低丘红壤区农田水热通量变化特征及气候学足迹

发布时间：2018-06-18 05:20

本文选题：水热通量 + 大孔径闪烁仪　；参考：《应用生态学报》2017年01期

【摘要】：农田水热通量的变化特征以及气候学足迹分析对加强区域气候资源管理和提高红壤地区水热资源利用率有重要意义.利用低丘红壤区的大孔径闪烁仪和自动气象站数据,在保证数据质量的基础上,详细分析了低丘红壤区农田在非雨季、作物生长旺期不同时间尺度水热通量的变化特征和观测通量的源区分布特征.结果表明:水热通量的日变化呈单峰型,但与晴天相比较,多云天的日变化曲线波动更为复杂;无论是旬尺度还是月尺度,8月的水热通量整体上都大于9月,且净辐射通量都更多地用于潜热交换,但9月潜热通量所占净辐射比例相较于8月有所减少,感热通量则相反;受气象条件(尤其是风)、稳定度和下垫面状况影响,不同时间尺度的观测通量源区特征不同;结合下垫面作物来看,不同时间尺度源区的通量贡献来源也不同.
[Abstract]:The variation characteristics of farmland water and heat flux and the analysis of climatological footprint are of great significance for strengthening the management of regional climate resources and improving the utilization ratio of water and heat resources in red soil areas. Based on the data of large aperture scintillation instrument and automatic weather station in low hilly red soil region, on the basis of ensuring the data quality, the farmland in low hilly red soil region is analyzed in detail during the non-rainy season. The variation characteristics of water and heat flux and the distribution of observed flux in different time scales during the peak period of crop growth. The results show that the diurnal variation of water and heat flux is monomorphic, but the diurnal variation curve of cloudy days is more complex than that of sunny days, and the water and heat flux in August is larger than that in September, both on a ten-day scale and on a monthly scale. Moreover, the net radiation flux is mostly used for latent heat exchange, but the proportion of net radiation flux in September is lower than that in August, and the sensible heat flux is opposite, which is affected by meteorological conditions (especially wind, stability and underlying surface condition). The characteristics of observed flux sources are different in different time scales, and the sources of flux contribution are also different in different time scales combined with underlying surface crops.
【作者单位】：气象灾害预报预警与评估协同创新中心;江苏省农业气象重点实验室;南京信息工程大学应用气象学院;
【基金】：国家自然科学基金项目(41575111;41175098) 第九批“六大人才高峰”高层次人才项目(NY-038)资助~~
【分类号】：S162

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