caa a22 4500 605473412 CHVBK 20210128100342.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s00382-014-2243-0 doi (NATIONALLICENCE)springer-10.1007/s00382-014-2243-0 Interannual variability of the Arabian Sea Warm Pool: observations and governing mechanisms [Elektronische Daten] [R. Rao, V. Jitendra, M. GirishKumar, M. Ravichandran, S. Ramakrishna] The near-surface layers in the Arabian Sea progressively warm up from February to early May resulting in the formation of pool of warm waters popularly known as the Arabian Sea Warm Pool (ASWP). The availability of high quality TMI sea surface temperature (SST) data for the years 1998-2010 is exploited to describe the evolution of the ASWP on seasonal and interannual time scales and to explain the associated mechanisms. The multi-year (1998-2010) averaged TMI SSTs during April-May show peak values of the ASWP in excess of 30°C with its core >30.5°C extending offshore as a well-marked southwestward tongue stretching from the southwest coast of India. The ASWP shows both seasonal and interannual variability in the evolution of spatio-temporal characteristics such as amplitude, phase and spatial extent. Among these 13years, the ASWP was most (least) pronounced during 1998, 2003 and 2010 (1999, 2000, 2001 and 2008). The mechanisms that govern the observed interannual variability of the ASWP are examined addressing the most relevant issues such as—(1) dynamic pre-conditioning: background pycnocline topography influenced by the westward propagating Rossby waves during October-May, (2) thermal pre-conditioning: background SST/heat content signal during October-January influenced by the strength of the preceding year's summer monsoon and the post-monsoon cyclones during October-December, (3) haline pre-conditioning: near-surface vertical salinity stratification during November-February influenced by the advection of low saline waters from the Bay of Bengal, (4) influence of surface net heat flux forcing during February-May, and (5) influence of El Nino/La Nina. Springer-Verlag Berlin Heidelberg, 2014 Arabian Sea Warm Pool nationallicence Interannual variability nationallicence Dynamic pre-conditioning nationallicence Thermal pre-conditioning nationallicence Haline pre-conditioning nationallicence Surface net heat flux nationallicence El Nino and La Nina nationallicence Rao R. Department of Meteorology and Oceanography, Andhra University, 530 003, Visakhapatnam, India aut Jitendra V. Department of Meteorology and Oceanography, Andhra University, 530 003, Visakhapatnam, India aut GirishKumar M. Indian National Centre for Ocean Information Services, 500 055, Hyderabad, India aut Ravichandran M. Indian National Centre for Ocean Information Services, 500 055, Hyderabad, India aut Ramakrishna S. Department of Meteorology and Oceanography, Andhra University, 530 003, Visakhapatnam, India aut Climate Dynamics Springer Berlin Heidelberg 44/7-8(2015-04-01), 2119-2136 0930-7575 44:7-8<2119 2015 44 382 https://doi.org/10.1007/s00382-014-2243-0 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/s00382-014-2243-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rao R. Department of Meteorology and Oceanography, Andhra University, 530 003, Visakhapatnam, India aut NATIONALLICENCE 700 1- Jitendra V. Department of Meteorology and Oceanography, Andhra University, 530 003, Visakhapatnam, India aut NATIONALLICENCE 700 1- GirishKumar M. Indian National Centre for Ocean Information Services, 500 055, Hyderabad, India aut NATIONALLICENCE 700 1- Ravichandran M. Indian National Centre for Ocean Information Services, 500 055, Hyderabad, India aut NATIONALLICENCE 700 1- Ramakrishna S. Department of Meteorology and Oceanography, Andhra University, 530 003, Visakhapatnam, India aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 44/7-8(2015-04-01), 2119-2136 0930-7575 44:7-8<2119 2015 44 382