Abstract
The Yellow River is the second largest river in China, and the provinces and cities affected by the Yellow River are called the Yellow River Basin influence area. The relationship between land use and surface thermal effects in the influence area of the Yellow River Basin from 2000 to 2015 was analyzed using MODIS remote sensing data and an energy balance algorithm. The results showed that: (1) net radiation and latent heat flux both increased, and the high value areas were located in the urban expansion areas and natural and seminatural areas, respectively; (2) net surface energy intake showed a upward trend, and increased as the intensity of human influence increased, indicating that human activities had strengthed the positive trend of net surface energy intake and increased the warming effect; (3) net radiation had a greater impact on surface energy intake than latent heat flux, and this relationship was more obvious in land use types that were greatly affected by human activities. This study emphasizes the difference in energy budgets of different land use types under the influence of human activities. It provides a theoretical basis for judging the climate change trend and urban heat island effect in the influence area of the Yellow River Basin from the perspective of biogeophysics.
Highlights
The surface energy exchange process is a link between land–air energy conversions and is characterized by surface radiation and the thermal balance which are closely related to solar radiation, ecological change and human activities [1,2]
Since the mechanism of the surface energy balance is complicated, to estimate the surface energy budget processes under various land use types or conditions, other variables are needed that can reflect the effect caused by surface albedo and the latent heat flux (LE) [4], such as the land use and cover change (LUCC) and land surface temperature (LST)
According to the different levels of human influences, the land use types in the influence area of the Yellow River Basin (YRB) were divided into five categories: old urban areas, cultivated lands, natural and semi-natural areas, urban expansion areas and mixed pixel areas
Summary
The surface energy exchange process is a link between land–air energy conversions and is characterized by surface radiation and the thermal balance which are closely related to solar radiation, ecological change and human activities [1,2]. The impact of these natural or anthropogenic factors on climate change is mainly realized through variations in surface radiation and the energy balance. As one of the important parameters of land surface process models and climate models [6], small changes in surface albedo, such as a global planetary albedo change of 5%, can profoundly affect the surface energy balance and global surface temperature [7,8]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
