- document
-
Riva, R.E.M. (author), Frederikse, T. (author), King, A. Matt (author), Marzeion, Ben (author), van den Broeke, Michiel R. (author)Melting glaciers, ice caps and ice sheets have made an important contribution to sea-level rise through the last century. Self-attraction and loading effects driven by shrinking ice masses cause a spatially varying redistribution of ocean waters that affects reconstructions of past sea level from sparse observations. We model the solid-earth...journal article 2017
- document
-
Riddell, Anna R. (author), King, A. Matt (author), Watson, Christopher S. (author), Sun, Y. (author), Riva, R.E.M. (author), Rietbroek, Roelof (author)Uncertainty in the geocenter position and its subsequent motion affects positioning estimates on the surface of the Earth and downstream products such as site velocities, particularly the vertical component. The current version of the International Terrestrial Reference Frame, ITRF2014, derives its origin as the long-term averaged center of...journal article 2017
- document
-
Richter, Kristin (author), Marzeion, Ben (author), Riva, R.E.M. (author)We investigate the spatial scales that are necessary to detect an externally forced signal in regional sea level within a selected fixed time period. Detection on a regional scale is challenging due to the increasing magnitude of unforced variability in dynamic sea level on progressingly smaller spatial scales. Using unforced control...journal article 2017
- document
-
Hashemi Farahani, H. (author), Ditmar, P.G. (author), Miragaia Gomes Inacio, P. (author), Engels, Olga (author), Gunter, B.C. (author), Klees, R. (author), Guo, X. (author), Guo, Jing (author), Sun, Y. (author), Liu, Xianglin (author), Zhao, Qile (author), Riva, R.E.M. (author)We present a high resolution model of the linear trend in the Earth’s mass variations based on DMT-2 (Delft Mass Transport model, release 2). DMT-2 was produced primarily from K-Band Ranging (KBR) data of the Gravity Recovery And Climate Experiment (GRACE). It comprises a time series of monthly solutions complete to spherical harmonic degree 120...journal article 2017
- document
-
Simon, K.M. (author), Riva, R.E.M. (author), Kleinherenbrink, M. (author), Tangdamrongsub, N. (author)Geodetic measurements of vertical land motion and gravity change are incorporated into an a priori model of present-day glacial isostatic adjustment (GIA) in North America via least-squares adjustment. The result is an updated GIA model wherein the final predicted signal is informed by both observational data, and prior knowledge (or...journal article 2017
- document
-
Sun, Y. (author), Riva, R.E.M. (author), Ditmar, P.G. (author)The focus of the study is optimizing the technique for estimating geocenter motion and variations in J2 by combining data from the Gravity Recovery and Climate Experiment (GRACE) satellite mission with output from an Ocean Bottom Pressure model and a Glacial Isostatic Adjustment (GIA) model. First, we conduct an end-to-end numerical simulation...journal article 2016
- document
-
Frederikse, T. (author), Riva, R.E.M. (author), Kleinherenbrink, M. (author), Wada, Yoshihide (author), van den Broeke, Michiel (author), Marion, Ben (author)Long-term trends and decadal variability of sea level in the North Sea and along the Norwegian coast have been studied over the period 1958–2014. We model the spatially nonuniform sea level and solid earth response to large-scale ice melt and terrestrial water storage changes. GPS observations, corrected for the solid earth deformation, are used...journal article 2016
- document
-
Engels, Olga (author), Gunter, B.C. (author), Riva, R.E.M. (author), Klees, R. (author), Rose-Koerner, Lutz (author)There has been considerable research in the literature focused on computing and forecasting sea-level changes in terms of constant trends or rates. The Antarctic ice sheet is one of the main contributors to sea-level change with highly uncertain rates of glacial thinning and accumulation. Geodetic observing systems such as the Gravity Recovery...journal article 2016
- document
-
Estimating decadal variability in sea level from tide gauge records: An application to the North SeaFrederikse, T. (author), Riva, R.E.M. (author), Slobbe, D.C. (author), Broerse, D.B.T. (author), Verlaan, M. (author)One of the primary observational data sets of sea level is represented by the tide gauge record. We propose a new method to estimate variability on decadal time scales from tide gauge data by using a state space formulation, which couples the direct observations to a predefined state space model by using a Kalman filter. The model consists of...journal article 2016
- document
-
Kleinherenbrink, M. (author), Riva, R.E.M. (author), Sun, Y. (author). In this study, for the first time, an attempt is made to close the sea level budget on a sub-basin scale in terms of trend and amplitude of the annual cycle. We also compare the residual time series after removing the trend, the semiannual and the annual signals. To obtain errors for altimetry and Argo, full variance–covariance matrices are...journal article 2016
- document
-
Dangendorf, S. (author), Marcos, M. (author), Muller, A (author), Zorita, E. (author), Riva, R.E.M. (author), Berk, K. (author), Jensen, J (author)While there is scientific consensus that global and local mean sea level (GMSL and LMSL) has risen since the late nineteenth century, the relative contribution of natural and anthropogenic forcing remains unclear. Here we provide a probabilistic upper range of long-term persistent natural GMSL/LMSL variability (P=0.99), which in turn, determines...journal article 2015
- document
-
Postseismic GRACE and GPS observations indicate a rheology contrast above and below the Sumatra slabBroerse, D.B.T. (author), Riva, R.E.M. (author), Simons, W.J.F. (author), Govers, R. (author), Vermeersen, L.L.A. (author)More than 7 years of observations of postseismic relaxation after the 2004 Sumatra-Andaman earthquake provide an improving view on the deformation in the wide vicinity of the 2004 rupture. We include both Gravity Recovery and Climate Experiment (GRACE) gravity field data that show a large postseismic signal over the rupture area and GPS...journal article 2015
- document
-
Grinsted, A. (author), Jevrejeva, S. (author), Riva, R.E.M. (author), Dahl-Jensen, D. (author)Sea level rise poses a significant threat to coastal communities, infrastructure, and ecosystems. Sea level rise is not uniform globally but is affected by a range of regional factors. In this study, we calculate regional projections of 21st century sea level rise in northern Europe, focusing on the British Isles, the Baltic Sea, and the North...journal article 2015
- document
- Frederikse, T. (author), Riva, R.E.M. (author), Slobbe, D.C. (author), Broerse, D.B.T. (author) journal article 2015
- document
-
Wolstencroft, M. (author), King, M.A. (author), Whitehouse, P.L. (author), Bentley, M.J. (author), Nield, G.A. (author), King, E.C. (author), McMillan, M. (author), Shepherd, A. (author), Barletta, V. (author), Bordoni, A. (author), Riva, R.E.M. (author), Didova, O. (author), Gunter, B.C. (author)The measurement of ongoing ice-mass loss and associated melt water contribution to sea-level change from regions such as West Antarctica is dependent on a combination of remote sensing methods. A key method, the measurement of changes in Earth's gravity via the GRACE satellite mission, requires a potentially large correction to account for the...journal article 2015
- document
- Gunter, B.C. (author), Engels, Olga (author), Riva, R.E.M. (author), Meister, R. (author), Muir, Alan (author), King, M.A. (author), van den Broeke, M.R. (author), Hashemi Farahani, H. (author), Ditmar, P.G. (author) abstract 2015
- document
-
Wouters, B. (author), Bonin, J.A. (author), Chambers, D.P. (author), Riva, R.E.M. (author), Sasgen, I. (author), Wahr, J. (author)Continuous observations of temporal variations in the Earth's gravity field have recently become available at an unprecedented resolution of a few hundreds of kilometers. The gravity field is a product of the Earth's mass distribution, and these data—provided by the satellites of the Gravity Recovery And Climate Experiment (GRACE)—can be used to...journal article 2014
- document
- Hashemifarahani, H. (author), Ditmar, P.G. (author), Inacio, P.M.G. (author), Klees, R. (author), Guo, J. (author), Guo, X. (author), Liu, X. (author), Zhao, Q. (author), Didova, O. (author), Ran, J. (author), Sun, Y. (author), Tangdamrongsub, N. (author), Gunter, B.C. (author), Riva, R.E.M. (author), Steele-Dunne, S.C. (author) conference paper 2014
- document
-
Broerse, D.B.T. (author), Riva, R.E.M. (author), Vermeersen, B. (author)During megathrust earthquakes, great ruptures are accompanied by large scale mass redistribution inside the solid Earth and by ocean mass redistribution due to bathymetry changes. These large scale mass displacements can be detected using the monthly gravity maps of the GRACE satellite mission. In recent years it has become increasingly common...journal article 2014
- document
-
Richter, K. (author), Riva, R.E.M. (author), Drange, H. (author)We investigate the effect of self-attraction and loading (SAL) induced by the projected accumulation of sea water on shallow continental shelf areas. Using output from a climate model, we compute 21st century changes in regional steric sea surface height and find that steric changes are largest over the deep ocean and relatively small on the...journal article 2013