干旱区生态环境知识资源中心(Arid): Evaluating the Met Office Unified Model land surface temperature in Global Atmosphere/Land 3.1 (GA/L3.1), Global Atmosphere/Land 6.1 (GA/L6.1) and limited area 2.2 km configurations

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DOI	10.5194/gmd-12-1703-2019
	Evaluating the Met Office Unified Model land surface temperature in Global Atmosphere/Land 3.1 (GA/L3.1), Global Atmosphere/Land 6.1 (GA/L6.1) and limited area 2.2 km configurations
	Brooke, Jennifer K.1; Harlow, R. Chawn 1; Scott, Russell L.2; Best, Martin J.1; Edwards, John M.1; Thelen, Jean-Claude 1; Weeks, Mark 1
通讯作者	Brooke, Jennifer K.
来源期刊	GEOSCIENTIFIC MODEL DEVELOPMENT
ISSN	1991-959X
EISSN	1991-9603
出版年	2019
卷号	12 期号:4 页码:1703-1724
英文摘要	A limitation of the Met Office operational data assimilation scheme is that surface-sensitive infrared satellite sounding channels cannot be used during daytime periods where numerical weather prediction (NWP) model background land surface temperature (LST) biases are greater than 2 K in magnitude. The Met Office Unified Model (UM) has a significant cold LST bias in semi-arid regions when compared with satellite observations; a range of UM configurations were assessed with different model resolutions, land surface cover datasets and bare soil parameterisations. UM LST biases were evaluated at global resolution and in a limited area model (LAM) at a 2.2 km resolution over the SALSTICE (Semi-Arid Land Surface Temperature and IASI Calibration Experiment) experimental domain in south-eastern Arizona. This validation is in conjunction with eddy-covariance flux tower measurements. LST biases in the Global Atmosphere/Land 3.1 (GA/L3.1) configuration were largest in the mid-morning with respect to Moderate Resolution Imaging Spectroradiometer (MODIS) Terra (-13.6 +/- 2.8 K at the Kendall Grassland site). The diurnal cycle of LST in Global Atmosphere/Land 6.1 (GA/L6.1) showed a significant improvement relative to GA/L3.1 with the cold LST biases reduced to -1.4 +/- 2.7K and -3.6 +/- 3.0 K for Terra and Aqua overpasses, respectively. The higher-resolution LAM showed added value over the global configurations. The spatial distribution of the LST biases relative to MODIS and the modelled bare soil cover fraction were found to be moderately correlated (0.61 +/- 0.08) during the daytime, which suggests that regions of cold LST bias are associated with low bare soil cover fraction. Coefficients of correlation with the shrub surface fractions followed the same trend as the bare soil cover fraction, although with a less significant correlation (0.36 +/- 0.09), and indicated that the sparse vegetation canopies in south-eastern Arizona are not well represented in UM ancillary datasets. The x component of the orographic slope was positively correlated with the LST bias (0.41 +/- 0.05 for MODIS Aqua) and identified that regions of cold model LST bias are found on easterly slopes, and regions of warm model LST bias are found on westerly slopes. An overestimate in the modelled turbulent heat and moisture fluxes at the eddy-covariance flux sites was found to be coincident with an underestimate in the ground heat flux.
类型	Article
语种	英语
国家	England ; USA
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000466422400001
WOS关键词	ENVIRONMENT SIMULATOR JULES ; RADIANCE-BIAS CORRECTION ; ENERGY-BALANCE CLOSURE ; ASSIMILATION ; VALIDATION ; IMPACT ; REPRESENTATION ; FLUX
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216049
作者单位	1.Met Off, Fitzroy Rd, Exeter EX1 3PB, Devon, England; 2.USDA ARS, Southwest Watershed Res Ctr, 2000 E Allen Rd, Tucson, AZ 85719 USA
推荐引用方式 GB/T 7714	Brooke, Jennifer K.,Harlow, R. Chawn,Scott, Russell L.,et al. Evaluating the Met Office Unified Model land surface temperature in Global Atmosphere/Land 3.1 (GA/L3.1), Global Atmosphere/Land 6.1 (GA/L6.1) and limited area 2.2 km configurations[J],2019,12(4):1703-1724.
APA	Brooke, Jennifer K..,Harlow, R. Chawn.,Scott, Russell L..,Best, Martin J..,Edwards, John M..,...&Weeks, Mark.(2019).Evaluating the Met Office Unified Model land surface temperature in Global Atmosphere/Land 3.1 (GA/L3.1), Global Atmosphere/Land 6.1 (GA/L6.1) and limited area 2.2 km configurations.GEOSCIENTIFIC MODEL DEVELOPMENT,12(4),1703-1724.
MLA	Brooke, Jennifer K.,et al."Evaluating the Met Office Unified Model land surface temperature in Global Atmosphere/Land 3.1 (GA/L3.1), Global Atmosphere/Land 6.1 (GA/L6.1) and limited area 2.2 km configurations".GEOSCIENTIFIC MODEL DEVELOPMENT 12.4(2019):1703-1724.