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Global warming or the increase of the surface and atmospheric temperatures\udof the Earth, is increasingly discernible in the polar, sub-polar and major\udland glacial areas. The Himalayan and Tibetan Plateau Glaciers, which are\udthe largest glaciers outside of the Polar Regions, are showing a large-scale\uddecrease of snow cover and an extensive glacial retreat. These glaciers such\udas Siachen and Gangotri are a major water resource for Asia as they feed\udmajor rivers such as the Indus, Ganga and Brahmaputra. Due to scarcity of\udground measuring stations, the long-term observations of atmospheric\udtemperatures acquired from the Microwave Sounding Unit (MSU) since 1979–2008\udis highly useful. The lower and middle tropospheric temperature trend based\udon 30 years of MSU data shows warming of the Northern Hemisphere's\udmid-latitude regions. The mean month-to-month warming (up to 0.048±0.026°K/year or 1.44°K\udover 30 years) of the mid troposphere (near\udsurface over the high altitude Himalayas and Tibetan Plateau) is prominent\udand statistically significant at a 95% confidence interval. Though the\udmean annual warming trend over the Himalayas (0.016±0.005°K/year),\udand Tibetan Plateau (0.008±0.006°K/year) is positive, the month to\udmonth warming trend is higher (by 2–3 times, positive and significant) only\udover a period of six months (December to May). The factors responsible for\udthe reversal of this trend from June to November are discussed here. The\udinequality in the magnitude of the warming trends of the troposphere between\udthe western and eastern Himalayas and the IG (Indo-Gangetic) plains is\udattributed to the differences in increased aerosol loading (due to dust\udstorms) over these regions. The monthly mean lower-tropospheric MSU-derived\udtemperature trend over the IG plains (dust sink region; up to 0.032±0.027°K/year) and dust source regions (Sahara desert, Middle East,\udArabian region, Afghanistan-Iran-Pakistan and Thar Desert regions; up to\ud0.068±0.033°K/year) also shows a similar pattern of month-to-month\udoscillation and six months of enhanced and a statistically significant\udwarming trend. The enhanced warming trend during the winter and pre-monsoon\udmonths (December–May) may accelerate glacial melt. The unequal distribution\udof the warming trend over the year is discussed in this study and is\udpartially attributed to a number of controlling factors such as sunlight\udduration, CO<sub>2</sub> trends over the region (2003–2008), water vapor and\udaerosol distribution

Melting of major Glaciers in the western Himalayas: evidence of climatic changes from long term MSU derived tropospheric temperature trend (1979–2008)