WEBVTT FILE 1 00:00:00.867 --> 00:00:03.503 Climate change is not only impacting the size 2 00:00:03.503 --> 00:00:05.538 and intensity of wildfires, 3 00:00:05.538 --> 00:00:07.607 but also their frequency in some regions. 4 00:00:08.008 --> 00:00:12.679 NASA has over 22 years of daily fire data to track wildfire trends. 5 00:00:12.979 --> 00:00:16.816 This is important to get a sense of how fire regimes, the historical 6 00:00:16.816 --> 00:00:20.320 frequency of wildfires in a region, are changing over time. 7 00:00:20.720 --> 00:00:25.525 Understanding an ecosystem’s fire regime is important, because in many instances 8 00:00:25.825 --> 00:00:29.963 wildfire is essential to maintain a mixture of younger and older vegetation. 9 00:00:30.397 --> 00:00:34.567 However, when fires occur too frequently or with increased severity, 10 00:00:34.567 --> 00:00:37.670 it can have devastating effects - like destroying habitat, 11 00:00:38.004 --> 00:00:41.741 changing soil chemistry, and clogging waterways, 12 00:00:41.741 --> 00:00:46.046 not to mention releasing greenhouse gases like CO2 and aerosols into the atmosphere. 13 00:00:47.647 --> 00:00:51.885 NASA can study wildfires’ impact on the landscape by measuring burn scars, 14 00:00:52.118 --> 00:00:55.121 as well as tracking vegetation loss and rate of regrowth. 15 00:00:55.655 --> 00:00:58.892 Having an accurate assessment of a landscape post-fire is a key 16 00:00:58.892 --> 00:01:01.928 part of understanding how ecosystems recover over time. 17 00:01:02.662 --> 00:01:03.663 NASA's ability 18 00:01:03.663 --> 00:01:07.434 to not only track wildfires, but also the conditions that lead to them 19 00:01:07.767 --> 00:01:10.770 is essential to our ability to mitigate their impacts. 20 00:01:11.271 --> 00:01:14.107 We're working with land managers and those on the front lines 21 00:01:14.107 --> 00:01:18.178 to give them the tools, including near real-time data, to help them 22 00:01:18.178 --> 00:01:21.748 make decisions to minimize the risks and plan for the future.