Transcripts of Gail_LS_recap_ipod_sm

Gail: Actually the snow right now is not abnormal right now. What we're seeing over the past couple of years is that snow can vary from month to month and over the past few winters, yeah, we've seen a lot of snow, but this year, there's not much snow, but it's not by far the least amount of snow that we've had. 2006 had less snow, and as we would recall in 2010 we had quite a bit of snow. So it's really not abnormal; it's just the global cycle working together. There's lots of impacts for not having enough snow. Snow is quite an important part of the water cycle. When snow falls it lands on snowpacks, and it's stays there. It's like a battery and it holds the energy of that snow it holds that water. So that when it melts out in the spring and the summer, we can use that for water resources. If we get less snow, that means that it melts earlier and also there's an issue with if it melts, it means that the Earth, which is typically reflective when there's snow cover; it's like a mirror, it allows it to absorb more heat. So we really want to have as much snow as we can for our normal cycles. Yeah, there were a couple factors that NASA researchers have recently uncovered. One of th big things for the Snowmageddon in 2010 is that we were in an El Nino year, and what that means is that there's a lot of moisture from the Pacific Ocean was uplifted and brought over the U.S. And what happened there, then it's deposited in the southeast U.S. came up the east coast. And then what we had was another factor, which was called the North Atlantic Oscillation, and in 2010 it was persistently negative. And really what that means is that there was a high pressure system over the polar regions that was pushing cold air down. So the interacting moisture for the Pacific Ocean with the cold air from the Arctic, what happens then is we get snow, and we got a lot of snow in 2010. There's many reasons to study snow from space. Sure, you can go in your backyard or use your radar to measure it from space. But over the oceans there's no way to measure the snow. When you measure snow from space you can get uniform measurements that can be applied globally and also can be used in models for better forecasting for weather and for better forecasting of the climate change and how we are going to predict climate change. NASA is doing some great things right now to understand winter storm mechanics. We have a field campaign going on right now which is in the January time period of 2012. We've got an aircraft called the DC-8, which many of you might have flown on, and I was actually on last week. And this aircraft is flying over the tops of the snow clouds over southern Ontario. And with it we're also measuring some other information with other spiralling aircraft, and we've put all this information together to get a three-dimensional structure of the snow. We're going to use that for Global Precipitation Measurement, which is a satellite that's going to be launched in 2014. And this satellite is going to provide us everything from the heavy tropical rain you might see in hurricanes all the way through the snow. And the information we're getting right now is going to help improve those models and to help improve our forecasting in the future. [beep, beep...]