Global Warming and Its Potential Impact on Indian Agriculture

Abstract

The greenhouse effect is predicted to produce substantial climatic changes in some places as a result of global warming. Climate change is anticipated to have a significant impact on the hydrological cycle, including precipitation, evapotranspiration, soil moisture, and so on. The primary component of evapotranspiration (ET) is Crop water requirements, as well as future water planning and management, will be influenced by the hydrological cycle. The purpose of this study is to investigate the sensitivity of evapotranspiration to global warming in Rajasthan's desert areas (India). Various studies used the Penman–Monteith equation to calculate reference evapotranspiration, and the sensitivity of ET in terms of temperature, solar radiation, wind speed, and vapor pressure changes within a 20% range from typical long-term climatic conditions during 32 years (1971–2002). The current study did not take into account changes in precipitation or stomatal resistance to increasing CO2 concentrations. According to the reviewed literatures, increasing the temperature by 20 % degrees Celsius (maximum 8 degrees Celsius) increases overall ET consumption by 14.8 percent.