NASA Earth Observatory image by Wanmei Liang, using Landsat data from the U.S. This could lead to large-scale calving and hasten the glacier’s retreat. Some of this water is nearly as salty as the ocean, according to recent research, meaning that comparatively warm ocean water is making contact with the ice. Small patches of open water are visible here in a rusty red color. A comparison of satellite imagery over time has revealed a lagoon system forming along that barrier over the past few decades. As a result of this irregular flow, the moraines can fold, compress, and shear to form the characteristic textures seen on Malaspina.Īt the terminus, or end, of the glacier, a thin strip of land creates a barrier between the ice and the Gulf of Alaska. Glaciers in this area of Alaska periodically “surge” or lurch forward for one to several years. The zigzag pattern of the debris is caused by changes in the ice’s velocity. The dark blueish-purple lines on the ice are moraines-areas where soil, rock, and other debris have been scraped up by the glacier and deposited along its edges. Several other glaciers, such as the Agassiz, also fan out onto this plain and coalesce to form the larger Malaspina. Elias Mountains onto a broad coastal plain. Its main source of ice is the Seward Glacier, which spills out of the St. The data on the PurpleAir map is reported on an. The number they report is based on the one-hour average we collected over the past 60 minutes. Data reporting frequency Conversion rate of PM2.5 AQI Data Reporting Frequency The data from our sensors on AirNow’s map is reported once an hour. At approximately 1,680 square miles (4,350 square kilometers) in size, it is the world’s largest piedmont glacier and covers an area larger than the state of Rhode Island. The discrepancies between PurpleAir’s map and AirNow’s map are created and affected by a few things. The sprawling Malaspina Glacier-or Sít’ Tlein, Tlingit for “big glacier”-is located mostly within Wrangell-St. Create new Weather Underground sensor ID. To help citizen science, share your devices location and sensor readings with Weather Underground, an IBM business. In this configuration, watery features are displayed in reds, oranges, and yellows vegetation appears green and rock is shown in shades of blue. In addition to PurpleAir, send data and the sensors 'Map Location' to these 3rd party services: Data Processor 1. The coastal/aerosol, near infrared, and shortwave infrared bands are displayed here: a band combination of 1-5-7. This view of Malaspina Glacier on the southeastern coast of Alaska was captured by the OLI-2 (Operational Land Imager-2) on Landsat 9 on October 27, 2023. Your sensor’s WiFi may need to be reconfigured and/or power may need to be supplied to your sensor. Your sensor should now appear on the map as a gray oval icon,, indicating it is currently Offline and not reporting data. But in this false-color satellite image, the rippled ice of Alaska’s Malaspina Glacier appears more fiery than frosty. Map, find the panel on the top left side of the page. To human eyes, glacial ice typically looks white tinged with blue. Today’s story is the answer to the November 2023 puzzler.
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