[富营养化盐碱湖岱海湖温室气体排放特征及驱动因素分析]。

Q2 Environmental Science
Zong-Fu Lu, Xiao-Hong Shi, Guo-Hua Li
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引用次数: 0

摘要

以内蒙古岱海湖为例,根据水文分布特征,选取2023年4月、7月和10月的10个监测点,研究中国北方富营养化盐湖温室气体排放特征及驱动因素。利用顶空气相色谱法和建模方法,测定了近岸区二氧化碳(CO2)、甲烷(CH4)和氧化亚氮(N2O)的溶解浓度和交换通量。和一氧化二氮(N2O)。在研究期间,岱海湖温室气体浓度和通量呈现出显著的季节性变化。地表水中 CO2、CH4 和 N2O 的平均浓度分别为(26.52 ± 17.58)、(26.52 ± 17.58)、(26.52 ± 17.58)和(26.52 ± 17.58)。μmol-L-1、(282.30 ± 172.30)nmol-L-1)和(9.09 ± 1.64nmol-L-1。平均通量为(5.29 ± 11.98)mmol-(m2-d)-1,(178.24 ± 63.34)μmol-(m2-d)-1,以及(-0.74 ± 1.28)μmol-(m2-d)-1,累计排放量分别为 50 770.77、543.52、-4.21 kg-km-2,全球升温潜能值(以 CO2 当量表示)分别为 50 770.77、153.52、-4.21 kg-km-2、-4.21 kg-km-2。分别为 50 770.77、15 218.49、-1 254.48 kg-km-2。在研究期间,岱海湖是大气中二氧化碳和甲烷的源,但却是一氧化二氮的汇。相关分析和逐步回归分析表明,pH 值和溶解性总固体(TDS)水温(WT)、水深(WD)、风速(WS)、氧化还原电位(ORP)和总氮(TN)。对于一氧化二氮,影响因素是 WT、WS 和 TN。此外,岱海湖的富营养化和盐度特征也影响了温室气体的产生和排放。这项研究有助于深入了解岱海湖等富营养化盐湖的温室气体动态和环境因素。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
[Greenhouse Gas Emissions Characteristics and Driving Factors Analysis in the Eutrophic Saline Lake Daihai Lake].

To investigate the greenhouse gas emission characteristics and driving factors of eutrophic saline lakes in northern China, considering Daihai Lake in Inner Mongolia as an example, 10 monitoring sites were selected based on hydrological distribution characteristics in April, July, and October 2023. Using headspace gas chromatography and modeling methods, dissolved concentrations and exchange fluxes of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) were determined in the nearshore zone, open lake area, and lake center surface water. During the study period, Daihai Lake exhibited significant seasonal variations in greenhouse gas concentration and flux. The average concentrations of CO2, CH4, and N2O in surface water were (26.52 ± 17.58) μmol·L-1, (282.30 ± 172.30) nmol·L-1, and (9.09 ± 1.64) nmol·L-1, respectively. The average fluxes were (5.29 ± 11.98) mmol·(m2·d)-1, (178.24 ± 63.34) μmol·(m2·d)-1, and (-0.74 ± 1.28) μmol·(m2·d)-1, with cumulative emissions of 50 770.77, 543.52, -4.21 kg·km-2 and a global warming potential (expressed in CO2-equivalent) of 50 770.77, 15 218.49, -1 254.48 kg·km-2. Daihai Lake acted as a source of atmospheric CO2 and CH4 but a sink for N2O during the study period. Correlation and stepwise regression analyses revealed that pH and total dissolved solids (TDS) influenced CO2 concentration and flux, while the factors affecting CH4 were water temperature (WT), water depth (WD), wind speed (WS), oxidation-reduction potential (ORP), and total nitrogen (TN). For N2O, the influencing factors were WT, WS, and TN. Additionally, Daihai Lake's eutrophication and salinity characteristics influenced the generation and emission of greenhouse gases. This study provides insights into the greenhouse gas dynamics and environmental factors in eutrophic saline lakes like Daihai Lake.

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来源期刊
Huanjing Kexue/Environmental Science
Huanjing Kexue/Environmental Science Environmental Science-Environmental Science (all)
CiteScore
4.40
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