 (oral)
(7) Obrist D.*, Moore C.W., Le Dantec T., Agnan Y., Pearson C. (2014). Soil mercury sequestration and re-mobilization: importance for the global cycling of mercury. Soil Science Society of America Meeting, Long Beach, Nov. 2–5, 2014 (oral)
(6) Le Dantec T., Agnan Y.*, Obrist D., Moore C.W. (2014). A comprehensive database of global soil-atmosphere flux studies of mercury. Soil Science Society of America Meeting, Long Beach, Nov. 2–5, 2014 (oral)
(5) Agnan Y.*, Séjalon-Delmas N., Probst A. (2013). An historical investigation of atmospheric pollution in France using lichens herbaria. Society for Environmental Geochemistry and Health International Conference, Toulouse, Jul. 8–12, 2013 (oral)
(4) Gandois L.*, Agnan Y., Leblond S., Le Roux G., Séjalon-Delmas N., Probst A. (2013). Biomonitoring of trace metal atmospheric deposition in forest ecosystems by mosses and lichens: relative influence of local environment. Society for Environmental Geochemistry and Health International Conference, Toulouse, Jul. 8–12, 2013 (oral)
(3) Claustres A.*, Agnan Y., Séjalon-Delmas N., Le Roux G., Probst A. (2013). Origin of atmospheric trace elements using rare earth elements and lead isotopes: lichens monitoring in a mountain volcanic area (the Puy-de-Dôme, France). Society for Environmental Geochemistry and Health International Conference, Toulouse, Jul. 8–12, 2013 (poster)
(2) Agnan Y.*, Séjalon-Delmas N., Claustres A., Probst A. (2012). Large-scale atmospheric contribution of trace elements registered in foliose lichens in remote French areas. International Conference on Heavy Metals in the Environment, Rome, Sep. 23–27, 2012 (oral)
(1) Agnan Y.*, Séjalon-Delmas N., Probst A. (2011). Comparing early twentieth century and present-day atmospheric pollution in S-W France: a lichen story. Acid Rain, Beijing, Jun. 15–18, 2011 (oral)
* speaker
National
conferences
(7) Agnan Y.*, Alexis M.A., Kohli A., Pinta L., Anquetil C., Aubry E., Derenne S., Castrec-Rouelle M. (2018). Contrôle de la dynamique des éléments traces par la matière organique dissoute dans les sols arctiques en dégel. 4e Séminaire ResMO, Trégastel, Feb. 4–7, 2018 (oral)
(6) Gandois L.*, Agnan Y., Probst A. (2017). Quel impact et quel devenir des pollutions métalliques en forêt ? 25e Colloque Renecofor, Beaune, Oct. 11–13, 2017 (oral)
(5) Agnan Y.*, Rouelle M., Alexis M.A. (2017). Dégel des sols arctiques : contrôle de la dynamique des éléments traces par la matière organique dissoute. 3e Journée Scientifique Métis, Paris, Jan. 13, 2017 (oral)
(4) Dauphin C.-E.*, Dron J., Austruy A., Agnan Y., Granier V., Chamaret P. (2016). Implication de citoyens volontaires de la population locale dans les mesures de la qualité de l’air autour de la zone indutrielle de Fos-sur-Mer / Étang de Berre. Journées Interdisciplinaires de la Qualité de l'Air, Lille, Feb. 2–3, 2016 (oral)
(3) Dron J.*, Austruy A., Agnan Y., Giraudeau P., Chamaret P. (2014). Utilisation de la biosurveillance lichénique sur la zone industrialo-portuaire de Fos-sur-Mer : retour sur trois ans de suivi à l'échelle d'un territoire intercommunal. Workshop APPA, Lille, Oct. 13–14, 2014 (oral)
(2) Agnan Y.* (2014). Les lichens : témoins de la pollution atmosphérique actuelle et passée. 22e Colloque Cataenat, Quillan, Apr. 9–10, 2014 (oral)
(1) Agnan Y.*, Séjalon-Delmas N., Probst A. (2011). Are lichens good indicators of present-day and past atmospheric pollution of metals? Journée Écologie Toulouse, Toulouse, Nov. 11, 2011 (oral)
* speaker
Teaching
Geosciences. Atmosphere sciences / Oceanography / Hydrology / Paleoclimatology / Paleoenvironments / Mineralogy / Energy and environment
Biogeochemistry. Biogeochemical cycles / Geochemistry of natural waters
Soil sciences. Soil biology / Soil physicochimistry / Sol, landscape, and environment
Field trip. Hydrology, hydrogeology and geochemistry / Soil sciences
Project management. Sewage sludge management / Geothermal energy
Lichenology. Identification of lichen species
Environmental chemistry. Introduction to pollutants
Award
2014 | Prix Léopold Escande for doctoral dissertation (Institut National Polytechnique de Toulouse)
Scientific
evaluation
Environmental Science & Technology
Science of the Total Environment
Environmental Pollution
Chemosphere
Biogeosciences
Environmental Science and Pollution Research
Chemical Geology
Ecological Indicators
Environmental Research
Ecological Engineering
Ecotoxicology and Environmental Safety
Atmospheric Pollution Research

Scientific
popularization
Mar. 2018 | Polar week (Paris, France)
Environmental consequences of permafrost thawing

Oct. 2014 | Futura-Science
Lichens: witness of atmospheric pollution

2012 – 2014 | Association
Les étoiles brillent pour tous

Sep. 2010 | Nuit des chercheurs (Toulouse, France)
Biogeochemistry: peat bogs and lichens

Media
Mar. 8, 2018 | La Libre Belgique [journal]
Le sous-sol de l’Arctique gavé de mercure

Dec. 18, 2017 | Scientific American [online]
Mercury from industrialized nations is polluting the Arctic

Aug. 16, 2017 | Le Figaro [journal]
La toundra, passeur de mercure pour l'océan Arctique

Jul. 30, 2017 | La Croix [online]
La toundra stocke le mercure atmosphérique avant de le relâcher dans les fleuves et mers arctiques

Jul. 13, 2017 | RTS La 1ère | CQFD [radio]
Quand la toundra sert de passeur

Jul. 12, 2017 | The Washington Post [online]
The Arctic is full of mercury, and scientists think they know how it’s getting there