caa a22 4500 605474680 CHVBK 20210128100348.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s00382-014-2282-6 doi (NATIONALLICENCE)springer-10.1007/s00382-014-2282-6 Influence of Pacific Decadal Oscillation on the relationship between ENSO and tropical cyclone activity in the Bay of Bengal during October-December [Elektronische Daten] [M. Girishkumar, V. Thanga Prakash, M. Ravichandran] The relationship between ENSO and tropical cyclones (TCs) activity in the Bay of Bengal (BoB) during October-December under cold (1950-1974) and warm (1975-2006) phase of Pacific Decadal Oscillation (PDO) is investigated. A statistically significant difference in the formation of total number of TCs and intense TCs (Category-1 and above) between El Niño and La Niña years is observed when the PDO was in warm phase. Our analysis shows that, there is a tendency to form more number of TCs during La Niña years (2.62 TCs per season) than during El Niño years (1.6 TCs per season) under warm phase of PDO. Moreover, the difference is quite high for intense TCs cases, such as, relatively more number of intense TCs forms in the BoB during La Niña years (1.4 TCs per season) compared to El Niño years (0.10 TCs per season) under warm phase of PDO. However, the difference in the formation of total number of TCs and intense TCs between La Niña and El Niño years is not significant under cold phase of PDO. Significant enhancement in low level cyclonic vorticity and mid-troposphere humidity during La Niña years compared to El Niño years when the PDO was in warm phase, rather than the PDO was in cold phase leads to this difference. Our analysis further shows that how the ENSO related teleconnection to the Indian Ocean region differ under warm and cold phase of PDO. Springer-Verlag Berlin Heidelberg, 2014 Tropical cyclone nationallicence Bay of Bengal nationallicence El Niño-Southern Oscillation (ENSO) nationallicence Pacific Decadal Oscillation (PDO) nationallicence Girishkumar M. Indian National Centre for Ocean Information Services, 500090, Hyderabad, India aut Thanga Prakash V. Indian National Centre for Ocean Information Services, 500090, Hyderabad, India aut Ravichandran M. Indian National Centre for Ocean Information Services, 500090, Hyderabad, India aut Climate Dynamics Springer Berlin Heidelberg 44/11-12(2015-06-01), 3469-3479 0930-7575 44:11-12<3469 2015 44 382 https://doi.org/10.1007/s00382-014-2282-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00382-014-2282-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Girishkumar M. Indian National Centre for Ocean Information Services, 500090, Hyderabad, India aut NATIONALLICENCE 700 1- Thanga Prakash V. Indian National Centre for Ocean Information Services, 500090, Hyderabad, India aut NATIONALLICENCE 700 1- Ravichandran M. Indian National Centre for Ocean Information Services, 500090, Hyderabad, India aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 44/11-12(2015-06-01), 3469-3479 0930-7575 44:11-12<3469 2015 44 382