Redistribution characteristics of atmospheric precipitation in different spatial levels of Guangzhou urban typical forests in southern China

Results showed that the rainfall was typically acidic,and the acid rain type in Guangzhou urban area is converted from sulfuric acid type to mixed type of sulfuricacid and nitric acid.

📌 3 Key Takeaways

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Objective & Hypothesis:The aims of the present study were to determine the pH variation and chemical feature of atmospheric precipitationduring the research period.

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Key Findings & Data:Variability of ionic concentration andpH in the vertical sequence of different tree species showed that the net ion concentration variation index has asignificant conic relationship with ne pH change rate.

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Conclusion & Impact:Results showed that the rainfall was typically acidic,and the acid rain type in Guangzhou urban area is converted from sulfuric acid type to mixed type of sulfuricacid and nitric acid.

🔬Design:Research Article

📍Scope:Comprehensive Sample

⚙️Variables:Domain Parameters

Özet

The aims of the present study were to determine the pH variation and chemical feature of atmospheric precipitationduring the research period. We also investigated the redistribution characteristics of rainfall whilepassing through the canopy layer, leaf-litter layer and soil layer, successively to quantify the acid rain bufferingcapacity of these spatial levels in the evergreen broadleaved forest (EBF), deciduous broadleaved forest (DBF)and coniferous forest (CF) in Guangzhou urban area, China. Results showed that the rainfall was typically acidic,and the acid rain type in Guangzhou urban area is converted from sulfuric acid type to mixed type of sulfuricacid and nitric acid. The major ions from the canopy to the forest floor differed within the three forest types.However, the enrichment phenomenon of base cations in soil leachate in EBF and DBF implied that nutrient losswas more serious in the broadleaved forest than in the coniferous forest. Variability of ionic concentration andpH in the vertical sequence of different tree species showed that the net ion concentration variation index has asignificant conic relationship with ne pH change rate. We also built an acid rain buffering index, which combinesthe neutralization and interception effects of vegetation to acid rainfall. The present results indicated that thethree forest types in urban Guangzhou all have certain buffering capacity to acid rain, and following the order:DBF > EBF > CF. In the meanwhile, the forest canopy is the biggest acid rain buffer in urban Guangzhou,following by the soil.

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Cite This Article

WU, J., SU, Y., CHEN, X., LİU, L., SUN, C., ZHANG, H., LI, Y., YE, Y., ZHOU, X., YANG, J., WANG, C., ZHOU, G., HUANG, N. (2019). Redistribution characteristics of atmospheric precipitation in different spatial levels of Guangzhou urban typical forests in southern China. Atmospheric Pollution Research, Cilt: 10 - Sayı: 5, 1404–1411. https://ajindex.com/articles/351454

References (11)

Supplementary data to this article can be found online at https:// doi.org/10.1016/j.apr.2019.03.012. Allison, F.E., 1965. Evaluation of Incoming and Outgoing Processes that Affect Soil Nitrogen. Soil Nitrogen (soilnitrogen), pp. 573–606.
Balasubramanian, R., Victor, T., Chun, N., 2001. Chemical and statistical analysis of precipitation in Singapore. Water Air Soil Pollut. 130, 451–456.
Barshad, Isaac, 1951. Cation exchange in soil: I. Ammonium fixation and its relation to potassium fixation and to determination of ammonium exchange capacity. Soil Sci. 72, 361–372.
Burn, D.A., Aherne, J., Gay, D.A., Lehmann, C.M.B., 2016. Acid rain and its environmental effects: recent scientific advances. Atmos. Environ. 146, 1–4.
Cao, Y.Z., Wang, S., Gan, Z., Luo, J., Lu, S., 2009. Chemical characteristics of wet precipitation at an urban site of Guangzhou, South China. Atmos. Res. 94, 462–469.
Cerqueira, M.R.F., Pinto, M.F., Derossi, I.N., Esteves, W.T., Santos, M.D.R., Matos, M.A.C., Lewinsohn, D., Matos, R.C., 2014. Chemical characteristics of rainwater at a southern site of Brazil. Atmos. Pollut. Res. 5, 253–261.
Chen, B., Luo, J., Feng, A., 2006. Acid raining in Guangzhou area. Environ. poll. control 28, 112–115 (in Chinese). Chen, J., Li, W., Gao, F., 2010. Biogeochemical effects of forest vegetation on acid precipitation- related water chemistry: a case study in southwest China. J. Environ. Monit. 12, 1799–1806.
Chen, X.C., Jahn, H.J., Engling, G., Ward, T.J., et al., 2017. Chemical characterization and sources of personal exposure to fine particulate matter (PM2.5) in the megacity of Guangzhou, China. Environ. Pollut. 231, 871–881.
Cheng, Y., Ying, L., Huo, M., Qian, S., Wang, H., Chen, Z., Bai, Y., 2011. Chemical characteristics of precipitation at Nanping Mangdang Mountain in eastern China during spring. J. Environ. Sci-China 23, 1350–1358.
Dai, Z., Liu, Y., Wang, X., Zhao, D., 1998.
Changes in pH, CEC and exchangeable acidity of some forest soils in southern China during the last 32–35 years. Water Air Soil Pollut. 108, 377–390. de Oliveira Junior, R.C., Keller, M.M., da Fonseca Ramos, J.F., Beldini, T.P., Crill, P.M., de Camargo, P.B., de Camargo, P.B., van Haren, J., 2015. Chemical analysis of rainfall and throughfall in the Tapajós national forest, Belterra, Pará, Brazil. Rev. Ambient. Água 10 ambi-agua.1552. Du, E., de Vries, W., Liu, X., Fang, J., Galloway, J.N., Jiang, Y., 2015. Spatial boundary of urban 'acid islands' in southern China. Sci. Rep. 5. htt