Introduction Remote sensing monitors Earth from afar using a variety of mostly e
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Introduction Remote sensing monitors Earth from afar using a variety of mostly electronic devices that include aircraft, watercraft, spacecraft, and satellites. The data obtained from these remote sensing devices can be used to collect baseline data, detect change over time, and open previously inaccessible locations to study. Background Questions A1. What advantage does remote sensing offer to environmental scientists in evaluating environmental change? A2. Propose a question that could be evaluated by an environmental scientist using remote sensing data.Explanation / Answer
answer- remote sensing is acquition of an object without any physical contact with the object. it bring information about an area. remote sensing have very important role in environmental stuides. it has been used in climate change patttern. By the MODIS sensor we can automatically detected snow. and it has been also used in cloud mapping.
- NOAA product of daily Northern hemisphere snow and ice fields
- by the ice mapping system and interactive multi sensor snow we can determine the snow of the region and also determine the depletion in northern and southern hemishere.
- by the passive microwave remote sensor we can detect the accumulation and occurence of sea ice.
by the passive microwave remote senson we can determine the sea ice loss and also coverage of sea ice.
answer- the question that evaluate by environmental scientist using remote sensing are following
- how much ice have been reduced in Artic and antarctic region?
- what we can interpret by the depletion of sea ice. how we can determine the ice field are reducing ?
- what are conseqences of global warming.?
- what is NDVI? how much reduction in our tropical rainforest occurs in present centuary?
answer- changes in LAS vagas, Nevada - surface disturbance due to contruction and excavation works, urban expansion, querry operation and reservoir operation
changes in orlando, florida - topographic changes, disturbance due to contruction works
changes in chernobyl, Ukraine- analysis of nuclear disaster in chernobyl. reduction in the vegetational productivity, reduction in surface area due to anthropogenic activity, Landsat 5 image has been generated in which nuclear plant and devasted region is showing.
changes in mount st, helens washington - hylogic monitoring at mount st helens. volcanic hazard monitoring. expansion of pyroclastic flow, long term topographic detection, monitoring lake elevation. monitoring lahars near mount St, helens
changes in lake chad, west africa- changes in the lake chad basin, monitoring lake water elevation, flooding monitoring in adjacent region of lake chad.
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