The nodal cycle
Sea level rise will become a huge challenge for coastal societies around the world. We need good data, we need good models, and we need to understand all changes.
Nov 17, 2024Time Series Analysis
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Sea level, the moon, and Frankenstein
Jens Morten Hansen (JMH) and co-authors have recently published a study where they use sine-regression to fit 5 oscillations plus a linear trend to a 160-year sea level record from waters near Denmark …
Sep 25, 2015 -
Haar wavelet analysis of climatic time series
In order to extract the intrinsic information of climatic time series from background red noise, in this paper, we will first give an analytic formula on the distribution of Haar wavelet power spectra …
Jun 20, 2014 -
Volcanic impact on sea level and the global water cycle
We examined the impact of the 5 & 9 most major volcanic eruptions on global sea level. We construct a record of sea level and its uncertainty since 1854. From this we isolate the volcanic …
Mar 24, 2014 -
Projected Atlantic hurricane surge threat from rising temperatures
Detection and attribution of past changes in cyclone activity is hampered by biased cyclone records due to changes in observational capabilities. Here we relate a new homogeneous record of Atlantic …
Dec 24, 2013 -
Gulf Stream and ENSO Increase the Temperature Sensitivity of Atlantic Tropical Cyclones
Controversy exists over the role of the recent rise in sea surface temperatures (SST) and the frequency of tropical cyclones or hurricanes. Here, 135 yr of observational records are used to …
Jun 7, 2013 -
Persistence Matters: Significance of paleoclimatic reconstruction statistics
Proxy data forms natural time series used to lengthen instrumental climatic records, and may contain a significant portion of autocorrelation. Increased serial correlation limits the number of …
Dec 24, 2011 -
Reconstructing sea level from paleo and projected temperatures 200 to 2100 AD
Sea level rise of roughly a meter over the next century.
Dec 24, 2010 -
Recent global sea level acceleration started over 200 years ago?
This paper has turned out to be quite popular. It made the frontpage of GRL, got an editorial highlight, and reached the top downloads of the AGU journals when it was published.
Dec 24, 2008 -
Wavelet Coherence FAQ
I have written a new FAQ for the Crosswavelet and Wavelet Coherence matlab package. At the moment the questions answered are:
Mar 18, 2008 -
Neglible Solar Forcing of Climate at Multi-year and Decadal Periods.
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 …
Mar 4, 2008 -
My PhD thesis.
Grinsted (2006) Advanced methods of glaciological modelling and time series analysis, Doctoral dissertation, Arctic Centre Reports 47. pdf
Dec 24, 2006