Objective Determination of the Date of Onset of Monsoon Rainfall over India based on Duration of Persistence
IR@C-MMACS: CSIR-Centre for Mathematical Modelling and Computer Simulation, Bangalore
View Archive Info| Field | Value | |
| Title |
Objective Determination of the Date of Onset of Monsoon Rainfall over
India based on Duration of Persistence
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| Creator |
Goswami, P
Gouda, K C |
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| Subject |
Climate Modelling
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| Description |
The onset of summer monsoon marks the beginning of the main rainy season for a large
population; accurate determination of the day of the onset of monsoon (DOM) rainfall can
be thus a valuable input for many applications. Determination of DOM, however, has been
often difficult because of so called false or ‘bogus’ onset. An objective methodology is
presented here to compute DOM from spatial distribution, rather than isolated station
observations, of rainfall. We introduce duration of persistence and (% of) spatial coverage
of rainfall to avoid false onset. The objective criteria have been calibrated based on daily
gridded rainfall data for 53 years (1951-2003) from the India Meteorological Department
(IMD). The average error in 53 onsets is 3.8 days, with 83% of the cases having error less
than 1 standard deviation and about 15% of the cases with error more than 10 days. The
method can also be used to determine application (requirement) based DOM.
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| Publisher |
CSIR Centre for Mathematical Modelling and Computer Simulation
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| Date |
2007-06
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| Type |
Monograph
NonPeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cir.cmmacs.ernet.in/186/1/rrcm0711.pdf
Goswami, P and Gouda, K C (2007) Objective Determination of the Date of Onset of Monsoon Rainfall over India based on Duration of Persistence. Technical Report. CSIR Centre for Mathematical Modelling and Computer Simulation, C-MMACS,Bangalore 560037,India. (Unpublished) |
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| Relation |
http://cir.cmmacs.ernet.in/186/
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