Observed Trends and Variability in Climate Indices Relevant for Crop Yields in Southeast Asia
Climate indices are analyzed using a newly developed dataset with station-based daily data for Southeast Asia. With rice the staple food of the diet in the region, the indices used are aimed at agriculture, specifically rice production, and include the onset of the wet season and the nighttime tempe...
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| Veröffentlicht in: | Journal of climate 2016-04, Vol.29 (7), p.2651-2669 |
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| container_title | Journal of climate |
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| creator | Marjuki van der Schrier, Gerard Tank, Albert M. G. Klein van den Besselaar, Else J. M. Nurhayati Swarinoto, Y. S. |
| description | Climate indices are analyzed using a newly developed dataset with station-based daily data for Southeast Asia. With rice the staple food of the diet in the region, the indices used are aimed at agriculture, specifically rice production, and include the onset of the wet season and the nighttime temperature. Three indices are used to estimate the onset of the wet season. Despite a quantitative lack of similarity between these indices (although they are strongly correlated), the progression of the wet season over the area matches existing descriptions. Trends in the onset date of the wet season calculated over 1971–2012 are only statistically significant for a few stations; there are no signs that a wide spread delay as anticipated by future climate scenarios is already taking place. A positive trend in the nighttime temperature over the region is observed with values up to 0.7°C decade−1. For a selection of stations the change in distribution of nighttime temperatures is analyzed when comparing the 1971–90 period with the 1991–2010 period. They show a shift of the median to higher temperatures, and the decline in the number of relatively cool nights is stronger than the increase in the number of relatively warm nights. |
| doi_str_mv | 10.1175/jcli-d-14-00574.1 |
| format | Article |
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Trends in the onset date of the wet season calculated over 1971–2012 are only statistically significant for a few stations; there are no signs that a wide spread delay as anticipated by future climate scenarios is already taking place. A positive trend in the nighttime temperature over the region is observed with values up to 0.7°C decade−1. For a selection of stations the change in distribution of nighttime temperatures is analyzed when comparing the 1971–90 period with the 1991–2010 period. 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Trends in the onset date of the wet season calculated over 1971–2012 are only statistically significant for a few stations; there are no signs that a wide spread delay as anticipated by future climate scenarios is already taking place. A positive trend in the nighttime temperature over the region is observed with values up to 0.7°C decade−1. For a selection of stations the change in distribution of nighttime temperatures is analyzed when comparing the 1971–90 period with the 1991–2010 period. 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| source | American Meteorological Society; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; JSTOR Archive Collection A-Z Listing |
| subjects | Agricultural production Agriculture Climate Climate change Climate variability Climatic indexes Cooperation Crop production Crop yield Datasets Digitization Future climates High temperature Hydrology Night Night-time Nighttime Precipitation Rainy season Rice Seasons Statistical analysis Temperature Time series Trends Wet season |
| title | Observed Trends and Variability in Climate Indices Relevant for Crop Yields in Southeast Asia |
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