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Business Daily from THE HINDU group of publications Monday, Jun 16, 2008 ePaper | Mobile/PDA Version | Audio |
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Climate & Weather Agri-Biz & Commodities - Climate & Weather Web Extras - Economy Monsoon enters Delhi; only Rajasthan left now 
Vinson Kurian
Thiruvananthapuram, June 15 The monsoon entered Delhi on Sunday in what is the earliest known onset over the National Capital in over 100 years and set a punishing pace as it scurried through Rajasthan, the last frontier to be covered in the record-breaking run. Formation of a ‘low’ in northwest Bay of Bengal, a western disturbance with an embedded cyclonic circulation over Haryana and enhanced incursion of moisture from the Arabian Sea will help it retain the 14-day lead time in covering the entire country in the next three days. Other factors expected to fuel its run is the well-defined east-to-west seasonal trough across the Indo-Gangetic plains and the heavy rain from convective activity over the western Himalayan region and adjoining plains, India Meteorological Department (IMD) said. TROUGH IN PLACEOn Sunday, the seasonal land-based trough extended from Ferozepur, Mainpuri, Varanasi, Midnapore, Sagar Island, the centre of the ‘low’ and further southeastward into east-central Bay of Bengal. As on date, the monsoon advanced into most parts of Arabian Sea, entire Gujarat, Madhya Pradesh, Uttar Pradesh, Punjab and some more parts of Rajasthan and Haryana, including Delhi. The northern limit passed through Mount Abu, Bhilwara, Sawai Madhopur, Agra, Delhi and Sri Ganganagar. The ‘low’ in the Bay off the Orissa and West Bengal coasts will trigger enhanced rainfall activity over east India over the next four days. Widespread rainfall activity with heavy to very heavy falls is also likely over the western Himalayan region and the northern plains during the next three days. A warning with respect to the possibility of isolated heavy to very heavy rainfall will be valid for Jammu and Kashmir, Himachal Pradesh, Uttarakhand, Punjab, Haryana, Delhi, Uttar Pradesh, Bihar and Orissa. Isolated heavy rainfall is likely over Gangetic West Bengal, Konkan, Goa and coastal Karnataka. DRY IN SOUTHMeanwhile, the southernmost peninsula (within the 10 deg N latitude covering southern parts of Kerala and Tamil Nadu) continued to spook forecasters with markedly reduced rainfall even as the rest of the country experienced normal or above normal rainfall.
Speaking to Business Line, Dr C.K. Rajan, Honorary Director, Centre for Monsoon Studies, Cochin University of Science and Technology (Cusat), said that this was a replay of conditions obtaining during years 2003 and 2004. Wind speeds and other parameters as monitored on satellite pictures on Sunday would theoretically represent an active phase of the monsoon on the west coast. But most of the moisture was being appropriated by the `low’ in the Bay which was in turn dumped as rain over Delhi and further north. The prevailing conditions in the south resembled one of a localised ‘break monsoon’, which in actuality is taken to mean the dry phase occurring after the monsoon runs through its most active phase across the country. The increased frequency of the freak weather in the extreme south, where short spells of intense and flooding rainfall is followed by long dry periods, is a trend suggestive of the outcome of the larger issue of global warming. This calls for coordinated action aimed at harvesting of available rainwater, Dr Rajan said. All the more so since the terrain features are such that the heavy precipitation results in massive run-off, without having any beneficial impact on sub-soil moisture. More Stories on : Climate & Weather | Climate & Weather | Economy
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