全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
中外文文献  中文文献  外文文献
作者:... R. Ricker , S. Hendricks , V. Helm
来源:[J].The Cryosphere(IF 3.77), 2016, Vol.10 (4), pp.1415-1425DOAJ
摘要:Knowledge about Antarctic sea-ice volume and its changes over the pastdecades has been sparse due to the lack of systematic sea-ice thicknessmeasurements in this remote area. Recently, first attempts have been made todevelop a sea-ice thickness product over the Southern Ocea...
作者:V. Helm , S. Sun
来源:[J].The Cryosphere(IF 3.77), 2017, Vol.11, pp.2675-2690DOAJ
摘要:Ice shelves control the dynamic mass loss of ice sheets through buttressing and their integrity depends on the spatial variability of their basal mass balance (BMB), i.e. the difference between refreezing and melting. Here, we present an improved technique – based on satelli...
作者:V. Helm , A. Humbert , H. Miller
来源:[J].The Cryosphere(IF 3.77), 2014, Vol.8 (4), pp.1539-1559DOAJ
摘要:This study focuses on the present-day surface elevation of the Greenland andAntarctic ice sheets. Based on 3 years of CryoSat-2 data acquisitionwe derived new elevation models (DEMs) as well as elevation change maps andvolume change estimates for both ice sheets. Here we pre...
作者:V. Helm , D. Mair ...
来源:[J].The Cryosphere(IF 3.77), 2010, Vol.4 (4), pp.467DOAJ
摘要:We present estimates of accumulation rate along a 200 km transect ranging in elevation from 2750 to 3150 m in the dry snow zone on the western slope of the Greenland Ice Sheet. An airborne radar altimeter is used to estimate the thickness of annual internal layers and, in co...
作者:... K. Khvorostovsky , V. Helm , S. Sandven
来源:[J].The Cryosphere(IF 3.77), 2013, Vol.7 (4), pp.1315-1324DOAJ
摘要:Sea ice thickness is one of the most sensitive variables in the Arctic climate system. In order to quantify changes in sea ice thickness, CryoSat-2 was launched in 2010 carrying a Ku-band radar altimeter (SIRAL) designed to measure sea ice freeboard with a few centimeters accurac...
作者:V. Helm , H. Skourup
来源:[J].The Cryosphere(IF 3.77), 2014, Vol.8 (4), pp.1607-1622DOAJ
摘要:In the context of quantifying Arctic ice-volume decrease at global scale, theCryoSat-2 satellite was launched in 2010 and is equipped with the K uband synthetic aperture radaraltimeter SIRAL (Synthetic Aperture Interferometric RadarAltimeter), which we use to deri...
作者:V. Helm , D. Mair ...
来源:[J].The Cryosphere(IF 3.77), 2010, Vol.4 (4), pp.467-474DOAJ
摘要:We present estimates of accumulation rate along a 200 km transect ranging in elevation from 2750 to 3150 m in the dry snow zone on the western slope of the Greenland Ice Sheet. An airborne radar altimeter is used to estimate the thickness of annual internal layers and, in co...
作者:V. Helm , D. Mair ...
来源:[J].The Cryosphere Discussions, 2010, Vol.4 (2), pp.767DOAJ
摘要:We present estimates of accumulation rate along a 200 km transect ranging in elevation from 2750 to 3165 m in the dry snow zone on the western slope of the Greenland Ice Sheet. An airborne radar altimeter is used to estimate the thickness of annual internal layers and, in co...
作者:V. Helm , A. Humbert , H. Miller
来源:[J].The Cryosphere, 2014, Vol.8 (4), pp.1539-1559Copernicus Publications
摘要:This study focuses on the present-day surface elevation of the Greenland andAntarctic ice sheets. Based on 3 years of CryoSat-2 data acquisitionwe derived new elevation models (DEMs) as well as elevation change maps andvolume change estimates for both ice sheets. Here we pre...
作者:V. Helm , H. Skourup
来源:[J].The Cryosphere, 2014, Vol.8 (4), pp.1607-1622Copernicus Publications
摘要:In the context of quantifying Arctic ice-volume decrease at global scale, theCryoSat-2 satellite was launched in 2010 and is equipped with the K uband synthetic aperture radaraltimeter SIRAL (Synthetic Aperture Interferometric RadarAltimeter), which we use to deri...

我们正在为您处理中,这可能需要一些时间,请稍等。

资源合作:cnki.scholar@cnki.net, +86-10-82896619   意见反馈:scholar@cnki.net

×