DP - 2017年12月22日，TA - 当前世界环境PG - 530-546 VI - 39 IP - 52 4099 - 4100 www.a-i-l-s-a.com/article/1062/ - www.a-i-l-s-a.com/article/1062/ AB - 它报道说的“热浪”情况的发生在世界不同地区正在增加。这增加了热量的极端预期导致的不适的水平提高到人类。此外，也有工作时间，对健康不利的影响和死亡取决于热量极端的严重程度和持续时间的损失。众所周知的是气象学它不仅是在引起人体不适的温度上升。温度加上高湿度，低风和不适的防渗透的衣服形式主要原因。首先，身体活动类型在这些不利条件正在开展的是决定一个人遇到的应力和应变的重要因素之一。研究生物气象学已经由几个科学家进行了一个多世纪和一些热指数已经开发出量化不适或热应激对他们的工作环境的水平。今天，观察到气象参数以及相应的模型的输出是可以自由地从它可用于在任何位置估计热索引的值几个来源。这两种动力和统计降级方法在这方面是非常有用的。 In this study, some of the commonly used heat indices have been calculated for the four major cities of Delhi, Mumbai, Chennai and Kolkata using daily observed parameters from the India Meteorological Department (IMD) for the period 1975 to 2005. Same indices are also calculated based on the simulated values from the Regional Climate Model (RegCM) of the Abdus Salam International Centre for Theoretical Physics (ICTP) over the same period. The RegCM simulated fields have been obtained from the COordinated Regional Downscaling EXperiments (CORDEX) over the South Asia domain. Comparison of characteristics of the four selected indices based on IMD observed data and RegCM simulations leads to the inference that there are several similarities between the two sets of data in terms of their annual cycles and inter-annual variations. This exercise conclusively shows the advantages of dynamical downscaling. Further, results of this study encourage for a comprehensive work in the future for the country wide mapping and projection of heat indices based on model simulations, development of suitable heat indices and classification of comfort classes for their use in warning system for human health related issues in India.