DOI: 10.5194/tc-15-2511-2021
论文题名: Estimation of degree of sea ice ridging in the Bay of Bothnia based on geolocated photon heights from ICESat-2
作者: Fredensborg Hansen R.M. ; Rinne E. ; Farrell S.L. ; Skourup H.
刊名: Cryosphere
ISSN: 19940416
出版年: 2021
卷: 15, 期: 6 起始页码: 2511
结束页码: 2529
语种: 英语
英文关键词: elevation
; estimation method
; ice thickness
; ICESat
; in situ measurement
; navigation
; sea ice
; Sentinel
; Atlantic Ocean
; Baltic Sea
; Baltic Sea
; Bothnian Bay
; Gulf of Bothnia
英文摘要: 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. © 2021 Renee´ Mie Fredensborg Hansen et al. © 2021 Copernicus. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164687
Appears in Collections: 气候变化与战略
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作者单位: Marine Research, Finnish Meteorological Institute, Erik Palme´nin aukio 1, Helsinki, 00560, Finland; Geodesy and Earth Observation, DTU Space, Elektrovej Building 328, Kongens Lyngby, 2800, Denmark; Geographical Sciences, University of Maryland, 2181 LeFrak hall, College Park, MD 20740, United States
Recommended Citation:
Fredensborg Hansen R.M.,Rinne E.,Farrell S.L.,et al. Estimation of degree of sea ice ridging in the Bay of Bothnia based on geolocated photon heights from ICESat-2[J]. Cryosphere,2021-01-01,15(6)