weather data including solar radiation - NARI
weather data including solar radiation - NARI weather data including solar radiation - NARI
100Relative humidity (%)90807060504030y = 0.3116x + 55.407r 2 = 0.3277y = 0.4904x + 75.672r 2 = 0.3623Daily maxDailyaverageDaily miny = 0.1329x + 35.142R 2 = 0.08442019831984198519861987198819891990199119921993199419951996199719981999200020012002200320042005YearsFigure 9 Humidity trendsAverage humidity has increased of 7.2% but the coefficient of determination is only0.33. Thus, more data is needed to validate or refute this trend. An increase inhumidity could again be explained by the increase in biomass in the region.201816Evaporation (mm/d)14121086420DailymaxDailyaveragey = -0.1205x + 6.8454r 2 = 0.641519831984198519861987198819891990199119921993199419951996199719981999200020012002200320042005YearsFigure 10 Evaporation trendsFigure 11 shows a clear decreasing trend for average evaporation. Evaporation is afunction of temperature, wind speed and humidity. A good correlation can be foundbetween wind and evaporation trends indeed since their coefficient of correlation is0.87. Possible increase in humidity might have also played a minor role in this trendbut the coefficient of correlation between the two parameters is only -0.34. Finally,©NARI – September 2006 6/7
the increase in temperature should have tempered the decreasing trend inevaporation but it didn’t seem to have much influence.Even though our data may be inadequate to ascertain trends, we have still recordedclear tendencies towards warming and reduced wind speed and evaporation.Increase in vegetation in the surroundings of Phaltan might have played a role inwind and evaporation trends, but some facts such as the high increase intemperature and the constant monsoon temperature remain unexplained.Composites and average figures can still be used fruitfully by farmers to plan theircrops and anticipate rainfall and temperature variations.References1. Hagan, R. M., Haise, H. R., Edminster T. W. Irrigation of Agricultural Lands.American Society of Agronomy, Madison, 1967, 1180 pages.2. Centre for Science and Environment. Dying wisdom: rise, fall and potential ofIndia’s traditional water harvesting systems. Centre for Science and Environment,New Delhi, 1997, 404 pages.3. Prof. Srinivasan, J., Chairman of mechanical engineering department andprofessor Centre for Atmospheric and Oceanic Sciences, IISc Bangalore. 2006.Personal communication.4. The TTK school atlas. Tamilnad printers & traders Pvt. Ltd. 1985.AcknowledgmentsA. J. is very grateful to NARI staff for providing him with help and advice throughoutthis study. He is especially thankful to A. K. Rajvanshi, director of NARI, and N.Nimbkar, president of NARI, and S. R. Deshmukh, the present in-charge of theweather station. Thanks are due to Nilesh Deshpande for entering all the data in theweather program. Finally, thanks to Dr. Koppar, GOI Meteorological centre, and Prof.Srinivasan, IISc Bangalore, for giving us feedback on our results.HOME©NARI. September 2006©NARI – September 2006 7/7
- Page 1 and 2: Long term weather trends in western
- Page 3: 1488%Rainfall (mm/d)12108641%14% 45
the increase in temperature should have tempered the decreasing trend inevaporation but it didn’t seem to have much influence.Even though our <strong>data</strong> may be inadequate to ascertain trends, we have still recordedclear tendencies towards warming and reduced wind speed and evaporation.Increase in vegetation in the surroundings of Phaltan might have played a role inwind and evaporation trends, but some facts such as the high increase intemperature and the constant monsoon temperature remain unexplained.Composites and average figures can still be used fruitfully by farmers to plan theircrops and anticipate rainfall and temperature variations.References1. Hagan, R. M., Haise, H. R., Edminster T. W. Irrigation of Agricultural Lands.American Society of Agronomy, Madison, 1967, 1180 pages.2. Centre for Science and Environment. Dying wisdom: rise, fall and potential ofIndia’s traditional water harvesting systems. Centre for Science and Environment,New Delhi, 1997, 404 pages.3. Prof. Srinivasan, J., Chairman of mechanical engineering department andprofessor Centre for Atmospheric and Oceanic Sciences, IISc Bangalore. 2006.Personal communication.4. The TTK school atlas. Tamilnad printers & traders Pvt. Ltd. 1985.AcknowledgmentsA. J. is very grateful to <strong>NARI</strong> staff for providing him with help and advice throughoutthis study. He is especially thankful to A. K. Rajvanshi, director of <strong>NARI</strong>, and N.Nimbkar, president of <strong>NARI</strong>, and S. R. Deshmukh, the present in-charge of the<strong>weather</strong> station. Thanks are due to Nilesh Deshpande for entering all the <strong>data</strong> in the<strong>weather</strong> program. Finally, thanks to Dr. Koppar, GOI Meteorological centre, and Prof.Srinivasan, IISc Bangalore, for giving us feedback on our results.HOME©<strong>NARI</strong>. September 2006©<strong>NARI</strong> – September 2006 7/7
Change language