VERIFICATION OF STATISTICAL CLOUDINESS ESTIMATIONS FOR EUROPE
Verification of statistical cloudiness estimations for Europe. The climate forcing induced by cloud cover consists one of the main doubtful aspect of climate change predictions. In the case of cloudiness even the sign of the trends are not cohesive in a given region. In this sense further investigat...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Cluj University Press
2012-03-01
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| Series: | Aerul şi Apa: Componente ale Mediului |
| Subjects: | |
| Online Access: | http://aerapa.conference.ubbcluj.ro/2012/pdf/39%20Bartok_Imecs.pdf |
| _version_ | 1797429527453892608 |
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| author | Zoltán Imecs Blanka Bartók |
| author_facet | Zoltán Imecs Blanka Bartók |
| author_sort | Zoltán Imecs |
| collection | DOAJ |
| description | Verification of statistical cloudiness estimations for Europe. The climate forcing induced by cloud cover consists one of the main doubtful aspect of climate change predictions. In the case of cloudiness even the sign of the trends are not cohesive in a given region. In this sense further investigation regarding the behavior of cloudiness are indicated. In this study a statistical estimation of total cloudiness is elaborated using the method of instrumental variables. For this analyze surface-observed monthly mean cloudiness data was applied for the period of 1973-1996. In the second part of the study the verification of results is established using an independent satellite retrieved data series for the period of 2005-2011. Based on verification can be conclude that the applied statistical estimation is able to reproduce the measured values with an RMSE 7, 3%, the difference between the measured and predicted changes of cloudiness is 1.44%, found a stronger decrease of cloudiness in real data as the estimation had indicate. The main differences between the observed and predicted value is evident in the distribution of the frequencies showing a shifting towards the lower values in observed data but not recognized in the estimated values. In the geographical distribution of estimations errors sign a difference is detected between the water surfaces and continental regions. |
| first_indexed | 2024-03-09T09:14:26Z |
| format | Article |
| id | doaj.art-fe8ca47772a8402797e684c931bc3876 |
| institution | Directory Open Access Journal |
| issn | 2067-743X |
| language | English |
| last_indexed | 2024-03-09T09:14:26Z |
| publishDate | 2012-03-01 |
| publisher | Cluj University Press |
| record_format | Article |
| series | Aerul şi Apa: Componente ale Mediului |
| spelling | doaj.art-fe8ca47772a8402797e684c931bc38762023-12-02T07:50:31ZengCluj University PressAerul şi Apa: Componente ale Mediului2067-743X2012-03-012012289296VERIFICATION OF STATISTICAL CLOUDINESS ESTIMATIONS FOR EUROPEZoltán ImecsBlanka BartókVerification of statistical cloudiness estimations for Europe. The climate forcing induced by cloud cover consists one of the main doubtful aspect of climate change predictions. In the case of cloudiness even the sign of the trends are not cohesive in a given region. In this sense further investigation regarding the behavior of cloudiness are indicated. In this study a statistical estimation of total cloudiness is elaborated using the method of instrumental variables. For this analyze surface-observed monthly mean cloudiness data was applied for the period of 1973-1996. In the second part of the study the verification of results is established using an independent satellite retrieved data series for the period of 2005-2011. Based on verification can be conclude that the applied statistical estimation is able to reproduce the measured values with an RMSE 7, 3%, the difference between the measured and predicted changes of cloudiness is 1.44%, found a stronger decrease of cloudiness in real data as the estimation had indicate. The main differences between the observed and predicted value is evident in the distribution of the frequencies showing a shifting towards the lower values in observed data but not recognized in the estimated values. In the geographical distribution of estimations errors sign a difference is detected between the water surfaces and continental regions.http://aerapa.conference.ubbcluj.ro/2012/pdf/39%20Bartok_Imecs.pdfcloudinessstatistical estimationverificationclimate change |
| spellingShingle | Zoltán Imecs Blanka Bartók VERIFICATION OF STATISTICAL CLOUDINESS ESTIMATIONS FOR EUROPE Aerul şi Apa: Componente ale Mediului cloudiness statistical estimation verification climate change |
| title | VERIFICATION OF STATISTICAL CLOUDINESS ESTIMATIONS FOR EUROPE |
| title_full | VERIFICATION OF STATISTICAL CLOUDINESS ESTIMATIONS FOR EUROPE |
| title_fullStr | VERIFICATION OF STATISTICAL CLOUDINESS ESTIMATIONS FOR EUROPE |
| title_full_unstemmed | VERIFICATION OF STATISTICAL CLOUDINESS ESTIMATIONS FOR EUROPE |
| title_short | VERIFICATION OF STATISTICAL CLOUDINESS ESTIMATIONS FOR EUROPE |
| title_sort | verification of statistical cloudiness estimations for europe |
| topic | cloudiness statistical estimation verification climate change |
| url | http://aerapa.conference.ubbcluj.ro/2012/pdf/39%20Bartok_Imecs.pdf |
| work_keys_str_mv | AT zoltanimecs verificationofstatisticalcloudinessestimationsforeurope AT blankabartok verificationofstatisticalcloudinessestimationsforeurope |