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  • CU Sea Level Research Group | University of Colorado
    Service for Mean Sea Level PSMSL Radar Altimeter Database RADS USF Grace Ocean Mass UT CSR GRACE Since 1993 measurements from the TOPEX and Jason series of satellite radar altimeters have allowed estimates of global mean sea level These measurements are continuously monitored against a network of tide gauges When seasonal variations are subtracted they allow estimation of the global mean sea level rate As new data models and corrections become available we continuously revise these estimates about every two months to improve their quality 2015 rel3 Global Mean Sea Level Time Series seasonal signals removed Edited 2015 07 23 Share Data Raw data ASCII PDF EPS Similar plots Global Mean Sea Level Time Se ries seasonal signals retained Release Notes 2015 Release 3 2015 07 23 Added Jason 2 OSTM GDR cycles 246 252 Instrument Drift Monitoring To cite these plots or data please use Nerem R S D Chambers C Choe and G T Mitchum Estimating Mean Sea Level Change from the TOPEX and Jason Altimeter Missions Marine Geodesy 33 no 1 supp 1 2010 435 2015 rel3 GMSL and Multivariate ENSO Index Edited 2015 07 23 Share Discussion The Multivariate ENSO Index MEI is the unrotated first principal component of six observables measured over the tropical Pacific see NOAA ESRL MEI Wolter Timlin 1993 1998 To compare the global mean sea level to the MEI time series we removed the mean linear trend and seasonal signals from the 60 day smoothed global mean sea level estimates and normalized each time series by its standard deviation The normalized values plotted above show a strong correlation between the global mean sea level and the MEI with the global mean sea level often lagging changes in the MEI CU Sea Level Blog Correction New GMSL release and Jason 2 Switch

    Original URL path: http://sealevel.colorado.edu/ (2015-10-07)
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  • Regional Sea Level Time Series | CU Sea Level Research Group
    GIA and why do you correct for it Can I subscribe to the mean sea level estimates What is the format of the dates in the GMSL time series All FAQs Sea Level Links AVISO CLS Radar Altimetry Tutorial CSIRO GFZ GRACE Global Sea Level Observing System GLOSS JPL GRACE Tellus JPL Ocean Surface Topography LEGOS CTOH NASA EO World of Change NASA Global Climate Change NOAA Satellite Altimetry Permanent Service for Mean Sea Level PSMSL Radar Altimeter Database RADS USF Grace Ocean Mass UT CSR GRACE Regional Sea Level Time Series Edited 2014 05 23 Share Inverted barometer applied GIA NOT corrected Seasonal signal included Data Sets Northern Hemisphere sl Northern Hemisphere Southern Hemisphere sl Southern Hemisphere Pacific Ocean sl Pacific Ocean Atlantic Ocean sl Atlantic Ocean Indian Ocean sl Indian Ocean Adriatic Sea sl Adriatic Sea Andaman Sea sl Andaman Sea Arabian Sea sl Arabian Sea Baltic Sea sl Baltic Sea Bay of Bengal sl Bay of Bengal Bering Sea sl Bering Sea Carribean Sea sl Carribean Sea Gulf of Alaska sl Gulf of Alaska Gulf of Mexico sl Gulf of Mexico Indonesian Throughflow sl Indonesian Throughflow Mediterranean Sea sl Mediterranean Sea Sea of Japan East Sea sl Japan East Sea South China Sea sl South China Sea Yellow Sea sl Yellow Sea Maldives sl Maldives CU Sea Level Blog Correction New GMSL release and Jason 2 Switch to Side B Platform Module Senate Committee Hearing on Impacts of Rising Sea Levels on Domestic Infrastructures NASA mission takes stock of Earth s melting land ice more Our Publications Uncovering an anthropogenic sea level rise signal in the Pacific Ocean Effect of the processing methodology on satellite altimetry based global mean sea level rise over the Jason 1 operating period Australia s unique influence on global sea level in

    Original URL path: http://sealevel.colorado.edu/content/regional-sea-level-time-series (2015-10-07)
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  • Map of Sea Level Trends | CU Sea Level Research Group
    GIA and why do you correct for it Can I subscribe to the mean sea level estimates What is the format of the dates in the GMSL time series All FAQs Sea Level Links AVISO CLS Radar Altimetry Tutorial CSIRO GFZ GRACE Global Sea Level Observing System GLOSS JPL GRACE Tellus JPL Ocean Surface Topography LEGOS CTOH NASA EO World of Change NASA Global Climate Change NOAA Satellite Altimetry Permanent Service for Mean Sea Level PSMSL Radar Altimeter Database RADS USF Grace Ocean Mass UT CSR GRACE Map of Sea Level Trends Edited 2015 05 04 Share Map of Sea Level Trends Local trends are calculated with a least squares fit of 10 day 0 25 degree resolution grids of sea level A trend bias annual and semi annual terms are fit simultaneously Please note that these trends have been determined for a finite period 1993 present and reflect the impact of decadal scale climate variability on the regional distribution of sea level rise Additionally local sea surface height trends and variations are a result of many factors including but not limited to local crustal displacement glacial isostatic adjustment steric effects and even local wind patterns Therefore you should consider these effects in interpreting local sea surface height time series derived from our gridded data sets Data netCDF CU Sea Level Blog Correction New GMSL release and Jason 2 Switch to Side B Platform Module Senate Committee Hearing on Impacts of Rising Sea Levels on Domestic Infrastructures NASA mission takes stock of Earth s melting land ice more Our Publications Uncovering an anthropogenic sea level rise signal in the Pacific Ocean Effect of the processing methodology on satellite altimetry based global mean sea level rise over the Jason 1 operating period Australia s unique influence on global sea level in

    Original URL path: http://sealevel.colorado.edu/content/map-sea-level-trends (2015-10-07)
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  • Interactive Sea Level Time Series Wizard | CU Sea Level Research Group
    What is the format of the dates in the GMSL time series All FAQs Sea Level Links AVISO CLS Radar Altimetry Tutorial CSIRO GFZ GRACE Global Sea Level Observing System GLOSS JPL GRACE Tellus JPL Ocean Surface Topography LEGOS CTOH NASA EO World of Change NASA Global Climate Change NOAA Satellite Altimetry Permanent Service for Mean Sea Level PSMSL Radar Altimeter Database RADS USF Grace Ocean Mass UT CSR GRACE Interactive Sea Level Time Series Wizard Edited 2015 06 24 Share Select a point on the map or enter coordinates Latitude Longitude Remove Nothing Seasonal terms and mean Smoothing None Boxcar Cosine Gaussian Median Max likelihood Days Gridded SSH Anomaly Database ssh anomaly nc 1 deg x 1 deg gridded sea level anomaly time series in netCDF format the base data for the Interactive Wizard CU Sea Level Blog Correction New GMSL release and Jason 2 Switch to Side B Platform Module Senate Committee Hearing on Impacts of Rising Sea Levels on Domestic Infrastructures NASA mission takes stock of Earth s melting land ice more Our Publications Uncovering an anthropogenic sea level rise signal in the Pacific Ocean Effect of the processing methodology on satellite altimetry based global mean sea

    Original URL path: http://sealevel.colorado.edu/content/interactive-sea-level-time-series-wizard (2015-10-07)
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  • Data Processing Methods | CU Sea Level Research Group
    2008 07 03 to present Cycles 8 343 1 239 1 current Base Data Set MGDR B GDR C GDR D Orbit STD0905 Lemoine et al 2010 GDR Range Corrections Waveform Tracker GDR GDR MLE 4 Dry Troposphere GDR from ECMWF Wet Troposphere TMR Replacement Product v 1 0 GDR C Cycles 1 227 JMR Replacement Product Cycles 228 259 AMR GDR Ionosphere GDR not smoothed Sea State Bias CLS Collinear v 2009 Tran et al 2010 GDR Center of Gravity MGDR B N A Mean Sea Surface Corrections Mean Sea Surface CLS01 Ocean Tide Loading Tide GOT4 7 Ray 1999 Long Period Equilibrium Tide Cartwright Tayler 1971 Cartwright Edden 1973 Solid Earth Tide GDR Cartwright Tayler 1971 Cartwright Edden 1973 Pole Tide GDR Wahr 1985 Atmospheric Pressure Inverted Barometer AVISO Dynamic Atmosphere Correction DAC that combines MOG2D high frequency and inverted barometer low frequency signals Pascual et al 2008 Glacial Isostatic Adjustment GIA 0 3 mm yr Peltier 2001 2002 2009 Peltier Luthcke 2009 Processing Corrections Inter Mission Bias 88 48 mm TOPEX to Jason 1 100 82 mm Jason 1 to Jason 2 Minimum Ocean Depth 120 m Outlier Removal anomaly greater than 2 m Global mean sea level We chose to reference TOPEX and Jason SSH anomalies on the common ground track to an along track mean computed by the CLS 01 mean sea surface 1 Each cycle of T P and Jason data are referenced to a standard set of locations using a cross track gradient correction Global mean sea level was computed from the corrected SSH anomalies using a simple equal area weighted average 2 See our calibration paper Leuliette E W R S Nerem and G T Mitchum Calibration of TOPEX Poseidon and Jason Altimeter Data to Construct a Continuous Record of Mean Sea

    Original URL path: http://sealevel.colorado.edu/content/data-processing-methods (2015-10-07)
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  • Tide Gauge Sea Level | CU Sea Level Research Group
    float operating in a stilling well Surveys of the tide gauge site are performed regularly to account for any settling of the site Tide gauges may also move vertically with the region as a result of post glacial rebound tectonic uplift or crustal subsidence This greatly complicates the problem of determining global sea level change from tide gauge data Differences in global sea level estimates from tide gauge data usually reflect the investigator s approach in considering these vertical crustal movements Tide gauges also monitor meteorological factors that affect sea levels such as barometric pressure and wind speed so that these variable factors can be eliminated from long term assessments of sea level change Although the global network of tide gauges comprises of a poorly distributed sea level measurement system it offers the only source of historical precise long term sea level data Major conclusions from tide gauge data have been that global sea level has risen approximately 10 25 cm during the past century Tide Gauge Estimates of Mean Sea Level Rise Estimates of global sea level rise which were derived from tide gauge records are found in the table below Most of the investigators reported that the estimated values were sensitive to the choice of record length and the tide gauges selected This sensitivity coupled with different computational techniques and modeling would certainly explain some of the differences shown below Sea Level Rise mm yr Error mm yr Data Used years of Tide Gauges References 2 8 0 8 1993 2009 200 Church White 2011 1 7 0 2 1900 2009 38 since 1900 Church White 2011 1 9 0 4 1961 2009 190 since 1960 Church White 2011 1 43 0 14 1881 1980 152 Barnett 1984 2 27 0 23 1930 1980 152 Barnett 1984 1

    Original URL path: http://sealevel.colorado.edu/content/tide-gauge-sea-level (2015-10-07)
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  • Steric-Related Sea Level Change Estimates | CU Sea Level Research Group
    is glacial isostatic adjustment GIA and why do you correct for it Can I subscribe to the mean sea level estimates What is the format of the dates in the GMSL time series All FAQs Sea Level Links AVISO CLS Radar Altimetry Tutorial CSIRO GFZ GRACE Global Sea Level Observing System GLOSS JPL GRACE Tellus JPL Ocean Surface Topography LEGOS CTOH NASA EO World of Change NASA Global Climate Change NOAA Satellite Altimetry Permanent Service for Mean Sea Level PSMSL Radar Altimeter Database RADS USF Grace Ocean Mass UT CSR GRACE Steric Related Sea Level Change Estimates Edited 2011 02 22 Share Reference Steric sea level change w RMS errors mm yr Period Depth range m Data source Antonov et al 2005 0 40 0 05 1955 1998 0 3000 Levitus et al 2005 Antonov et al 2005 0 34 0 04 1955 2003 0 700 Levitus et al 2005 Ishii et al 2005 0 38 0 04 1955 2003 0 700 Ishii et al 2005 Antonov et al 2005 1 23 0 2 1993 2003 0 700 Levitus et al 2005 Ishii et al 2005 1 8 0 2 1993 2003 0 700 Ishii et al 2005 Willis et al 2004 1 6 0 3 1993 2003 0 750 Willis et al 2004 CU Sea Level Blog Correction New GMSL release and Jason 2 Switch to Side B Platform Module Senate Committee Hearing on Impacts of Rising Sea Levels on Domestic Infrastructures NASA mission takes stock of Earth s melting land ice more Our Publications Uncovering an anthropogenic sea level rise signal in the Pacific Ocean Effect of the processing methodology on satellite altimetry based global mean sea level rise over the Jason 1 operating period Australia s unique influence on global sea level in 2010 2011 The 2011

    Original URL path: http://sealevel.colorado.edu/content/steric-related-sea-level-change-estimates (2015-10-07)
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  • CU Sea Level Library | CU Sea Level Research Group
    Remote Sensing 6 no 3 2014 2255 2281 Abstract Tagged XML BibTex Google Scholar Garcia E D Sandwell and W Smith Retracking CryoSat 2 Envisat and Jason 1 radar altimetry waveforms for improved gravity field recovery Geophysical Journal International 196 no 3 2014 1402 1422 Abstract Tagged XML BibTex Google Scholar Khan S K Kjær M Bevis J Bamber J Wahr K Kjeldsen A Bjørk N Korsgaard L Stearns M van den Broeke et al Sustained mass loss of the northeast Greenland ice sheet triggered by regional warming Nature Climate Change 2014 Abstract Tagged XML BibTex Google Scholar Fu L and C Ubelmann On the Transition from Profile Altimeter to Swath Altimeter for Observing Global Ocean Surface Topography Journal of Atmospheric and Oceanic Technology 31 no 2 2014 560 568 Abstract Tagged XML BibTex Google Scholar Hamlington B R Leben M Strassburg and K Y Kim Cyclostationary empirical orthogonal function sea level reconstruction Geoscience Data Journal 2014 n a n a Abstract Tagged XML BibTex Google Scholar Gardner J D Garton J Collen and D Zwartz Distant Storms as Drivers of Environmental Change at Pacific Atolls PLoS ONE 9 no 1 2014 e87971 Abstract Tagged XML BibTex Google Scholar Bunge L and A Clarke On the warm water volume and its changing relationship with ENSO Journal of Physical Oceanography 2014 140130142443001 Abstract Tagged XML BibTex Google Scholar 2013 Kriebel D and J Geiman A Coastal Flood Stage to Define Existing and Future Sea Level Hazards Journal of Coastal Research 2013 Abstract Tagged XML BibTex Google Scholar Batstone C M Lawless J Tawn K Horsburgh D Blackman A McMillan D Worth S Laeger and T Hunt A UK best practice approach for extreme sea level analysis along complex topographic coastlines Ocean Engineering 71 2013 28 39 Abstract Tagged XML BibTex Google Scholar Fasullo J C Boening F Landerer and R S Nerem Australia s unique influence on global sea level in 2010 2011 Geophysical Research Letters 40 no 16 2013 4368 4373 Abstract Tagged XML BibTex Google Scholar Ivins E T James J Wahr E Schrama F Landerer and K Simon Antarctic contribution to sea level rise observed by GRACE with improved GIA correction Journal of Geophysical Research Solid Earth 2013 n a n a Abstract Tagged XML BibTex Google Scholar Nick F A Vieli M Andersen I Joughin A Payne T Edwards F Pattyn and R van de Wal Future sea level rise from Greenland s main outlet glaciers in a warming climate Nature 497 no 7448 2013 235 238 Abstract Tagged XML BibTex Google Scholar Gardner A G Moholdt J Cogley B Wouters A Arendt J Wahr E Berthier R Hock W Pfeffer G Kaser et al A Reconciled Estimate of Glacier Contributions to Sea Level Rise 2003 to 2009 Science 340 no 6134 2013 852 857 Abstract Tagged XML BibTex Google Scholar Piecuch C K Quinn and R Ponte Satellite derived interannual ocean bottom pressure variability and its relation to sea level Geophysical Research Letters 2013 n a

    Original URL path: http://sealevel.colorado.edu/biblio (2015-10-07)
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