What is a water Vapour satellite image?
WATER VAPOR IMAGERY: Water vapor satellite pictures indicate how much moisture is present in the upper atmosphere (approximately from 15,000 ft to 30,000 ft). The highest humidities will be the whitest areas while dry regions will be dark. Water vapor imagery is useful for indicating where heavy rain is possible.
How do you read a water vapor chart?
Water vapor imagery is created using a wavelength sensitive to the moisture content in the atmosphere. In this imagery, bright blue and white areas indicate the presence of high water vapor or moisture content, whereas dark orange and brown areas indicate little or no moisture present.
Why can water vapor be detected by satellites?
Sensors on the weather satellites are set to detect the radiation that is emitted by water vapor at specific wavelengths (6.5 to 6.9 microns). Because this is an image of water vapor at high altitudes only, it is possible for a location with high amounts low-level moisture to appear dark.
What is a good source of water vapor?
In addition to the induced changes in water vapor content there are three other< direct, sources of anthropogenic water vapor: 1. Evaporation and transpiration losses from farming and the watering of lawns and landscapes 2. Evaporation losses from canals and artificial lakes including the reservoirs behind dams. 3.
Can you use a water vapor satellite at night?
It is especially useful at night when visible imagery is not available and areas of severe weather need to be identified. When using IR4 imagery, it is important to note that the contrast of the image will vary between day and night.
What human activities increase water vapor?
Agricultural production of food causes water to evaporate into vapour. Large-scale irrigation of fields, for example, increases the amount of water vapour in the atmosphere. Conversely, cutting down trees — or ‘deforestation’ — reduces the amount of water vapour released into the atmosphere.
What is the difference between liquid water and water vapor?
Liquid water changes to water vapor when it evaporates or boils. The gas inside the bubbles of boiling water is water vapor. Water vapor can change back into liquid water when it cools down. Water vapor is always invisible.
What are the three types of satellite?
Types of Satellites and Applications
- Communications Satellite.
- Remote Sensing Satellite.
- Navigation Satellite.
- Geocentric Orbit type staellies – LEO, MEO, HEO.
- Global Positioning System (GPS)
- Geostationary Satellites (GEOs)
- Drone Satellite.
- Ground Satellite.
What is the best source of water vapor?
As the temperature of the atmosphere rises, more water is evaporated from ground storage (rivers, oceans, reservoirs, soil). Because the air is warmer, the relative humidity can be higher (in essence, the air is able to ‘hold’ more water when its warmer), leading to more water vapor in the atmosphere.
Do humans release water vapor?
Water vapour is the most abundant greenhouse gas in the atmosphere, both by weight and by volume (1), (2). The addition of water vapour to the atmosphere, for the most part, cannot be directly attributed to human generated activities.
Do ice liquid water and water vapor have in common?
You have learned how ice, liquid water, and water vapor are the same. They are all made of water molecules, and those water molecules are always moving.