Changes in regional sea level trends and variability since 1807
Abstract
We use all available tide gauge records since 1807 to compose global and regional sea level reconstructions and analyse the evolution of sea level trends and changes in low/high frequency variability. Decadal sea level trends for 14 ocean basins show a lot of variability and divergent regional patterns; for example, strong rise since 1990s in Central Pacific and at the same time significant fall in North East Pacific. Linear trends for each region since 1960 suggest the fastest sea level rise near Antarctica coast (3.5 mm/yr) and North West Pacific region (3.3 mm/yr). We examine the changes in the spectral properties of tide gauge data in different regions by comparing pre-1950 and post 1950 periods of the 20th Century. Over the spectrum from biannual to bidecadal there is an increase in variance, which is most confidently seen in the 3.5 and 5.7 year period bands.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2011
- Bibcode:
- 2011AGUFM.G21B0805J
- Keywords:
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- 0429 BIOGEOSCIENCES / Climate dynamics;
- 1635 GLOBAL CHANGE / Oceans;
- 1637 GLOBAL CHANGE / Regional climate change;
- 1641 GLOBAL CHANGE / Sea level change