Estimation of degree of sea ice ridging in the Bay of Bothnia based on geolocated photon heights from ICESat-2
We present a comparison of Ice, Cloud and land Elevation Satellite-2 (ICESat-2) geolocated photon heights and operational ice charts from the Finnish Ice Service in the Bay of Bothnia in spring 2019. We show that ICESat-2 (IS2) retrievals from ice areas with different ridging characteristics, more p...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:7fa9813896cc469e8f7e895b4a15a8e3 2023-05-15T18:17:23+02:00 Estimation of degree of sea ice ridging in the Bay of Bothnia based on geolocated photon heights from ICESat-2 R. M. Fredensborg Hansen E. Rinne S. L. Farrell H. Skourup 2021-06-01 https://doi.org/10.5194/tc-15-2511-2021 https://tc.copernicus.org/articles/15/2511/2021/tc-15-2511-2021.pdf https://doaj.org/article/7fa9813896cc469e8f7e895b4a15a8e3 en eng Copernicus Publications doi:10.5194/tc-15-2511-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/2511/2021/tc-15-2511-2021.pdf https://doaj.org/article/7fa9813896cc469e8f7e895b4a15a8e3 undefined The Cryosphere, Vol 15, Pp 2511-2529 (2021) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.5194/tc-15-2511-2021 2023-01-22T17:50:39Z We present a comparison of Ice, Cloud and land Elevation Satellite-2 (ICESat-2) geolocated photon heights and operational ice charts from the Finnish Ice Service in the Bay of Bothnia in spring 2019. We show that ICESat-2 (IS2) retrievals from ice areas with different ridging characteristics, more precisely the degree of ice ridging (DIR), differ significantly. DIR is a particularly useful parameter for ice navigators, as it provides information on how difficult it is to navigate through an area based on e.g. sail heights and distribution of sea ice ridges. DIR estimates are included in ice charts of the Baltic Sea and are based primarily on in situ observations from an active icebreaker fleet. We show that DIR may potentially be estimated from IS2. We also present a comparison of IS2 measurements and Sentinel-1 synthetic aperture radar frames, discussing several individual cases of IS2 photon elevation behaviour over Baltic sea ice. We suggest that IS2 data can be of benefit to international ice services, especially if a time-critical photon height product were to be made available. Furthermore, we show that the difference between highest and mean photon elevations (elevation anomalies) of IS2 correspond to expected ridge sail heights in our study area. Our study is one of the first steps in creating sea ice applications beyond the traditional goal of freeboard and thickness retrieval for IS2. Article in Journal/Newspaper Sea ice The Cryosphere Unknown The Cryosphere 15 6 2511 2529 |
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geo envir R. M. Fredensborg Hansen E. Rinne S. L. Farrell H. Skourup Estimation of degree of sea ice ridging in the Bay of Bothnia based on geolocated photon heights from ICESat-2 |
topic_facet |
geo envir |
description |
We present a comparison of Ice, Cloud and land Elevation Satellite-2 (ICESat-2) geolocated photon heights and operational ice charts from the Finnish Ice Service in the Bay of Bothnia in spring 2019. We show that ICESat-2 (IS2) retrievals from ice areas with different ridging characteristics, more precisely the degree of ice ridging (DIR), differ significantly. DIR is a particularly useful parameter for ice navigators, as it provides information on how difficult it is to navigate through an area based on e.g. sail heights and distribution of sea ice ridges. DIR estimates are included in ice charts of the Baltic Sea and are based primarily on in situ observations from an active icebreaker fleet. We show that DIR may potentially be estimated from IS2. We also present a comparison of IS2 measurements and Sentinel-1 synthetic aperture radar frames, discussing several individual cases of IS2 photon elevation behaviour over Baltic sea ice. We suggest that IS2 data can be of benefit to international ice services, especially if a time-critical photon height product were to be made available. Furthermore, we show that the difference between highest and mean photon elevations (elevation anomalies) of IS2 correspond to expected ridge sail heights in our study area. Our study is one of the first steps in creating sea ice applications beyond the traditional goal of freeboard and thickness retrieval for IS2. |
format |
Article in Journal/Newspaper |
author |
R. M. Fredensborg Hansen E. Rinne S. L. Farrell H. Skourup |
author_facet |
R. M. Fredensborg Hansen E. Rinne S. L. Farrell H. Skourup |
author_sort |
R. M. Fredensborg Hansen |
title |
Estimation of degree of sea ice ridging in the Bay of Bothnia based on geolocated photon heights from ICESat-2 |
title_short |
Estimation of degree of sea ice ridging in the Bay of Bothnia based on geolocated photon heights from ICESat-2 |
title_full |
Estimation of degree of sea ice ridging in the Bay of Bothnia based on geolocated photon heights from ICESat-2 |
title_fullStr |
Estimation of degree of sea ice ridging in the Bay of Bothnia based on geolocated photon heights from ICESat-2 |
title_full_unstemmed |
Estimation of degree of sea ice ridging in the Bay of Bothnia based on geolocated photon heights from ICESat-2 |
title_sort |
estimation of degree of sea ice ridging in the bay of bothnia based on geolocated photon heights from icesat-2 |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-2511-2021 https://tc.copernicus.org/articles/15/2511/2021/tc-15-2511-2021.pdf https://doaj.org/article/7fa9813896cc469e8f7e895b4a15a8e3 |
genre |
Sea ice The Cryosphere |
genre_facet |
Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 15, Pp 2511-2529 (2021) |
op_relation |
doi:10.5194/tc-15-2511-2021 1994-0416 1994-0424 https://tc.copernicus.org/articles/15/2511/2021/tc-15-2511-2021.pdf https://doaj.org/article/7fa9813896cc469e8f7e895b4a15a8e3 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-15-2511-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
6 |
container_start_page |
2511 |
op_container_end_page |
2529 |
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