Long term variability of Swedish river discharge as represented by EC-Earth in the past and future climates
(2012) In TVVR12/5013 VVR820 20121Division of Water Resources Engineering
- Abstract
- The aim of this study is to identify changes in pattern of long-term variability of seasonal discharge for the period 1851-2100 among four selected Swedish rivers based on output data from EC-Earth climate model.
In order to achieve the main goal and be able to analyze and compare changes in patterns of variability of water discharge for the past time period 1851-2005 and future time-period 2006-2100, discharge peaks should be represented as oscillations of frequency. This was done by means Fourier and wavelet analysis. Since data, obtained from the climate model are large-scale atmospheric variables with different units and magnitudes, they are incomparable with small-scale river discharge data. As consequence data need to be... (More) - The aim of this study is to identify changes in pattern of long-term variability of seasonal discharge for the period 1851-2100 among four selected Swedish rivers based on output data from EC-Earth climate model.
In order to achieve the main goal and be able to analyze and compare changes in patterns of variability of water discharge for the past time period 1851-2005 and future time-period 2006-2100, discharge peaks should be represented as oscillations of frequency. This was done by means Fourier and wavelet analysis. Since data, obtained from the climate model are large-scale atmospheric variables with different units and magnitudes, they are incomparable with small-scale river discharge data. As consequence data need to be downscaled and standardized, it was done by using Singular Value Decomposition (SVD).
Results imply that natural variability becomes weaker in the future and is affected by radiative forcing. According to the model results, long-term variability is expected to increase in the future, whereas short-term variability tends to disappear and becomes weaker with higher RCP. For the past period model simulations showed that long-term variability tends to decrease in frequency towards lower latitudes, whereas frequency of short-term variability is increasing in the South compared to the North of Sweden. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/3046963
- author
- Corral Díaz, David LU and Siergieieva, Olena LU
- supervisor
- organization
- course
- VVR820 20121
- year
- 2012
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- Long term variability, climate change, downscaling, global climate model, Sweden, Fourier, wavelet
- publication/series
- TVVR12/5013
- report number
- 12/5013
- ISSN
- 1101-9824
- language
- English
- additional info
- Examiner: magnus Persson
- id
- 3046963
- date added to LUP
- 2012-09-06 11:16:47
- date last changed
- 2019-03-27 16:12:29
@misc{3046963,
abstract = {{The aim of this study is to identify changes in pattern of long-term variability of seasonal discharge for the period 1851-2100 among four selected Swedish rivers based on output data from EC-Earth climate model.
In order to achieve the main goal and be able to analyze and compare changes in patterns of variability of water discharge for the past time period 1851-2005 and future time-period 2006-2100, discharge peaks should be represented as oscillations of frequency. This was done by means Fourier and wavelet analysis. Since data, obtained from the climate model are large-scale atmospheric variables with different units and magnitudes, they are incomparable with small-scale river discharge data. As consequence data need to be downscaled and standardized, it was done by using Singular Value Decomposition (SVD).
Results imply that natural variability becomes weaker in the future and is affected by radiative forcing. According to the model results, long-term variability is expected to increase in the future, whereas short-term variability tends to disappear and becomes weaker with higher RCP. For the past period model simulations showed that long-term variability tends to decrease in frequency towards lower latitudes, whereas frequency of short-term variability is increasing in the South compared to the North of Sweden.}},
author = {{Corral Díaz, David and Siergieieva, Olena}},
issn = {{1101-9824}},
language = {{eng}},
note = {{Student Paper}},
series = {{TVVR12/5013}},
title = {{Long term variability of Swedish river discharge as represented by EC-Earth in the past and future climates}},
year = {{2012}},
}