干旱区生态环境知识资源中心(Arid): Evapotranspiration controls across spatial scales of heterogeneity

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DOI	10.1002/qj.4527
	Evapotranspiration controls across spatial scales of heterogeneity
	Mangan, Mary Rose; Hartogensis, Oscar; van Heerwaarden, Chiel; de Arellano, Jordi Vila-Guerau
通讯作者	Mangan, MR
来源期刊	QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
ISSN	0035-9009
EISSN	1477-870X
出版年	2023
卷号	149 期号:756 页码:2696-2718
英文摘要	In semi-arid regions where irrigation causes thermal surface heterogeneities, evapotranspiration is controlled not only by the land surface but also by the interaction between the surface and the atmospheric boundary layer. The spatial scale of heterogeneity impacts the processes that drive the diurnal variability of evapotranspiration. In this study, we combine data with a conceptual, coupled land-atmosphere model to study the drivers of evapotranspiration across spatial scales of heterogeneity for the Land Interactions with the Atmosphere in the Iberian Semi-arid Environment (LIAISE) field campaign. We use a latent heat tendency equation as a diagnostic tool to quantify the contributions of various surface- and boundary-layer driven processes on surface latent heat flux. We define the following spatial scales based on surface characteristics: regional, landscape, and local. We find that, at the regional and landscape scales (>$$ > $$1 km), the feedback mechanisms between the surface fluxes and the resulting boundary-layer dynamics enhance the daily latent heat flux by 64% to 77%. Conversely, at the local scale (& SIM;$$ \sim $$100 m), surface-driven processes are most important for governing evapotranspiration. At the local scale, we find that the energy stored at the surface enhances evaporation in the late afternoon, which could explain the observed time lag between net radiation and latent heat flux. Furthermore, the combined effects of entrainment at the boundary-layer top and advection of heat and moisture enhance daily latent heat by 27% at the regional scale to 43% at the local scale. This analysis also has implications for the land-surface modelling community. It suggests that properly reproducing evapotranspiration to capture the relevant processes depends on capacity of the model to resolve the interaction of scales in surface heterogeneous conditions.
英文关键词	atmospheric boundary layer evapotranspiration land-surface models surface heterogeneity
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001045144900001
WOS关键词	IMBALANCE PROBLEM ; ENERGY IMBALANCE ; SURFACE ; EVAPORATION ; PARAMETERIZATION ; ENTRAINMENT ; SENSITIVITY ; INVERSION ; ADVECTION ; MODEL
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398190
推荐引用方式 GB/T 7714	Mangan, Mary Rose,Hartogensis, Oscar,van Heerwaarden, Chiel,et al. Evapotranspiration controls across spatial scales of heterogeneity[J],2023,149(756):2696-2718.
APA	Mangan, Mary Rose,Hartogensis, Oscar,van Heerwaarden, Chiel,&de Arellano, Jordi Vila-Guerau.(2023).Evapotranspiration controls across spatial scales of heterogeneity.QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY,149(756),2696-2718.
MLA	Mangan, Mary Rose,et al."Evapotranspiration controls across spatial scales of heterogeneity".QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 149.756(2023):2696-2718.