C.s. Gopakumar

• PhD in Agricultural Meteorology
• Scientific Officer at Academy of climate change education and research

The dominant spices in India like black pepper, small and large cardamom, ginger, turmeric, dry chilli, cinnamon, clove, nutmeg coriander, fenugreek, other seed spices, and so on are going to respond with varied intensity and distribution to weather phenomena like humidity, rainfall, temperature, and of course the frequency of weather aberrations f...

Kerala state in India has rich bio-diversity and tropical rain forests and is spread in 13 agro-ecological zones under the humid tropics. Rainfall decline (annual as well as monsoon), increase in temperature and climate shift towards lesser humid zones within the humid climate are the notable characteristics of the state. Cropping system changes, a...

Non parametric Bernstein polynomial estimator for circular data was applied for fitting daily wind directions. Since Thrissur District of Kerala faces a special type of wind called Vruschikakkaatu in November to February season and there is a decrease of such wind speed year after year, an analysis was conducted to check whether there is variation...

A novel attempt has been made to construct prediction models for weather parameters of Thrissur District in Kerala using SARIMA (Seasonal Auto Regressive Integrated Moving Average) models. Assessment of trend and identification of the best SARIMA model for forecasting weather in Thrissur District were the major objectives of the study. Excellent pa...

In India, increase in mean annual maximum temperature was 0.76°C and mean minimum temperature was 0.22°C. Increase in annual mean temperature was 0.49°C during the period, commencing from 1901 to 2003. In terms of increase in temperature, the West Coast of India is warmer, followed by the Northeast India and the Western Himalayas when compared to o...

Attempts were made to study temporal variation in monthly, seasonal and annual rainfall over Kerala, India, during the period from 1871 to 2005. Longterm changes in rainfall determined by Man-Kendall rank statistics and linear trend. The analysis revealed significant decrease in southwest monsoon rainfall while increase in post-monsoon season over...

The UV-B radiation was of the order of more than one MED/hr between 10.30 a.m. and 2.30 p.m., reaching to its maximum of more than two and two-and-a-half MED/hour for about two to three hours during the peak noon hours. It crossed even more than 3MED/hr on 12.9.2002. It was high in the year 2002 when compared to that of 2003, 2004 and till June, 20...

Rainfall and number of rainy days showed declining trend during the southwest monsoon (June-September) at four selected locations viz., Pilicode, Vellanikkara Amabalavayal and Pampadumpara across Kerala State, India with a maximum rate of 22.0 mm/year at Vellanikkara in the case of rainfall. Significant decline in rainfall from 2000 to 2005 was ref...

There was a decline in southwest monsoon and annual rainfall since 1951 onwards at the rate of 5.2mm/year and 5.6 mm/year, respectively. The climate over Kerala also shifted from wetness to dryness within the humid climate (B 4 to B 3) during the study period from 1951 to 2007. There was a shift in cropping systems across the State of Kerala as the...

Bud break in cashew (Annacardium occidentale L.) followed immediately after heavy wet spell of rains in the presence of bright sunshine showed dependence on the genotype. The following of cashew required mild winter, which may be defined as 'low minimum surface air temperature ranging between 16 and 20°C coupled with more dew nights having moderate...