Redirigiendo al acceso original de articulo en 20 segundos...
Inicio  /  Atmósfera  /  Vol: 33 Núm: 1 Par: 0 (2020)  /  Artículo
ARTÍCULO
TITULO

Spatio-temporal analysis of the droughts in Cali, Colombia and their primary relationships with the El Niño-Southern Oscillation (ENSO) between 1971 and 2011

Wilmar Loaiza Cerón    
Yesid Carvajal-Escobar    
Rita Valeria Andreoli de Souza    
Mary Toshie Kayano    
Nathalia González López    

Resumen

This paper analyzed the spatio-temporal variability of droughts in Cali, Colombia and their primary relations to the El Niño Southern Oscillation (ENSO). The Standardized Precipitation Index (SPI) was used to detect drought events from monthly rainfall data of 24 stations well spread over Cali during 1971-2011. The SPI provided the drought intensity, magnitude, frequency, and the minimum rainfall thresholds, mainly on an annual scale (SPI-12). Eighty percent of the stations reported four events with dry conditions in Cali: 1976-1977, 1983-1984, 1990-1992 and 2009-2010. The ENSO influence was evaluated using the correlation and wavelet transform analyses. Significant (non-significant) negative correlations between SPI-12 in the northern (southern) part of Cali, the multivariate ENSO Index (MEI), and Sea Surface Temperature (SST) Niño 3.4 and Niño 4 indices were observed. The wavelet coherence analysis showed significant coherencies between ENSO and SPI-12: at interannual scale (4-6 years), the phase difference of ?135º generates a lag of 6-9 months between the minimum peak of the SPI-12 and the maximum peak of the indices. On the quasi-biennial scale (2-3 years), the phase difference of ?180º suggests that the maximum wet (dry) conditions coincide with the mature stage of the La Niña (El Niño) event; and on the decadal scale (8-16 years), the decreases (increases) in rainfall precede the El Niño (La Niña) mature stage by approximately 10-18 months. These results are relevant for seasonal forecasting, since changes in SST in the equatorial Pacific may take place 6-18 months ahead of the dry conditions in Cali.

 Artículos similares

       
 
Zhi Zhang, Zhiwei Wan, Shan Xu, Hong Wu, Lingyue Liu, Zhao Chen and Ji Zeng    
The relationship between regional human development and geographic environment is the basis for dynamic social change, and studying the evolution of human-land relations in typical regions can provide background knowledge for global change studies. This ... ver más

 
Xiaoyan Zhao, Youjin Su and Guangming Wang    
In the present study, seismic gaps were identified as periods with no occurrence of M = 4.0 earthquake over dT = 400 days. After examining all records in the Sichuan?Yunnan?Tibet?Qinghai junction area on the southeastern margin of the Tibetan Plateau in ... ver más
Revista: Applied Sciences

 
Yelong Zhao, Jinsong Chen and Xiaoli Li    
Guangzhou and Shenzhen are two core cities in the Guangdong-Hong Kong-Macao Greater Bay Area (GBA). It is increasingly important to regulate water quality in urban development. The Forel?Ule Index (FUI) can be obtained by optical data and is an important... ver más
Revista: Applied Sciences

 
Yifei Jiang, Weimin Zhang, Huizan Wang and Xiaojiang Zhang    
Symmetric instability (SI) is credited with one of the important submesoscale instabilities. However, due to its small scales, it is challenging to capture using current observational measurements and ocean models. Estimates of SI activity are useful for... ver más

 
Bo Yang, Hesen Yang, Chuanbiao Zhang, Ning Zhao, Hua Liang and Dongsheng Zhang    
Compression corner shock wave/boundary layer interaction (SWBLI) is a typical shock wave/boundary layer interaction (SWBLI) problem in supersonic/hypersonic flows. In previous studies, the separation flow is usually caused by a single shock wave. However... ver más
Revista: Aerospace