Land surface air temperature mapping using TOVS and AVHRR

Abstract

Surface air temperature is an important variable in land surface hydrological studies. This paper evaluates the ability of satellites to map air temperature across large land surface areas. Algorithms recently have been developed that derive surface air temperature using observations from the TOVS (TIROS Operational Vertical Sounder) suite of instruments and also from the AVHRR (Advanced Very High Resolution Radiometer), which have own on the NOAA operational sun synchronous satellites TIROS-N NOAA-14. In this study we evaluate TOVS soundings from NOAA-10 (nominal local time of overpass 7:30 a.m./p.m.) and data from AVHRR aboard NOAA-9 (nominal local time 2:30 a.m./p.m.). Instantaneous estimates from the AVHRR and TOVS were compared with the hourly ground observations collected from 26 meteorological stations in the Red River-Arkansas River basin for a 3-month period from May to July 1987. Detailed comparisons between the satellite and ground estimates of surface air temperatures are reported and the feasibility of estimating the diurnal variation is explored. The comparisons are interpreted in the geographical context, i.e. land cover and topography, and in the seasonal context, i.e. early and midsummer. The results show that the average bias over the 3-month period compared with ground-based observations is approximately 2ß C or less for the three times of day with TOVS having lower biases than AVHRR. Knowledge of these error estimates will greatly bene t use of satellite data in hydrological modelling.

Estimation of diurnal air temperature using MSG SEVIRI data in West Africa

“…Czajkowski et al (1997b) used a value of 0.7 for the BOREAS site in central Canada using top of atmosphere AVHRR data and 0.65 applied to the Oklahoma Mesonet site (Czajkowski et al, 2000). Lakshmi et al (2001) estimated NDVI max = 0.7 for the Red-Arkansas River basin using a radiation model simulating AVHRR data. Using the TVX relation (Price, 1990), estimated vegetation temperatures from AVHRR data by assuming NDVI max = 0.65.…”

A New Contextual Parameterization of Evaporative Fraction to Reduce the Reliance of the Ts − VI Triangle Method on the Dry Edge

“…The method known as the temperature-vegetation index method (TVX) can be described as a representative, which has been applied widely to estimate near surface air temperature (T a ) from several satellite sensors [35][36][37][38][39][40]. According to this method, remotely sensed T s tends to approach air temperature with increasing Remote Sens.…”

Estimation of Land Surface Temperature through Blending MODIS and AMSR-E Data with the Bayesian Maximum Entropy Method

“…In contrast, satellite remote sensing provides ways to estimate LST at dense spatial sampling intervals and large scales. Various methods for estimating LST from remote sensing data have been extensively implemented since the 1990s [7][8][9][10][11][12][13][14][15]. Among them, most can be classified into two main methods.…”