Decadal Changes In Wave Climate And Sea Level
Regime: The Main Causes Of The Recent
Intensification Of Coastal Geomorphic Processes
Along The Coasts Of Western Estonia?
Author(s)
Ü. Suursaar & T. Kullas
Abstract
Strong erosion of accumulative shores and redistribution of matter has been
observed along the practically tideless west coast of Estonia during the last half
century. This indicates manifestations of climate change, such as increased
storminess and high sea level. The objective of the paper is to presents an
analysis of sea level data obtained from the Estonian tide gauges over the period
1842–2008 and to discuss the results of a hindcast simulation of wave conditions
in the fetch-limited nearshore location of West Estonia for the period 1966–
2006. After adjusting the historical sea level time series to take into account land
uplift, the series of mean sea level display an upward trend of between 1.5 and
2.7 mm/yr, and 4–11 mm/yr for annual maximum sea levels. The results for
wave climate show some quasi-periodic cycles, including a rise in mean wave
height in the 1970s and 1980s, and decrease since 1990. Although both the
average wind speed and the wave height show a decrease since 1990s, the annual
sea level maxima, as well as the wave maxima continue to increase. Major
coastal geomorphic changes seem to occur precisely as a combined result of such
relatively infrequent but extreme wintertime wavestorms and storm surges.
Keywords: sea level, wave hindcast, wave climate, trends, storm surges, climate
change, Baltic Sea.
Keywords
sea level, wave hindcast, wave climate, trends, storm surges, climatechange, Baltic Sea
Related Book
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