Climate Change in California. Part 2

natural forces did the land we know it's insanity over millions of years some of the planet's most dramatic scenery lasers cut into granite snow fed rivers and the glaciers have retreated but snow fields continue to shape this year but as summer day than wanton don't at the us geological survey leads me of corporate hands on the east side of the port of portland full bloom experts are split over fed by slowly melting snow fields many creeds fear russia and verbal and summer water meadows and sustain amphibians and other animals through the dry season there's a lot of uncertainty about what will happen with human induced climate change for one of the surest projections his loss of snow climate researchers say by the middle of this century to sierra's snow pack could decrease by roughly a third beyond then wants and dont says that could be a big problem with original

water early summer allows that for a fortune to sustain themselves that they'll shift to rein in the rail goes downhill attack would be much less water available as we climb through nine to ten to eleven thousand feet we discuss global warming projections for western forests larger fires the possibility of new diseases moving up the mountains as they warm stress on animals vietnam the only a fraud is primarily a water boiler so it will be effected dramatically from drug production then the forest falls away and we emerged onto a pass between rocky peaks twisted vegetation stunted by wind and cold clings to thin soil reclining under a vast blue sky snow fields bask in the sun i never told them all it's real of clark's nutcracker supporters

in some way which we depend on each other in that nine seats to store them winter the bird catches them around planting some see otherwise would have remained locked in cones have eaten by squirrels then walked and dont says global warming threatens both the season this year white bark pine very sensitive to summer hot so it can continue to be too warm over long extended period time they too he squeezed off the top point he says they live on the tops of mountains are among the most at risk from warming scientists are already documenting changes although it's unclear how much of current warming can be attributed to human activities instead of natural variability jim pattern of uc berkeley discovered some sierra mammals have moved their ranges up slopes more than a thousand feet in the last

century it's a harbinger of how nature will respond to human induced warming like your little cousin of the rabbit the american pie is losing ground scientists think it's because it can't tolerate warmer summers if the pike is really responding directly to increasing temperatures that enable it going to get pushed off the popular crowd here you go up above fourteen thousand feet there's no other place to go you're going to hear are you know boyd i think throughout most of the range in the lower forty eight also at risk says gene patents alpine to be the fed is limited to hear it doesn't occur outside of your family down and recorded king in your ear until want it to go on if he could take forever at the top a park or pass the wind carries through gaps in the granite beyond then wanting don't have the us geological survey rest of the

turquoise and they are professional a glacial foreign relations picture eventually still here they reluctantly we turn to jon want and don tells me so is climate has shifted cooler warmer drier over hundreds of thousands of years so i ask him why worry about global warming i don't to be responsible for these ecosystems evolve over time without our intervention and they're going to continue what we saw and make it or storm descended past the chattering nutcrackers down into the rustling pines along the edges of meadows and a cross creeks that steady flowing waters from above from his sanity national party bosses that feel at nine point three kpcc