TY  - STD
AU  - GRISELIN M., M. A. R. L. I. N. Ch
PY  - 2009//
TI  - Recent climate change observed in Svalbard since fourty years in Ny Alesund (79°N)
N2  - MOCA 09, Our warming Planet, Joint assembly, symposium J01 Observations of High Latitude Climate Change, Montréal, 19-29 juillet 2009abstractIn the framework of the IPY program “Hydro-Sensor-FLOWS”, focused on the study of the response of the Loven East glacier to climate conditions, we analysed the longest meteorological data time-series available for this area (1969-2008), recorded at Ny Alesund (79°N).The mean annual temperature increased of 2°C in 40 years and the annual amount of precipitation increased of 74 mm with a gradient of +2 mm/year. But what is hidden behind these global data?The annual air temperature of the last 10 years (1998-2008) is always above the long-term mean (1969-1999). We demonstrate that the increase of the air temperature is more linked to an increase of the temperature during the cold period than to an increase of the temperature during the summer time. Moreover, the analysis of daily data shows that the positive trend of the air temperature is related by an increase of the number of warm events during the cold periods, that is the most specific change in the present-day climate, compared to the beginning of the observed period, i.e the 70s.As a conclusion, the global annual variation of the air temperature and precipitation does not give an accurate idea of the climate evolution, as well as the response of the glacier, deduced from the front position, does not give any precise information of the past climate change. This will show how a survey at a local scale with a very small time step can highlight the actual interaction between climate change and glacier response.
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=5877), last updated on Fri, 20 Nov 2009 09:12:17 +0100
ID  - GRISELINM.2009
ER  -