Long-Term Changes in Temperature and Radiation at the Arctic Station Ny-Ålesund (79°N, 12°E)
At the Franco-German AWIPEV Arctic research base in Ny-Ålesund (79°N, 12°E), Svalbard, surface radiation measurements have been operated since 1992 in the frame of the Baseline Surface Radiation Network (BSRN). The data are, complemented with surface meteorology measurements since 1993, contributing...
| Main Authors: | , , |
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| Format: | Conference Object |
| Language: | unknown |
| Published: |
2014
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| Subjects: | |
| Online Access: | https://epic.awi.de/id/eprint/35285/ https://epic.awi.de/id/eprint/35285/1/DPG_Poster_2014.pdf https://hdl.handle.net/10013/epic.43290 https://hdl.handle.net/10013/epic.43290.d001 |
| Summary: | At the Franco-German AWIPEV Arctic research base in Ny-Ålesund (79°N, 12°E), Svalbard, surface radiation measurements have been operated since 1992 in the frame of the Baseline Surface Radiation Network (BSRN). The data are, complemented with surface meteorology measurements since 1993, contributing to the study of climate change in the Arctic with focus on alpine/marine landscape. Over the last 20 years, changes both in surface radiation and temperature have been observed in Ny-Ålesund. An increase of the annual mean temperature of +1.3 ± 0.7 K per decade indicate a substantial warming of the Ny-Ålesund environment, accompanied by an increase of the annual mean radiation budget of +4.9 ± 2.9 Wm-2 per decade. Separating the annual radiation budget to its different contributions it turns out that by far the largest changes are observed in the increasing long-wave radiation during the winter season. In fact, also the temperature increase is largest during the winter season, with +3.1 ± 2.4 K per decade. In the recent warmer winters, precipitation has often occurred in the form of rain rather than snow. Furthermore, changes in reflective solar radiation indicate an earlier onset of the snow melt by 1 week compared to 20 years ago. |
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