Effects of temperature-induced sea breezes on phosphorus dynamics in a shallow eutrophic lake
Effects of temperature-induced sea breezes on phosphorus dynamics in a shallow eutrophic lake
复制标题
DOI：
10.1071/mf11182
复制
发表时间：
2012-01-01
影响因子：
1.8
通讯作者：
Isobe, Masahiko
中科院分区：
文献类型：
--
作者：
Shinohara, Ryuichiro;Isobe, Masahiko
阵风经常有助于在静止的沃茨的营养盐的内部负载，但在湖泊中诱导阵风和磷（P）动态的气象因素之间的联系还不清楚。我们测试的假设，当大气温度引起的海风发生时，在一个浅富营养化湖泊的总P（TP）浓度将显着大于当没有海风。有海风的日子TP浓度显着大于无微风的日子，表明强海风增加沉积物再悬浮和沉积物P供应到地表水。在这种情况下，水温也随着气温的升高而升高，明显高于没有微风的日子。高叶绿素a和pH值改变了悬浮颗粒物中藻类有效磷组分的顺序提取，其中含有高水平的活性和残留磷和低水平的NaOH-P。NaOH-P浓度较低的日子海风，表明P从该组分中释放。我们的研究说明了如何上升的空气温度诱导阵风，这是一个重要的机制，在浅水湖泊中的P动态。
Wind gusts often contribute to the internal loading of nutrients in standing waters, but the linkage between the meteorological factors inducing wind gusts and phosphorus (P) dynamics in lakes is unclear. We tested the hypothesis that when atmospheric temperature-induced sea breezes occur, the total P (TP) concentration in a shallow eutrophic lake will be significantly greater than when there were no sea breezes. TP concentrations on days with sea breezes were significantly greater than on breezeless days, indicating that strong sea breezes increase sediment resuspension and that sediment P is supplied to surface water. In this case, water temperature also increased with increasing air temperature, which was significantly higher than on the days with no breezes. The high chlorophyll a and pH values alter the sequentially extracted algal available P fractions of suspended particles, which contained high levels of labile-and residual-P and low levels of NaOH-P. The NaOH-P concentration was lower on the days with sea breezes, indicating that P is released from this fraction. Our study illustrates how rising air temperature induces wind gusts, which are an important mechanism for P dynamics in shallow lakes.