Relationship Between Surface Dew Point Temperature and Satellite Based Total Water Vapor Content over North Indian Ocean

C Purna Chand,K V.S.R Prasad,M V Raob

doi:10.33687/jsas.009.02.3660

Abstract

The dew point temperature is related to the total water vapor content available in the atmosphere column. In this study, Water Vapor Content (WVC) from Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) and Relative humidity from Research Moored Array for African-Asian-Australian Monsoon Analysis (RAMA) buoy data has been utilized to make a relationship between satellite measured WVC and Dew point temperature. This study focuses on the development of an algorithm to estimate the surface dew point temperature from satellite-based WVC. Regression coefficients are established using 9-years (2004-2012) data of Dew point Temperature computed from Relative humidity and satellite measured WVC. 1594 data points are observed weekly, mean monthly collocated data points are considered to examine the relationship between Dew point temperature and WVC.

Highlights

Dew point temperature or surface moisture content is one of the important parameters in the estimation of evaporation rates over the oceans
The surface level humidity is an indicator of dew point temperature; many researchers studied the relationship between the logarithmic water vapor content and the dew point temperature, reported that wvc and dewpoint temperatures are highly correlated (Reitan 1963, Bolsenga 1965, Smith 1966, Lowry and Glahn 1969, Tomasi 1981, Liu and Niiler 1984., Liu 1986, Rao et al 1986, Mears 2007.)
We made an attempt to develop the relationship between the total water vapor content and the dew point temperature over the North Indian Ocean using collocated data set created with Research Moored Array for African-Asian-Australian Monsoon Analysis (RAMA) buoy data and TMI data

Summary

Introduction

INTRODUCTION Dew point temperature or surface moisture content is one of the important parameters in the estimation of evaporation rates over the oceans. Need to find out a method to estimate the dew point temperature or relative humidity from available satellite data. All these studies carried out in the view of measurements of total perceptible water over oceans is very difficult, the estimation of this parameter can be made possible through the measurement of surface dew point temperature.

Results

Conclusion