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Typhoon Bejisa observed by Megha-Tropiques

23-01-2014

News brief

During its path above Ile de la Réunion on January 2, 2014, the SAPHIR instrument embarked on Megha-Tropiques satellite, captured 21 brightness temperature images showing the evolution of the storm structure from its early stage as a tropical depression, to the full cyclone, and then to the dissipating stage.


Typhoon Bejisa took place in the western part of the Indian Ocean from December 28th, 2013 to January 4th, 2014. The storm center passed approximately 100 km of La Réunion Island in the afternon of January 2nd.


Megha-Tropiques
satellite passed above Ile de la Réunion 2 to 4 times a day during that period. Its instrument SAPHIR was able to capture 21 brightness temperature "images" showing the evolution of the storm structure from its early stage as a tropical depression, to the full cyclone, and then to the dissipating stage. SAPHIR is a six-channel passive microwave sounder onboard the French-Indian Megha-Tropiques mission (ISRO-CNES). The satellite was launched on october 2011 to study the tropical regions and has a low-inclnation orbit (20°) which gives a high revisit rate.


A pdf document with all the images and with the retrieved Upper Tropospheric Humidity can be found on the official science website at http://meghatropiques.ipsl.polytechnique.fr/dmdocuments/Document_Bejisa.pdf



This image is the 183+-11 GHz image on January 1st at 2045 UTC, showing the storm at one of its most intense moment while moving towards La Réunion. The eye and eyewall structure are clearly visible and also the convective rain bands extending to the south-east and affecting la Reunion and Mauritius.


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