A Neural Network Nonlinear Multimodel Ensemble to Improve Precipitation Forecasts over Continental US
A novel multimodel ensemble approach based on learning from data using the neural network (NN) technique is formulated and applied for improving 24-hour precipitation forecasts over the continental US. The developed nonlinear approach allowed us to account for nonlinear correlation between ensemble...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2012/649450 |
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| author | Vladimir M. Krasnopolsky Ying Lin |
| author_facet | Vladimir M. Krasnopolsky Ying Lin |
| author_sort | Vladimir M. Krasnopolsky |
| collection | DOAJ |
| description | A novel multimodel ensemble approach based on learning from data using the neural network (NN) technique is formulated and applied for improving 24-hour precipitation forecasts over the continental US. The developed nonlinear approach allowed us to account for nonlinear correlation between ensemble members and to produce “optimal” forecast represented by a nonlinear NN ensemble mean. The NN approach is compared with the conservative multi-model ensemble, with multiple linear regression ensemble approaches, and with results obtained by human forecasters. The NN multi-model ensemble improves upon conservative multi-model ensemble and multiple linear regression ensemble, it (1) significantly reduces high bias at low precipitation level, (2) significantly reduces low bias at high precipitation level, and (3) sharpens features making them closer to the observed ones. The NN multi-model ensemble performs at least as well as human forecasters supplied with the same information. The developed approach is a generic approach that can be applied to other multi-model ensemble fields as well as to single model ensembles. |
| format | Article |
| id | doaj-art-827d624303eb44a7b17c40e86f577df8 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-827d624303eb44a7b17c40e86f577df82025-02-03T05:45:31ZengWileyAdvances in Meteorology1687-93091687-93172012-01-01201210.1155/2012/649450649450A Neural Network Nonlinear Multimodel Ensemble to Improve Precipitation Forecasts over Continental USVladimir M. Krasnopolsky0Ying Lin1National Centers for Environmental Prediction, NOAA, College Park, MD 20740, USANational Centers for Environmental Prediction, NOAA, College Park, MD 20740, USAA novel multimodel ensemble approach based on learning from data using the neural network (NN) technique is formulated and applied for improving 24-hour precipitation forecasts over the continental US. The developed nonlinear approach allowed us to account for nonlinear correlation between ensemble members and to produce “optimal” forecast represented by a nonlinear NN ensemble mean. The NN approach is compared with the conservative multi-model ensemble, with multiple linear regression ensemble approaches, and with results obtained by human forecasters. The NN multi-model ensemble improves upon conservative multi-model ensemble and multiple linear regression ensemble, it (1) significantly reduces high bias at low precipitation level, (2) significantly reduces low bias at high precipitation level, and (3) sharpens features making them closer to the observed ones. The NN multi-model ensemble performs at least as well as human forecasters supplied with the same information. The developed approach is a generic approach that can be applied to other multi-model ensemble fields as well as to single model ensembles.http://dx.doi.org/10.1155/2012/649450 |
| spellingShingle | Vladimir M. Krasnopolsky Ying Lin A Neural Network Nonlinear Multimodel Ensemble to Improve Precipitation Forecasts over Continental US Advances in Meteorology |
| title | A Neural Network Nonlinear Multimodel Ensemble to Improve Precipitation Forecasts over Continental US |
| title_full | A Neural Network Nonlinear Multimodel Ensemble to Improve Precipitation Forecasts over Continental US |
| title_fullStr | A Neural Network Nonlinear Multimodel Ensemble to Improve Precipitation Forecasts over Continental US |
| title_full_unstemmed | A Neural Network Nonlinear Multimodel Ensemble to Improve Precipitation Forecasts over Continental US |
| title_short | A Neural Network Nonlinear Multimodel Ensemble to Improve Precipitation Forecasts over Continental US |
| title_sort | neural network nonlinear multimodel ensemble to improve precipitation forecasts over continental us |
| url | http://dx.doi.org/10.1155/2012/649450 |
| work_keys_str_mv | AT vladimirmkrasnopolsky aneuralnetworknonlinearmultimodelensembletoimproveprecipitationforecastsovercontinentalus AT yinglin aneuralnetworknonlinearmultimodelensembletoimproveprecipitationforecastsovercontinentalus AT vladimirmkrasnopolsky neuralnetworknonlinearmultimodelensembletoimproveprecipitationforecastsovercontinentalus AT yinglin neuralnetworknonlinearmultimodelensembletoimproveprecipitationforecastsovercontinentalus |