DOI: 10.5194/hess-18-1761-2014
Scopus记录号: 2-s2.0-84900832235
论文题名: Simulation of semi-arid biomass plantations and irrigation using the WRF-NOAH model – A comparison with observations from Israel
作者: Branch O ; , Warrach-Sagi K ; , Wulfmeyer V ; , Cohen S
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 5 起始页码: 1761
结束页码: 1783
语种: 英语
Scopus关键词: Arid regions
; Evapotranspiration
; Heat flux
; Irrigation
; Landforms
; Surface measurement
; Desert conditions
; High evaporation rate
; Irrigation schemes
; Parameter validation
; Sensible heat flux
; Surface radiation
; Vapour pressure deficits
; Vegetation condition
; Computer simulation
; biogeochemical cycle
; biomass
; energy balance
; estimation method
; evapotranspiration
; irrigation
; land surface
; MODIS
; semiarid region
; simulation
; Israel
英文摘要: A 10 × 10 km irrigated biomass plantation was simulated in an arid region of Israel to simulate diurnal energy balances during the summer of 2012 (JJA). The goal is to examine daytime horizontal flux gradients between plantation and desert. Simulations were carried out within the coupled WRF-NOAH atmosphere/land surface model. MODIS land surface data was adjusted by prescribing tailored land surface and soil/plant parameters, and by adding a controllable sub-surface irrigation scheme to NOAH. Two model cases studies were compared - Impact and Control. Impact simulates the irrigated plantation. Control simulates the existing land surface, where the predominant land surface is bare desert soil. Central to the study is parameter validation against land surface observations from a desert site and from a 400 ha Simmondsia chinensis (jojoba) plantation. Control was validated with desert observations, and Impact with Jojoba observations. Model evapotranspiration was validated with two Penman-Monteith estimates based on the observations.Control simulates daytime desert conditions with a maximum deviation for surface 2 m air temperatures (T2) of 0.2 °C, vapour pressure deficit (VPD) of 0.25 hPa, wind speed (U) of 0.5 ms-1, surface radiation (Rn) of 25 W m-2, soil heat flux (G) of 30 Wm-2 and 5 cm soil temperatures (ST5) of 1.5 °C. Impact simulates irrigated vegetation conditions with a maximum deviation for T2 of 1-1.5 °C, VPD of 0.5 hPa, U of 0.5 ms-1, Rn of 50 Wm-5, G of 40 Wm -2 and ST5 of 2 °C. Latent heat curves in Impact correspond closely with Penman-Monteith estimates, and magnitudes of 160 W m-2 over the plantation are usual. Sensible heat fluxes, are around 450 Wm -2 and are at least 100-110 W m-2 higher than the surrounding desert. This surplus is driven by reduced albedo and high surface resistance, and demonstrates that high evaporation rates may not occur over Jojoba if irrigation is optimized. Furthermore, increased daytime T2 over plantations highlight the need for hourly as well as daily mean statistics. Daily mean statistics alone may imply an overall cooling effect due to surplus nocturnal cooling, when in fact a daytime warming effect is observed. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78247
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Physics and Meteorology, University of Hohenheim, Stuttgart, Germany; Institute of Soil, Water and Environmental Sciences, Agricultural Research Organization, Volcani Center, Bet-Dagan, Israel
Recommended Citation:
Branch O,, Warrach-Sagi K,, Wulfmeyer V,et al. Simulation of semi-arid biomass plantations and irrigation using the WRF-NOAH model – A comparison with observations from Israel[J]. Hydrology and Earth System Sciences,2014-01-01,18(5)