Correlation functions of rainfall field and their application in network design in the tropics

Mooley, D. A.; Ismail, Prayoga

doi:10.1007/bf00877035

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Several studies have been carried out on this topic (e.g. Huff and Shipp, 1969;Gandin, 1970;Hendrick and Comer, 1970;Hutchinson, 1970;Stol, 1972;Mooley and Mohamed Ismail, 1982) generally in temperate latitude areas.…”

Section: Introductionmentioning

confidence: 99%

Temporal and spatial rainfall variability in the mountainous region of the reventazón river basin, costa rica

Chacón

Fernández

1985

J. Climatol.

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Two seasonal periods with different rainfall characteristics were identified in the mountainous region of the Reventaz6n River basin, Costa Rica, a region of about 1770 km2 with altitudes in the 5OC-3000 km range. These seasonal periods are December-April, in which orographic rain predominates, and May-November, in which convective showers predominate.The temporal variability of rainfall in the study area was examined using the coefficient of variation. It was found that the largest values of the coefficient of variation occur at high altitudes and the lowest values at middle altitudes.They are large in the December-April period and small in the May-November period. Correlation analysis was used to determine the spatial variability of rainfall in the study area. The results obtained show that the monthly and seasonal values of the correlation coefficient are generally larger than 0.7 over the study area in the December-April period. In the May-November period, the values of the correlation coefficient are in general quite small, less than 0.3 for distances less than 50 km in the case of seasonal totals. In this latter period, a few values of the correlation coefficient larger than 0.7 are observed, but they correspond to areas with correlation radii less than 3 km.

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Section: Introductionmentioning

confidence: 99%

Temporal and spatial rainfall variability in the mountainous region of the reventazón river basin, costa rica

Chacón

Fernández

1985

J. Climatol.

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Evaluation of spatial and temporal characteristics of rainfall in Malawi: a case of data scarce region

Ngongondo

Gottschalk

et al. 2011

Theor Appl Climatol

170

125

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This paper presents the methods, procedure and results in studying spatial and temporal characteristics of rainfall in Malawi, a data scarce region, between 1960 and 2006. Rainfall variables and indicators from rainfall readings at 42 stations in Malawi, excluding Lake Malawi, were analysed at monthly, seasonal and annual scales. In the study, the data were firstly subjected to quality checks through the cumulative deviations test and the standard normal homogeneity test. Spatial rainfall variability was investigated using the spatial correlation function. Temporal trends were analysed using Mann-Kendall and linear regression methods. Heterogeneity of monthly rainfall was investigated using the precipitation concentration index (PCI). Finally, inter-annual and intra-annual rainfall variability were tested using normalized precipitation anomaly series of annual rainfall series (|AR|) and the PCI (|APCI|), respectively. The results showed that (1) most stations revealed statistically non-significant decreasing rainfall trends for annual, seasonal, monthly and the individual months from March to December at the 5% significance level. The months of January and February (the highest rainfall months), however, had overall positive but statistically non-significant trends countrywide, suggesting more concentration of the seasonal rainfall around these months.(2) Spatial analysis results showed a complex rainfall pattern countrywide with annual mean of 1,095 mm centred to the south of the country and mean inter-annual variability of 26%. (3) Spatial correlation amongst stations was highest only within the first 20 km, typical of areas with strong small-scale climatic influence. (4) The country was further characterised by unstable monthly rainfall regimes, with all PCIs more than 10. (5) An increase in inter-annual rainfall variability was found.

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Analysis of Inter-Station Daily Rainfall Correlation During the Southwest Monsoon in the Wet Zone of Sri Lanka

Domroes

Ranatunge

1993

Geografiska Annaler: Series A, Physical Geography

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Correlation functions of rainfall field and their application in network design in the tropics

Cited by 3 publications

References 7 publications

Temporal and spatial rainfall variability in the mountainous region of the reventazón river basin, costa rica

Temporal and spatial rainfall variability in the mountainous region of the reventazón river basin, costa rica

Evaluation of spatial and temporal characteristics of rainfall in Malawi: a case of data scarce region

Analysis of Inter-Station Daily Rainfall Correlation During the Southwest Monsoon in the Wet Zone of Sri Lanka

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