Aslak Grinsted

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[1] We present a reconstruction of global sea level (GSL) since 1700 calculated from tide gauge records and analyse the evolution of global sea level acceleration during the past 300 years. We provide observational evidence that sea level acceleration up to the present has been about 0.01 mm/yr 2 and appears to have started at the end of the 18th century.(More)
Part of Special Issue " Nonlinear analysis of multivariate geoscientific data – advanced methods, theory and application " Abstract. Many scientists have made use of the wavelet method in analyzing time series, often using popular free software. However, at present there are no similar easy to use wavelet packages for analyzing two time series together. We(More)
[1] It has been proposed that solar cycle irradiance variations may affect the whole planet's climate via the stratosphere, the Quasi-Biennial Oscillation (QBO) and Arctic Oscillation (AO). We test this hypothesis by examining causal links between time series of sunspot number and indices of QBO, AO and ENSO activity. We use various methods: wavelet(More)
The North Greenland Ice Core Project (NGRIP) drill site was chosen in order to obtain a good Eemian record. At the present depth, 3001 meters, the Eemian interstadial has not yet been seen! Clearly the flow in this area is poorly understood and needs further investigation. After reviewing specific features of the bottom topography, it is believed that the(More)
We examine possible links between solar cycle irradiance variations the large atmospheric circulation systems that affect whole planet's climate. In particular we examine the putative mechanism of solar forcing mediated by changes in induced stratospheric conditions over the polar regions. We test this hypothesis by examining causal links between time(More)
Contemporary changes of the hydrological cycle over the contiguous United States, trends derived from in situ observations " 2008 " Recent global sea level acceleration started over 200 years ago? " An anomalous recent acceleration of global sea level rise " Journal of Climate, 22:5772-5781. 18 Global sea level rise is measured by satellite detection. NASA,(More)