Geocentric Changes of the Mean Sea Level of the Baltic Sea from Altimeter and Tide Gauge Data

A. Lyszkowicz, A. Bernatowicz
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引用次数: 2

Abstract

The global mean sea level is one of the most important indicators of climate changes. Until recently, changes in ocean level were determined from tide gauge observations, currently from satellite altimetry. The main objective of this work is to analyse the available data from the satellite altimetry in order to determine the trend in the Baltic sea level changes. We used these data to investigate regional trend at selected eight tide gauge stations. In the first step sea level anomaly were extracted from the multi mission global product available at CMEMS and next analysed using Ferret and Hector software. Furthermore absolute mean sea level computed from tide gauge data and GNSS observations was taken from the SONEL web page. The results were compared and this comparison shows some differences in both method of the order of 1 mm/year and significant difference of the order 2.4 mm/year at station Helsinki.
从高度计和验潮仪资料看波罗的海平均海平面的地心变化
全球平均海平面是气候变化最重要的指标之一。直到最近,海平面的变化都是通过潮汐计观测来确定的,目前是通过卫星测高来确定的。这项工作的主要目的是分析来自卫星测高的现有数据,以便确定波罗的海海平面变化的趋势。我们利用这些数据在选定的8个测潮站调查了区域趋势。首先从CMEMS提供的多任务全球产品中提取海平面异常,然后使用Ferret和Hector软件进行分析。此外,根据潮汐计数据和GNSS观测数据计算的绝对平均海平面来自SONEL网页。结果表明,在赫尔辛基站,两种方法在1 mm/年数量级上存在一定差异,在2.4 mm/年数量级上存在显著差异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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