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科学

科学

两周一更
科学

科学

2024/02/23更新
科学

科学

2022/03/14更新

2021/07/26

Eyes on Earth Episode 55 - Urban Heat Islands of New York

Urban heat islands occur in areas containing more impervious surfaces and fewer natural environments. The day and night surface temperature is higher in urban heat islands than in surrounding areas. During heat waves, this can lead to greater numbers of heat-related illnesses and deaths. Landsat satellites collect data on surface temperature and vegetative change that can help cities mitigate the heat stresses for residents, especially in a warming climate. For this episode of Eyes on Earth, we hear about how a mapping project involving Landsat data helped the New York City Council identify urban heat islands.

2021/07/26

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17 分钟
2020/01/27

Eyes on Earth Episode 15 – Burn Severity Mapping

Scientists at EROS have spent years refining their approach to mapping burn severity using remotely-sensed data from satellites like Landsat, but Landsat comes with limitations. Landsat data cannot see the vegetation below a thick tree canopy, for example. In this episode, we learn about a project in South Dakota’s Black Hills that seeks to leverage 3D data gathered using Unmanned Aircraft Systems (UAS) to improve burn mapping and help land managers.

2020/01/27

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19 分钟
2024/10/15

Eyes on Earth Episode 125 – The LANDFIRE Program at 20

In this episode of Eyes on Earth, we talk about the Landscape Fire and Resource Management Planning Tools (LANDFIRE) project, which is commemorating its 20th year of providing geospatial data to support natural resource management and wildland fire planning. LANDFIRE brings a lot of data together, over 30 data products, into one place. The publicly available, consistent data maps disturbance to the landscape and vegetation condition, which can be useful to virtually any application that deals with what’s occurring on the landscape. LANDFIRE has now been doing this for 20 years, and we talk with some of the people who have been working on LANDFIRE that entire time.

2024/10/15

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30 分钟
2024/09/30

Eyes on Earth Episode 124 – Mapping Fires in Utah

In this episode of Eyes on Earth, we talk to forest ecologist Jim Lutz about the effort to map fires in Utah. Fire research in the West is dominated by the study of large fires, but the forests in Utah are different. Utah typically does not have a lot of large fires as other western states do. So to better understand the differences that the specific Utah vegetation types have in their response to fire, a fire atlas for the state was developed. This data helps inform land managers about the implications for forest management and for prescribed fire planning.

2024/09/30

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21 分钟
2022/07/25

Eyes on Earth Episode 78 - Landsat 50 Lookback

Government officials and scientists had high hopes for Landsat when the first experimental satellite launched July 23, 1972. Those hopes were soon realized when imagery came back depicting features never before seen. Since then, an archive of imagery surpassing 10 million scenes has amassed at EROS, collected from eight different Landsat satellites. Agencies, scientists, researchers, and data analysts use Landsat in a variety of ways to learn more about our planet, preserve its resources, and benefit its people. On this episode of Eyes on Earth, we spotlight how several guests from past Eyes on Earth episodes value the Landsat imagery and archive, from forests and fires to lakes and cities.

2022/07/25

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19 分钟
2024/07/15

Eyes on Earth Episode 120 – Mapping the California Coastline

In this episode of Eyes on Earth, we begin a series on Landsat’s usefulness in coastal studies. First, we talk with Sean Vitousek, a USGS research oceanographer, about changes to beaches in California and how he is using Landsat and other data to create models that can predict how the coastline may change in the future because of sea level rise and coastal erosion. Landsat’s global reach stretches back decades—that, along with its free availability, can help in planning for the prevention and adaptation to future hazards along the coast. See how Landsat complements other data and ground truth studies, and how machine learning plays a part in this study as well.

2024/07/15

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20 分钟
2025/08/29

Eyes on Earth Episode 137 – Landsat Takes Yellowstone’s Temperature

The Yellowstone National Park area has more than 10,000 thermal features. And while Old Faithful is a pretty predictable geyser, some thermal features can change quite a bit. New ones can even pop up! Remote sensing provides a tool for monitoring them—especially the thermal infrared sensors (TIRS) on Landsat 8 and Landsat 9 satellites. In this episode of Eyes on Earth, R. Greg Vaughan, the remote sensing lead for the Yellowstone Volcano Observatory, describes what causes the thermal features and how he uses Landsat and other remote sensing data to track their locations and estimate their temperatures. Then Terry Sohl, the Integrated Science and Applications Branch chief at USGS EROS, describes a couple of other important uses of Landsat thermal data.

2025/08/29

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26 分钟
2021/09/07

Eyes on Earth Episode 58 - Satellites and Cloud Computing

Satellite imagery is everywhere. We see it on TV news and weather coverage, in our Twitter and Facebook feeds, and on our phones’ mapping apps. The data behind that imagery is nothing like a screenshot, though. It’s comprised of tiny packets of data, broken down from huge files and digitally manipulated to resemble the surface of the Earth, a swirling storm system or a map of urban growth. Cloud computing resources can make it easier to work with huge datasets that cover long periods of time, which is why many remote sensing scientists are using it for their analyses. On this episode of Eyes on Earth, we hear from a scientist who used the cloud for a 150-year water use modeling project, and from a data scientist working to help train others to use cloud resources.

2021/09/07

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17 分钟
2023/11/05

Mudpot at Artists' Paintpots — Sounds of Yellowstone (ASMR, Sleep, Concentration)

Need time to concentrate or relax? Then listen to the natural sounds of a mudpot in Yellowstone National Park, Wyoming. This mudpot is located in the Artists' Paintpots area located in Yellowstone National Park, Wyoming. If you're looking for the video, check out Mudpot at Artists' Paintpots on the USGS YouTube channel.

2023/11/05

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2022/05/13

Eyes on Earth Episode 74 – A Satellite Cross Calibration Mission

When the first Landsat satellite launched 50 years ago, it was the only game in town in terms of civilian land remote sensing. In the years that followed, a host of satellites have launched to serve similar purposes. But that data doesn't always play well together. Subtle differences between the measurements taken by satellites make it difficult to do apples-to-apples comparisons of land change. On this episode of Eyes on Earth, we hear from the USGS partners working with partners in Australia to launch a satellite cross calibration mission that will offer a common reference post and serve as a sort of “translation tool” to help remote sensing scientists to use datasets together to study changes to the Earth’s surface.

2022/05/13

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19 分钟

At the USGS, we monitor, assess, map, and conduct targeted scientific research so that policymakers and the public have the understanding they need to address complex environmental, natural resource, and public safety issues.

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Eyes on Earth Episode 55 - Urban Heat Islands of New York

Eyes on Earth Episode 15 – Burn Severity Mapping

Eyes on Earth Episode 125 – The LANDFIRE Program at 20

Eyes on Earth Episode 124 – Mapping Fires in Utah

Eyes on Earth Episode 78 - Landsat 50 Lookback

Eyes on Earth Episode 120 – Mapping the California Coastline

Eyes on Earth Episode 137 – Landsat Takes Yellowstone’s Temperature

Eyes on Earth Episode 58 - Satellites and Cloud Computing

Mudpot at Artists' Paintpots — Sounds of Yellowstone (ASMR, Sleep, Concentration)

Eyes on Earth Episode 74 – A Satellite Cross Calibration Mission

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