Articles | Volume 11, issue 11
https://doi.org/10.5194/bg-11-3069-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-11-3069-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
12 Jun 2014
Research article |
| 12 Jun 2014
Seasonal trends of dry and bulk concentration of nitrogen compounds over a rain forest in Ghana
F. Fattore
DiSTABiF, Seconda Università degli Studi di Napoli, Via A. Vivaldi, 43, 81100 Caserta, Italy
T. Bertolini
CMCC, Via A. Imperatore, 16, 73100, Lecce, Italy
S. Materia
CMCC, Via A. Imperatore, 16, 73100, Lecce, Italy
S. Gualdi
CMCC, Via A. Imperatore, 16, 73100, Lecce, Italy
INGV, Via D. Creti, 12, 40128, Bologna, Italy
A. Thongo M'Bou
CMCC, Via A. Imperatore, 16, 73100, Lecce, Italy
G. Nicolini
CMCC, Via A. Imperatore, 16, 73100, Lecce, Italy
DIBAF, Università della Tuscia, Via San Camillo de Lellis, 01100 Viterbo, Italy
R. Valentini
CMCC, Via A. Imperatore, 16, 73100, Lecce, Italy
DIBAF, Università della Tuscia, Via San Camillo de Lellis, 01100 Viterbo, Italy
A. De Grandcourt
CMCC, Via A. Imperatore, 16, 73100, Lecce, Italy
D. Tedesco
DiSTABiF, Seconda Università degli Studi di Napoli, Via A. Vivaldi, 43, 81100 Caserta, Italy
S. Castaldi
DiSTABiF, Seconda Università degli Studi di Napoli, Via A. Vivaldi, 43, 81100 Caserta, Italy
CMCC, Via A. Imperatore, 16, 73100, Lecce, Italy
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EGUsphere, https://doi.org/10.5194/egusphere-2026-3465, https://doi.org/10.5194/egusphere-2026-3465, 2026
This preprint is open for discussion and under review for Atmospheric Measurement Techniques (AMT).
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Accurate measurements of carbon dioxide and water vapour exchanges are essential for understanding climate change. Using data from 38 European observation sites, we compared two commonly used correction methods and found that one provides more robust and consistent results, especially for water vapour. The study also revealed differences with current network processing procedures, highlighting opportunities to improve the reliability of long-term ecosystem observations.
Monalisa Sahoo, Stefano Materia, and Markus G. Donat
EGUsphere, https://doi.org/10.5194/egusphere-2026-3206, https://doi.org/10.5194/egusphere-2026-3206, 2026
This preprint is open for discussion and under review for Hydrology and Earth System Sciences (HESS).
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Arnau Garcia Mesa, Lluís Palma, Markus Donat, Stefano Materia, and Raül Marcos Matamoros
EGUsphere, https://doi.org/10.5194/egusphere-2025-5392, https://doi.org/10.5194/egusphere-2025-5392, 2025
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Olivier Bouriaud, Ernst-Detlef Schulze, Konstantin Gregor, Issam Boukhris, Peter Högberg, Roland Irslinger, Phillip Papastefanou, Julia Pongratz, Anja Rammig, Riccardo Valentini, and Christian Körner
Biogeosciences, 22, 4729–4741, https://doi.org/10.5194/bg-22-4729-2025, https://doi.org/10.5194/bg-22-4729-2025, 2025
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Tuula Aalto, Aki Tsuruta, Jarmo Mäkelä, Jurek Müller, Maria Tenkanen, Eleanor Burke, Sarah Chadburn, Yao Gao, Vilma Mannisenaho, Thomas Kleinen, Hanna Lee, Antti Leppänen, Tiina Markkanen, Stefano Materia, Paul A. Miller, Daniele Peano, Olli Peltola, Benjamin Poulter, Maarit Raivonen, Marielle Saunois, David Wårlind, and Sönke Zaehle
Biogeosciences, 22, 323–340, https://doi.org/10.5194/bg-22-323-2025, https://doi.org/10.5194/bg-22-323-2025, 2025
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Wetland methane responses to temperature and precipitation were studied in a boreal wetland-rich region in northern Europe using ecosystem models, atmospheric inversions, and upscaled flux observations. The ecosystem models differed in their responses to temperature and precipitation and in their seasonality. However, multi-model means, inversions, and upscaled fluxes had similar seasonality, and they suggested co-limitation by temperature and precipitation.
Jacob A. Nelson, Sophia Walther, Fabian Gans, Basil Kraft, Ulrich Weber, Kimberly Novick, Nina Buchmann, Mirco Migliavacca, Georg Wohlfahrt, Ladislav Šigut, Andreas Ibrom, Dario Papale, Mathias Göckede, Gregory Duveiller, Alexander Knohl, Lukas Hörtnagl, Russell L. Scott, Jiří Dušek, Weijie Zhang, Zayd Mahmoud Hamdi, Markus Reichstein, Sergio Aranda-Barranco, Jonas Ardö, Maarten Op de Beeck, Dave Billesbach, David Bowling, Rosvel Bracho, Christian Brümmer, Gustau Camps-Valls, Shiping Chen, Jamie Rose Cleverly, Ankur Desai, Gang Dong, Tarek S. El-Madany, Eugenie Susanne Euskirchen, Iris Feigenwinter, Marta Galvagno, Giacomo A. Gerosa, Bert Gielen, Ignacio Goded, Sarah Goslee, Christopher Michael Gough, Bernard Heinesch, Kazuhito Ichii, Marcin Antoni Jackowicz-Korczynski, Anne Klosterhalfen, Sara Knox, Hideki Kobayashi, Kukka-Maaria Kohonen, Mika Korkiakoski, Ivan Mammarella, Mana Gharun, Riccardo Marzuoli, Roser Matamala, Stefan Metzger, Leonardo Montagnani, Giacomo Nicolini, Thomas O'Halloran, Jean-Marc Ourcival, Matthias Peichl, Elise Pendall, Borja Ruiz Reverter, Marilyn Roland, Simone Sabbatini, Torsten Sachs, Marius Schmidt, Christopher R. Schwalm, Ankit Shekhar, Richard Silberstein, Maria Lucia Silveira, Donatella Spano, Torbern Tagesson, Gianluca Tramontana, Carlo Trotta, Fabio Turco, Timo Vesala, Caroline Vincke, Domenico Vitale, Enrique R. Vivoni, Yi Wang, William Woodgate, Enrico A. Yepez, Junhui Zhang, Donatella Zona, and Martin Jung
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Colin G. Jones, Fanny Adloff, Ben B. B. Booth, Peter M. Cox, Veronika Eyring, Pierre Friedlingstein, Katja Frieler, Helene T. Hewitt, Hazel A. Jeffery, Sylvie Joussaume, Torben Koenigk, Bryan N. Lawrence, Eleanor O'Rourke, Malcolm J. Roberts, Benjamin M. Sanderson, Roland Séférian, Samuel Somot, Pier Luigi Vidale, Detlef van Vuuren, Mario Acosta, Mats Bentsen, Raffaele Bernardello, Richard Betts, Ed Blockley, Julien Boé, Tom Bracegirdle, Pascale Braconnot, Victor Brovkin, Carlo Buontempo, Francisco Doblas-Reyes, Markus Donat, Italo Epicoco, Pete Falloon, Sandro Fiore, Thomas Frölicher, Neven S. Fučkar, Matthew J. Gidden, Helge F. Goessling, Rune Grand Graversen, Silvio Gualdi, José M. Gutiérrez, Tatiana Ilyina, Daniela Jacob, Chris D. Jones, Martin Juckes, Elizabeth Kendon, Erik Kjellström, Reto Knutti, Jason Lowe, Matthew Mizielinski, Paola Nassisi, Michael Obersteiner, Pierre Regnier, Romain Roehrig, David Salas y Mélia, Carl-Friedrich Schleussner, Michael Schulz, Enrico Scoccimarro, Laurent Terray, Hannes Thiemann, Richard A. Wood, Shuting Yang, and Sönke Zaehle
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Dario Nicolì, Alessio Bellucci, Paolo Ruggieri, Panos J. Athanasiadis, Stefano Materia, Daniele Peano, Giusy Fedele, Riccardo Hénin, and Silvio Gualdi
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Decadal climate predictions, obtained by constraining the initial condition of a dynamical model through a truthful estimate of the observed climate state, provide an accurate assessment of the near-term climate and are useful for informing decision-makers on future climate-related risks. The predictive skill for key variables is assessed from the operational decadal prediction system compared with non-initialized historical simulations so as to quantify the added value of initialization.
Enrico Scoccimarro, Daniele Peano, Silvio Gualdi, Alessio Bellucci, Tomas Lovato, Pier Giuseppe Fogli, and Antonio Navarra
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Geosci. Model Dev., 14, 4465–4494, https://doi.org/10.5194/gmd-14-4465-2021, https://doi.org/10.5194/gmd-14-4465-2021, 2021
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The subseasonal prediction of extreme hydroclimate events such as droughts/floods has remained stubbornly low for years. This paper presents a new international initiative which, for the first time, introduces spring land surface temperature anomalies over high mountains to improve precipitation prediction through remote effects of land–atmosphere interactions. More than 40 institutions worldwide are participating in this effort. The experimental protocol and preliminary results are presented.
Cited articles
Adon, M., Galy-Lacaux, C., Yobouè, V., Delon, C., Lacaux, J.P., Castera, P., Gardrat, E., Pienaar, J., Al Ourabi, H., Laouali, D., Diop, B., Sigha-Nkamdjou, L., Akpo, A., Tathy., J.P., Lavenu, F., and Mougin, E.: Long term measurements of sulfur dioxide, nitrogen dioxide, ammonia, nitric acid and ozone in Africa using passive samplers, Atmos. Chem. Phys., 10, 7467–7487, https://doi.org/10.5194/acp-10-7467-2010, 2010.
Andreae, M. and Merlet, P.: Emission of trace gases and aerosols from biomass burning, Global Biogeochem. Cy., 15, 955–966, 2001.
Aneja, V. P., Roelle, P. A., Murray, G. C., Southerland, J., Erisman, J. W., Fowler, D., Asman, W. A. H., and Patni, N.: Atmospheric nitrogen compounds II: emissions, transport, transformation, deposition and assessment, Atmos. Environ., 35, 1903–1911, 2001.
Arndt, R., Carmichael, G. R., Streets, D. G., and Bhatti, N.: Sulfur dioxide emissions and sectorial contributions to sulfur deposition in Asia, Atmos. Environ., 31, 1553–1572, 1997.
Atkinson, R.: Atmospheric chemistry of VOCs and NOx, Atmospheric Environment, 34, 2063–2101, 2000.
Bates, T. S., Lamb, B. K., Guenther, A., Dignon, J., and Stoiber, R. E.: Sulfur emissions to the atmosphere from natural sources, J. Atmos. Chem., 14, 315–317, 1992.
Beer, C., Reichstein, M., Tomelleri, E., Ciais, P., Jung, M., Carvalhais, N., Rödenbeck, C., Arain, M. A., Baldocchi, D., Bonan, G. B., Bondeau, A., Cescatti, A., Lasslop, G., Lindroth, A., Lomas, M., Luyssaert, S., Margolis, H., Oleson, K. W., Roupsard, O., Veenendaal, E., Viovy, N., Williams, C., Woodward, F. I., and Papale, D.: Terrestrial Gross Carbon Dioxide Uptake: Global Distribution and Covariation with Climate, Science, 329, 834–838, 2010.
Berrisford, P., Dee, D. P., Fielding, K., Fuentes, M., Kållberg, P., Kobayashi, S., and Uppala, S. M.: `The ERA-Interim Archive', ERA Report Series, No. 1. ECMWF, Reading, UK, 2009.
Brocard, D., Lacaux C., Lacaux, J. P., Kouadio, G., and Yobouè, V.: Emissions from the combustion of biofuels in western Africa, in: Global Biomass Burning, edited by: Levine, J. S., MIT Press, Cambridge, 492–508, 1996.
Bustamante, M. M. C., Medina, E., Asner, G. P., Nardoto, G. B., and Garcia-Montiel D. C.: Nitrogen cycling in tropical and temperate savanna, Biogeochemistry, 79, 209–237, 2006.
Campos, V. P., Cruz, L. P. S., Godoi, R. H. M., Godoi, A. F. L., and Tavares, T. M.: Development and validation of passive samplers for atmospheric monitoring of SO2, O3 and H2S in tropical areas, Microchem. J., 96, 132–138, 2010.
Carmichael, G., Sandu, A., Chai, T., Daescu, D., Constantinescu, E., and Tang, Y.: Predicting air quality: improvements through advanced methods to integrate models and measurements, J. Comput. Phys., 227, 3540–3571, 2008.
Cautenet, S. and Rosset, R.: Numerical simulation of sea breezes with vertical wind shear during dry season at Cape of Three Points, West Africa, Monthly Weather Rev., 117, 329–339, 1989.
Chen, Y., Randerson, J. T., van der Werf, G. R., Morton D. C., Mu, M., and Kasibhatlas, P. S.: Nitrogen deposition in tropical forests from savanna and deforestation fires, Global Change Biol., 16, 2024–2038, 2010.
Cook, G. D.: The fate of nutrients during fires in a tropical savanna, Austr. J. Ecol., 19, 359–365, 1994
Cooke, W. F., Koffi, B., and Gregoire, J.-M.: Seasonality of vegetation fires in Africa from remote sensing data and application to a global chemistry model, J. Geophys. Res., 101, 21051–21065, 1996.
Crutzen, P. J. and Andreae M. O.: Biomass burning in the tropics – impact on atmospheric chemistry and biogeochemical cycles, Science, 250, 1669–1678, 1990.
Curier, R. L., Timmermans, R., Calabretta-Jongen, S., Eskes, H., Segers, A., Swart, D., and Schaap, M.: Improving ozone forecasts over Europe by synergistic use of the LOTOS-EUROS chemical transport model and in-situ measurements, Atmos. Environ., 60, 217–226, 2012.
Delmas, R., Lacaux, J. P., Menaut, J. C., Abbadie, L., Leroux, X., Helas, G., and Lobert, J.: Nitrogen compound emission from biomass burning in tropical African savanna, FOS/DECAFEExperiment, J. Atmos. Chem., 22, 175–194, 1995.
Delon, C., Galy-Lacaux, C., Boone, A., Liousse, C., Serça, D., Adon, M., Diop, B., Akpo, A., Lavenu, F., Mougin, E., and Timouk, F.: Atmospheric nitrogen budget in Sahelian dry savannas, Atmos. Chem. Phys., 10, 2691–2708, https://doi.org/10.5194/acp-10-2691-2010, 2010.
Dise, N. B. and Wright, R. F.: Nitrogen leaching from European forests in relation to nitrogen deposition, Forest Ecol. Manage., 71, 153–161, 1995.
Elbern, H., Strunk, A., Schmidt, H., and Talagrand, O.: Emission rate and chemical state estimation by 4-dimensional variational inversion, Atmos. Chem. Phys., 7, 3749–3769, https://doi.org/10.5194/acp-7-3749-2007, 2007.
Ferm, M.: Method for determination of atmospheric ammonia, Atmos. Environ., 13, 1385–1393, 1979.
Ferm, M. and Sjödin, Å.: Proposal of an impregnated filter technique for monitoring of NO2 at EMEP stations, in: EMEP Workshop on measurements of nitrogen-containing compounds, Ballman, R., Les Diablerets, Switzerland, 173–181, 1993.
Flischer, K., Rebel, K. T., van der Molen, M. K., Erisman, J. W., Wassen, M. J., van Loon, E. E., Montagnani, L., Gough, G. M., Herbst, M., Janssens, I. A., Gianelle, D., and Dolman, A. J.: The contribution of nitrogen deposition to the photosynthetic capacity of forests, Global Biogeochem. Cy., 27, 187–199, 2013.
Galanter, M., Levy II, H., and Carmichael, G. R.: Impacts of biomass burning on tropospheric CO, NOx, and O3, J. Geophys. Res., 105, 6633–6653, 2000.
Galloway, J. N.: The global nitrogen cycle: changes and consequences, Environ. Pollut., 102, 15–24, 1998.
Gbambie, A. S. B. and Steyn, D. G.: Sea breezes at Cotonou and their interaction with the West African monsoon, Int. J. Climatol., 33, 2889–2899, https://doi.org/10.1002/joc.3637, 2012.
Gundersen, P., Emmet, B. A., Kionaas, O. J., Koopmans C. J., and Tietema A.: Impact of nitrogen deposition on nitrogen cycling in forests: a synthesis of NITREX data, Forest Ecol. Manage., 101, 37–55, 1998
Hall, J. B. and Swaine, M. D.: What is forest, in: Distribution and Ecology of Vascular Plants in a Tropical Rain Forest, Forest Vegetation in Ghana, edited by: Junk, W., The Hague, The Netherlands, 3–29, 1981.
Hao, W. M. and Liu, M.-H.: Spatial and temporal distribution of tropical biomass burning, Global Biogeochem. Cy., 8, 495–503, 1994.
Hertel, O., Skjoth, C. A., Lofstrom, P., Geels, C., Frohn, L. M., Ellermann, T., and Madsen, P. V.: Modelling nitrogen deposition on a local scale – A review of the current state of the art, Environ. Chem., 3, 317–337, 2006.
Houghton, R. A. and Hackler, J. L.: Emissions of carbon from land use change in sub-Saharan Africa, J. Geophys. Res., 111, G02003, https://doi.org/10.1029/2005JG000076, 2006.
Huebert, B. J. and Robert, C. H.: The dry deposition of nitric-acid to grass, J. Geophys. Res., 90, 2085–2090, 1985.
Huffman, G. J., Adler, R. F., Bolvin, D. T., Gu, G., Nelkin, E. J., Bowman, K. P., Hong, Y., Stocker, E. F., and Wolff, D. B.: The TRMM Multisatellite Precipitation Analysis (TMPA): Quasi-Global, Multiyear, Combined-Sensor Precipitation Estimates at Fine Scales, J. Hydrometeor, 8, 38–55, 2007.
Jacob, D. J. and Bakwin, P. S.: Cycling of NOx in tropical forest canopies and its implications for the global source of biogenic NOx to the atmosphere, in: Microbial Production and Consumption of Greenhouse Gases, edited by: Whitman, W. B., American Society of Microbiology, Washington DC, 1991.
Joly, M. and Voldoire, A.: Role of the Gulf of Guinea in the inter-annual variability of the West African monsoon: what do we learn from CMIP3 coupled simulations?, Int. J. Climatol., 30, 1843–1856, 2010.
Koppmann, R., von Czapiewski, K., and Reid, J. S.: A review of biomass burning emissions – Part I: gaseous emissions of carbon monoxide, methane, volatile organic compounds, and nitrogen containing compounds, Atmos. Chem. Phys. Discuss., 5, 10455–10516, https://doi.org/10.5194/acpd-5-10455-2005, 2005.
Lavaysse, C., Flamant, C., and Janicot, S.: Regional-scale convection patterns during strong and weak phases of the Saharan heat low, Atmosph. Sci. Lett., 11, 255–264, 2010.
Law, B.: Biogeochemistry: Nitrogen deposition and forest carbon, Nature, 496, 307–308, 2013.
Lebel, T. and Ali, A.: Recent trends in the Central and Western Sahel rainfall regime (1990–2007), J.Hydrol., 375, 52–64, 2009.
Lewis, S. L., Lopez-Gonzalez, G., Sonké, B., Affum-Baffoe, K., Baker, T. R., Ojo, L. O., Phillips, O. L., Reitsma, J. M., White, L., Comiskey, J. A., Djuikouo, K. M. N., Ewango, C. E., Feldpausch, T. R., Hamilton, A. C., Gloor, M., Hart, T., Hladik, A., Lloyd. J., Lovett, J. C., Makana, J. R., Malhi, Y., Mbago, F. M., Ndangalasi, H. J., Peacock, J., Peh, K. S., Sheil, D., Sunderland, T., Swaine, M. D., Taplin, J., Taylor, D., Thomas, S. C., Votere, R., and Wöll, H.: Increasing carbon storage in intact African tropical forests, Nature, 457, 1003–1006, 2009.
Lobert, J. M., Scharffe, D. H., Hao, W. M., and Crutzen, P. J.: Importance of biomass burning in the atmospheric budgets of nitrogen containing gases, Nature, 346, 552–554, 1990.
Magnani, F., Mencuccini, M., Borghetti, M., Berbigier, P., Berninger, F., Delzon, S., Grelle, A., Hari, P., Jarvis, P. G., Kolari, P., Kowalski, A. S., Lankreijer, H., Law, B.E., Lindroth, A., Loustau, D., Manca, G., Moncrieff, J. B., Rayment, M., Tedeschi, V., Valentini, R., and Grace, J.: The human footprint in the carbon cycle of temperate and boreal forests, Nature, 447, 849–851, 2007.
Martins, J. J., Dhammapala, R. S., Lachmann, G., Galy-Lacaux, C., and Pienaar, J. J.: Long-term measurements of sulphur dioxide, nitrogen dioxide, ammonia, nitric acid and ozone in southern Africa using passive samplers, S. Afr. J. Sci., 103, 336–342, 2007.
Nakai, T., van der Molen, M. K., Gash, J. H. C., and Kodama, Y.: Correction of sonic anemometerangle of attack errors, Agr. Forest Meteorol., 136, 19–30, 2006.
NASA FIRMS: MODIS Hotspot / Active Fire Detections, Data set, available at: http://earthdata.nasa.gov/firms, 2012.
Raison, R. J., Khanna, P. K., and Woods, P. V.: Mechanisms of element transfer to the atmosphere during vegetation fires, Can. J. Forest Res., 15, 132–140, 1985.
Reich, P. B. and Hobbie, S. E.: Decade-long soil nitrogen constraint on the CO2 fertilization of plant biomass, Nature Clim. Change, 3, 278–282, 2013.
Rennenberg, H. and Gessler, A.: Consequences of N deposition to forest ecosystems, recent results and future research needs, Water Air Soil Pollut., 116, 47–64, 1999.
Rondon, A. and Sanhueza, E.: Seasonal variation of gaseous HNO3 and NH3 at a tropical savannah site, J. Atmos. Chem., 11, 245–254, 1990.
Saatchi, S. S., Harris, N. L., Brown, S., Lefsky, M., Mitchard, E. T. A., Salas, W., Zutta, B. R., Buermann, W., Lewis, S. L., Hagen, S., Petrova, S., White, L., Silman, M., and Morel, A.: Benchmark map of forest carbon stocks in tropical regions across three continents, PNAS, 108, 9899–9904, 2011.
Seinfeld, J. H. and Pandis, S. N.: Atmospheric Chemistry and Physics, New York, John Wiley & Sons, Inc., 1998.
Serca, D., Delmas, R., Jamnert, C., and Labroue, L.: Emissions of nitrogen oxides from equatorial rain forest in central Africa: origin and regulation of NO emission from soils, Tellus, 46B, 243–254, 1994.
Sigha-Nkamdjou, L., Galy-Lacaux, C., Pont, V., Richard, S., Sighoumnou, D., and Lacaux, J. P.: Rainwater chemistry and wet deposition over the equatorial forested ecosystem of Zoétélé (Cameroon), J. Atmos. Chem., 46, 173–198, 2003.
Sparks, J. P., Monson, R. K., Sparks, K. L., and Lerdau, M.: Leaf uptake of nitrogen dioxide (NO2) in a tropical wet forest: implications for tropospheric chemistry, Oecologia, 127, 214–221, 2001.
Sutton, M. A., Tang, Y. S., Miners, B., and Fowler, D.: A new diffusion denuder system for long-term, regional monitoring of atmospheric ammonia and ammonium, Water, Air Soil Pollut. Focus, 1, 145–156, 2001.
Tang, Y. S., Simmons, I., van Dijk, N., Di Marco, C., Nemitz, E., Dammgen, U., Gilke, K., Djuricic, V., Vidic, S., Gliha, Z., Borovecki, D., Mitosinkova, M., Hanssen, J. E., Uggerud, T. H., Sanz, M. J., Sanz, P., Chorda, J. V., Flechard, C. R., Fauvel, Y., Ferm, M., Perrino, C., and Sutton, M. A.: European scale application of atmospheric reactive nitrogen measurements in a low-cost approach to infer dry deposition fluxes, Agriculture, Ecosys. Environ., 133, 183–195, 2009.
Thorncroft, C. D., Nguyen, H., Zhang, C., and Peyrillé, P.: Annual cycle of the West African monsoon: regional circulations and associated water vapour transport, Q. J. R. Meteorol. Soc., 137, 129–147, 2011.
Vickers, D. and Mahrt, L.: Quality control and flux sampling problems for tower and aircraft data, J. Atmos. Oc. Technol., 14, 512–526, 1997.
Wilczak, J. M., Oncley, S. P., and Stage, S. A.: Sonic anemometer tilt correction algorithms, Bound.-Layer Meteorol., 99, 127–150, 2001.
Wolff, V., Trebs, I., Foken, T., and Meixner, F. X.: Exchange of reactive nitrogen compounds: concentrations and fluxes of total ammonium and total nitrate above a spruce canopy, Biogeosciences, 7, 1729–1744, https://doi.org/10.5194/bg-7-1729-2010, 2010.
Yoboué, C., Galy–Lacaux, C., Lacaux, J. P., and Siluè, S.: Rainwater chemistry and wet deposition over the Wet Savanna Ecosystem of Lamto (Cote d'Ivoire), J. Atmos. Chem., 52, 117–141, 2005.
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