A three-dimensional Chemistry Transport Model was used to study the meteorologically induced interannual variability and trends in deposition of sulphur and nitrogen as well as concentrations of surface ozone (O3), nitrogen dioxide (NO2) and particulate matter (PM) and its constituents over Europe during 1958–2001. The model was coupled to the meteorological reanalysis ERA40, produced at the Eu...

Atmospheric deposition has long been recognized as an important source of pollutants and nutrients to ecosystems. The need for reliable, spatially explicit estimates of total atmospheric deposition (wet + dry + cloud) is central, not only to air pollution effects researchers, but also for calculation of input-output budgets, and to decision makers faced with the challenge of assessing the effic...

Bulk deposition, wet-only deposition, throughfall and dry deposition inferred from washing foliage and surrogate surfaces were used to describe inorganic N inputs to a forested catchment in the Montseny Mountains (La Castanya, Catalonia, Spain). Bulk inputs of inorganic N were moderate, with a mean of 5.7 kg N ha-1 yr-1, ranging between 4 and 10 kg N ha-1 yr-1 for the period 1983 to 2000. Dry d...

The trace metal (TM: Cd, Cu, Ni, Pb and Zn) budget (stocks and annual fluxes) was evaluated in a forest stand (silver fir, Abies alba Miller) in north-eastern France. Trace metal concentrations were measured in different tree compartments in order to assess TM partitioning and dynamics in the trees. Inputs included bulk deposition, estimated dry deposition and weathering. Outputs were leaching ...

[1] During summer 2004, HNO3 and size-resolved aerosols were measured in parallel, and corresponding dry-deposition fluxes were modeled at Appledore Island, Maine, as part of the International Consortium for Atmospheric Research on Transport and Transformation (ICARTT) field program. HNO3 concentrations varied widely on the timescale of hours; however, all days were characterized by a minimum n...

[1] We develop a 1-D steady state photochemical model of the modern Martian atmosphere and apply it to possible Martian atmospheres present and past. A unique feature of our model is that the major current sink of oxygen is dry deposition (surface reactions) of highly reactive, oxidized molecules (chiefly H2O2), rather than oxygen escape to space. Another difference is that we allow hydrogen to...

The concentrations of polycyclic aromatic hydrocarbons (PAHs) in gas phase and particle bound were measured simultaneously at industrial (INDUSTRY), urban (URBAN), and rural areas (RURAL) in Taichung, Taiwan. And the PAH concentrations, size distributions, estimated PAHs dry deposition fluxes and health risk study of PAHs in the ambient air of central Taiwan were discussed in this study. Total ...

acid rain has been a big problem for urban area during recent decades. acid rain comes from high concentration of air pollutant, including man made or artificial and natural, in the atmosphere. mashhad, as the biggest religious town in iran, has also been imposed with this problem. in this investigation the samples of rains during autumn 2002 and spring 2003 are analyzed. the results showed tha...

Abstract The atmospheric deposition of nitrate and ammonia species has been identified as a major factor in the decline of water quality in the Chesapeake Bay. Recent reports have indicated that atmospheric deposition may account for 25 to 80% of the total nitrogen load entering the Bay. However, many uncertainties exist regarding the accuracy of these estimates including the accuracy of the at...