Description: Das Projekt "Climate sensitivity of glacier mass balance: the effect of topographic barriers" wird vom Umweltbundesamt gefördert und von Universität Innsbruck, Institut für Meteorologie und Geophysik durchgeführt. Objective: To identify and model the most important factors leading to mesoscale variability of the mass balance field on ice caps. A comprehensive study of the effect of topographic barriers on glacier mass balance and its sensitivity to climate change will be carried out by field measurements and modelling work. As targets have been selected Vatnajkull (Iceland) and the Antarctic Peninsula. General Information: The field work has two major components which are mass balance measurements (by stake measurements and snow pits on Vatnajvkull, the major ice cap on Iceland, characteristic length scale 100 km, and by snow-level sensors and shallow cores in the Antarctic Peninsula) and detailed meteorological measurements including the full energy balance programme. Albedo measurements of the ice cape from satellite (AVHRR, Landsat images) for a complete melt season will complete the programme. An attempt will be made to improve passive microwave satellite retrievals of annual accumulation rates by incorporating the output of snow models into the retrieval and by trying to develop a radiative transfer model for microwave radiation within the snow pack. Satellite data will be compared with point measurements from the ground stations and be used to validate albedo patterns generated by the mass balance model. An energy balance model will be constructed for the entire ice cap, calibrated with results from the field work to generate glacier mass balance and to study its sensitivity to climate change. The UK operational GCM will be used in limited area mode to investigate the effects of the topography on the Antarctic Peninsula on the distribution of precipitation and temperature. Model data will be verified against passive microwave brightness temperatures from SSM/I. Prime Contractor: Utrecht University, Institute for Marine and Atmospheric Research; Utrecht; Netherland.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Innsbruck ? Mikrowellen ? Antarktische Halbinsel ? Kalibrierung ? Meteorologie ? Radar ? Satellitenbild ? Satellitendaten ? Sensor ? Strahlungshaushalt ? Temperaturverteilung ? Island ? Albedo ? Gletscher ? Messprogramm ? Radiometrie ? Satellit ? Schmelzwasser ? Topographie ? Globales Klimamodell ? Polargebiet ? Prüfverfahren ? Energiebilanz ? Reflexion ? Feldstudie ? Geoakkumulation ? Geophysik ? Schnee ? Stoffbilanz ? Strahlungsmodell ? Studie ? Klimamodell ? Messdaten ? Vergleichsanalyse ? Verbreitungsgebiet ? Modellierung ? Globale Veränderung ? Bilanz ? Messverfahren ? Klimafolgen ? Bohrkern ? Daten ? Niederschlag ? Erdoberfläche ? Standortbedingung ? Klimawandel ? Probenahme ? Globale Aspekte ? Klimasensitivität ? Massenbezogenheit ? Nachweisbarkeit ? Meteorologischer faktor ? Ablagerung ?
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1996-02-01 - 1998-07-31
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