Identifying sources of phosphorus in precipitation using phosphate oxygen isotope in a human and monsoon Co-affected embayment
Identifying sources of phosphorus in precipitation using phosphate oxygen isotope in a human and monsoon Co-affected embayment
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在人类和季风共同影响的海湾中使用磷酸盐氧同位素识别降水中的磷来源
DOI：
10.1016/j.atmosenv.2020.118008
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发表时间：
2021
影响因子：
5
通讯作者：
Songlin Liu
中科院分区：
文献类型：
--
作者：
Yunchao Wu;Xiaoping Huang;Zhijian Jiang;Songlin Liu
降水中的磷为淡水和海水提供了相当大一部分生物有效磷。为了确定磷的可能来源，并解释大气中磷的沉积过程，我们测量了2015年10月至2017年3月大亚湾大气中磷的磷氧同位素(δ18OP)。同位素结果表明，枯水期δ18OP值(+19.60‰~+25.80‰，+23.10‰平均值)显著高于丰水期(+12.52‰~+20.11‰，+16.73‰平均值)，表明不同磷源对降水的贡献不同。δ18OP值主要受磷浓度、降雨量和气温的影响。在季节变化中，磷库之间的磷酸盐分子交换导致同位素稀释(雨季)或浓缩(旱季)。δ18OP值表明，枯水期以燃煤(39%±16%)、生物质燃烧(22%±18%)和土壤源(17%±13%)为主，而海洋源(28%±19%)和燃煤(24%±12%)所占比例最大。大亚湾大气磷的湿沉降通量为379.0μ−2.yr−1。大亚湾磷的湿沉降表现出明显的季节变化趋势，雨季的湿沉降通量高于枯季，这是由于降雨量较大和季节间的源转移(本地源向海洋源转移)所致。
The phosphorus in precipitation provides a significant fraction of the bioavailable phosphorus to fresh and marine waters. To identify the possible sources and interpret the atmospheric deposition processes of phosphorus, we measured the phosphate oxygen isotopes (δ18OP) in the precipitation monthly from October 2015 to March 2017 in Daya Bay, South China Sea. The isotopic results show that the δ18OP values in the dry season (+19.60‰ to +25.80‰, +23.10‰ average) were significantly higher than those in the wet season (+12.52‰ to +20.11‰, +16.73‰ average), indicating a variable contribution from different phosphorus sources to the precipitation between seasons. The δ18OP value was primarily influenced by the phosphorus concentrations, rainfall, and air temperature. The exchange of phosphate molecules among phosphorus pools caused isotope dilution (wet season) or enrichment effects (dry season) during the seasonal shifts. The δ18OP value of the precipitation and the local end-members indicate that coal combustion (39%±16%), biomass burning (22%±18%), and soil (17%±13%) sources dominate in the dry season, whereas marine sources (28%±19%) and coal combustion (24%±12%) account for the highest proportion in the wet season using a MixSIAR model. The atmospheric wet deposition flux of phosphorus in Daya Bay was 379.0μmolm−2·yr−1. The wet deposition of phosphorus exhibits a significant seasonal trend with higher deposition fluxes in the wet season than in the dry season as a result of higher rainfall and source shifts (local sources to marine source) between seasons.
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DOI：
--
发表时间：
2016
期刊：
--
影响因子：
--
作者：
Sunendra R. Joshi
通讯作者：
Sunendra R. Joshi
影响因子：
2.1
作者：
A. C. Redfield
通讯作者：
A. C. Redfield
DOI：
--
发表时间：
2000
期刊：
Moscow University Soil Science Bulletin
影响因子：
--
作者：
M. Makarov;T. Malysheva;N. Nedbaev;Š. Petrová
通讯作者：
M. Makarov;T. Malysheva;N. Nedbaev;Š. Petrová
影响因子：
4.4
作者：
Chen, Ying;Mills, Sally;Paytan, Adina
通讯作者：
Paytan, Adina
以初级生产力作为海岸带富营养化指标：以大亚湾为例
影响因子：
2
作者：
Liu, Huaxue;Huang, Liangmin;Song, Xingyu;Zhong, Yu
通讯作者：
Zhong, Yu