An Observational and Modeling Study of Characteristics of Urban Heat Island and Boundary Layer Structures in Beijing
Tóm tắt
In this paper, the characteristics of urban heat island (UHI) and boundary layer structures in the Beijing area, China, are analyzed using conventional and Moderate Resolution Imaging Spectroradiometer (MODIS) observations. The Weather Research and Forecasting (WRF) model coupled with a single-layer urban canopy model (UCM) is used to simulate these urban weather features for comparison with observations. WRF is also used to test the sensitivity of model simulations to different urban land use scenarios and urban building structures to investigate the impacts of urbanization on surface weather and boundary layer structures. Results show that the coupled WRF/Noah/UCM modeling system seems to be able to reproduce the following observed features reasonably well: 1) the diurnal variation of UHI intensity; 2) the spatial distribution of UHI in Beijing; 3) the diurnal variation of wind speed and direction, and interactions between mountain–valley circulations and UHI; 4) small-scale boundary layer convective rolls and cells; and 5) the nocturnal boundary layer lower-level jet. The statistical analyses reveal that urban canopy variables (e.g., temperature, wind speed) from WRF/Noah/UCM compare better with surface observations than the conventional variables (e.g., 2-m temperature, 10-m wind speed). Both observations and the model show that the airflow over Beijing is dominated by mountain–valley flows that are modified by urban–rural circulations. Sensitivity tests imply that the presence or absence of urban surfaces significantly impacts the formation of horizontal convective rolls (HCRs), and the details in urban structures seem to have less pronounced but not negligible effects on HCRs.
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Tài liệu tham khảo
Atkinson, 1996, Mesoscale shallow convection in the atmosphere., Rev. Geophys., 34, 403, 10.1029/96RG02623
Bornstein, 1968, Observations of the urban heat island effects in New York City., J. Appl. Meteor., 7, 575, 10.1175/1520-0450(1968)007<0575:OOTUHI>2.0.CO;2
Bornstein, 1987, Mean diurnal circulation and thermodynamic evolution of urban boundary layer.
Brown, 2000, Urban parameterizations for mesoscale meteorological models.
Burian, 2002, Morphological analysis using 3D building databases.
Chen, 2001, Coupling an advanced land surface–hydrology model with the Penn State-NCAR MM5 modeling system. Part I: Model implementation and sensitivity., Mon. Wea. Rev., 129, 569, 10.1175/1520-0493(2001)129<0569:CAALSH>2.0.CO;2
Chen, 2004, Utilizing the coupled WRF/LSM/Urban modeling system with detailed urban classification to simulate the urban heat island phenomena over the Greater Houston area.
Chen, 2006, Current status of urban modeling in the community Weather Research and Forecast (WRF) model.
Chen, 2005, Pollution property of particulates in the air at the traffic crossing in Beijing, Part I: Pollution property of particulates in the air and its affecting factors., Res. Environ. Sci., 18, 34
Coceal, 2005, Mean winds through an inhomogeneous urban canopy., Bound.-Layer Meteor., 115, 47, 10.1007/s10546-004-1591-4
Cox, 1998, Mesoscale model intercomparison., Bull. Amer. Meteor. Soc., 79, 265, 10.1175/1520-0477(1998)079<0265:AMMI>2.0.CO;2
Dudhia, 1989, Numerical study of convection observed during the winter monsoon experiment using a mesoscale two-dimensional model., J. Atmos. Sci., 46, 3077, 10.1175/1520-0469(1989)046<3077:NSOCOD>2.0.CO;2
Dupont, 2004, Simulation of meteorological fields within and above urban and rural canopies with a mesoscale model., Bound.-Layer Meteor., 113, 111, 10.1023/B:BOUN.0000037327.19159.ac
Ek, 2003, Implementation of Noah land surface model advances in the National Centers for Environmental Prediction operational mesoscale Eta model., J. Geophys. Res., 108, 8851, 10.1029/2002JD003296
Etling, 1993, Roll vortices in the planetary boundary layer: A review., Bound.-Layer Meteor., 65, 215, 10.1007/BF00705527
Grimmond, 2006, Progress in measuring and observing the urban atmosphere., Theor. Appl. Climatol., 84, 3, 10.1007/s00704-005-0140-5
Guo, 2006, Mesoscale convective precipitation system modified by urbanization in Beijing City., Atmos. Res., 82, 112, 10.1016/j.atmosres.2005.12.007
Ichinose, 1999, Impact of anthropogenic heat on urban climate in Tokyo., Atmos. Environ., 33, 3897, 10.1016/S1352-2310(99)00132-6
Janjić, 1990, The step-mountain coordinate: Physical package., Mon. Wea. Rev., 118, 1429, 10.1175/1520-0493(1990)118<1429:TSMCPP>2.0.CO;2
Janjić, 1994, The step-mountain eta coordinate model: Further developments of the convection, viscous sublayer, and turbulence closure schemes., Mon. Wea. Rev., 122, 927, 10.1175/1520-0493(1994)122<0927:TSMECM>2.0.CO;2
Kusaka, 2004, Thermal effects of urban canyon structure on the nocturnal heat island: Numerical experiment using a mesoscale model coupled with an urban canopy model., J. Appl. Meteor., 43, 1899, 10.1175/JAM2169.1
Kusaka, 2001, A simple single-layer urban canopy model for atmospheric models: Comparison with multi-layer and slab models., Bound.-Layer Meteor., 101, 329, 10.1023/A:1019207923078
Li, 2008, Observation and analysis of nocturnal low-level jet characteristics over Beijing (in Chinese)., Chinese J. Geophys., 51, 360
Liu, 2006, Verification of a mesoscale data-assimilation and forecasting system for the Oklahoma City area during the Joint Urban 2003 field project., J. Appl. Meteor. Climatol., 45, 912, 10.1175/JAM2383.1
Martilli, 2002, An urban surface exchange parameterization for mesoscale models., Bound.-Layer Meteor., 104, 261, 10.1023/A:1016099921195
Masson, 2000, A physically-based scheme for the urban energy budget in atmospheric models., Bound.-Layer Meteor., 94, 357, 10.1023/A:1002463829265
Masson, 2006, Urban surface modeling and the meso-scale impact of cities., Theor. Appl. Climatol., 84, 35, 10.1007/s00704-005-0142-3
Mestayer, 2005, The urban boundary-layer field campaign in Marseille (UBL/CLU-ESCOMPTE): Set-up and first results., Bound.-Layer Meteor., 114, 315, 10.1007/s10546-004-9241-4
Miao, 2008, Formation of horizontal convective rolls in urban areas., Atmos. Res., 89, 298, 10.1016/j.atmosres.2008.02.013
Oke, 1982, The energetic basis of the urban heat island., Quart. J. Roy. Meteor. Soc., 108, 1
Oke, 1995, The heat island of the urban boundary layer: Characteristics, causes and effects., 10.1007/978-94-017-3686-2_5
Ren, 2007, Implications of temporal change in urban heat island intensity observed at Beijing and Wuhan stations., Geophys. Res. Lett., 34, L05711, 10.1029/2006GL027927
Rotach, 2005, BUBBLE—An urban boundary layer project., Theor. Appl. Climatol., 81, 231, 10.1007/s00704-004-0117-9
Sailor, 2004, A top–down methodology for developing diurnal and seasonal anthropogenic heating profiles for urban areas., Atmos. Environ., 38, 2737, 10.1016/j.atmosenv.2004.01.034
Sakakibara, 1996, A numerical study of the effect of urban geometry upon the surface energy budget., Atmos. Environ., 30, 487, 10.1016/1352-2310(94)00150-2
Schlünzen, 2003, Relevance of sub-grid-scale land-use effects for mesoscale models., Tellus, 55A, 232, 10.1034/j.1600-0870.2003.00017.x
Shreffler, 1978, Detection of centripetal heat-island circulations from tower data in St. Louis., Bound.-Layer Meteor., 15, 229, 10.1007/BF00121924
Skamarock, 2005, A description of the Advanced Research WRF version 2.
Souch, 2006, Applied climatology: Urban climate., Prog. Phys. Geogr., 30, 270, 10.1191/0309133306pp484pr
Taha, 1999, Modifying a mesoscale meteorological model to better incorporate urban heat storage: A bulk-parameterization approach., J. Appl. Meteor., 38, 466, 10.1175/1520-0450(1999)038<0466:MAMMMT>2.0.CO;2
Wan, 2002, Validation of the land–surface temperature products retrieved from Terra moderate resolution imaging spectroradiometer data., Remote Sens. Environ., 83, 163, 10.1016/S0034-4257(02)00093-7
Weckwerth, 1999, An observational study of the evolution of horizontal convective rolls., Mon. Wea. Rev., 127, 2160, 10.1175/1520-0493(1999)127<2160:AOSOTE>2.0.CO;2
Weng, 2001, The theory and experimental verification of 915 M microwave radar (in Chinese)., Chinese J. Quant. Electron., 18, 92
Yang, 2003, Urban land-cover change detection through sub-pixel imperviousness mapping using remotely sensed data., Photogramm. Eng. Remote Sens., 69, 1003, 10.14358/PERS.69.9.1003
Zhang, 2009, Impacts of urban expansion and future green planting on summer precipitation in the Beijing metropolitan area., J. Geophys. Res., 114, D02116