Skip to main content

Advertisement

Log in

Dynamic and thermodynamic upper-ocean response to the passage of Bay of Bengal cyclones ‘Phailin’ and ‘Hudhud’: a study using a coupled modelling system

  • Published:
Environmental Monitoring and Assessment Aims and scope Submit manuscript

Abstract

Understanding the upper-ocean response to tropical cyclones (TCs) in terms of sea surface temperature (SST) cooling is of prime importance in the prediction of TC intensity. However, the magnitude of cooling during the passage of TC varies depending on storm characteristics and pre-existing upper-ocean conditions such as the presence of ocean eddy and upper-ocean stratification. The present study investigates the upper-ocean response to two post-monsoon Bay of Bengal (BoB) cyclones, Phailin (October 2013) and Hudhud (October 2014), those followed almost a similar track, in association with pre-existing oceanic conditions using a fully coupled ocean-atmosphere modelling system. The spatial structure and temporal evolution of SST cooling induced by the two cyclones and the physical processes governing the cooling are examined. Analysis shows that the intensity of Phailin is significantly reduced when it encountered the regime of lower tropical cyclone heat potential (TCHP) associated with pre-existing cold core eddy (CCE). Intense upwelling with an average of 0.6 m/h is observed over CCE that resulted in strong temperature tendency of − 4.2 °C prior to landfall. Though average TCHP in the generation region of Hudhud was 50 kJ/cm2, the storm drew sufficient energy from the underlying ocean due to its slow translation speed. Presence of shallow thermocline over extended region and weaker upper-ocean stratification enhanced SST cooling over a larger region after passage of the TC Hudhud. Finally, the present study brings in clarity that the upper-ocean condition and the relative position of the mesoscale oceanic features to the storm track are responsible for the intensification of the TC and the recovery of the ocean surface.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13
Fig. 14
Fig. 15
Fig. 16

Similar content being viewed by others

References

Download references

Acknowledgments

Daily optimum interpolation SST (OISST) and chlorophyll a (Chl-a) concentration are obtained from APDRC (http://apdrc.soest.hawaii.edu/index.php). The sea surface height and the geostrophic currents are provided by AVISO (http://www.aviso.altimetry.fr/en/data/products/sea-surface-height-products/global.html). Argo temperature data is obtained from CORIOLIS (http://www.coriolis.eu.org/). The initial and boundary condition for both ARW-WRF and ROMS model were derived from the latest version of Climate Forecast System (CFSv2) operational analyses developed in the NCEP.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Mihir Kumar Dash.

Additional information

Publisher’s note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

This article is part of the Topical Collection on Terrestrial and Ocean Dynamics: India Perspective

Electronic supplementary material

ESM 1

(DOCX 424 kb)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Dutta, D., Mani, B. & Dash, M.K. Dynamic and thermodynamic upper-ocean response to the passage of Bay of Bengal cyclones ‘Phailin’ and ‘Hudhud’: a study using a coupled modelling system. Environ Monit Assess 191 (Suppl 3), 808 (2019). https://doi.org/10.1007/s10661-019-7704-9

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s10661-019-7704-9

Keywords

Navigation