Abstract
Anthropogenic emissions have substantially altered atmospheric acid and nutrient deposition in China. Understanding the status and characteristics of acid and nutrient deposition to China’s forests is crucial to assess the consequent impacts, and to better guide forest management options. Based on a comprehensive literature review, here I present an updated database for annual acid and nutrient deposition during the period 1991-2015 in China’s forests (CFAND 2.0). The database includes information from 56 forested sites on the water fluxes of bulk precipitation and throughfall, the concentrations of H+ (pH), dissolved inorganic nitrogen (N) (NH4+ and NO3−), sulfur (S), dissolved phosphorus (P), potassium (K+), calcium (Ca2+) and magnesium (Mg2+) in bulk precipitation and throughfall, and the fluxes of dissolved inorganic N, S, dissolved P, K+, Ca2+ and Mg2+ in bulk deposition and throughfall. This database will help to understand the spatial patterns of acid and nutrient deposition, validate modelling results of acid and nutrient deposition and assess the ecological effects of acid and nutrient deposition in China’s forests.
Highlights
Background & SummaryAs a result of rapid industrial, agricultural and urban development, anthropogenic emissions of acid precursors increasing (e.g., NOx, NH3 concerns about and SO2) have substantially enhanced acid deposition their consequent impacts on ecosystem health and in China and aroused function[1,2,3]
Acid deposition may increase the leaching of base cationic nutrients (K+, Ca2+ and Mg2+) from soils and cause plants to rely increasingly on base cationic nutrients from atmospheric deposition[1,7,8]
Highlevel N deposition has resulted in an imbalance of atmospheric N and phosphorus (P) inputs to terrestrial ecosystems in China[10]
Summary
As a result of rapid industrial, agricultural and urban development, anthropogenic emissions of acid precursors increasing (e.g., NOx, NH3 concerns about and SO2) have substantially enhanced acid deposition their consequent impacts on ecosystem health and in China and aroused function[1,2,3]. There are increasing individual measurements of bulk deposition and throughfall fluxes of chemical elements in China’s forests[6,10,14,15] These measurements allow a more comprehensive assessment of atmospheric acid and nutrients inputs to China’s forests. The CFAND 2.0 database is structured on three files, including a ‘data file’, a ‘readme file’ and a ‘source file’ (Fig. 1) It includes detailed information on the water fluxes of bulk precipitation and throughfall, the concentrations of H+ (pH), dissolved inorganic N (NH4+ and NO3−), S, dissolved P, K+, Ca2+ and Mg2+ in bulk precipitation and throughfall, and the fluxes of dissolved inorganic N, S, dissolved P, K+, Ca2+ and Mg2+ in bulk deposition and throughfall as well as geographical information (longitude and latitude), forest type, and methods of field sampling and laboratory analysis. Due to a lack of long-term monitoring data for each site, this database is not able to track changes in acid and nutrient deposition over time
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