68 results found
Banks JR, Brindley HE, 2013, Evaluation of MSG-SEVIRI mineral dust retrieval products over North Africa and the Middle East, REMOTE SENSING OF ENVIRONMENT, Vol: 128, Pages: 58-73, ISSN: 0034-4257
Carboni E, Thomas G, Sayer A, et al., 2012, Intercomparison of desert dust optical depth from satellite measurements, Atmospheric Measurement Techniques, Vol: 5, Pages: 1973-2002
This work provides a comparison of satellite retrievals of Saharan desert dust aerosol optical depth (AOD) during a strong dust event through March 2006. In this event, a large dust plume was transported over desert, vegetated, and ocean surfaces. The aim is to identify the differences between current datasets. The satellite instruments considered are AATSR, AIRS, MERIS, MISR, MODIS, OMI, POLDER, and SEVIRI. An interesting aspect is that the different algorithms make use of different instrument characteristics to obtain retrievals over bright surfaces. These include multi-angle approaches (MISR, AATSR), polarisation measurements (POLDER), single-view approaches using solar wavelengths (OMI, MODIS), and the thermal infrared spectral region (SEVIRI, AIRS). Differences between instruments, together with the comparison of different retrieval algorithms applied to measurements from the same instrument, provide a unique insight into the performance and characteristics of the various techniques employed. As well as the intercomparison between different satellite products, the AODs have also been compared to co-located AERONET data. Despite the fact that the agreement between satellite and AERONET AODs is reasonably good for all of the datasets, there are significant differences between them when compared to each other, especially over land. These differences are partially due to differences in the algorithms, such as assumptions about aerosol model and surface properties. However, in this comparison of spatially and temporally averaged data, it is important to note that differences in sampling, related to the actual footprint of each instrument on the heterogeneous aerosol field, cloud identification and the quality control flags of each dataset can be an important issue.
Chan N, Young T, Brindley H, et al., 2012, Validation of energy prediction method for a concentrator photovoltaic module in Toyohashi Japan, Progress in Photovoltaics, Pages: n/a-n/a
III–V concentrator photovoltaic systems attain high efficiency through the use of series connected multi-junction solar cells. As these solar cells absorb over distinct bands over the solar spectrum, they have a more complex response to real illumination conditions than conventional silicon solar cells. Estimates for annual energy yield made assuming fixed reference spectra can vary by up to 15% depending on the assumptions made. Using a detailed computer simulation, the behaviour of a 20-cell InGaP/In0.01GaAs/Ge multi-junction concentrator system was simulated in 5-min intervals over an entire year, accounting for changes in direct normal irradiance, humidity, temperature and aerosol optical depth. The simulation was compared with concentrator system monitoring data taken over the same period and excellent agreement (within 2%) in the annual energy yield was obtained. Air mass, aerosol optical depth and precipitable water have been identified as atmospheric parameters with the largest impact on system efficiency.
Brindley H, Knippertz P, Ryder C, et al., 2012, A critical evaluation of the ability of the Spinning Enhanced Visible and Infrared Imager (SEVIRI) thermal infrared red-green-blue rendering to identify dust events: Theoretical analysis, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, Vol: 117, ISSN: 2169-897X
Chan NLA, Brindley HE, Ekins-Daukes NJ, 2012, Quantifying the Impact of Individual Atmospheric Parameters on CPV System Power and Energy Yield, 38th IEEE Photovoltaic Specialists Conference (PVSC), Publisher: IEEE, Pages: 922-927
Rosario NE, Yamasoe MA, Brindley H, et al., 2011, Downwelling solar irradiance in the biomass burning region of the southern Amazon: Dependence on aerosol intensive optical properties and role of water vapor, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, Vol: 116, ISSN: 2169-897X
Haywood JM, Johnson BT, Osborne SR, et al., 2011, Observations and modelling of the solar and terrestrial radiative effects of Saharan dust: a radiative closure case-study over oceans during the GERBILS campaign, QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, Vol: 137, Pages: 1211-1226, ISSN: 0035-9009
Christopher SA, Gupta P, Johnson B, et al., 2011, Multi-sensor satellite remote sensing of dust aerosols over North Africa during GERBILS, QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, Vol: 137, Pages: 1168-1178, ISSN: 0035-9009
Haywood JM, Johnson BT, Osborne SR, et al., 2011, Motivation, rationale and key results from the GERBILS Saharan dust measurement campaign, QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, Vol: 137, Pages: 1106-1116, ISSN: 0035-9009
Chan N, Young T, Brindley H, et al., 2010, VARIATION IN SPECTRAL IRRADIANCE AND THE CONSEQUENCES FOR MULTI-JUNCTION CONCENTRATOR PHOTOVOLTAIC SYSTEMS, 35th IEEE Photovoltaic Specialists Conference, Publisher: IEEE, Pages: 3008-3012, ISSN: 0160-8371
Brindley HE, Russell JE, 2009, An assessment of Saharan dust loading and the corresponding cloud-free longwave direct radiative effect from geostationary satellite observations, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, Vol: 114, ISSN: 2169-897X
Clerbaux N, Russell JE, Dewitte S, et al., 2009, Comparison of GERB instantaneous radiance and flux products with CERES Edition-2 data, REMOTE SENSING OF ENVIRONMENT, Vol: 113, Pages: 102-114, ISSN: 0034-4257
Bantges RJ, Russell JE, Harries JE, et al., 2009, A Geostationary Earth Radiation Budget Dataset For Climate Research: First Intercomparison Results Between Data From the GERB-1 &-2 Instruments, International Radiation Symposium (IRC/IAMAS), Publisher: AMER INST PHYSICS, Pages: 513-516, ISSN: 0094-243X
Brindley HE, Russell JE, 2009, The Direct Cloud-free Longwave Radiative Effect of Saharan Dust as observed by the Geostationary Earth Radiation Budget (GERB) Experiment, International Radiation Symposium (IRC/IAMAS), Publisher: AMER INST PHYSICS, Pages: 521-524, ISSN: 0094-243X
Clerbaux N, Dewitte S, Bertrand C, et al., 2008, Unfiltering of the Geostationary Earth Radiation Budget (GERB) data. Part I: Shortwave radiation, Journal of Atmospheric and Oceanic Technology, Vol: 25, Pages: 1087-1105
Brindley HE, Russell JE, 2008, Assessing the errors in shortwave radiative fluxes inferred from the Geostationary Earth Radiation Budget (GERB) instrument in the presence of dust aerosol, JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY, Vol: 47, Pages: 1659-1680, ISSN: 1558-8424
Brindley HE, Russell JE, 2008, Assessing the errors in shortwave radiative fluxes inferred from the Geostationary Earth Radiation Budget (GERB) instrument in the presence of dust aerosol, GASTRIC CANCER, Vol: 47, Pages: 1659-1680
The Geostationary Earth Radiation Budget (GERB) instruments flying on the Meteosat Second Generation series of satellites provide a unique tool with which to monitor the diurnal evolution of top-of-atmosphere broadband radiation fields. GERB products, which have recently been released to the scientific community, include aerosol information in addition to the observed radiances and inferred fluxes. However, no account of the anisotropic characteristics of aerosol has been incorporated in the radiance-to-flux conversion, which uses angular distribution models developed for clear or cloudy conditions. Here an attempt is made to quantify the impact of this omission in the shortwave (SW), focusing on dust-contaminated scenes. An observationally based representation of dust is used to develop a theoretical angular distribution model, which is tested through comparison with observed GERB radiances. For dusty scenes that have been processed as clear ocean, applying the dust model to convert GERB radiances to fluxes reduces the SW reflected flux by an average of approximately 12 W m(-2) relative to the original GERB fluxes. This value ranges from -4 to +55 W m(-2), depending on observation geometry and dust loading. For dusty scenes that the GERB processing has treated as cloudy, GERB fluxes are generally smaller than values obtained using the dust-specific model. On average, over the time period studied here, the two effects partially cancel, and the overall mean difference is 2.5 W m(-2). However, it is shown that this cancellation is highly sensitive to the location and time period under consideration.
Brindley HE, 2007, Estimating the top-of-atmosphere longwave radiative forcing due to Saharan dust from satellite observations over a west African surface site, Atmospheric Science Letters, Vol: 8, Pages: 74-79
This paper presents a methodology for estimating the longwave top-of-atmosphere direct radiative forcing due to Saharan dust aerosol from satellite observations made by the Spinning Enhanced Visible and InfraRed Imager (SEVIRI) and Geostationary Earth Radiation Budget (GERB) instruments. Narrow-band observations from SEVIRI are used to detect dust presence and quantify its loading, while GERB provides an estimate of the dust impact on the total outgoing longwave radiation. Applying the technique to observations made over the Banizoumbou surface station in Niger through March-June 2006 indicates a midday longwave forcing efficiency of 17 ± 5 W m-2 per unit aerosol optical depth.
Brindley HE, 2007, Estimating the top-of-atmosphere longwave radiative forcing due to Saharan dust from satellite observations over a west African surface site, ATMOSPHERIC SCIENCE LETTERS, Vol: 8, Pages: 74-79, ISSN: 1530-261X
Brindley HE, Russell JE, 2006, Improving GERB scene identification using SEVIRI: Infrared dust detection strategy, REMOTE SENSING OF ENVIRONMENT, Vol: 104, Pages: 426-446, ISSN: 0034-4257
Brindley HE, Ignatov A, 2006, Retrieval of mineral aerosol optical depth and size information from Meteosat Second Generation SEVIRI solar reflectance bands, REMOTE SENSING OF ENVIRONMENT, Vol: 102, Pages: 344-363, ISSN: 0034-4257
Kratz DP, Mlynczak MG, Mertens CJ, et al., 2005, An inter-comparison of far-infrared line-by-line radiative transfer models, JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, Vol: 90, Pages: 323-341, ISSN: 0022-4073
Sandford MCW, Allan PM, Caldwell ME, et al., 2003, The geostationary Earth radiation budget (GERB) instrument on EUMETSAT's MSG satellite, 51st International Astronautical Congress, Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: 909-915, ISSN: 0094-5765
Brindley HE, Harries JE, 2003, Observations of the infrared outgoing spectrum of the Earth from space: The effects of temporal and spatial sampling, JOURNAL OF CLIMATE, Vol: 16, Pages: 3820-3833, ISSN: 0894-8755
Brindley HE, Allan RP, 2003, Simulations of the effects of interannual and decadal variability on the clear-sky outgoing long-wave radiation spectrum, QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, Vol: 129, Pages: 2971-2988, ISSN: 0035-9009
Brindley HE, Harries JE, 2003, The impact of instrument field of view on measurements of cloudy-sky spectral radiances from space: application to IRIS and IMG, JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, Vol: 78, Pages: 341-352, ISSN: 0022-4073
Harries JE, Brindley HE, Sagoo PJ, et al., 2001, Increase in greenhouse forcing inferred from the outgoing longwave radiation spectra of the Earth in 1970 and 1997 (vol 410, pg 355, 2001), NATURE, Vol: 410, Pages: 1124-1124, ISSN: 0028-0836
Harries JE, Brindley HE, Sagoo PJ, et al., 2001, Increases in greenhouse forcing inferred from the outgoing longwave radiation spectra of the Earth in 1970 and 1997, NATURE, Vol: 410, Pages: 355-357, ISSN: 0028-0836
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