A. Johansson, Å. K. Klemedtsson, L. Klemedtsson, B. Svensson
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引用次数: 75
摘要
在1998年和1999年的生长季节,在瑞典一个接收废水的人工湿地中进行了氮氧通量的静态室测量。湿地不同区域的优势植物种类为小柠檬草(lena minor L .)、热带风叶(Typha latifolia L .)。水绵;分别为大甘油三酯(Hartm.)和蝴蝶兰(Phalaris arundinacea)。在-350 μg N 2o m−2 h−1的消耗和1791 μg N 2o m−2 h−1的排放之间存在较大的时空差异。1999年10月正通量最大,7月中旬最小。2年平均N 2o通量为130 μg N 2o m−2 h−1 (SD = 220)。尽管两个生长季节在气温和降水方面存在较大差异,但各年之间的氮氧通量没有显著差异。15%的通量是负的,表明在大多数测点都有氮的消耗,在1 - 350 μg N O m−2 h−1之间。含主成分的多元线性回归分析解释了氮氧通量变化的13-43%。根据IPCC的方法,从人工湿地的n2o通量计算排放因子。计算的排放因子始终低于IPCC提供的默认因子(0.75%)(0.02 ~ 0.27%)。因此,直接应用IPCC默认因子可能会导致高估人工污水处理湿地的氮氧通量。DOI: 10.1034 / j.1600-0889.2003.00034.x
Nitrous oxide exchanges with the atmosphere of a constructed wetland treating wastewater Parameters and implications for emission factors
Static chamber measurements of N 2 O fluxes were taken during the 1998 and 1999 growth seasons in a Swedish constructed wetland receiving wastewater. The dominating plant species in different parts of the wetland were Lemna minor L ., Typha latifolia L . , Spirogyra sp . and Glyceria maxima (Hartm.) and Phalaris arundinacea (L.), respectively. There were large temporal and spatial variations in N 2 O fluxes, which ranged from consumption at –350 to emissions at 1791 μg N 2 O m −2 h −1 . The largest positive flux occurred in October 1999 and the lowest in the middle of July 1999. The average N 2 O flux for the two years was 130 μg N 2 O m −2 h −1 (SD = 220). No significant differences in N 2 O fluxes were found between the years, even though the two growing seasons differed considerably with respect to both air temperature and precipitation. 15% of the fluxes were negative, showing a consumption of N 2 O. Consumption occurred on a few occasions at most measurement sites and ranged from 1–350 μg N 2 O m −2 h −1 . 13–43% of the variation in N 2 O fluxes was explained by multiple linear regression analysis including principal components. Emission factors were calculated according to IPCC methods from the N 2 O fluxes in the constructed wetland. The calculated emission factors were always lower (0.02–0.27%) compared to the default factor provided by the IPCC (0.75%). Thus, direct application of the IPCC default factor may lead to overestimation of N 2 O fluxes from constructed wastewater-treating wetlands. DOI: 10.1034/j.1600-0889.2003.00034.x
期刊介绍:
Tellus B: Chemical and Physical Meteorology along with its sister journal Tellus A: Dynamic Meteorology and Oceanography, are the international, peer-reviewed journals of the International Meteorological Institute in Stockholm, an independent non-for-profit body integrated into the Department of Meteorology at the Faculty of Sciences of Stockholm University, Sweden. Aiming to promote the exchange of knowledge about meteorology from across a range of scientific sub-disciplines, the two journals serve an international community of researchers, policy makers, managers, media and the general public.