| 项目编号: | 1419366
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| 项目名称: | Relative sea-level changes from near-, intermediate- and far-field locations and their implications for geophysical modeling and 20th century ice sheet-ocean interactions |
| 作者: | Benjamin Horton
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| 承担单位: | Rutgers University New Brunswick
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| 批准年: | 2013
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| 开始日期: | 2014-02-15
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| 结束日期: | 2015-03-31
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| 资助金额: | USD41133
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Earth Sciences
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| 英文关键词: | database
; sea-level
; sea-level change
; volume change
; rsl change
; ice-margin rsl datum
; 20th century rate
; study location
; present-day change
; ice-equivalent meltwater input
; land-based ice
; last ice age
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| 英文摘要: | The goal of this research is to synthesize a database of sea-level observations in a systematic and rigorous fashion for the Atlantic coast of North America, Bermuda and the Caribbean for the last 20,000 years. The database will facilitate the interpretation of relative sea-level (RSL) change on a regional scale and enable the tuning and refinement of Earth system models that focus on predicting RSL change and its spatial variability. The database consists of 60 study locations, permitting a suite of geophysical parameters to be constrained. Earth?s lower mantle viscosity will be defined by near-field and ice-margin RSL data from the Atlantic coast of Canada and northeastern United States while the upper mantle viscosity will be reliant on intermediate-field RSL data from the mid Atlantic. Far-field RSL data from the southern United States and Caribbean will constrain ice-equivalent meltwater input. The database will be further used to decontaminate 20th century rates of sea-level rise from tides gauges to reveal spatial variability related to ocean mass and volume changes.
At the heart of this project is a database of sea level from North America (the Atlantic coast of Canada and the United States) and the Caribbean that stretches back 20,000 years. This will be significant to a number of disciplines in the Earth sciences. For example, careful reconstruction of sea levels from the past will reveal the contribution from land-based ice to sea-level change during deglaciation after the last ice age. In addition, the data will provide vital constraints on key parameters in geophysical models of the Earth that are used in a variety of other applications (e.g., plate tectonics, glaciology and paleoclimate). Overall, the observations will extend the time range of comparisons with historical and present-day changes. Consequently, this research promises to increase our understanding of the driving mechanisms of sea level change and enhance our predictions of 21st century sea-level rise. The research will also provide an important and unique contribution to the assessment of national hazards with respect to sea-level rise and coastal responses. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/97346
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Benjamin Horton. Relative sea-level changes from near-, intermediate- and far-field locations and their implications for geophysical modeling and 20th century ice sheet-ocean interactions. 2013-01-01.
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