DOI: 10.5194/tc-15-3101-2021
论文题名: Estimating instantaneous sea-ice dynamics from space using the bi-static radar measurements of Earth Explorer 10 candidate Harmony
作者: Kleinherenbrink M. ; Korosov A. ; Newman T. ; Theodosiou A. ; Komarov A.S. ; Li Y. ; Mulder G. ; Rampal P. ; Stroeve J. ; Lopez-Dekker P.
刊名: Cryosphere
ISSN: 19940416
出版年: 2021
卷: 15, 期: 7 起始页码: 3101
结束页码: 3118
语种: 英语
英文关键词: abundance estimation
; detection method
; estimation method
; measurement method
; radar
; sea ice
; Satellites
英文摘要: This article describes the observation techniques and suggests processing methods to estimate dynamical sea-ice parameters from data of the Earth Explorer 10 candidate Harmony. The two Harmony satellites will fly in a reconfigurable formation with Sentinel-1D. Both will be equipped with a multi-angle thermal infrared sensor and a passive radar receiver, which receives the reflected Sentinel-1D signals using two antennas. During the lifetime of the mission, two different formations will be flown. In the stereo formation, the Harmony satellites will fly approximately 300km in front and behind Sentinel-1, which allows for the estimation of instantaneous sea-ice drift vectors. We demonstrate that the addition of instantaneous sea-ice drift estimates on top of the daily integrated values from feature tracking have benefits in terms of interpretation, sampling and resolution. The wide-swath instantaneous drift observations of Harmony also help to put high-temporal-resolution instantaneous buoy observations into a spatial context. Additionally, it allows for the extraction of deformation parameters, such as shear and divergence. As a result, Harmony's data will help to improve sea-ice statistics and parametrizations to constrain sea-ice models. In the cross-track interferometry (XTI) mode, Harmony's satellites will fly in close formation with an XTI baseline to be able to estimate surface elevations. This will allow for improved estimates of sea-ice volume and also enables the retrieval of full, two-dimensional swell-wave spectra in sea-ice-covered regions without any gaps. In stereo formation, the line-of-sight diversity allows the inference of swell properties in both directions using traditional velocity bunching approaches. In XTI mode, Harmony's phase differences are only sensitive to the ground-range direction swell. To fully recover two-dimensional swell-wave spectra, a synergy between XTI height spectra and intensity spectra is required. If selected, the Harmony mission will be launched in 2028. © 2021 Marcel Kleinherenbrink et al. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164728
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Geoscience and Remote Sensing, Delft University of Technology, Delft, Netherlands; Nansen Environmental and Remote Sensing Center, Bergen, Norway; Centre for Polar Observation and Modelling, University College London, London, United Kingdom; Data Assimilation and Satellite Meteorology Research Section, Environment and Climate Change Canada, Ottawa, Canada; Institut des Géosciences de l'Environnement, CNRS, Grenoble, France
Recommended Citation:
Kleinherenbrink M.,Korosov A.,Newman T.,et al. Estimating instantaneous sea-ice dynamics from space using the bi-static radar measurements of Earth Explorer 10 candidate Harmony[J]. Cryosphere,2021-01-01,15(7)