不同天气条件下古尔班通古特沙漠南缘梭梭(Haloxylon ammodendron)群落能量通量日变化特征

doi:10.7523/j.issn.2095-6134.2021.04.017

中国科学院大学学报 ›› 2021, Vol. 38 ›› Issue (4): 567-575.DOI: 10.7523/j.issn.2095-6134.2021.04.017

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不同天气条件下古尔班通古特沙漠南缘梭梭(Haloxylon ammodendron)群落能量通量日变化特征

李传金^1,2,3, 胡顺军^1,2

1. 中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室, 乌鲁木齐 830011;
2. 新疆阿克苏农田生态系统国家野外科学观测研究站, 新疆阿克苏 84;
3. 中国科学院大学, 北京 100049

收稿日期:2019-10-15 修回日期:2020-03-19 发布日期:2021-07-10
通讯作者: 胡顺军
基金资助:
新疆水利科技专项（YF2020-08）、国家自然科学基金（41671032）和国家重点基础研究发展计划项目（2013CB429902）资助

Diurnal variation of energy flux of Haloxylon ammodendron community in the southern margin of Gurbantunggut Desert under different weather conditions

LI Chuanjin^1,2,3, HU Shunjun^1,2

1. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
2. Akesu National Station of Observation and Research for Oasis Agro-ecosystem, Akesu 84;
3. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2019-10-15 Revised:2020-03-19 Published:2021-07-10

摘要/Abstract

摘要： 基于2018年夏季在古尔班通古特沙漠南缘采用波文比系统实测的气象及能量资料，分析该区不同天气条件下梭梭群落能量特征及能量分配的日变化特征。结果表明：1）该区夏季晴天和多云天各能量曲线变化趋势基本一致，呈单峰型，土壤热通量最小，晴天和多云天感热略高于潜热；阴天能量传输以感热为主；雨天整体热通量最小，且各能量曲线呈多峰形变化，能量传输以潜热为主。2）白天，波文比值雨天最小，且小于1，晴天、多云天、阴天依次增大，且大于1；夜间，晴天、阴天、多云天、雨天的波文比值依次增大，均小于1。3）不同天气条件下能量分配曲线白天变化平稳，夜间波动显著，日出和日落前后波动最为剧烈；因不同天气条件下辐射强度和日照时数的不同，曲线早、晚剧烈变化开始时间有所不同。

关键词: 能量平衡, 能量分配, 荒漠植物群落, 波文比, 天气条件

Abstract: Based on the meteorological and energy data measured by the Bowen ratio system on the southern edge of the Gurbantunggut Desert in the summer of 2018, the diurnal variation of the energy exchange and its components of the Haloxylon ammodendron community under different weather conditions was analyzed. The results show:1) The diurnal curve of energy exchange is highly similar unimodal type in sunny and cloudy days in this area. Soil heat flux is the smallest, while sensible heat is slightly higher than latent heat in sunny and partly cloudy days. In cloudy days sensible heat energy transfer is the main component. In rainy days, the overall heat flux is the smallest and characterized by multi-modal curve, in which latent heat transmission is the dominated component. 2) The daytime Bowen ratio is below 1 and the smallest in rainy days. It exceeds 1 in other three weather conditions, increasing from sunny, partly cloudy to cloudy days. During nighttime, the Bowen ratios are lower than 1 in all the days, increasing from sunny, cloudy, partly cloudy to rainy days. 3) The energy partitioning curve is relatively stable in daytime and unstable during nighttime. It fluctuates dramatically in twilight, which differs in starting time among the diverse weather conditions.

Key words: energy balance, energy partitioning, desert community, Bowen ratio, weather condition

中图分类号:

P933

李传金, 胡顺军. 不同天气条件下古尔班通古特沙漠南缘梭梭(Haloxylon ammodendron)群落能量通量日变化特征[J]. 中国科学院大学学报, 2021, 38(4): 567-575.

LI Chuanjin, HU Shunjun. Diurnal variation of energy flux of Haloxylon ammodendron community in the southern margin of Gurbantunggut Desert under different weather conditions[J]. Journal of University of Chinese Academy of Sciences, 2021, 38(4): 567-575.

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不同天气条件下古尔班通古特沙漠南缘梭梭(Haloxylon ammodendron)群落能量通量日变化特征

Diurnal variation of energy flux of Haloxylon ammodendron community in the southern margin of Gurbantunggut Desert under different weather conditions

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