Call for papers of Special Issue “Toward the development of total reactive nitrogen deposition budgets in North America”
• 大类 : 环境科学与生态学 - 2区
• 小类 : 环境科学 - 2区
Interest in better understanding atmospheric inputs of reactive nitrogen (Nr) to terrestrial and aquatic ecosystems across North America has increased with the development of critical load frameworks for nutrients and acidity. Impacts of excess Nr on terrestrial ecosystems include soil acidification, changes in biodiversity, and reduced resilience to climate variability and other stressors, while eutrophication and acidification can occur in aquatic ecosystems. The need to better understand these important issues has motivated interest in improving atmospheric Nr deposition budgets.
Significant advancements have been made in measuring and modeling Nr deposition over the past two decades, but important data and knowledge gaps persist. Agricultural regions and urban areas represent key under-sampled environments where additional monitoring is needed to better understand deposition rates and patterns. There is a general lack of understanding of the contribution of organic N forms to Nr deposition budgets. Additional measurements are needed to better understand the magnitude of dry Nr deposition and the processes by which reduced and organic N forms are exchanged between the atmosphere and biosphere. New methods are needed to incorporate both ground-based and remotely sensed Nr measurements into chemical transport models to develop more accurate and spatially representative deposition budgets. Advanced air-surface exchange models are needed to explicitly link atmospheric Nr concentrations and deposition to ecosystem endpoints. Finally, estimates of uncertainty in total deposition budgets are needed to inform the uncertainty in critical load exceedances.
This special issue welcomes papers that examine aspects of total Nr deposition across North America, including trends and spatial patterns, source apportionment, new measurement and modeling techniques for speciating Nr deposition, uncertainty in measured and modeled Nr deposition budgets, processes of Nr air-surface exchange, and linkages between Nr deposition and ecosystem function. Submission of review oriented papers that address the state of the science and critical knowledge gaps limiting the development of more complete and accurate Nr deposition budgets in North America are welcomed.