Analysis 



By using pre-selected environmental data, a parametric study was conducted to compare 

 the melt estimates of the WM of BAPSNT 1.4 with the estimates of the WIM of BAPSNT 1.7. 

 Environmental parameters (SST, wave height, and wave period) were used to test the algorithm of 

 these models. Three modeling series were conducted, each consisting of two constant and one 

 varied parameter (Table 1). This approach not only allowed simple comparison of melt rates but 

 also parameter sensitivity. The selection of metric and non-metric units is a function of the 

 parameter files. For the purpose of BAPS calculations, SST is given in Celsius, wave height in 

 feet, and wave period in seconds. 



The first series of runs modeled the effect of SST on deterioration, while holding wave 

 height and wave period constant. It was found that 1 .4 and 1 .7 melt linearly and at the same rate. 

 This result is depicted in Figure 1 . The 1 .4 and 1 .7 results for the growler melt were not exactly 

 the same due to an unaccounted-for variation in starting-length parameter between the models, 

 which is discussed below. 



0) 



Percent Melt vs. Time 



1.4 Growler 

 1 .7 Growler 

 1.4 & 1.7 Small 

 1.4 & 1.7 Medium 

 1.4 & 1.7 Large 



5 6 



Time (Days) 



8 



10 



Figure 1: The percent melt for each iceberg for both WIM's during the first 10 days of the run. 

 This run was conducted at an SST of 12°C, wave height of 4ft, and wave period of 8 seconds. The 

 small, medium, and large icebergs produced similar results. 



The second series of runs modeled the effect of wave period on deterioration, while 

 holding SST and wave height constant. The 1.4 and 1.7 WIMs melted linearly and at the same 



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