| 神农架大九湖泥炭湿地能量通量及平衡分析 |
| Energy Flux and Balance Analysis of Dajiuhu Peatland in Shennongjia |
| 投稿时间：2017-07-09 修订日期：2019-07-16 |
| DOI：10.15928/j.1674-3075.2019.04.003 |
| 中文关键词:泥炭地 能量通量 涡度协方差 大九湖 |
| 英文关键词:peatland energy flux eddy covariance Dajiuhu peatland |
| 基金项目:中国地质大学（武汉）中央高校基本科研业务费专项（1323521225，1323521325）；环境保护 部生态环境十年变化遥感调查与评估项目（2012046151；2012046395） |
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| 中文摘要: |
| 研究大九湖泥炭湿地通量，为准确评估泥炭地生态系统与大气间的物质和能量交换提供基础数据。利用涡度相关系统对神农架大九湖2015年9月~2016年8月的净辐射、显热通量、潜热通量及土壤热通量进行了为期1年的连续观测。结果表明：1）泥炭地全年净辐射为3146.91MJ/m2，显热通量为931.79MJ/m2，潜热通量为1762.40MJ/m2，土壤热通量为22.26MJ/m2；能量分配主要以潜热为主，占净辐射的56%。潜热通量为能量散失的主要形式，土壤表现为热汇。2）各能量分量季节变化明显，10月、1月、4月及7月的日变化均以净辐射为基础，呈相似的单峰型曲线变化。3）波文比逐月变化不规律，月平均波文比为0.65、波动在0.34~1.06，年波文比为0.53，全年能量分配潜热通量大于显热通量。4）神农架大九湖泥炭地年能量闭合度为0.86，存在14%的能量不闭合。不闭合的原因可能与下垫面状况、季节变化及平流的影响产生的波动等相关。采用涡度相关法测得的神农架大九湖泥炭地的通量观测数据可靠，对能量平衡特征驱动因子的确定及分析仍需进一步研究。 |
| 英文摘要: |
| Wetlands play an important role in the energy exchange between the earth’s surface and atmosphere, and affect other ecological processes such as water cycle and plant growth. Wetland hydrology and ecological function depend on the local energy balance and measuring the energy balance is an effective means of assessing the water conservation and carbon storage potential of wetlands. In this study, the distribution of energy components and seasonal variation of the energy fluxes in Dajiuhu peatland were analyzed based on one-year of turbulent energy flux data, automatically measured by an eddy covariance system from September 2015 to August 2016. The aim of the study was to evaluate the quality of the monitoring data by the eddy covariance system and provide basic data on the energy exchange between the peatland ecosystem and the atmosphere. Results show: (1) The annual net radiation of peatland, yearly sensible heat flux, latent heat flux and soil heat flux, were, respectively, 3146.91 MJ/m2, 931.79 MJ/m2 , 1762.40 MJ/m2 and 22.26 MJ/m2. The latent heat flux accounted for 56% of the net radiation, indicating that latent heat flux is the main source of energy loss in this ecosystem, and the peatland soil acts as a heat-sink. (2) The energy components clearly varied with season, and the diurnal change of the energy components in October, January, April, and July displayed a similar unimodal curve, based on net radiation. (3) Monthly variation of the Bowen ratio was irregular. The monthly Bowen ratio was in the range of 0.34 -1.06, averaging 0.65 and the annual Bowen ratio was 0.53. The latent heat flux dominated the yearly energy budget and was significantly higher than the sensible heat flux. (4) The yearly energy closure of the peatland in Shennongjia was 0.86. The energy imbalance may result from the condition of the underlying surface, seasonal changes and the effects of advection. The results of this study are consistent with research results at home and abroad, indicating that the energy fluxes in the Dajiuhu peatland measured by the eddy correlation method are reliable. We recommend continued study of the driving factors of energy balance in peatlands. |
| 周颖,葛继稳,彭凤姣,李艳元,李金群,李永福,翁文畅.2019.神农架大九湖泥炭湿地能量通量及平衡分析[J].水生态学杂志,40(4):14-21. |
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