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The uploaded file contains three separate Python scripts aimed at modeling the sinking velocity of natural Trichodesmium colonies loaded with dust particles. Two scripts have been developed to calculate the dust influencing factor (K), and one script is dedicated to calculating the sinking velocity of particle-free Trichodesmium colonies (v0). All Python scripts are available on GitHub (https://github.com/Zhanzhu1110/Trichobuoyancy.git) and can be processed using the "Codespaces" function on GitHub. The file 'K given values' is a specialized script designed to simulate the dust factor (K), assuming seawater and dust densities of 1028 kg/m3 and 2500 kg/m3, respectively, with a colony radius of 1 mm.

While the summer sea ice extent has beendecreasing in the Artic by 8% per decade for the past 30 years,the ice extent has actually increased slightlyin the Antarctic. Ice thickness changes are less well known. In the central Arctic, sea ice thinned by 43%between 19581976 and 19931997. In the Transpolar Drift, level ice thickness decreased by 20% between1991 and 2001. The interpretation of those changes is difficult, however, as both air and water temperatures,as well as the direction and strength of the wind-driven ice drift, have a strong impact on ice thickness.