The images are records of antarctic expeditions where amongst other things photos were taken of iceberg 'calvings,' where a large iceberg breaks up into smaller pieces. the pictures were taken from 2000, until the end of the Antarctic research season in 2006, on page 3. The clipped pictures,are icon sized, but can be seen with greater magnification at the site.
Due to the relationship between surface area and volume, the smaller icebergs become, the quicker they melt