Radiation balance in the tropical Atlantic during the Atlantic Expedition ATEX 1969

This paper presents the components of the radiation balance and the balance itself, which are measured from "Meteor" during ATEX from January 1 to March 2, 1969 in the Atlantic Ocean. For "Planet", also engaged in ATEX, measurements of the global radiation are shown for the period of February 4 to February 28, 1969. From the results obtained by "Meteor" the albedo of the sea surface has been calculated and is presented for two exemplary days.

Hourly averages of corrected light scattering integrals in six wavelength investigated during the Atlantic Expedition of RV "Meteor" 1969 (Table 2)

With a 6-channel integrating nephelometer spectral scattering properties of the atmospheric aerosol have been measured during the third part of the Atlantic Expedition 1969. A meridional cross section of light scattering integrals in the wavelength range 0.475 µm to 0.924 µm was recorded reaching from 10° S to 60° N along 30° W. With a new algorithm the time series of hourly scattering spectra was inverted yielding a first meridional cross section of the median radius of the number size distribution in situ. Three air mass regimes could be distinguished in the course of the experiment, the first one being the extremely clean air of the SE-trade south of the ITC. An abrupt increase in light scattering marked the hemispheric change when the ship entered the NE-trade which was heavily loaded with Sahara dust. North of the trade region the ship sailed through maritime North Atlantic air masses with highly variable light scattering and a slow decrease in median radius with latitude.