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DOI | 10.1029/2020GL088293 |
Surface Melting Drives Fluctuations in Airborne Radar Penetration in West Central Greenland | |
Inè; s Otosaka; Andrew Shepherd; Tâ; nia G. D. Casal; Alex Coccia; Malcolm Davidson; Alessandro Di Bella; Xavier Fettweis; René; Forsberg; Veit Helm; Anna E. Hogg; Sine Hvidegaard; Adriano Lemos; Karlus Macedo; Peter Kuipers Munneke; Tommaso Parrinello; Sebastian B. Simonsen; Henriette Skourup; Louise Sandberg Sø; rensen | |
2020-08-21 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | Greenland Ice Sheet surface melting has increased since the 1990s, affecting the rheology and scattering properties of the near‐surface firn. We combine firn cores and modelled firn densities with seven years of CryoVEx airborne Ku‐band (13.5 GHz) radar profiles to quantify the impact of melting on microwave radar penetration in West‐Central Greenland. Although annual layers are present in the Ku‐band radar profiles to depths up to 15 m below the ice sheet surface, fluctuations in summer melting strongly affect the degree of radar penetration. The extreme melting in 2012, for example, caused an abrupt 6.2 ± 2.4 m decrease in Ku‐band radar penetration. Nevertheless, retracking the radar echoes mitigates this effect, producing surface heights that agree to within 13.9 cm of coincident airborne laser measurements. We also examine two years of Ka‐band (34.5 GHz) airborne radar data and show that the degree of penetration is half that of coincident Ku‐band. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/291084 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Inè,s Otosaka,Andrew Shepherd,et al. Surface Melting Drives Fluctuations in Airborne Radar Penetration in West Central Greenland[J]. Geophysical Research Letters,2020. |
APA | Inè.,s Otosaka.,Andrew Shepherd.,Tâ.,nia G. D. Casal.,...&rensen.(2020).Surface Melting Drives Fluctuations in Airborne Radar Penetration in West Central Greenland.Geophysical Research Letters. |
MLA | Inè,et al."Surface Melting Drives Fluctuations in Airborne Radar Penetration in West Central Greenland".Geophysical Research Letters (2020). |
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