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A Case Study on Variation of Precipitable Water Vapour for Nimbostratus Clouds
The aim of this paper is to study about detection of Nimbostratus clouds. In recent days the detection of clouds producing precipitation is very necessary for climate research and weather forecasting. Nimbostratus clouds are thick, dark clouds which produces heavy intensity rain. Precipitable Water Vapour (PWV) is a key element which influences atmospheric conditions but is difficult to measure. This study involves the estimation of PWV using temperature and vapour pressure. The brightness temperature observations from 6.7μm water vapour channel are used to calculate the PWV. GRIDSAT data from NOAA’s National Climatic Data Centre is also used in this analysis. The variation of PWV for Nimbostratus clouds for a period May-December 2014 is studied in this paper. The analysis of the results obtained from the proposed method shows that, the Nimbostratus clouds have high PWV values.
Brightness Temperature, Nimbostratus, Precipitable Water Vapour, Upper Tropospheric Humidity
- Patel NR, Shete DT. Analyzing precipitation using concentration indices for north Gujarat agro climatic zone India. Aquatic Procedia. 2015; 4:917–24.
- Erasmus DA, van Rooyen R. A satellite survey of cloud cover and water vapor in northwest Africa and southern Spain. SPIE Astronomical Telescopes + Instrumentation. International Society for Optics and Photonics. 2006.
- Hunerbein A, et al. Combining the perspective of satellite-and ground-based observations to analyze cloud frontal systems. Journal of Applied Meteorology and Climatology.2014; 53(11):2538–52.
- Marin JC, Pozo D, Cure M. Estimating and forecasting the precipitable water vapor from GOES satellite data at high altitude sites. Astronomy and Astrophysics. 2015; 573:A41.
- Kassomenos PA, McGregor GR. The inter-annual variability and trend of precipitable water over southern Greece.Journal of Hydrometeorology. 2006; 7(2):271–84.
- Maghrabi A, Al Dajani HM. Estimation of precipitable water vapour using vapour pressure and air temperature in an arid region in central Saudi Arabia. Journal of the Association of Arab Universities for Basic and Applied Sciences.2013; 14(1):1–8.
- Gettelman A, et al. Climatology of upper-tropospheric relative humidity from the Atmospheric Infrared Sounder and implications for climate. Journal of Climate. 2006;19(23):6104–21.
- Soden BJ, Fu R. A satellite analysis of deep convection, upper-tropospheric humidity, and the greenhouse effect.Journal of Climate. 1995; 8(10):2333–51.
- Knapp KR, Ansari S, Bain CL, Bourassa MA, Dickinson MJ, Funk C, Helms CN, et al. Globally gridded satellite (GridSat) observations for climate studies. 2012.
- Geostationary IR channel brightness temperature-gridsat B1. Available from: http://www.ncdc.noaa.gov/gridsat/index.php
- Global forecast system. Available from: http://www.ncdc.noaa.gov/data-access/model-data/model-datasets/globalforcast-system-gfs
- Student’s cloud observations on-line. Available from: http://science-edu.larc.nasa.gov/SCOOL
- S’COOL overview. Available from: http://science-edu.larc.nasa.gov/SCOOL/scool_transcript.html
- Terra Mission, eo sharing earth observation resources.
- Available from: https://directory.eoportal.org/web/eoportal/satellite-missions/t/terra
- Brightness Temperare. Available from: http://www.remss.com/measurements/brightness-temperature
- Erasmus DA. An analysis of cloud cover and water vapor for the ALMA project. 2002.
- Erasmus DA, van Rooyen R. A satellite survey of cloud cover and water vapor in northwest Africa and Southern Spain. SPIE Astronomical Telescopes + Instrumentation. International Society for Optics and Photonics. 2006.
- Soden BJ, Bretherton FP. Interpretation of TOVS water vapor radiances in terms of layer?average relative humidities: Method and climatology for the upper, middle, and lower troposphere. Journal of Geophysical Research Atmos. 1996 Apr; 101(D5):9333–43.
- Soden BJ, Lanzante JR. An assessment of satellite and radiosonde climatologies of upper-tropospheric water vapor. Journal of Climate. 1996; Jun 9(6):1235–50.
- Wahab MA, Sharif TA. Estimation of precipitable water at different locations using surface dew-point. Theoretical and Applied Climatology. 1995; 51(3):153–7.
- Bolton D. The computation of equivalent potential temperature. Monthly Weather Review. 1980; 108(7):1046–53.
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