Causes of accelerating sea level on the East Coast of North America
| Autor: | Davis, James L., Vinogradova, Nadya T. |
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| Rok vydání: | 2017 |
| Předmět: |
Sea level change
Gravity (chemistry) 010504 meteorology & atmospheric sciences Oceanic Range (biology) Climate Planetary Waves cryospheric mass loss 010502 geochemistry & geophysics 01 natural sciences law.invention Global Change from Geodesy Acceleration GRACE law Sea Level Change sea level acceleration Research Letter Geodesy and Gravity Global Change Solid Earth climate impacts Sea level 0105 earth and related environmental sciences ECCO East coast Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions General Circulation Research Letters Barometer Climate Impact Mass Balance Geophysics Oceanography Ocean influence of Earth rotation Sea level rise Climatology Atmospheric Processes General Earth and Planetary Sciences Cryosphere Ocean Monitoring with Geodetic Techniques Sea Level: Variations and Mean Impacts of Global Change Natural Hazards Geology Oceanography: Physical |
| Zdroj: | Geophysical Research Letters |
| ISSN: | 1944-8007 0094-8276 |
| Popis: | The tide‐gauge record from the North American East Coast reveals significant accelerations in sea level starting in the late twentieth century. The estimated post‐1990 accelerations range from near zero to ∼0.3 mm yr−2. We find that the observed sea level acceleration is well modeled using several processes: mass change in Greenland and Antarctica as measured by the Gravity Recovery and Climate Experiment satellites; ocean dynamic and steric variability provided by the GECCO2 ocean synthesis; and the inverted barometer effect. However, to achieve this fit requires estimation of an admittance for the dynamical and steric contribution, possibly due to the coarse resolution of this analysis or to simplifications associated with parameterization of bottom friction in the shallow coastal areas. The acceleration from ice loss alone is equivalent to a regional sea level rise in one century of 0.2 m in the north and 0.75 m in the south of this region. Key Points Understanding sea level acceleration requires consideration of multiple spatially varying physical processesRecent acceleration is well modeled using Greenland and Antarctic ice loss and ocean dynamicsAcceleration from ice loss alone translates to regional rise of 0.2–0.75 m in one century, depending on location |
| Databáze: | OpenAIRE |
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