Seasonal Anomaly Decomposition: A New Diagnostic Method for Semiannual Periodicity in the Indian Ocean
IR@C-MMACS: CSIR-Centre for Mathematical Modelling and Computer Simulation, Bangalore
View Archive Info| Field | Value | |
| Title |
Seasonal Anomaly Decomposition: A New Diagnostic Method for Semiannual Periodicity in the Indian Ocean
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| Creator |
K S, Yajnik
M K, Sharada P S, Swathi |
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| Subject |
Ocean Modelling
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| Description |
Semi-annual Periodicity is a distinguishing feature of the seasonal cycles in the Indian Ocean. It is most conspicuous in the equatorial region, where Wyrtki (1973) identified an eastward equatorial jet that occurs twice in a year. Does significant semi-annual periodicity occur away from the equator in physical oceanographic variables? Does it also occur in a significant measure in biological and chemical variables? This report presents a method to address these questions. It identifies the semi-annual component of seasonal anomaly and separates it from the rest in an orthogonal decomposition. it leads to an efficient technique for mapping regions of dominant semi-annual component. Application of the method reveals that the semi-annual periodicity is significant away from the equator in the north for several physical, biological and chemical quantities. Two important examples are the sea surface temperature and the air-sea carbon flux. Detection of semi-annual anomaly naturally leads to an enquiry into the underlying mechanisms and into possible consequences and possibly to enhanced understanding of the seasonal cycles in the Indian Ocean.
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| Publisher |
CSIR Centre for Mathematical Modelling and Computer Simulation
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| Date |
2006-11
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| Type |
Monograph
NonPeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cir.cmmacs.ernet.in/291/1/RR%20CM%200603.pdf
K S, Yajnik and M K, Sharada and P S, Swathi (2006) Seasonal Anomaly Decomposition: A New Diagnostic Method for Semiannual Periodicity in the Indian Ocean. 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/291/
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