Papers by Joan M . Castro-Sánchez
WIT Transactions on Ecology and the Environment, Apr 6, 2004
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WSEAS TRANSACTIONS on SYSTEMS archive, Jun 1, 2009
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International Journal of Hydrology Science and Technology, 2015
The introduced algorithm uses high spatial and temporal resolution radar data to predict the evol... more The introduced algorithm uses high spatial and temporal resolution radar data to predict the evolving rainfall rate distribution. The most likely future rainfall areas are estimated by tracking rain cell centroid advection in consecutive radar images. A nonlinear regression model varying in the time and space domain is proposed to predict the intensity of rainfall rate. It is assumed that the current radar reflectivity is a function of the previous reflectivity observed in surrounding areas with its centre on the location of a predicted pixel. It is also assumed that the ratio of reflectivity of a given pixel to the reflectivity of the convective core is a relevant predictor for rainfall estimation. The algorithm was validated against five rainfall events. The hit rate, false alarm ratio, and the Heike Skill Score were: 0.64, 0.27, and 0.61, respectively. The root mean squared error exhibits an average of 0.03 mm/hr.
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International Journal of Water, 2015
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WSEAS TRANSACTIONS on SYSTEMS archive, Oct 1, 2008
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Journal of Applied Meteorology and Climatology, 2017
Hourly data collected from ground stations were used to study the maximum daytime heat index Hi i... more Hourly data collected from ground stations were used to study the maximum daytime heat index Hi in the Mesoamerica and Caribbean Sea (MAC) region for a 35-yr period (1980–2014). Observations of Hi revealed larger values during the rainy season and smaller values during the dry season. The Hi climatology exhibits the largest values in Mesoamerica, followed by the Greater Antilles and then by the Lesser Antilles. The trend in Hi indicates a notable increasing pattern of 0.05°C yr−1 (0.10°F yr−1), and the trends are more prominent in Mesoamerica than in Caribbean countries. This work also includes the analysis of heat index extreme events (HIEE). Usually the extreme values of the heat index are used for advising heat warning events, and it was found that 45 HIEEs occurred during the studied period. The average duration of HIEE was 2.4 days, and the average relative intensity (excess over the threshold) was 2.4°C (4.3°F). It was found that 82% of HIEE lasted 2 or 2.5 days and 80% exhibi...
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International Journal of Water, 2015
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International Journal of Hydrology Science and Technology, 2015
The introduced algorithm uses high spatial and temporal resolution radar data to predict the evol... more The introduced algorithm uses high spatial and temporal resolution radar data to predict the evolving rainfall rate distribution. The most likely future rainfall areas are estimated by tracking rain cell centroid advection in consecutive radar images. A nonlinear regression model varying in the time and space domain is proposed to predict the intensity of rainfall rate. It is assumed that the current radar reflectivity is a function of the previous reflectivity observed in surrounding areas with its centre on the location of a predicted pixel. It is also assumed that the ratio of reflectivity of a given pixel to the reflectivity of the convective core is a relevant predictor for rainfall estimation. The algorithm was validated against five rainfall events. The hit rate, false alarm ratio, and the Heike Skill Score were: 0.64, 0.27, and 0.61, respectively. The root mean squared error exhibits an average of 0.03 mm/hr.
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A short term rainfall prediction algorithm for intense storms is introduced in this work. The alg... more A short term rainfall prediction algorithm for intense storms is introduced in this work. The algorithm uses high spatial and temporal resolution radar data to predict the evolving distribution of rainfall rate. It is assumed that for a short time period, a rain cloud behaves as a rigid object, with all parts moving in the same direction at a constant speed. Thus, the most likely future rainfall areas are estimated by tracking rain cell centroid advection in consecutive radar images. To achieve this estimation, a nonlinear regression model varying in the time and space domain is proposed to predict the most likely rainfall patterns. This model is based on the assumption that the current radar reflectivity is a function of the previous reflectivity observed in surrounding areas centered on the location of a predicted pixel. A second assumption is that the ratio of reflectivity of a given pixel to reflectivity of convective core is a fundamental predictor for rainfall estimation. This...
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Climate Change - Geophysical Foundations and Ecological Effects, 2011
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IAES International Journal of Artificial Intelligence (IJ-AI), 2012
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JAWRA Journal of the American Water Resources Association, 2008
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WSEAS Transaction on …, 2009
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Proceedings of the 8th …, 2009
A projection algorithm to detect rain cloud pixels in visible and infrared satellite data is intr... more A projection algorithm to detect rain cloud pixels in visible and infrared satellite data is introduced in this work. The algorithm is based on the angle formed by two vectors in the n-dimensional space. Rain/no rain pixels are identified by using radar rain rate over the ...
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2007 IEEE International Geoscience and Remote Sensing Symposium, 2007
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Proceedings of the 12th Wseas International Conference on Systems, Jul 22, 2008
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JAWRA Journal of the American Water Resources Association, 2008
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Papers by Joan M . Castro-Sánchez