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在 MOSAiC 期间，从机载激光扫描获得的海冰表面数字高程模型。

Digital elevation models of the sea-ice surface from airborne laser scanning during MOSAiC.

机构信息

Cooperative Institute for Climate, Ocean and Ecosystem Studies, University of Washington, Seattle, WA, 98105, USA.

Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, 27570, Germany.

出版信息

Sci Data. 2023 Oct 20;10(1):729. doi: 10.1038/s41597-023-02565-6.

DOI:10.1038/s41597-023-02565-6
PMID:37863900
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10589245/
Abstract

Airborne laser scanners (ALS) are used to map the sea-ice surface at sub-meter resolution. We conducted 64 flights over the Arctic sea ice between September 2019 and September 2020 during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition to measure sea-ice surface elevation. The flights ranged from repeated, local-scale 5 × 5 km floe grid surveys to regional-scale transects more than 100 km long. We provide data at different processing levels: geolocated elevation point clouds and gridded segments of elevation and freeboard with a spatial resolution of 0.5 m. The latter product is corrected for atmospheric backscatter, sea-ice drift, and offset in elevation due to degraded INS/GNSS solutions > 85° N. For floe grid surveys, all data are combined to merged two-dimensional elevation maps. Other provided parameters include laser reflectance and echo width. The presented data offer a unique possibility to study the temporal evolution, spatial distribution, and variability of the snow and sea-ice surface and their properties in addition to validating satellite products.

摘要

机载激光扫描仪（ALS）用于以亚米级分辨率测绘海冰表面。我们在 2019 年 9 月至 2020 年 9 月 MOSAiC 考察期间，在北极海冰上进行了 64 次飞行，以测量海冰表面高程。这些飞行范围从重复的局部尺度 5×5km 浮冰块网格调查到超过 100km 长的区域尺度横剖面。我们提供了不同处理水平的数据：地理定位的高程点云和网格化的高程和浮冰段，空间分辨率为 0.5m。该产品经过大气后向散射、海冰漂移和由于 INS/GNSS 解算在 85°N 以上降级导致的高程偏移的校正。对于浮冰块网格调查，所有数据都被组合到合并的二维高程图中。其他提供的参数包括激光反射率和回波宽度。这些数据提供了一个独特的机会，可以研究雪和海冰表面及其在时间上的演变、空间分布和变化，以及验证卫星产品。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/ab6c6de8fcd5/41597_2023_2565_Fig12_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/e70f7c613f46/41597_2023_2565_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/797f876b9d6d/41597_2023_2565_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/8214890ae839/41597_2023_2565_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/01dbaeecc65b/41597_2023_2565_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/ab6c6de8fcd5/41597_2023_2565_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/5a7aab4b32e5/41597_2023_2565_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/054d3daecc76/41597_2023_2565_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/a8d68ba5286a/41597_2023_2565_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/4c1371fd147d/41597_2023_2565_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/523cc0cdddca/41597_2023_2565_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/6fb73e97ca53/41597_2023_2565_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/e5c58883e11a/41597_2023_2565_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/e70f7c613f46/41597_2023_2565_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/797f876b9d6d/41597_2023_2565_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/8214890ae839/41597_2023_2565_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/01dbaeecc65b/41597_2023_2565_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/56e8/10589245/ab6c6de8fcd5/41597_2023_2565_Fig12_HTML.jpg

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