Scopus记录号: 2-s2.0-85062782595
论文题名: Fram Strait sea ice export affected by thinning: comparing high-resolution simulations and observations
作者: Zamani B. ; Krumpen T. ; Smedsrud L.H. ; Gerdes R.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2019
语种: 英语
英文关键词: Arctic sea ice mass balance
; Fram Strait
; High-resolution model
; Ocean-sea ice model
; Sea ice area export
; Sea ice export trends
; Sea ice volume export
英文摘要: Variability and trends of Fram Strait sea ice area and volume exports are examined for the period of 1990–2010. Simulations from a high-resolution version of the MPIOM model (STORM project) reproduce area and volume export well when compared with NSIDC and ICESat satellite data and in-situ ice thickness observations. The fluxes derived from ice thickness and drift satellite products vary considerably, indicating a high uncertainty in these estimates which we mostly assign to the drift observations. The model captures the observed average seasonal cycles and interannual variability of ice export. The simulated mean annual sea ice area export is 860 × 10 3 km 2 a − 1 (1990–2010), and the correlation with the NSIDC-based area fluxes is r = 0.67. The simulated mean annual volume export is 3.3 × 10 3 km 3 a − 1 (1990–2010), close to the ICESat/ULS values, with a correlation of r = 0.58. The simulated monthly area export has a significant positive trend of + 10% per decade, explained by wind forcing. The major contribution to the robust trend in area export between June and September. Fram Strait ice volume export variability is mainly controlled by ice drift with a dominant role of the Transpolar Drift and, to a lesser extent thickness variability. The area export increase reflects increasing ice-drift speed, but is balanced with a reduced thickness over time when it comes to volume export, giving no significant trend in volume export. The spatial variability of ice drift indicates that the export influences a large area upstream in the Trans-Polar Drift stream, and that high volume export events lead to a thinner thickness there. The central Arctic is well connected drift-wise to the Fram Strait via the Transpolar Drift while for thickness, the region north of Greenland is dominated and controlled by the Fram Strait ice export. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature. 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122503
Appears in Collections: 气候变化事实与影响
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作者单位: Alfred Wegener Institute for Polar and Marine research (AWI), Bremerhaven, Germany; Jacobs University, Bremen, Germany; Geophysical Institute and Bjerknes Centre for Climate Research, University of Bergen, Bergen, Norway; University Centre in Svalbard, Longyearbyen, Svalbard and Jan Mayen
Recommended Citation:
Zamani B.,Krumpen T.,Smedsrud L.H.,et al. Fram Strait sea ice export affected by thinning: comparing high-resolution simulations and observations[J]. Climate Dynamics,2019-01-01