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[1]HUANG Tianyu,LIU Tingxi,WANG Guanli,et al.Dynamic Changes of Water and Heat Fluxes and Responses to Environmental Factors in Cascade Ecological Zone[J].Research of Soil and Water Conservation,2019,26(03):122-127,134.

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Dynamic Changes of Water and Heat Fluxes and Responses to Environmental Factors in Cascade Ecological Zone

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 03 Page number: 122-127,134 Column: Public date: 2019-04-12

Title:: Dynamic Changes of Water and Heat Fluxes and Responses to Environmental Factors in Cascade Ecological Zone

Author(s):: HUANG Tianyu¹, LIU Tingxi^1,2, WANG Guanli^1,2, DUAN Limin^1,2, CHEN Xiaoping¹; 1. Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot 010018, China;
2. Inner Mongolia Key Laboratory of Water Resource Protection and Utilization, Hohhot 010018, China

Keywords:: water and heat flux; dynamic changes; correlation analysis; large aperture scintillometer; complex underlying surface

CLC:: P404

DOI:: -

Abstract:: The water and heat fluxes in the atmospheric boundary layer play a very important role in the climate system. The large aperture scintillometer (LAS) and meteorological observed data were used to analysis the water and heat fluxes of the cascade ecological zone in Horqin sandy land from March 2017 to December 2017. The response relationship between the water and heat fluxes and the main environmental factors was also analyzed. The results showed that:(1) diurnal variation of the water and heat fluxes in the study period in Horqin sandy land experimentation area was obvious; the sensible heat flux in the sunny days showed a significant single peak and the latent heat flux in the sunny days showed two peaks in growing seasons and one peak in non-growing seasons, which was similar to the homogeneous underlying surface; the sensible heat flux and the latent heat flux showed no significant changes in the cloudy days; the soil heat flux showed a stable lag in the whole research period compared with the net radiation; (2) the seasonal variation of water and heat fluxes in the cascade ecosystem of Horqin sandy land was significant; the peak time of the monthly fluxes curve moved backward first and then moved forward, which was in conformity with the seasonal variation principle; the sensible heat flux accounted for a larger proportion of net radiation in the non-growing season and the proportion decrease in the growing season; the latent heat flux accounted for the largest proportion of net radiation in the whole research period and it was the main form of energy consumption near the ground; (3) solar radiation, air temperature, relative humidity of air and other meteorological factors showed pretty good correlation with the water and heat fluxes; the correlation between 10 cm soil layer and the water and heat fluxes was the best in all layers of soil. Soil factors like soil temperature and soil moisture content were significantly correlated with the water and heat fluxes; the correlation between soil electrical conductivity and the water and heat fluxes is not obvious.

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