| 1. |
- Jansson, Christer, et al.
(författare)
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Heat balance of an asphalt surface : observations and physically-based simulations
- 2006
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Ingår i: Meteorological Applications. - : Wiley. - 1350-4827 .- 1469-8080. ; 13:2, s. 203-212
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Tidskriftsartikel (refereegranskat)abstract
- A physically-based 1-D beat and mass transfer model was tested to estimate the beat fluxes of an asphalt surface. The model was run for two summer months for a road test site in southwest Sweden. Parameters for thermal properties, surface runoff, radiation and turbulent transfer were obtained from a description of the road stratification and from the literature. Coefficients of determination (r(2)) 0.94, 0.93 and 0.97 were obtained when simulated results were compared with observations of net radiation, beat flow below the surface and surface temperature respectively, all with slope coefficients close to unity. In addition, simulation results elucidated the robe of water vapour transport through the asphalt-soil profile and its effect on the latent beat flow from the surface. Problems were identified with closure of the beat balance in measurements based on discrepancy between simulated and observed sensible heat flux.
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| 2. |
- Pramualsakdikul, Surat, 1961, et al.
(författare)
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Sensing of diurnal and semi-diurnal variability in the water vapour content in the tropics using GPS measurements
- 2007
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Ingår i: Meteorological Applications. - : Wiley. - 1350-4827 .- 1469-8080. ; 14:4, s. 403-412
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Tidskriftsartikel (refereegranskat)abstract
- The diurnal and semi-diurnal variability of the integrated precipitable water vapour (IPWV) was studied by using Global Positioning System (GPS) data (1998-2004) from 14 International GNSS Service (IGS) stations located between latitudes 20°S and 20°N, and longitudes 70°-170°E. The phases and amplitudes of the EPWV are compared to the corresponding estimates from two numerical weather models (NWMs). Results reveal that there are diurnal amplitudes of more than 0.4 mm for most sites, except sites on small islands in the ocean. The maximum diurnal amplitude is 3 mm at Bakosurtanal, Indonesia. The estimated semi-diurnal signals are in general small. The maximum of the IPWV typically occurs between 1200 and 2400 local solar time. The results suggest that GPS data are useful for high-temporal-resolution studies of IPWV. The accuracy of the estimated diurnal amplitudes is limited by the use of a simple model for the mean temperature of the wet refractivity, and the accuracy of the estimated semi-diurnal amplitudes is likely to be improved by a higher temporal resolution of the ground pressure data at the GPS sites. Copyright © 2007 Royal Meteorological Society.
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| 3. |
- Smith, Paul J, et al.
(författare)
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Towards the provision of site specific flood warnings using wireless sensor networks
- 2009
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Ingår i: Meteorological Applications. - : Wiley. - 1350-4827 .- 1469-8080. ; 16, s. 57-64
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Tidskriftsartikel (refereegranskat)abstract
- An important aspect of flood risk management is the issuing of timely flood alerts. The spatial, as well as temporal, scale of these warnings is important. In many situations efficient risk management may be aided by the provision of local flood predictions at a high spatial resolution. Examples of such situations include issuing warnings for small groups of outlying houses or key infrastructure locations Such as power sub-stations. In this paper a methodology for providing automated, detailed and location specific warnings which are computed ‘on-site’ is presented. Copyright (C) 2009 Royal Meteorological Society
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| 4. |
- Younger, P. M., et al.
(författare)
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The usability of 250 m resolution data from the UK Meteorological Office Unified Model as input data for a hydrological model
- 2008
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Ingår i: Meteorological Applications. - : Wiley. - 1350-4827 .- 1469-8080. ; 15:2, s. 207-217
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Tidskriftsartikel (refereegranskat)abstract
- This article examines whether very-high resolution (250 m) data provided by the United Kingdom Meteorological Office Unified Model (UM) could be used as an input to a hydrological model for hydrological forecasting purposes. A summer convective event and a winter stratiform event are both considered and it is found that in these two cases, despite errors in both the positioning and timing of storms the predictions were of a sufficient quality to provide beneficial inputs for hydrological modelling. There are encouraging indications that this technique may be valuable in improving flood forecasting generally. Copyright (C) 2008 Royal Meteorological Society.
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