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.com
Volume 07
Advances in Crop Science and Technology
ISSN: 2329-8863
Agri 2019
August 15-16, 2019
August 15-16, 2019 | Rome, Italy
14
th
International Conference on
Agriculture & Horticulture
Measurement-model fusion for global total atmospheric deposition
Lorenzo Jesus Labrador
World Meteorological Organization, Switzerland
T
he World Meteorological Organization’s (WMO) Global Atmosphere Watch (GAW) Programme coordinates
high-quality observations of atmospheric composition from global to local scales with the aim to drive high-
quality and high-impact science while co-producing a new generation of products and services.
Exposure to atmospheric ozone is a major factor in crop yield losses in many countries, resulting in billions of US
$ in losses and having implications for future food security. Likewise deposition of excess atmospheric nitrogen
can result in eutrophication of freshwater bodies, with potential impacts on the health of water bodies used for
irrigation. Conversely, agriculture is the single largest contributor of ammonia pollution as well as emitting other
nitrogen compounds, some of which can make it into the atmosphere and be deposited, potentially affecting crops
elsewhere.
To better understand and address the issues posed by deposition of atmospheric pollutants, WMO has a mandate to
produce global maps of wet, dry and total atmospheric deposition for important atmospheric chemicals to enable
research into biogeochemical cycles and assessments of ecosystem, food security and human health effects.
The most suitable scientific approach for this activity is the emerging technique of measurement-model fusion
for total atmospheric deposition. This technique requires global scale measurements of atmospheric trace gases,
particles, precipitation composition and precipitation depth, as well as predictions of the same from global/regional
chemical transport models. The fusion of measurement and model results requires data assimilation and mapping
techniques.
The resulting maps of global total deposition of atmospheric pollutants can provide agriculture and good experts,
as well as policy-makers, an overview of where deposition of atmospheric pollutants will have the largest effects on
agriculture and food production on a global scale.
Recent Publications
1. Schwede, D., Cole, A., Vet, R and Lear, G., Ongoing US-Canada collaboration on nitrogen and sulfur deposition,
EM - A&WMA, June 2019.
2. Wu, Z.Y.; Schwede, D.; Vet, R.; Walker, J.; Shaw, M.; Staebler, R.; Zhang, L. Evaluation and intercomparison of five
North American dry deposition algorithms at a mixed forest site; J. Adv. Mod. Earth Sys. 2018, 10, 1571-1586
3. Kharol, S.K.; Shephard, M.W.; McLinden, C.A.; Zhang, L.; Sioris, C.E.; O’Brien, J.M.; Vet, R.; Cady-Pereira, K.E.;
Hare, E.; Siemons, J.; Krotkov, N.A. Dry deposition of reactive nitrogen from satellite observations of ammonia
and nitrogen dioxide over North America; Geophys. Res. Letts. 2018, 45, 1157-1166.
4. Vet, R.; Artz, R.S.; Carou, S.; Shaw, M.; Ro, C.-U.; Aas, W.; Baker, A.; Bowersox, V.C.; Dentener, F.; Galy-Lacaux,
C.; Hou, A.; Pienaar, J.J.; Gillett, R.; Forti, M.C.; Gromov, S.; Hara, H.; Khodzher, T.; Mahowald, N.M, Nickovic,
S.; Rao, P.S.P.; Reid, N.W., A global assessment of precipitation chemistry and deposition of sulfur, nitrogen, sea
salt, base cations, organic acids, acidity and pH, and phosphorus, Atmospheric Environment, vol. 93, 3–100,
2014 DOI: doi:10.1016/j.atmosenv.2013.10.060
5. Robichaud, A.; Ménard, R.; Zaïtseva, Y.; Anselmo, D. Multipollutant surface objective analyses and mapping of
air quality health index over North America; Air Qual. Atmos. Health 2016, 9 (7), 743-759.
Lorenzo Jesus Labrador, Adv Crop Sci Tech 2019, Volume 07