气候变化领域集成服务门户(CCPortal): Interannual-to-multidecadal hydroclimate variability and its sectoral impacts in northeastern Argentina

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DOI	10.5194/hess-22-3155-2018
	Interannual-to-multidecadal hydroclimate variability and its sectoral impacts in northeastern Argentina
	Lovino M.A.; Müller O.V.; Müller G.V.; Sgroi L.C.; Baethgen W.E.
发表日期	2018
ISSN	1027-5606
起始页码	3155
结束页码	3174
卷号	22 期号:6
英文摘要	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. 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. © Author(s) 2018.
语种	英语
scopus关键词	Agriculture; Atmospheric pressure; Climatology; Drought; Oceanography; Principal component analysis; Soil moisture; Spectrum analysis; Stream flow; Surface waters; Hydro-power generation; Hydroclimatic variability; Hydrological droughts; Inter-decadal variability; Precipitation variability; Singular spectrum analysis; Soil moisture deficits; Southern oscillation; Surface water resources; annual variation; climate effect; climate forcing; climate variation; decadal variation; El Nino-Southern Oscillation; extreme event; human settlement; hydrometeorology; periodicity; precipitation (climatology); sea surface temperature; streamflow; Argentina; Atlantic Ocean; Atlantic Ocean (South); Indian Ocean; Pacific Ocean; Parana River; Hordeum; Triticum aestivum
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160010
作者单位	Lovino, M.A., Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina, Centro de Estudios de Variabilidad y Cambio Climático (CEVARCAM), Facultad de Ingeniería y Ciencias Hídricas, Universidad Nacional Del Litoral, Santa Fe, Argentina; Müller, O.V., Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina, Centro de Estudios de Variabilidad y Cambio Climático (CEVARCAM), Facultad de Ingeniería y Ciencias Hídricas, Universidad Nacional Del Litoral, Santa Fe, Argentina; Müller, G.V., Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina, Centro de Estudios de Variabilidad y Cambio Climático (CEVARCAM), Facultad de Ingeniería y Ciencias Hídricas, Universidad Nacional Del Litoral, Santa Fe, Argentina; Sgroi, L.C., Centro de Estudios de Variabilidad y Cambio Climático (CEVARCAM), Facultad de Ingeniería y Ciencias Hídricas, Universidad Nacional Del Litoral, Santa Fe, Argentina; Baethgen, W.E., Inte...
推荐引用方式 GB/T 7714	Lovino M.A.,Müller O.V.,Müller G.V.,et al. Interannual-to-multidecadal hydroclimate variability and its sectoral impacts in northeastern Argentina[J],2018,22(6).
APA	Lovino M.A.,Müller O.V.,Müller G.V.,Sgroi L.C.,&Baethgen W.E..(2018).Interannual-to-multidecadal hydroclimate variability and its sectoral impacts in northeastern Argentina.Hydrology and Earth System Sciences,22(6).
MLA	Lovino M.A.,et al."Interannual-to-multidecadal hydroclimate variability and its sectoral impacts in northeastern Argentina".Hydrology and Earth System Sciences 22.6(2018).