Full formScience
LSTstands forLand Surface Temperature
Full Form of LST
What is LST?
Land Surface Temperature (LST) is a key environmental parameter that measures the temperature of the Earth's surface as sensed from space using satellite-based thermal infrared sensors. It represents the radiative skin temperature of the land, encompassing soil, vegetation, water bodies, and built-up areas. In India, LST data is extensively used by organisations such as the Indian Space Research Organisation (ISRO) and the India Meteorological Department (IMD) for monitoring urban heat islands, assessing drought conditions, managing agricultural water requirements, and studying climate change impacts. The data is derived from satellites like MODIS (Terra and Aqua) and INSAT series, with spatial resolutions ranging from 1 km to 5 km. LST is a critical input for models that predict heatwaves, crop yield, and evapotranspiration. It is particularly relevant for students appearing in competitive exams like UPSC Civil Services, NET Geography, and GATE Earth Sciences, where questions on remote sensing applications and climate variables frequently appear. Understanding LST helps in comprehending broader topics such as energy balance, land-atmosphere interactions, and sustainable urban planning. The parameter is often combined with NDVI (Normalized Difference Vegetation Index) to study vegetation health and surface moisture stress. In Indian classrooms, LST is introduced in undergraduate geography and environmental science curricula, and its practical importance has grown with the increasing frequency of extreme heat events across the country.
LST का फुल फॉर्म
भूमि सतह तापमान
Example
During the 2023 heatwave, IMD utilised LST data from INSAT-3D to issue timely warnings for regions in Uttar Pradesh and Bihar.
LST — frequently asked questions
What is the full form of LST?
The full form of LST is Land Surface Temperature, which refers to the temperature of the Earth's land surface measured from satellites.
How is LST measured?
LST is measured using thermal infrared sensors on satellites like MODIS and INSAT, which detect emitted radiation from the land surface.
Why is LST important for India?
LST is crucial for India as it helps monitor heatwaves, urban heat islands, droughts, and agricultural water stress, aiding climate adaptation and disaster management.