Search Results - "Theobald, M R"

Critical loads of nitrogen deposition and critical levels of atmospheric ammonia for semi-natural Mediterranean evergreen woodlands by Pinho, P, Theobald, M. R, Dias, T, Tang, Y. S, Cruz, C, Martins-Loução, M. A, Máguas, C, Sutton, M, Branquinho, C

“…Nitrogen (N) has emerged in recent years as a key factor associated with global changes, with impacts on biodiversity, ecosystems functioning and human health…”
Get full text

Remote sensing of LAI, chlorophyll and leaf nitrogen pools of crop- and grasslands in five European landscapes by Boegh, E, Houborg, R, Bienkowski, J, Braban, C. F, Dalgaard, T, van Dijk, N, Dragosits, U, Holmes, E, Magliulo, V, Schelde, K, Di Tommasi, P, Vitale, L, Theobald, M. R, Cellier, P, Sutton, M. A

“…Leaf nitrogen and leaf surface area influence the exchange of gases between terrestrial ecosystems and the atmosphere, and play a significant role in the…”
Get full text

Farm nitrogen balances in six European landscapes as an indicator for nitrogen losses and basis for improved management by Dalgaard, T, Bienkowski, J. F, Bleeker, A, Dragosits, U, Drouet, J. L, Durand, P, Frumau, A, Hutchings, N. J, Kedziora, A, Magliulo, V, Olesen, J. E, Theobald, M. R, Maury, O, Akkal, N, Cellier, P

“…Improved management of nitrogen (N) in agriculture is necessary to achieve a sustainable balance between the production of food and other biomass, and the…”
Get full text

Cerebral MR Venography: Normal Anatomy and Potential Diagnostic Pitfalls by Ayanzen, R. H, Bird, C. R, Keller, P. J, McCully, F. J, Theobald, M. R, Heiserman, J. E

“…MR venography is often used to examine the intracranial venous system, particularly in the evaluation of dural sinus thrombosis. The purpose of this study was…”
Get full text

Spatial and temporal variability of nitrous oxide emissions in a mixed farming landscape of Denmark by Schelde, K, Cellier, P, Bertolini, T, Dalgaard, T, Weidinger, T, Theobald, M. R, Olesen, J. E

“…Nitrous oxide (N2O) emissions from agricultural land are variable at the landscape scale due to variability in land use, management, soil type, and topography…”
Get full text

Modelling agro-forestry scenarios for ammonia abatement in the landscape by Bealey, W J, Loubet, B, Braban, C F, Famulari, D, Theobald, M R, Reis, S, Reay, D S, Sutton, M A

“…Ammonia emissions from livestock production can have negative impacts on nearby protected sites and ecosystems that are sensitive to eutrophication and…”
Get full text

Estimation of nitrogen budgets for contrasting catchments at the landscape scale by Vogt, E, Braban, C. F, Dragosits, U, Theobald, M. R, Billett, M. F, Dore, A. J, Tang, Y. S, van Dijk, N, Rees, R. M, McDonald, C, Murray, S, Skiba, U. M, Sutton, M. A

“…A comprehensive assessment of nitrogen (N) flows at the landscape scale is fundamental to understand spatial interactions in the N cascade and to inform the…”
Get full text

Temporal variability in bioassays of the stomatal ammonia compensation point in relation to plant and soil nitrogen parameters in intensively managed grassland by Mattsson, M., Herrmann, B., David, M., Loubet, B., Riedo, M., Theobald, M. R., Sutton, M. A., Bruhn, D., Neftel, A., Schjoerring, J. K.

“…The exchange of ammonia between crop canopies and the atmosphere depends on a range of plant parameters and climatic conditions. However, little is known about…”
Get full text

Ammonia fluxes in relation to cutting and fertilization of an intensively managed grassland derived from an inter-comparison of gradient measurements by Milford, C., Theobald, M. R., Nemitz, E., Hargreaves, K. J., Horvath, L., Raso, J., Dämmgen, U., Neftel, A., Jones, S. K., Hensen, A., Loubet, B., Cellier, P., Sutton, M. A.

“…Quantification of ammonia (NH3) land-atmosphere exchange is required for atmospheric modelling and assessment of nitrogen deposition, yet flux measurement…”
Get full text

Temporal variation in atmospheric ammonia concentrations above seabird colonies by Blackall, T.D., Wilson, L.J., Bull, J., Theobald, M.R., Bacon, P.J., Hamer, K.C., Wanless, S., Sutton, M.A.

“…Recent studies have shown that seabirds are an important source of ammonia (NH 3) emissions in remote coastal ecosystems. Nesting behaviour, which varies…”
Get full text

A simple model for screening the local impacts of atmospheric ammonia by Theobald, M.R., Bealey, W.J., Tang, Y.S., Vallejo, A., Sutton, M.A.

“…The dry deposition of ammonia from the atmosphere to the surface can lead to eutrophication of sensitive ecosystems and acidification of the soil. A large…”
Get full text

Ammonia emission, deposition and impact assessment at the field scale: a case study of sub-grid spatial variability by Dragosits, U, Theobald, M.R, Place, C.J, Lord, E, Webb, J, Hill, J, ApSimon, H.M, Sutton, M.A

“…Due to local variability, current national assessments of ammonia in Great Britain at the 5-km grid level underestimate critical load exceedances in…”
Get full text

Ammonia emissions from a Cape fur seal colony, Cape Cross, Namibia by Theobald, M. R., Crittenden, P. D., Hunt, A. P., Tang, Y. S., Dragosits, U., Sutton, M. A.

“…Large animal colonies are significant sources of atmospheric NH3 that can potentially increase the nitrogen status of nearby ecosystems. Atmospheric NH3…”
Get full text

Dynamics of ammonia exchange with cut grassland: strategy and implementation of the GRAMINAE Integrated Experiment by Sutton, M. A., Nemitz, E., Theobald, M. R., Milford, C., Dorsey, J. R., Gallagher, M. W., Hensen, A., Jongejan, P. A. C., Erisman, J. W., Mattsson, M., Schjoerring, J. K., Cellier, P., Loubet, B., Roche, R., Neftel, A., Hermann, B., Jones, S. K., Lehman, B. E., Horvath, L., Weidinger, T., Rajkai, K., Burkhardt, J., Löpmeier, F. J., Daemmgen, U.

“…A major international experiment on ammonia (NH3) biosphere-atmosphere exchange was conducted over intensively managed grassland at Braunschweig, Germany. The…”
Get full text

An evaluation of European nitrogen and sulfur wet deposition and their trends estimated by six chemistry transport models for the period 1990–2010 by Theobald, Mark R., Vivanco, Marta G., Aas, Wenche, Andersson, Camilla, Ciarelli, Giancarlo, Couvidat, Florian, Cuvelier, Kees, Manders, Astrid, Mircea, Mihaela, Pay, Maria-Teresa, Tsyro, Svetlana, Adani, Mario, Bergström, Robert, Bessagnet, Bertrand, Briganti, Gino, Cappelletti, Andrea, D'Isidoro, Massimo, Fagerli, Hilde, Mar, Kathleen, Otero, Noelia, Raffort, Valentin, Roustan, Yelva, Schaap, Martijn, Wind, Peter, Colette, Augustin

“…The wet deposition of nitrogen and sulfur in Europe for the period 1990–2010 was estimated by six atmospheric chemistry transport models (CHIMERE, CMAQ, EMEP…”
Get full text

Lichen response to ammonia deposition defines the footprint of a penguin rookery by Crittenden, P. D., Scrimgeour, C. M., Minnullina, G., Sutton, M. A., Tang, Y. S., Theobald, M. R.

“…Ammonia volatilized from penguin rookeries is a major nitrogen source in Antarctic coastal terrestrial ecosystems. However, the spatial extent of ammonia…”
Get full text

How do emission reductions of individual national and local measures impact street-level air quality in a neighbourhood of Madrid, Spain? by Santiago, J. L., Rivas, E., Sanchez, B., Vivanco, M. G., Theobald, M. R., Garrido, J. L., Gil, V., Buccolieri, R., Martilli, A., Rodríguez-Sánchez, A., Martín, F.

“…This paper aims to assess the impact of individual measures for NOx emission reduction on NO 2 concentrations at very high spatial resolution in an urban…”
Get full text

Biosphere-atmosphere interactions of ammonia with grasslands: Experimental strategy and results from a new European initiative by Sutton, M.A., Milford, C., Nemitz, E., Theobald, M.R., Hill, P.W., Fowler, D., Schjoerring, J.K., Mattsson, M.E., Nielsen, K.H., Husted, S., Erisman, J.W., Otjes, R., Hensen, A., Mosquera, J., Cellier, P., Loubet, B., David, M., Genermont, S., Neftel, A., Blatter, A., Herrmann, B., Jones, S.K., Horvath, L., Führer, E.C., Mantzanas, K., Koukoura, Z., Gallagher, M., Williams, P., Flynn, M., Riedo, M.

“…A new study to address the biosphere-atmosphere exchange of ammonia (NH₃) with grasslands is applying a European transect to interpret NH₃ fluxes in relation…”
Get full text

Trends of inorganic and organic aerosols and precursor gases in Europe: insights from the EURODELTA multi-model experiment over the 1990–2010 period by Ciarelli, Giancarlo, Theobald, Mark R, Vivanco, Marta G, Beekmann, Matthias, Aas, Wenche, Andersson, Camilla, Bergström, Robert, Manders-Groot, Astrid, Couvidat, Florian, Mircea, Mihaela, Tsyro, Svetlana, Fagerli, Hilde, Mar, Kathleen, Raffort, Valentin, Roustan, Yelva, Pay, Maria-Teresa, Schaap, Martijn, Kranenburg, Richard, Adani, Mario, Briganti, Gino, Cappelletti, Andrea, D'Isidoro, Massimo, Cuvelier, Cornelis, Cholakian, Arineh, Bessagnet, Bertrand, Wind, Peter, Colette, Augustin

“…In the framework of the EURODELTA-Trends (EDT) modeling experiment, several chemical transport models (CTMs) were applied for the 1990–2010 period to…”
Get full text

Joint analysis of deposition fluxes and atmospheric concentrations of inorganic nitrogen and sulphur compounds predicted by six chemistry transport models in the frame of the EURODELTAIII project by Vivanco, M.G., Bessagnet, B., Cuvelier, C., Theobald, M.R., Tsyro, S., Pirovano, G., Aulinger, A., Bieser, J., Calori, G., Ciarelli, G., Manders, A., Mircea, M., Aksoyoglu, S., Briganti, G., Cappelletti, A., Colette, A., Couvidat, F., D'Isidoro, M., Kranenburg, R., Meleux, F., Menut, L., Pay, M.T., Rouïl, L., Silibello, C., Thunis, P., Ung, A.

“…In the framework of the UNECE Task Force on Measurement and Modelling (TFMM) under the Convention on Long-range Transboundary Air Pollution (LRTAP), the…”
Get full text