The impact of El Niño Southern Oscillation on cropping season rainfall variability across Central Brazil
Local‐level understanding of within‐season rainfall variability and its relationship with the El Niño Southern Oscillation (ENSO) can shed light on crop yield variations and establish appropriate cropping calendars in rainfed systems. This requires information on the growing season, including its le...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Wiley
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/108999 |
| _version_ | 1855520967560790016 |
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| author | Heinemann, Alexandre B. Ramírez Villegas, Julián Armando Stone, Luís Fernando Garcia Abreu Silva, Ana Paula Henriques da Matta, David Piscoya Diaz, Mario Ernesto |
| author_browse | Garcia Abreu Silva, Ana Paula Heinemann, Alexandre B. Henriques da Matta, David Piscoya Diaz, Mario Ernesto Ramírez Villegas, Julián Armando Stone, Luís Fernando |
| author_facet | Heinemann, Alexandre B. Ramírez Villegas, Julián Armando Stone, Luís Fernando Garcia Abreu Silva, Ana Paula Henriques da Matta, David Piscoya Diaz, Mario Ernesto |
| author_sort | Heinemann, Alexandre B. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Local‐level understanding of within‐season rainfall variability and its relationship with the El Niño Southern Oscillation (ENSO) can shed light on crop yield variations and establish appropriate cropping calendars in rainfed systems. This requires information on the growing season, including its length, the total rainfall, the onset and cessation of rainfall, the number of wet and dry days, and the optimal sowing window. The objective of this study was to examine the onset and cessation of both the rainy and growing seasons using historical daily rainfall datasets (1980–2013) from 50 weather stations distributed across the main grain production region of Brazil. We then correlated the interannual variability of the climate variables and crop water availability with ENSO (using the Oceanic Niño Index, ONI). Across the study region, the onset of the rainy period ranged from late September to early November, and the cessation period ranged from late March to mid‐April. The onset of the growing season followed that of the rainy season, beginning across central and northern Mato Grosso in mid‐October, followed by Goiás and Tocantins, and finally Rondônia by the end of October. The length of the sowing window was reduced, and the mean optimal sowing date was delayed during La Niña years for most weather stations in the study region. Our results infer the need to adjust the cropping calendars for specific ENSO phases only in regions that conduct crop rotations. Based on rice crop model simulations of water availability, we propose a mean optimal crop sowing calendar for annual crops in Central Brazil.We analysed the impact of El Niño Southern Oscillation (ENSO) on the growing season characteristics of Central Brazil. The length of the sowing period is markedly reduced during La Niña years across the region.We analysed the impact of El Niño Southern Oscillation (ENSO) on the growing season characteristics of Central Brazil.The length of the sowing period is markedly reduced during La Niña years across the region.We propose a mean optimal crop sowing calendar for Central Brazil based on crop modelling results of ENSO effects. |
| format | Journal Article |
| id | CGSpace108999 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1089992025-11-11T17:46:17Z The impact of El Niño Southern Oscillation on cropping season rainfall variability across Central Brazil Heinemann, Alexandre B. Ramírez Villegas, Julián Armando Stone, Luís Fernando Garcia Abreu Silva, Ana Paula Henriques da Matta, David Piscoya Diaz, Mario Ernesto crop modelling modelizacion de los cultivos rice arroz rainfall lluvia climate clima Local‐level understanding of within‐season rainfall variability and its relationship with the El Niño Southern Oscillation (ENSO) can shed light on crop yield variations and establish appropriate cropping calendars in rainfed systems. This requires information on the growing season, including its length, the total rainfall, the onset and cessation of rainfall, the number of wet and dry days, and the optimal sowing window. The objective of this study was to examine the onset and cessation of both the rainy and growing seasons using historical daily rainfall datasets (1980–2013) from 50 weather stations distributed across the main grain production region of Brazil. We then correlated the interannual variability of the climate variables and crop water availability with ENSO (using the Oceanic Niño Index, ONI). Across the study region, the onset of the rainy period ranged from late September to early November, and the cessation period ranged from late March to mid‐April. The onset of the growing season followed that of the rainy season, beginning across central and northern Mato Grosso in mid‐October, followed by Goiás and Tocantins, and finally Rondônia by the end of October. The length of the sowing window was reduced, and the mean optimal sowing date was delayed during La Niña years for most weather stations in the study region. Our results infer the need to adjust the cropping calendars for specific ENSO phases only in regions that conduct crop rotations. Based on rice crop model simulations of water availability, we propose a mean optimal crop sowing calendar for annual crops in Central Brazil.We analysed the impact of El Niño Southern Oscillation (ENSO) on the growing season characteristics of Central Brazil. The length of the sowing period is markedly reduced during La Niña years across the region.We analysed the impact of El Niño Southern Oscillation (ENSO) on the growing season characteristics of Central Brazil.The length of the sowing period is markedly reduced during La Niña years across the region.We propose a mean optimal crop sowing calendar for Central Brazil based on crop modelling results of ENSO effects. 2021-01 2020-08-11T19:16:56Z 2020-08-11T19:16:56Z Journal Article https://hdl.handle.net/10568/108999 en Open Access application/pdf Wiley Heinemann, A.B.; Ramirez‐Villegas, J.; Stone, L.F.; Garcia Abreu Silva, A.P.; Henriques da Matta, D.; Piscoya Diaz, M.E. (2020) The impact of El Niño Southern Oscillation on cropping season rainfall variability across Central Brazil. International Journal of Climatology, Online first paper (29 May 2020). 50 p. ISSN: 0899-8418 |
| spellingShingle | crop modelling modelizacion de los cultivos rice arroz rainfall lluvia climate clima Heinemann, Alexandre B. Ramírez Villegas, Julián Armando Stone, Luís Fernando Garcia Abreu Silva, Ana Paula Henriques da Matta, David Piscoya Diaz, Mario Ernesto The impact of El Niño Southern Oscillation on cropping season rainfall variability across Central Brazil |
| title | The impact of El Niño Southern Oscillation on cropping season rainfall variability across Central Brazil |
| title_full | The impact of El Niño Southern Oscillation on cropping season rainfall variability across Central Brazil |
| title_fullStr | The impact of El Niño Southern Oscillation on cropping season rainfall variability across Central Brazil |
| title_full_unstemmed | The impact of El Niño Southern Oscillation on cropping season rainfall variability across Central Brazil |
| title_short | The impact of El Niño Southern Oscillation on cropping season rainfall variability across Central Brazil |
| title_sort | impact of el nino southern oscillation on cropping season rainfall variability across central brazil |
| topic | crop modelling modelizacion de los cultivos rice arroz rainfall lluvia climate clima |
| url | https://hdl.handle.net/10568/108999 |
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