Header menu link for other important links
X
Nowcasting of rain events using multi-frequency radiometric observations
R CHAKRABORTY, S DAS, S JANA, A MAITRA
Published in Elsevier
2014
Volume: 513
   
Pages: 467 - 474
Abstract
Nowcasting of heavy rain events using microwave radiometer has been carried out at Kolkata (22.65°N, 88.45°E), a tropical location. Microwave radiometer can produce the temperature and humidity profiles of the atmosphere with fairly good accuracy. Definite changes are observed in temperature and humidity profiles before and at the onset of heavy rain events. Concurrent changes in the brightness temperatures (BT) at 22. GHz and 58. GHz are found to be suitable to nowcast rain. The time derivatives of brightness temperatures at 22. GHz and 58. GHz are used as inputs to the proposed nowcasting model. In addition, the standard deviation of the product of these time derivatives is also considered. The model has been developed using the data of 2011 and validated for rain events of 2012-2013 showing a prediction efficiency of about 90% with alarm generated about 25. min in advance. © 2014 Elsevier B.V.
About the journal
JournalData powered by TypesetJournal of Hydrology
PublisherData powered by TypesetElsevier
ISSN0022-1694