典型草原区草地潜热通量特征

doi:10.11924/j.issn.1000-6850.2013-3073

摘要/Abstract

摘要： 为研究局地小气候和草地生态系统变化提供依据。利用2010年6月1日—8月31日开路涡度相关系统和常规气象观测系统资料，分析锡林浩特典型草原区草地潜热通量变化特征及其与环境因子的关系。结果表明，6—8月总体能量平衡闭合很好，闭合度达83.9%。晴天闭合度为81.4%，阴天闭合度为95.0%，处于国内外同类观测闭合度范围的上等水平；潜热通量日变化呈单峰型二次曲线，日出后逐渐升高，中午左右达到峰值，然后逐渐降低，日落后趋于稳定。晴天和阴天的潜热通量日变化趋势相同，但阴天波动性较大，变幅大于晴天，且峰值滞后于晴天；潜热通量与净辐射、气温、地表温度、地表温度与气温差、呈极显著正相关，与相对湿度呈极显著负相关，而与水平风速的相关性相对较弱。其中，净辐射是最大的影响因素。

关键词: 过氧化氢酶, 过氧化氢酶

Abstract: In order to study the microclimate and provide the basis for changes in grassland ecosystems. Using the June 1-August 31, 2010 open eddy covariance systems and conventional meteorological observation system data, the author analyzed latent heat flux change in Xilinhaote typical steppe grassland and its relationship with environmental factors. The results showed that: June to August overall energy balance closured good closure of 83.9%. Sunny closure was 81.4%, 95.0% cloudy closure, in a range of domestic and foreign similar observation closure of the upper level; latent heat flux. Unimodal quadratic curve, increased gradually after sunrise, around noon reached a peak, and then gradually decreased after sunset stabilized. Sunny and cloudy days latent heat fluxes same trend, but overcast mobility greater amplitude than sunny, and the peak lag sunny; latent heat flux and net radiation, air temperature, surface temperature, surface temperature and the temperature difference, was significantly positively correlated with the relative humidity was significantly negatively correlated with horizontal wind speed correlation was relatively weak. Net radiation which was the biggest factor.

贺俊杰. 典型草原区草地潜热通量特征[J]. 中国农学通报, 2014, 30(26): 195-199.

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杰 .典型草原区草地潜热通量特征.中国农学通报 ,2014,30(第26期9月): 195-199