Modeling Caspian Sea water level oscillations under different scenarios of increasing atmospheric carbon dioxide concentrations

Journal of Environmental Health Science Engineering

Stefan Grab¹  Masumeh Moghbel³  GholamReza Roshan² 

[1] School of Geography, Archaeology and Environmental Studies, University of the Witwatersrand, Johannesburg, South Africa;Department of Geography, Golestan University, Gorgan, Iran;Faculty of Geography, Department of Physical Geography, University of Tehran, Tehran, Iran

关键词: Caspian sea water oscillations;    Carbon dioxide;    General circulation model;    Global warming;   

Others  :  821453
DOI  :  10.1186/1735-2746-9-24

 received in 2012-12-04, accepted in 2012-12-04,  发布年份 2012

【 摘 要 】

The rapid rise of Caspian Sea water level (about 2.25 meters since 1978) has caused much concern to all five surrounding countries, primarily because flooding has destroyed or damaged buildings and other engineering structures, roads, beaches and farm lands in the coastal zone. Given that climate, and more specifically climate change, is a primary factor influencing oscillations in Caspian Sea water levels, the effect of different climate change scenarios on future Caspian Sea levels was simulated. Variations in environmental parameters such as temperature, precipitation, evaporation, atmospheric carbon dioxide and water level oscillations of the Caspian sea and surrounding regions, are considered for both past (1951-2006) and future (2025-2100) time frames. The output of the UKHADGEM general circulation model and five alternative scenarios including A1CAI, BIASF, BIMES WRE450 and WRE750 were extracted using the MAGICC SCENGEN Model software (version 5.3). The results suggest that the mean temperature of the Caspian Sea region (Bandar-E-Anzali monitoring site) has increased by ca. 0.17°C per decade under the impacts of atmospheric carbon dioxide changes (r=0.21). The Caspian Sea water level has increased by ca. +36cm per decade (r=0.82) between the years 1951-2006. Mean results from all modeled scenarios indicate that the temperature will increase by ca. 3.64°C and precipitation will decrease by ca. 10% (182 mm) over the Caspian Sea, whilst in the Volga river basin, temperatures are projected to increase by ca. 4.78°C and precipitation increase by ca. 12% (58 mm) by the year 2100. Finally, statistical modeling of the Caspian Sea water levels project future water level increases of between 86 cm and 163 cm by the years 2075 and 2100, respectively.

【 授权许可】

   
2012 Roshan et al.; licensee BioMed Central Ltd.

【 图 表 】

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