Study of Impact of Linke Turbidity on Solar Radiation over Kathmandu Valley

Abstract

Population growth, mechanization, and industrialization have now made humanity the equivalent of other natural processes in its effect on air-pollution levels and associated climatic change. Link turbidity is an important parameter for assessing the air pollution of Kathmandu (Lat.:27.72^oN, Long.: 85.32^oE and Alt.: 1350 m. above sea level). The Because of the unavailability of spectral measurements, a model has been used to estimate the Linke turbidity factor (TL) from broadband measurements of Global Solar radiation on 2012 by using CMP6 paranometer. The average value of extinction coefficient (K) and Linke turbidity are 0.69 ± 0.03 and 5.53±0.23$ respectively, which can be compared with other sites around the world. Relationship between turbidity co-efficient with meterological parameters (humidity, temperature and water contained) have been investigated further.