Please use this identifier to cite or link to this item:
Title: Dry and wet atmospheric deposition of nitrogen and phosphorus in Singapore
Authors: He, J. 
Balasubramanian, R. 
Burger, D.F.
Hicks, K.
Kuylenstierna, J.C.I.
Palani, S. 
Keywords: Atmospheric deposition
Issue Date: May-2011
Citation: He, J., Balasubramanian, R., Burger, D.F., Hicks, K., Kuylenstierna, J.C.I., Palani, S. (2011-05). Dry and wet atmospheric deposition of nitrogen and phosphorus in Singapore. Atmospheric Environment 45 (16) : 2760-2768. ScholarBank@NUS Repository.
Abstract: Atmospheric nutrients have recently gained increased attention as significant additional sources of new nitrogen (N) and phosphorus (P) loading to aquatic ecosystems. The levels of nutrients (NO3 --N, NH4 +-N, ON, DIP and OP) in aerosols and rainwater were measured and their respective deposition fluxes were estimated in the Marina catchment area, Singapore, from April 2007 to March 2008. During the study period, the mean atmospheric dry particulate fluxes (mgm-2month-1) were 21.64±13.56, 2.95±1.73, 24.21±9.59, 4.48±1.74 and 7.19±2.83 for NO3 --N, NH4 +-N, ON, DIP and OP, respectively. In addition, the mean wet deposition fluxes (mgm-2month-1) were 59.60±45.29, 30.39±12.99, 39.03±20.70, 1.79±1.03 and 2.46±1.29 for NO3 --N, NH4 +-N, ON, DIP and OP, respectively. Wet deposition made a larger contribution to total fluxes than dry deposition for N species especially NO3 - and NH4 +, but P species showed the opposite trend. Both TN and TP showed different seasonal variations with peak wet deposition fluxes in Dec 2007 and Jan 2008 as compared to dry deposition fluxes which peaked during the inter-monsoon (IM) period. Other than the local emissions, air mass backward trajectory analysis indicated that the atmospheric nutrient concentration may be affected by transboundary transport of nutrients from regional sources during different monsoon seasons. Statistical correlation analysis showed that the deposition fluxes were associated with meteorological factors. In addition, the N:P ratio in annual total (dry particulate+wet) atmospheric deposition flux in this study was 10.5, implying that the aquatic ecosystems in Singapore, fed principally by atmospheric nutrients, may tend toward N-limitation. © 2011 Elsevier Ltd.
Source Title: Atmospheric Environment
ISSN: 13522310
DOI: 10.1016/j.atmosenv.2011.02.036
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on May 7, 2021


checked on May 7, 2021

Page view(s)

checked on May 3, 2021

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.