A High-Resolution Model of the Planetary Boundary Layer—Sensitivity Tests and Comparisons with SESAME-79 Data

Zhang, Dalin; Anthes, Richard A.

doi:10.1175/1520-0450(1982)021<1594:ahrmot>2.0.co;2

Cited by 899 publications

(369 citation statements)

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“…For MM5, the Reisner-Thompson microphysics scheme was replaced with either the simpler Reisner1 scheme (single-moment cloud ice without graupel), the Goddard scheme (includes graupel but singlemoment cloud ice; Lin et al, 1983;Tao and Simpson, 1993) or an older version of the Reisner-Thompson scheme (runs 2-4 in Figure 9). Moreover, the impact of replacing the Blackadar PBL scheme (Zhang and Anthes, 1982) by the ETA scheme (Janjic, 1994) of the MRF scheme (Hong and Pan, 1996) was tested (runs 5 and 6). For WRF, the Reisner-Thompson scheme was replaced by the WSM6 scheme (Lin et al, 1983;Hong et al, 2004), which has some similarity with the MM5 Goddard scheme (runs 7 and 8).…”

Section: Model Intercomparisonmentioning

confidence: 99%

Quantitative precipitation forecasting in the Alps: The advances achieved by the Mesoscale Alpine Programme

Richard

Buzzi

Zängl³

2007

Quart J Royal Meteoro Soc

103

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ABSTRACT:The improvement of Quantitative Precipitation Forecasting (QPF) in mountainous regions was a major supporting objective of the Mesoscale Alpine Programme (MAP) project P1 devoted to the study of orographic precipitation. This paper reviews the main MAP-related achievements regarding QPF improvement and highlights the MAP impact on developing QPF research and planning future operational strategies. Recent results based on MAP case-studies, on data analysis and assimilation, on quantification of model uncertainties, and on model intercomparison and verification substantiate the progress made in recent years in improving model performance in relation to short-range, high-resolution forecasting in complex topography regions, well represented by the European Alps.

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Section: Model Intercomparisonmentioning

confidence: 99%

Quantitative precipitation forecasting in the Alps: The advances achieved by the Mesoscale Alpine Programme

Richard

Buzzi

Zängl³

2007

Quart J Royal Meteoro Soc

103

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“…Radiation is considered from Anthes et al (1987) for absorption and scattering of short-wave radiation by clouds. Turbulent vertical exchange in the planetary boundary layer are modelled as proposed by Zhang and Anthes (1982). Soil-vegetation atmosphere exchanges are parametrized using the land-surface scheme SECHIBA (Ducoudré et al, 1993).…”

Section: Data and Criteriamentioning

confidence: 99%

Iberian thermal lows in a changed climate

Hoinka¹,

Gaertner²,

Castro³

2007

Quart J Royal Meteoro Soc

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ABSTRACT:Recent results from enhanced greenhouse-gas scenarios over southern Europe suggest that climate change implies a summertime mean surface warming of up to 4 K over the Iberian Peninsula. It is suggested that thermal lows, the most prominent Iberian summer weather, will undergo significant modifications in a changed climate. This is studied in the present paper by determining statistical features of the Iberian thermal low, at first for today's climate using data provided by ERA-40 and by the regional climate model PROMES. In general the analysed and simulated climatic structures compare well. However, the ERA-40 data provide conditions more favourable for thermal lows than simulated with the model. Statistics in a changed climate are obtained by performing two 30-year model simulations for 1961-1990 and 2071-2100. It is found that thermal lows strengthen by decreasing the central Iberian surface pressure from 1012.2 to 1010.5 hPa and increasing its daily variation by about 7% in magnitude. Associated with this is an increase in the number of thermal low days by more than 60%. A second finding is an enhancement of the sea breezes over the Iberian westerly and easterly coasts and a particularly significant strengthening of the sea breeze between Cadiz and Huelva. The westerly flow over the Strait of Gibraltar, observed during thermal low events, decreases. The increase in occurrence of the thermal low is associated with a significant increase in the number of dry spells of longer period, and could involve considerable impact on desertification, water resources and wildfire hazards around the Mediterranean basin. The results suggest that there is some evidence that the subtropical character of the Mediterranean climate strengthens.

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“…Considerable progress has been made during the last decades with the aim either to develop new or to improve existing PBL schemes (Mellor and Yamada, 1974;Blackadar, 1979;Zhang and Anthes, 1982;Janjic, 1994;Hong and Pan, 1996;Shafran et al, 2000, Gilliam andPleim, 2010). SL is the lowest part of the atmosphere, typically about a tenth of the height of the PBL where surface fluxes of scalars and momentum, nearly constant with height in this layer, dominate dynamics and physics.…”

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confidence: 99%

A sensitivity study of the WRF model in wind simulation for an area of high wind energy

Carvalho

Rocha

Gómez‐Gesteira

et al. 2012

Environmental Modelling & Software

263

143

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The performance of the Weather Research and Forecast (WRF) model in wind simulation was evaluated under different numerical a nd physical options for an area of Portugal, located in complex terrain and characterized by its significant wind energy resource. The grid nudging and integration time of the simulations were the tested numerical options. Since the goal is to simulate the near-surface wind, the physical parameterization schemes regarding the boundary layer were the ones under evaluation. Also, the influences of the local terrain complexity and simulation domain resolution on the model results were also studied. Data from three wind measuring stations located within the chosen area were compared with the model results, in terms of Root Mean Square Error, Standard Deviation Error and Bias. Wind speed histograms, occurrences and energy wind roses were also used for model evaluation. Globally, the model accurately reproduced the local wind regime, despite a significant underestimation of the wind speed. The wind direction is reasonably simulated by the model especially in wind regimes where there is a clear dominant sector, but in the presence of low wind speeds the characterization of the wind direction (observed and simulated) is very subjective and led to higher deviations between simulations and observations. Within the tested options, results show that the use of grid nudging in simulations that should not exceed an integration tim e of 2 days is the best numerical configuration, and the parameterization set composed by the physical schemes MM5eYonsei UniversityeNoah are the most suitable for this site. Results were poorer in sites with higher terrain complexity, mainly due to limita-tions of the terrain data supplied to the model. The increase of the simulation domain resolution alone is not enough to significantly improve the model performance. Results suggest that error minimization in the wind simulation can be achieved by testing and choosing a suitable numerical and physical con figuration for the region of interest together with the use of high resolution terrain data, if available.

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A High-Resolution Model of the Planetary Boundary Layer—Sensitivity Tests and Comparisons with SESAME-79 Data

Cited by 899 publications

References 0 publications

Quantitative precipitation forecasting in the Alps: The advances achieved by the Mesoscale Alpine Programme

Quantitative precipitation forecasting in the Alps: The advances achieved by the Mesoscale Alpine Programme

Iberian thermal lows in a changed climate

A sensitivity study of the WRF model in wind simulation for an area of high wind energy

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