Observation and modelisation of an ice-cloud over Greenland
نویسندگان
چکیده
Analysis of a jet stream induced gravity wave associated with an observed ice cloud over Greenland S. Buss, A. Hertzog, C. Hostettler, T. P. Bui, D. Lüthi, and H. Wernli Institute for Atmospheric and Climate Science, Zürich, Switzerland Laboratoire de Météorologie Dynamique, Palaiseau, France NASA, Langley Research Center, Hampton VA, USA NASA Ames Research Center, Moffett Field CA, USA Received: 23 September 2003 – Accepted: 13 November 2003 – Published: 18 November 2003 Correspondence to: S. Buss ([email protected])
منابع مشابه
Analysis of a jet stream induced gravity wave associated with an observed stratospheric ice cloud over Greenland
A polar stratospheric ice cloud (PSC type II) was observed by airborne lidar above Greenland on 14 January 2000. It was the unique observation of an ice cloud over Greenland during the SOLVE/THESEO 2000 campaign. Mesoscale simulations with the hydrostatic HRM model are presented which, in contrast to global analyses, are capable to produce a vertically propagating gravity wave that induces the ...
متن کاملModelling and observations of the katabatic flow dynamics over Greenland
The katabatic wind system over the Greenland ice sheet is studied using simulations of the hydrostatic Norwegian Limited Area Model (NORLAM) and measurements of an instrumented aircraft. The structure and the dynamics of the katabatic wind over the ice sheet are investigated for a case study of the aircraft-based experiment KABEG (Katabatic wind and boundary layer front experiment around Greenl...
متن کاملClouds enhance Greenland ice sheet meltwater runoff
The Greenland ice sheet has become one of the main contributors to global sea level rise, predominantly through increased meltwater runoff. The main drivers of Greenland ice sheet runoff, however, remain poorly understood. Here we show that clouds enhance meltwater runoff by about one-third relative to clear skies, using a unique combination of active satellite observations, climate model data ...
متن کاملThe deglaciation and neoglaciation of Upernavik Isstrøm, Greenland
a r t i c l e i n f o We constrain the history of the Greenland Ice Sheet margin during the Holocene at Upernavik Isstrøm, a major ice stream in northwestern Greenland. Radiocarbon-dated sediment sequences from proglacial-threshold lakes adjacent to the present ice margin constrain deglaciation of the sites to older than 9.6 ± 0.1 ka. This age of deglaciation is confirmed with 10 Be ages of 9.9...
متن کاملDecreasing cloud cover drives the recent mass loss on the Greenland Ice Sheet
The Greenland Ice Sheet (GrIS) has been losing mass at an accelerating rate since the mid-1990s. This has been due to both increased ice discharge into the ocean and melting at the surface, with the latter being the dominant contribution. This change in state has been attributed to rising temperatures and a decrease in surface albedo. We show, using satellite data and climate model output, that...
متن کامل