Climate change leaves Assam tea growers in hot water

Amarjyoti Borah in the Guardian (UK): Climate change is affecting the cultivation of Assam tea, with rising temperatures reducing yields and altering the distinctive flavour of India's most popular drink, researchers say. High hills and abundant rainfall make the north-eastern state of Assam an ideal place to grow tea, with 850 gardens over 320,000 hectares (593,000 acres) producing the majority of the country's harvest. But in the last 60 years, rainfall has fallen by more than a fifth and minimum temperature has risen by a degree to 19.5C.

"This is clearly climate change, and it is bound to have major impact on the tea industry," said Debakanta Handique, a climate scientist in Assam. The Tea Board of India said it had recorded a steady decline in tea production in recent years. In 2007, Assam produced 512,000 tonnes of tea. By 2008 this had declined to 487,000 tonnes, with estimated production in 2009 down again to 445,000. A further decrease is expected this year.

Mridul Hazarika, director of Tocklai Tea Research, the oldest tea research station in the world, said rainfall and minimum temperature were two of the most important factors affecting both quality and quantity of harvests.

"The decline has been taking place although there has been an increase in the area of tea cultivation as new gardens have come up, and many gardens have added new areas for tea plantation. This is an indication of the seriousness of the threat," said Hazarika. Efficient rainwater harvesting and new breeds of tea plants were needed to reverse the trend….

Assam green tea, shot by Badagnani, Wikimedia Commons, under the Creative CommonsAttribution 3.0 Unported license