Fluxes of carbon dioxide, methane and nitrous oxide in two contrastive fringing zones of coastal lagoon, Lake Nakaumi, Japan
Fluxes of carbon dioxide, methane and nitrous oxide in two contrastive fringing zones of coastal lagoon, Lake Nakaumi, Japan
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DOI：
10.1016/j.chemosphere.2007.01.002
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发表时间：
2007-06-01
期刊：
影响因子：
8.8
通讯作者：
Kunii, Hidenobu
中科院分区：
文献类型：
--
作者：
Hirota, Mitsuru;Senga, Yukiko;Kunii, Hidenobu
2003年仲夏，在日本中海湖岸滩和盐沼两个典型边缘带同时测量了二氧化碳（CO2）、甲烷（CH4）和氧化亚氮（N2O）的通量。我们的目的是量化两个站点的温室气体（GHGs）通量，并研究控制温室气体通量变化的关键因素。两个地点的CO2和CH4净通量差异显著；两种通量在沙质海岸的大小和变化都低于盐沼。同时，两个站点的净N2O通量的大小和变化相似。在沙质海岸，3种温室气体通量的时空变化受到天文潮汐引起的水位波动的高度控制。盐沼区3种温室气体通量的空间变化与地上生物量相关，CO2和CH4通量的时间变化与土壤温度相关。利用观测到的温室气体通量粗略估计的全球变暖潜势总和，在盐沼中比在沙质海岸高约174倍。(c) 2007 Elsevier Ltd.版权所有。
We measured fluxes of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) simultaneously in two typical fringing zones, sandy shore and salt marsh, of coastal lagoon, Lake Nakaumi, Japan, in mid-summer 2003. Our aim was to quantify net the greenhouse gases (GHGs) fluxes and examine key factors, which control variation of the GHGs fluxes in the two sites. Net CO2 and CH4 fluxes were markedly different between the two sites; magnitudes and variations of the both fluxes in sandy shore were lower than those of salt marsh. Meanwhile, magnitude and variation of net N2O flux in the two sites were similar. In sandy shore, temporal and spatial variation of the three GHGs fluxes were highly controlled by water level fluctuation derived from astronomic tide. In salt marsh, spatial variation of the three GHGs fluxes were correlated with aboveground biomass, and temporal variation of CO2 and CH4 fluxes were correlated with soil temperature. The sum of global warming potential, which was roughly estimated using the observed GHGs fluxes, was ca. 174-fold higher in salt marsh than in sandy shore. (c) 2007 Elsevier Ltd. All rights reserved.