STUDIES ON THE TOTAL COLUMN ATMOSPHERIC AEROSOL OPTICAL DEPTH,
OZONE AND PRECIPITABLE WATER CONTENT IN THE
TROPICS:
TROPICS:
A CASE STUDY OF MALAYSIA
Harisman1)
dan Said Fhazli2)
1)Department of Maintenance - Polytechnic of Kampar.
2)Department of
Physics, Faculty of Mathematic, Natural
and Health Science - Muhammadiyah University of Riau.
E-mail : haris@poltek-kampar.ac.id, sfhazli76@yahoo.com
ABSTRACT
A
Multifilter Rotating Shadowband Radiometer has been used to monitor the
directly transmitted solar irradiance at six wavelength regions (413.9 nm,
494.6 nm, 612.7 nm, 670.8 nm, 868.0 nm and 939.1 nm) for three clear stable
days at Bangi. Extensive observations of the columnar aerosol optical depth
(AOD), total column ozone (TCO) and precipitable water content (PWC) have been
carried out using this instrument. The result shows that the maximum optical
depth of aerosol at the shorter wavelength, especially on 24th February
2002 with mean value of 0.254 (24th February 2002), 0.095 (25th
February 2002), and 0.072 (26th February 2002) while the ozone
optical depth shows the mean value 0.0153 on 24th February 2002,
0.0174 on 25th February 2002 and 0.0175 on 26th February
2002 with the avarage absorption coefficient (a), 0.2 (24th and 26th February 2002) and
0.1 (25th February 2002). The mean value of water vapor content
shows that g = 0.356 cm and k = 0.301 cm for wavelength 939.1 nm. From the aerosol optical
depth, it shows the existence of smoke type of aerosol on February, 24th
to 25th 2002 with Ångström coefficient, a, is 1.534 and 1.5513, respectively, and sea
water vapor is 0.9889 on 26th February 2002. From the Ångström
coefficient, it shows that atmosphere
layer of Bangi at that moment is similar to U.S. Standard Atmosphere, with
maximum spectral irradiance on black body temperature is 5860 oK.
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