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低丘红壤区农田水热通量变化特征及气候学足迹
引用本文:李阳,景元书,秦奔奔.低丘红壤区农田水热通量变化特征及气候学足迹[J].生态学杂志,2017,28(1):180-190.
作者姓名:李阳  景元书  秦奔奔
作者单位:1.气象灾害预报预警与评估协同创新中心, 南京 210044;2.江苏省农业气象重点实验室, 南京 210044;3.南京信息工程大学应用气象学院, 南京 210044
基金项目:本文由国家自然科学基金项目(41575111、41175098)和第九批“六大人才高峰”高层次人才项目(NY-038)资助
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.

关 键 词:水热通量  大孔径闪烁仪  农田  气候学足迹
收稿时间:2016-07-21

Characteristics of water and heat fluxes and its footprint climatology on farmland in low hilly region of red soil
LI Yang,JING Yuan-shu,QIN Ben-ben.Characteristics of water and heat fluxes and its footprint climatology on farmland in low hilly region of red soil[J].Chinese Journal of Ecology,2017,28(1):180-190.
Authors:LI Yang  JING Yuan-shu  QIN Ben-ben
Institution:1.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing 210044, China;2.Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing 210044, China;3.Institute of Applied Meteorology, Nanjing University of Information Science &Technology, Nanjing 210044, China
Abstract:The analysis of the characteristics and footprint climatology of farmland water and heat fluxes has great significance to strengthen regional climate resource management and improve the hydrothermal resource utilization in the region of red soil. Based on quality controlled data from large aperture scintillometer and automatic meteorological station in hilly region of red soil, this paper analyzed in detail the characteristics of farmland water and heat fluxes at different temporal scales and the corresponding source area distribution of flux measurement in the non-rainy season and crop growth period in hilly region of red soil. The results showed that the diurnal variation of water and heat fluxes showed a unimodal trend, but compared with the sunny day, the diurnal variation curves fluctuated more complicatedly on cloudy day. In the whole, either ten-day periods or month scale, the water and heat fluxes were greater in August than in September, while the net radiation flux was more distributed to latent heat exchange. The proportion of net radiation to latent heat flux decreased in September compared to August, but the sensible heat flux was vice versa. With combined effects of weather conditions (particularly wind), stability, and surface condition, the source areas of flux measurement at different temporal scales showed different distribution characteristics. Combined with the underlying surface crops, the source areas at different temporal scales also had different contribution sources.
Keywords:water and heat fluxes  large aperture scintillometer  farmland  footprint climatology
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