西藏高原高寒草甸能量平衡闭合研究

doi:10.11849/zrzyxb.2008.03.005

自然资源学报 ›› 2008, Vol. 23 ›› Issue (3): 391-399.doi: 10.11849/zrzyxb.2008.03.005

西藏高原高寒草甸能量平衡闭合研究

李泉^1,2, 张宪洲¹, 石培礼¹, 何永涛¹, 徐玲玲^1,2, 孙维^1,2

1. 中国科学院地理科学与资源研究所, 北京100101;
2. 中国科学院研究生院, 北京100049

收稿日期:2007-03-12 修回日期:2007-12-17 出版日期:2008-05-28 发布日期:2008-05-28
作者简介:李泉(1984-),男,山西阳泉人,硕士,主要从事生态学研究。E-mai:lliq.05s@igsnrr.ac.Cn
基金资助:
国家重要基础研究项目(2005CB422005);中国科学院知识创新工程重要方向性项目(KSCXZ-YW-N-44);国家科技支撑项目(2006BAC01A04)

Study on the Energy Balance Closure of Alpine Meadow on Tibetan Plateau

LI Quan^1,2, ZHANG Xian-zhou¹, SHI Pei-li¹, HE Yong-tao¹, XU Ling-ling^1,2, SUN Wei^1,2

1. Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China;
2. Graduate University of Chinese Academy of Sciences,Beijing 100049,China

Received:2007-03-12 Revised:2007-12-17 Online:2008-05-28 Published:2008-05-28

摘要/Abstract

摘要： 运用OLS线性回归和计算EBR能量平衡比率的方法,以当雄草原站2003~2005年的通量数据为基础,对西藏高寒草原的能量平衡闭合状况进行了研究。研究结果表明,当雄草原站存在着能量不完全闭合的现象,OLS线型回归斜率偏低。生长季能量闭合状况好于非生长季,白天好于夜晚,晴天好于阴天和雨雪天气。随后对能量不闭合的原因进行了初步分析。将潜热通量、显热通量以及土壤热通量的时间提前后,能量闭合程度提高。得出结论,由于热量传输速率的差别,在很大程度上影响了能量的闭合。其他原因如采样的误差与仪器的误差、高频和低频的损失、其他能量项的忽略、平流的损失,也造成了部分能量的不闭合。

关键词: 涡度相关, 能量平衡闭合, OLS回归斜率, 高寒草甸

Abstract: Through adopting the means of OLS Linearity return and calculating EBR energy balance,and based on the three-year flux amount data of Damxung rangeland station,we conducted a research on the energy balance closure aiming at the Tibet Plateau alpine meadow.The results show that,there exists a phenomenon of in-complete closure of energy and the slope of OLS curve is relatively low.The closure condition of energy balance in growing season is better than that in non-growing season;day-time is better than night;fine day is better than windy,rainy or snowy days.Later on,we have an analysis on the reason in energy in-closure.When the time of latent heat fluxes,sensible heat fluxes and soil heat fluxes is advanced,the closure condition of energy balance is improved.We draw a conclusion that the difference in the rate of heat transference has a great impact on the energy balance closure.Other reasons as the deviations in samples and instrument,the loss of high frequency and low frequency,the ignorance of some energy item and loss of advection have also contributed to the in-closure of energy balance.

Key words: eddy covariance, energy balance closure, the slope of OLS, alpine meadow

中图分类号:

S718.5??

李泉, 张宪洲, 石培礼, 何永涛, 徐玲玲, 孙维. 西藏高原高寒草甸能量平衡闭合研究[J]. 自然资源学报, 2008, 23(3): 391-399.

LI Quan, ZHANG Xian-zhou, SHI Pei-li, HE Yong-tao, XU Ling-ling, SUN Wei. Study on the Energy Balance Closure of Alpine Meadow on Tibetan Plateau[J]. JOURNAL OF NATURAL RESOURCES, 2008, 23(3): 391-399.

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西藏高原高寒草甸能量平衡闭合研究

Study on the Energy Balance Closure of Alpine Meadow on Tibetan Plateau

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