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glims.org

global land ice measurements from space (glims) - monitoring the world's changing glaciers. glims (global land ice measurements from space) is an initiative designed to monitor the world's glaciers primarily using data from the aster (advanced spaceborne thermal emission and reflection radiometer) instrument aboard the eos terra spacecraft, launched in december, 1999.

the-cryosphere-discuss.net

Abstract. Non-invasive monitoring of avalanche formation and release processes, through the use of Acoustic Emission (AE) technique, has been a research challenge since long time. In present investigation AE technique is implemented to monitor the avalanche formation and release processes through a case study of a natural avalanche event reported in Great Himalaya. The specialized AE sensor-arrestor arrays, established over the avalanche starting zone, in conjunction to a high speed multichannel AE acquisition system have successfully recorded the avalanche event passed through the course of instability development followed by release of avalanche. A new method is devised to compute the AE based instability index, and same has been applied to quantify the instability levels of a snowpack. The prominent AE parameters and instability indices are analyzed for different window scales with respect to different AE sensors. The effect of nivological and meteorological conditions and pit analyses collected during the avalanche formation process is also discussed. The critical instability was triggered possibly due to the excessive loading (during snowfall) of an unstable snowpack consisting of persistent weak layers which led to the avalanche release. An abnormal and abrupt increase in the AE activity was observed prior to the avalanche release. The increasing trends in instability indices have shown a good correlation to the avalanche formation and a sharp jump in instability index is attributed to a particular transition occurring across two different instability states of the snowpack. Thus, five conceptual states of snowpack are identified for instability evolution corresponding to four different transitions during avalanche formation and release processes.

antarctica.ac.uk

British Antarctic Survey (BAS), an institute of the Natural Environment Research Council (UKRI-NERC)*, delivers and enables world-leading interdisciplinary research in the Polar Regions.

npolar.no

Norsk Polarinstitutts bibliotek inviterer til litterært påfyll frå kalde strøk! Vi har mange skattar i vår store polarsamling – og vi vil utfordre ulike gjestar til å fortelje om ei polarbok. Boka kan vere ny eller gamal, kort eller lang, men ho må handle om Arktis eller Antarktis.

glaciology.de

im mittelpunkt des vorhabens stehen alpine gletscher und ihre rolle im kontinentalen wasserkreislauf, als klimaindikatoren und ihre wechselwirkung mit der festen erde. neben langjährigen, intensiven forschungsarbeiten am vernagtferner, dem "hausgletscher" in den ötztaler alpen, werden untersuchungen in verschiedenen gletscherregionen, z. b. in norwegen, im pamir und im karakorum und in island durchgeführt. dabei kommen neben klassischen feldmessungen aus erdmessung und glaziologie auch moderne satellitenverfahren zum einsatz. auf basis der so gewonnenen daten werden die interaktionen der gletscher mit ihrer umwelt in abhängigkeit der klimatischen veränderungen modelliert. parallel werden geodätische arbeiten zur geodynamik und zu referenzsystemen als basis für vielfältige weitere untersuchungen in den geowissenschaften durchgeführt.

vaw.ethz.ch

Ihre Daten sind für uns Vertrauenssache. Es ist uns ein Anliegen, dass die ETH Zürich nur Personendaten erhebt, die zur Erfüllung ihrer Aufgaben unbedingt erforderlich sind (Datensparsamkeit).

polarresearch.net

polar research; arctic research; antarctica; biology; ecology; geology; oceanography; glaciology