Interannual-to-multidecadal hydroclimate variability and its sectoral impacts in northeastern Argentina
This study examines the joint variability of precipitation, river streamflow and temperature over northeastern Argentina; advances the understanding of their links with global SST forcing; and discusses their impacts on water resources, agriculture and human settlements. The leading patterns of...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2018-06-01
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| Series: | Hydrology and Earth System Sciences |
| Online Access: | https://www.hydrol-earth-syst-sci.net/22/3155/2018/hess-22-3155-2018.pdf |
| _version_ | 1817997522169233408 |
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| author | M. A. Lovino M. A. Lovino O. V. Müller O. V. Müller G. V. Müller G. V. Müller L. C. Sgroi W. E. Baethgen |
| author_facet | M. A. Lovino M. A. Lovino O. V. Müller O. V. Müller G. V. Müller G. V. Müller L. C. Sgroi W. E. Baethgen |
| author_sort | M. A. Lovino |
| collection | DOAJ |
| description | This study examines the joint variability of precipitation, river streamflow
and temperature over northeastern Argentina; advances the understanding of
their links with global SST forcing; and discusses their impacts on water
resources, agriculture and human settlements. The leading patterns of
variability, and their nonlinear trends and cycles are identified by means of a
principal component analysis (PCA) complemented with a singular spectrum
analysis (SSA). Interannual hydroclimatic variability centers on two broad
frequency bands: one of 2.5–6.5 years corresponding to El Niño Southern
Oscillation (ENSO) periodicities and the second of about 9 years. The higher
frequencies of the precipitation variability (2.5–4 years) favored extreme
events after 2000, even during moderate extreme phases of the ENSO. Minimum
temperature is correlated with ENSO with a main frequency close to 3 years.
Maximum temperature time series correlate well with SST variability over the
South Atlantic, Indian and Pacific oceans with a 9-year frequency.
Interdecadal variability is characterized by low-frequency trends and
multidecadal oscillations that have induced a transition from dryer and
cooler climate to wetter and warmer decades starting in the mid-twentieth
century. The Paraná River streamflow is influenced by North and South
Atlantic SSTs with bidecadal periodicities.
<br><br>
The hydroclimate variability at all timescales had significant sectoral
impacts. Frequent wet events between 1970 and 2005 favored floods that
affected agricultural and livestock productivity and forced population
displacements. On the other hand, agricultural droughts resulted in soil
moisture deficits that affected crops at critical growth stages.
Hydrological droughts affected surface water resources, causing water and
food scarcity and stressing the capacity for hydropower generation. Lastly,
increases in minimum temperature reduced wheat and barley yields. |
| first_indexed | 2024-04-14T02:39:28Z |
| format | Article |
| id | doaj.art-da31101661da419085a48b2d1e6aee63 |
| institution | Directory Open Access Journal |
| issn | 1027-5606 1607-7938 |
| language | English |
| last_indexed | 2024-04-14T02:39:28Z |
| publishDate | 2018-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Hydrology and Earth System Sciences |
| spelling | doaj.art-da31101661da419085a48b2d1e6aee632022-12-22T02:17:14ZengCopernicus PublicationsHydrology and Earth System Sciences1027-56061607-79382018-06-01223155317410.5194/hess-22-3155-2018Interannual-to-multidecadal hydroclimate variability and its sectoral impacts in northeastern ArgentinaM. A. Lovino0M. A. Lovino1O. V. Müller2O. V. Müller3G. V. Müller4G. V. Müller5L. C. Sgroi6W. E. Baethgen7Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, ArgentinaCentro de Estudios de Variabilidad y Cambio Climático (CEVARCAM), Facultad de Ingeniería y Ciencias Hídricas, Universidad Nacional del Litoral, Santa Fe, ArgentinaConsejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, ArgentinaCentro de Estudios de Variabilidad y Cambio Climático (CEVARCAM), Facultad de Ingeniería y Ciencias Hídricas, Universidad Nacional del Litoral, Santa Fe, ArgentinaConsejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, ArgentinaCentro de Estudios de Variabilidad y Cambio Climático (CEVARCAM), Facultad de Ingeniería y Ciencias Hídricas, Universidad Nacional del Litoral, Santa Fe, ArgentinaCentro de Estudios de Variabilidad y Cambio Climático (CEVARCAM), Facultad de Ingeniería y Ciencias Hídricas, Universidad Nacional del Litoral, Santa Fe, ArgentinaInternational Research Institute for Climate and Society, Columbia University, Palisades, USAThis study examines the joint variability of precipitation, river streamflow and temperature over northeastern Argentina; advances the understanding of their links with global SST forcing; and discusses their impacts on water resources, agriculture and human settlements. The leading patterns of variability, and their nonlinear trends and cycles are identified by means of a principal component analysis (PCA) complemented with a singular spectrum analysis (SSA). Interannual hydroclimatic variability centers on two broad frequency bands: one of 2.5–6.5 years corresponding to El Niño Southern Oscillation (ENSO) periodicities and the second of about 9 years. The higher frequencies of the precipitation variability (2.5–4 years) favored extreme events after 2000, even during moderate extreme phases of the ENSO. Minimum temperature is correlated with ENSO with a main frequency close to 3 years. Maximum temperature time series correlate well with SST variability over the South Atlantic, Indian and Pacific oceans with a 9-year frequency. Interdecadal variability is characterized by low-frequency trends and multidecadal oscillations that have induced a transition from dryer and cooler climate to wetter and warmer decades starting in the mid-twentieth century. The Paraná River streamflow is influenced by North and South Atlantic SSTs with bidecadal periodicities. <br><br> The hydroclimate variability at all timescales had significant sectoral impacts. Frequent wet events between 1970 and 2005 favored floods that affected agricultural and livestock productivity and forced population displacements. On the other hand, agricultural droughts resulted in soil moisture deficits that affected crops at critical growth stages. Hydrological droughts affected surface water resources, causing water and food scarcity and stressing the capacity for hydropower generation. Lastly, increases in minimum temperature reduced wheat and barley yields.https://www.hydrol-earth-syst-sci.net/22/3155/2018/hess-22-3155-2018.pdf |
| spellingShingle | M. A. Lovino M. A. Lovino O. V. Müller O. V. Müller G. V. Müller G. V. Müller L. C. Sgroi W. E. Baethgen Interannual-to-multidecadal hydroclimate variability and its sectoral impacts in northeastern Argentina Hydrology and Earth System Sciences |
| title | Interannual-to-multidecadal hydroclimate variability and its sectoral impacts in northeastern Argentina |
| title_full | Interannual-to-multidecadal hydroclimate variability and its sectoral impacts in northeastern Argentina |
| title_fullStr | Interannual-to-multidecadal hydroclimate variability and its sectoral impacts in northeastern Argentina |
| title_full_unstemmed | Interannual-to-multidecadal hydroclimate variability and its sectoral impacts in northeastern Argentina |
| title_short | Interannual-to-multidecadal hydroclimate variability and its sectoral impacts in northeastern Argentina |
| title_sort | interannual to multidecadal hydroclimate variability and its sectoral impacts in northeastern argentina |
| url | https://www.hydrol-earth-syst-sci.net/22/3155/2018/hess-22-3155-2018.pdf |
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