Modelling experiments on air-snow-ice interactions over Kilpisjárvi, a lake in northern Finland


Contact
Tido.Semmler [ at ] awi.de

Abstract

The evolution of snow and ice thicknesses and temperature in an Arctic lake was investigated using two models: a high-resolution, time-dependent model (HIGHTSI) and a quasi-steady two-layer model on top of a lake model (FLake). In situ observations and a Numerical Weather Prediction model (THRLAM) were used for the forcing data. HIRLAM forecasts, after orography correction, were comparable with the in situ data. Both lake-ice models predicted the ice thickness (accuracy 5 cm), surface temperature (accuracy 2-3 °C in winter, better in spring), and ice-breakup date (accuracy better than five days) well. HIGHTSI was better for ice thickness and ice-breakup date, while FLake gave better freezing date. Snow thickness outcome was worse, in particular for the melting season. Surface temperature was highly sensitive to air temperature, stratification and albedo, and the largest errors (positively biased) resulted in strongly stable conditions. © 2013.



Item Type
Article
Authors
Divisions
Primary Division
Programs
Primary Topic
Peer revision
ISI/Scopus peer-reviewed
Publication Status
Published
Eprint ID
33988
Cite as
Yang, Y. , Cheng, B. , Kourzeneva, E. , Semmler, T. , Rontu, L. , Lepparänta, M. , Shirasawa, K. and Li, Z. (2013): Modelling experiments on air-snow-ice interactions over Kilpisjárvi, a lake in northern Finland , Boreal Environment Research, 18 (5), pp. 341-358 .


Download
[thumbnail of BER.pdf]
Preview
PDF
BER.pdf

Download (1MB) | Preview
Cite this document as:

Share

Research Platforms
N/A

Campaigns
N/A


Actions
Edit Item Edit Item