amundson wisely used huskies to pull his sleds across the ice.ive. the south pole. what you might not know or be prepared for is the south pole is high, like 9,000 feet above sea level, and it's cold, real cold, but you knew that. you feel the altitude. today, the base at south pole has the feel of a space station, a warm comfortable bubble in the middle of, well, the great void. it can be incredibly harsh out there with winds reaching as high as 50 knots and temperatures regularly dropping below negative 50 degrees fahrenheit. about 200 scientists and staff work here during the summer season. chef bryan denham is responsible for keeping them all fed and happy. he's been coming here for about five seasons, wintering over for three of those. again, one makes a lot with a little. what do you think the likely common thread is between all of the people who choose to come to this place? >> stuart: everybody's got a spirit of adventure here. it's pretty cool because you think oh i've done some really cool things, and then you talk to someone else and y

jason amundson calculate how much melted ice is flowing into the ocean. >> when the glaciers are actually in retreat, the one thing they do is they contrtribe to sea level rise, but they also affect atmospheric circulation patterns, which propagates downstream. it affects other things. the changes in the amount of freshwater runoff into the ocean, which will affect the ocean properties, which could afaffect the marinine life. >> > the globalal sea levelel ig to rise, and it will rise by varying amounts depending on where you are in the world, and the contribubution from glacie is like to o beignififint. >> diggining sn pitits s beenen useful for almost 60 years on the juno icefield, but when these snow pits are paired with new ground-breaking technologies, the science becomes even more successfsful. salvatore candela is using a powerful ground-penetratating radar,r, or gpr as it's known, o gett information from the vastt areas between snow pipits using the pits thememselves as a refeference for hihis readings. >> the diggingng of pits and usg ground-penetrtrating radar realy tieses well t

craig amundson melissa rose barnes master sgt. max beilke kris romeo bishundat carrie blagburn lt. col. canfield d. boone donna bowen allen boyle christopher lee burford daniel martin caballero sgt. first class jose calderon angelene c. carter sharon carver john j. chada rosa maria chapa julian cooper lt. cmdr. eric allen cranford ada davis capt. gerald francis deconto lt. col. jerry don dickerson johnnie doctor capt. robert edward dolan cmdr. william howard donovan cmdr. patrick s. dunn edward thomas earhart lt. cmdr. robert randolph elseth jamie lynn fallon amelia v. fields gerald p. fisher matthew michael flocco sandra n. foster capt. lawrence daniel getzfred cortz ghee brenda c. gibson ron golinski diane m. hale-mckinzy carolyn b. halmon sheila hein ronald john hemenway maj. wallace cole hogan jimmie ira holley angela houtz brady k. howell peggie hurt lt. col. stephen neil hyland robert j. hymel sgt. maj. lacey b. ivory lt. col. dennis m. johnson judith jones brenda kegler lt. michael scott lamana david w. laychak jennifer lewis. and her husband. samantha lightbourn-allen maj.