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| 冬小麦农田裸温与气温差异分析及其应用 | |
| 引用本文： | 李翠娜,张雪芬,薛红喜,等.冬小麦农田裸温与气温差异分析及其应用[J].气象与环境科学,2015,38(1):7-13. |
| 作者姓名： | 李翠娜 张雪芬 薛红喜 等 |
| 作者单位： | 1. 中国气象局气象探测中心,北京100081;中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室,北京100029;中国科学院大学,北京100049 2. 中国气象局气象探测中心,北京,100081 3. 国家气象中心,北京,100081 |
| 基金项目： | 中国气象局大气探测重点开放实验室开放课题，公益性行业(气象)科研专项 |
| 摘 要： | 以矮秆代表作物冬小麦为研究对象,利用郑州农业气象试验站2010年10月15日—2011年6月2日农田小气候观测的各层裸温、气温、总辐射和覆盖度资料,采用对比差值、温度垂直梯度等方法统计分析,并对温度对比差值和总辐射曝辐量相关关系和温度的垂直梯度分布特征进行了研究,结果表明:25cm、150cm和300cm高度的日平均裸温和气温变化趋势基本一致,其对比差值呈由小变大趋势;各层裸温和气温的日分布符合温度日变化分布的一般规律,垂直梯度变化比较明显;各层对比差值呈单峰分布,峰值出现在正午12时左右;裸温和气温的对比差值与总辐射曝辐量呈线性相关。裸温与气温的垂直梯度变化有很好的一致性,可利用裸温不同层次间垂直梯度变化特征确定气温传感器合理的安装高度;根据麦田裸温垂直梯度变化特征,考虑到温度防辐射罩高度限制,矮秆作物田间小气候气温应在距离地表面25cm、50cm和150cm高度附近分别设置观测层次。 |
| 关 键 词： | 农田小气候 气温 裸温 对比差值 垂直梯度 |
Variance Analysis and Application of the Bare Temperature and Air Temperature for Winter Wheat Field |
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| Li Cuin,Zhang Xuefen,Xue Hongxi,et al.Variance Analysis and Application of the Bare Temperature and Air Temperature for Winter Wheat Field[J].Meteorological and Environmental Sciences,2015,38(1):7-13. | |
| Authors: | Li Cuin Zhang Xuefen Xue Hongxi |
| Abstract: | Based on bare temperature, air temperature, total radiation and coverage data from 15th October 2010 to 2nd June 2011 at Zhengzhou agrometeorological observed station, the relationship between temperature contrast difference and total radiation exposure quantity and vertical gradient variation characters. It was observed that the bare temperatures were consistent with the air temperatures at 25 cm, 150 cm and 300 cm above the ground, and their differences tended to be increasing. The diurnal variations of bare temperature and air temperature were in line with the general rules of the temperature and the vertical gradient distribution was obvious. The differences between bare temperature and air temperature exhibited a unimodal pattern with the peak at 12:00 noon. There was a significant linear correlation between differences and total radiation. The results also showed that the vertical gradient characters of temperature had a good consistency with bare temperature in time. According to bare temperature vertical gradient variation in the wheat field, taking into account the restrictions of radiation shield height, the observation heights should be set at 25 cm, 50 cm and 150 cm above the ground for low crops. |
| Keywords: | crop microclimate air temperature bare temperature contrast difference vertical gradient |
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