Satellite measurements of solar radiation in the Yaqui Valley, northern Mexico
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Nacional Autónoma de México
2001
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| _version_ | 1876429700643946496 |
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| author | W. James Shuttleworth |
| author_facet | W. James Shuttleworth |
| contents | Satellite measurements of solar radiation in the Yaqui Valley, northern Mexico W. James Shuttleworth Rachel T. Pinker Jaime Garatuza Payán Ciencias de la Tierra GOES evaporation remote sensing Solar radiation Makkink equation Half-hourly estimates of solar radiation were obtained from satellite data for the Yaqui Valley in Sonora, Mexico for theperiod November 1998 to March 1999. Estimates were made on a 50 km grid using the Global Energy and Water-Cycle ExperimentSurface Radiation Budget (GEWEX/SRB) algorithm applied with GOES-East data and, on a 4 km grid, using a highresolutiondevelopment of the GEWEX/SRB algorithm with GOES-West data. The resulting values were compared with fieldmeasurements made at two field sites. On average, using the presently specified calibration of the radiometers on the two satellites,the values derived from GOES-East data are 18% greater than field measurements, while those from GOES-West are 9%lower. If these systematic differences reflect the current poor calibration of the satellite sensors, the estimates obtained from eachsatellite may be corrected to agree with the surface data. After re-calibration, significant random differences between the hourlysatellite estimates and surface observations remain because the satellite provides an instantaneous area-average estimate, whilethe field observation is a time-average single-point measurement. These discrepancies are reduced when daily-average values ofsolar radiation are compared. The error between the satellite and ground measurements is lower for the high-resolution estimatesthan it is for the low-resolution estimates, and there is an enhancement of spatial detail with the high-resolution data, making thelatter preferable for hydrological applications. Previous research demonstrated the capacity for estimating potential evaporation inthe area from daily-average solar radiation using a locally calibrated version of the Makkink equation. Locally relevant cropfactors also have been derived for wheat and cotton. 2001 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56840305 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.40 |
| format | Artículo científico |
| id | redalyc_56840305 |
| institution | Redalyc |
| language | en |
| publishDate | 2001 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Satellite measurements of solar radiation in the Yaqui Valley, northern Mexico W. James Shuttleworth Ciencias de la Tierra GOES evaporation remote sensing Solar radiation Makkink equation Satellite measurements of solar radiation in the Yaqui Valley, northern Mexico W. James Shuttleworth Rachel T. Pinker Jaime Garatuza Payán Ciencias de la Tierra GOES evaporation remote sensing Solar radiation Makkink equation Half-hourly estimates of solar radiation were obtained from satellite data for the Yaqui Valley in Sonora, Mexico for theperiod November 1998 to March 1999. Estimates were made on a 50 km grid using the Global Energy and Water-Cycle ExperimentSurface Radiation Budget (GEWEX/SRB) algorithm applied with GOES-East data and, on a 4 km grid, using a highresolutiondevelopment of the GEWEX/SRB algorithm with GOES-West data. The resulting values were compared with fieldmeasurements made at two field sites. On average, using the presently specified calibration of the radiometers on the two satellites,the values derived from GOES-East data are 18% greater than field measurements, while those from GOES-West are 9%lower. If these systematic differences reflect the current poor calibration of the satellite sensors, the estimates obtained from eachsatellite may be corrected to agree with the surface data. After re-calibration, significant random differences between the hourlysatellite estimates and surface observations remain because the satellite provides an instantaneous area-average estimate, whilethe field observation is a time-average single-point measurement. These discrepancies are reduced when daily-average values ofsolar radiation are compared. The error between the satellite and ground measurements is lower for the high-resolution estimatesthan it is for the low-resolution estimates, and there is an enhancement of spatial detail with the high-resolution data, making thelatter preferable for hydrological applications. Previous research demonstrated the capacity for estimating potential evaporation inthe area from daily-average solar radiation using a locally calibrated version of the Makkink equation. Locally relevant cropfactors also have been derived for wheat and cotton. 2001 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56840305 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.40 |
| title | Satellite measurements of solar radiation in the Yaqui Valley, northern Mexico |
| topic | Ciencias de la Tierra GOES evaporation remote sensing Solar radiation Makkink equation |
| url | https://www.redalyc.org/articulo.oa?id=56840305 |