ANNOUNCEMENTS
The study has derived a relation based on surface wind speed with aerosol optical depth in marine condition for the period of 18 years (2003-2021) over Mauna Loa (Hawaii). The research is examining the influence of surface wind in contributing the AOD concentration over the oceanic surface. The daily averaged AOD level-3 data from Moderate Resolution Imaging Spectroradiometer (MODIS) and the level-2 data from ground-based measurement using sun- photometer has been collected from Mauna Loa aerosol robotic network (AERONET) observatory. The MODIS adjusted AOD is plotted against wind speed which is based on power law fit. However, the MODIS adjusted AOD is calculated by substruction of AERONET AOD from the MODIS AOD values. This adjustment of AOD values has been done in order to reduce the contribution of aerosol above the planetary boundary.
The study also agrees reasonably with validation of aerosol optical depth as the AOD taken from satellite-based MODIS and ground based (sunphotometer) AERONET denotes a correlation value r=0.28.
The study is successful in examining the previous AOD trends over the past two decades. Study also illustrates reasonable deviation from the past studies performed in the marine atmosphere.
Key words- Aerosol, AOD, surface wind speed, MODIS adjusted AOD, whitecaps.
