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Title (Primary) Use of a weather generator for simulating climate change effects on ecosystems: a case study on Lake Constance
Author Schlabing, D.; Frassl, M.A.; Eder, M.M.; Rinke, K.; Bárdossy, A.;
Journal Environmental Modelling & Software
Year 2014
Department SEEFO;
Volume 61
Language englisch;
POF III (all) T31; T32;
Keywords Weather generator; Vector-autoregressive process; Lake model; Plankton phenology; Climate variability; DYRESM-CAEDYM
UFZ wide themes RU2;
Abstract

We present a new vector-autoregressive weather generator developed to generate meteorological time series for climate impact studies on ecosystems.

As an example, the weather generator was applied in combination with a hydrodynamic-ecological lake model (DYRESM-CAEDYM). The effects of a warmer and more variable climate on hydrodynamics and phytoplankton in large monomictic lakes were analysed.

The weather generator reproduced dependency structures of measured meteorological data. Variability was altered at a time scale similar to lengths of synoptic disturbances, resulting in longer than day-to-day fluctuation changes.

Sensitivity of spring bloom development towards a warmer climate, increased climate variability and a combination of both was addressed. For this purpose, 500 meteorological time series per scenario were generated as input for the lake model. We found that onset and maximum of phytoplankton spring bloom are sensitive towards spring weather conditions and that an increase in variability favours early as well as late blooms.

ID 15268
Persistent UFZ Identifier http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=15268
Schlabing, D., Frassl, M.A., Eder, M.M., Rinke, K., Bárdossy, A. (2014):
Use of a weather generator for simulating climate change effects on ecosystems: a case study on Lake Constance
Environ. Modell. Softw. 61 , 326 - 338