Two centuries of hydroclimatic variability reconstructed from tree-ring records over the Amazonian Andes of Peru
Almost half of the tributaries of the Amazon River originate in the tropical Andes and support large populations in mountain regions and downstream areas. However, it is difficult to assess hydroclimatic conditions or to evaluate future scenarios due to the scarcity of long, high‐quality instrumenta...
| Main Authors: | , , , , , , , |
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| Format: | info:eu-repo/semantics/article |
| Language: | Inglés |
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American Geophysical Union
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/20.500.12955/2178 https://doi.org/10.1029/2020JD032565 |
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| author | Humanes Fuente, V. Ferrero, M. E. Muñoz, A. A. González Reyes, Á. Requena Rojas, E. J. Barichivich, J. Inga, J. G. Layme Huaman, Eva Trinidad |
| author_browse | Barichivich, J. Ferrero, M. E. González Reyes, Á. Humanes Fuente, V. Inga, J. G. Layme Huaman, Eva Trinidad Muñoz, A. A. Requena Rojas, E. J. |
| author_facet | Humanes Fuente, V. Ferrero, M. E. Muñoz, A. A. González Reyes, Á. Requena Rojas, E. J. Barichivich, J. Inga, J. G. Layme Huaman, Eva Trinidad |
| author_sort | Humanes Fuente, V. |
| collection | Repositorio INIA |
| description | Almost half of the tributaries of the Amazon River originate in the tropical Andes and support large populations in mountain regions and downstream areas. However, it is difficult to assess hydroclimatic conditions or to evaluate future scenarios due to the scarcity of long, high‐quality instrumental records. Data from the Global Precipitation Climatology Project (GPCP) provide a complete record since 1979 and offer a good representation of rainfall over the tropical Andes. Longer records are needed to improve our understanding of rainfall variability and summer monsoon behavior at various scales. We developed the first annually resolved precipitation reconstruction for the tropical Andes in Peru, based on tree‐ring chronologies of Cedrela and Juglans species. The annual (November–October) reconstruction extends the short instrumental records back to 1817, explaining 68% of the total variance of precipitation over the 1979–2007 calibration period. The reconstruction reveals the well‐documented influence of El Niño‐ Southern Oscillation (ENSO) on Amazon Rainfall at interannual scales (~19% of total variance) and significant multidecadal variability with alternating periods of about 40 years (~13% of rainfall variability) related to the Atlantic Multidecadal Oscillation (AMO). Both oscillatory modes can explain dry and humid periods observed within the reconstruction and are likely associated with the negative trends of rainfall in the short instrumental records and the increased drought recurrence in recent decades. Our results show that montane tropical tree rings can be used to reconstruct precipitation with exceptionally high fidelity, characterize the interannual to multidecadal variability, and identify remote forcings in the hydroclimate over the Andean Amazon Basin of Peru. |
| format | info:eu-repo/semantics/article |
| id | INIA2178 |
| institution | Institucional Nacional de Innovación Agraria |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | American Geophysical Union |
| publisherStr | American Geophysical Union |
| record_format | dspace |
| spelling | INIA21782023-09-22T03:15:46Z Two centuries of hydroclimatic variability reconstructed from tree-ring records over the Amazonian Andes of Peru Humanes Fuente, V. Ferrero, M. E. Muñoz, A. A. González Reyes, Á. Requena Rojas, E. J. Barichivich, J. Inga, J. G. Layme Huaman, Eva Trinidad Amazonian montane forests Precipitation reconstruction SAMS South America Tree rings Tropical Andes https://purl.org/pe-repo/ocde/ford#4.01.02 Growth rings Hydroclimatology Anillo de crecimiento Hidroclimatología Almost half of the tributaries of the Amazon River originate in the tropical Andes and support large populations in mountain regions and downstream areas. However, it is difficult to assess hydroclimatic conditions or to evaluate future scenarios due to the scarcity of long, high‐quality instrumental records. Data from the Global Precipitation Climatology Project (GPCP) provide a complete record since 1979 and offer a good representation of rainfall over the tropical Andes. Longer records are needed to improve our understanding of rainfall variability and summer monsoon behavior at various scales. We developed the first annually resolved precipitation reconstruction for the tropical Andes in Peru, based on tree‐ring chronologies of Cedrela and Juglans species. The annual (November–October) reconstruction extends the short instrumental records back to 1817, explaining 68% of the total variance of precipitation over the 1979–2007 calibration period. The reconstruction reveals the well‐documented influence of El Niño‐ Southern Oscillation (ENSO) on Amazon Rainfall at interannual scales (~19% of total variance) and significant multidecadal variability with alternating periods of about 40 years (~13% of rainfall variability) related to the Atlantic Multidecadal Oscillation (AMO). Both oscillatory modes can explain dry and humid periods observed within the reconstruction and are likely associated with the negative trends of rainfall in the short instrumental records and the increased drought recurrence in recent decades. Our results show that montane tropical tree rings can be used to reconstruct precipitation with exceptionally high fidelity, characterize the interannual to multidecadal variability, and identify remote forcings in the hydroclimate over the Andean Amazon Basin of Peru. 2023-06-05T17:17:55Z 2023-06-05T17:17:55Z 2020-09-09 info:eu-repo/semantics/article Humanes‐Fuente, V., Ferrero, M. E., Muñoz, A. A., González‐Reyes, Á., Requena‐Rojas, E. J., Barichivich, J., et al. (2020). Two centuries of hydroclimatic variability reconstructed from tree‐ring records over the Amazonian Andes of Peru. Journal of Geophysical Research: Atmospheres, 125(18), e2020JD032565. doi: 10.1029/2020JD032565 2169-897X https://hdl.handle.net/20.500.12955/2178 https://doi.org/10.1029/2020JD032565 eng Journal of Geophysical Research: Atmospheres info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ application/pdf application/pdf American Geophysical Union US Instituto Nacional de Innovación Agraria Repositorio Institucional - INIA |
| spellingShingle | Amazonian montane forests Precipitation reconstruction SAMS South America Tree rings Tropical Andes https://purl.org/pe-repo/ocde/ford#4.01.02 Growth rings Hydroclimatology Anillo de crecimiento Hidroclimatología Humanes Fuente, V. Ferrero, M. E. Muñoz, A. A. González Reyes, Á. Requena Rojas, E. J. Barichivich, J. Inga, J. G. Layme Huaman, Eva Trinidad Two centuries of hydroclimatic variability reconstructed from tree-ring records over the Amazonian Andes of Peru |
| title | Two centuries of hydroclimatic variability reconstructed from tree-ring records over the Amazonian Andes of Peru |
| title_full | Two centuries of hydroclimatic variability reconstructed from tree-ring records over the Amazonian Andes of Peru |
| title_fullStr | Two centuries of hydroclimatic variability reconstructed from tree-ring records over the Amazonian Andes of Peru |
| title_full_unstemmed | Two centuries of hydroclimatic variability reconstructed from tree-ring records over the Amazonian Andes of Peru |
| title_short | Two centuries of hydroclimatic variability reconstructed from tree-ring records over the Amazonian Andes of Peru |
| title_sort | two centuries of hydroclimatic variability reconstructed from tree ring records over the amazonian andes of peru |
| topic | Amazonian montane forests Precipitation reconstruction SAMS South America Tree rings Tropical Andes https://purl.org/pe-repo/ocde/ford#4.01.02 Growth rings Hydroclimatology Anillo de crecimiento Hidroclimatología |
| url | https://hdl.handle.net/20.500.12955/2178 https://doi.org/10.1029/2020JD032565 |
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