Analyses of several different aspects of the data that reveal both the 

 problems and real changes in the atmospheric circulation are presented, along 

 with a comparison of the monthly mean operational U.S. Navy versus U.S. 



National Meterological Center analyses. A plea is made for a greater effort 

 in archiving quality controlled climatological data. (Authors). 



348 TRENBERTH, K. E. 1981. "Seasonal Variations in Global Sea-Level 

 Pressure and the Total Mass of the Atmosphere," Journal of Geophysical 

 Research . Vol 86, No. C6 , pp 5238-5246. 



The annual cycles of sea- level and surface pressures and the atmospheric 

 pressure owing to water vapor have been analyzed in detail. Global sea-level 

 pressures undergo an annual cycle of 0.5 mbar range with a maximum in the 

 northern winter. Global surface pressures, which represent the total mass of 

 the atmosphere, also undergo an annual cycle of 0.5 mbar range but with the 

 maximum in the southern winter. The changes in water concentrations are re- 

 sponsible for the latter-water vapor has a maximum in the southern winter. 

 The constancy of the mass of dry air is used as a check on the accuracy of 

 computations. The total mass of the atmosphere is 513.7 x 10" kg with a 

 standard error of 0.02 x 10'* kg and an annual cycle of amplitude 0.1 x 

 10'* kg. The corresponding global mean surface pressure of the atmosphere is 

 984.68 mbar. The mean total mass of water vapor is 1 . 3 x 10'* kg which 

 corresponds to 2.53 cm of precipitable water or 12906 km' of water at 0° C. 

 The distribution of pressure and mass as a function of latitude are also 

 presented. (Modified Abstract) . 



349 ULZEGA, A., LEONE, F.. and ORRU, P. 1986. "Geomorphology of Submerged 

 Late Quaternary Shorelines on the Southern Sardinian Continental Shelf," 

 Journal of Coastal Research . Vol SI, No. 1, pp 73-82. 



Various evidence of submerged sea- levels at different depths has been 

 found on the Sardinian continental shelf. In the Gulf of Cagliari in southern 

 Sardinia, the following submerged morphologies are present: marine abrasion 

 platform on the Miocene calcareous bedrock, conglomerates and beach sandstones 

 cemented in an inertial environment, and backshore depressions infilled with 

 fine sediments. The beach rocks at -40 to -60 m are attributed to the 

 Holocene transgression on the basis of a detailed geomorphological study. At 



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