Investigation of sea level trends and the effect of the north atlantic oscillation (NAO) on the black sea and the eastern mediterranean sea |
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| Authors: | Email author" target="_blank">Aysegul?Ozgenc AksoyEmail author |
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| Institution: | 1.College of Applied Meteorology, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Agricultural Meteorology,Nanjing University of Information Science and Technology,Nanjing,China;2.Department of Forest and Natural Resources Management, State University of New York,College of Environmental Science and Forestry,Syracuse,USA;3.School of Environmental Science and Engineering, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control,Nanjing University of Information Science and Technology,Nanjing,China;4.Forestry College of Nanjing Forestry University, Key Laboratory of soil and water conservation and Ecological Restoration,Nanjing Forestry University,Nanjing,China |
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| Abstract: | Understanding variations in precipitation from a variety of aspects is important for the utilization of water resources. Based on daily precipitation records at 98 meteorological stations in Sichuan province, southwestern China, the spatial and temporal changes in wet/dry spells were investigated by using 14 precipitation indices. The Mann–Kendall trend test is used to detect trends in the index series. Results suggest that the decrease of precipitation in central and eastern Sichuan was significant in terms of decreasing tendencies of wet spell indices. However, the decreasing trend of dry spell indices suggested an increase in precipitation in western Sichuan province. A higher risk of droughts can be expected in autumn and wet spell indices in winter and spring are increasing, implying obvious seasonality and seasonal shifts of change in precipitation within this province. Wet/dry spells with short duration were accounted for a large proportion of spells in Sichuan. The occurrence and fractional contribution of short-duration wet spells were increasing. The same trend was found in dry spells with short and moderate duration in Sichuan |
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