气候变化领域集成服务门户(CCPortal): Evaluation of Shipboard and Satellite-Derived Bathymetry and Gravity Data Over Seamounts in the Northwest Pacific Ocean

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DOI	10.1029/2020JB020396
	Evaluation of Shipboard and Satellite-Derived Bathymetry and Gravity Data Over Seamounts in the Northwest Pacific Ocean
	Watts A.B.; Tozer B.; Harper H.; Boston B.; Shillington D.J.; Dunn R.
发表日期	2020
ISSN	21699313
卷号	125 期号:10
英文摘要	Earth's surface topography/bathymetry and gravity fields provide important constraints on crustal structure and the tectonic processes that act on it due, for example, to plate flexure and mantle convection. Such studies require, however, high accuracy measurements at a wide range of spatial scales. During the past few decades much progress has been made in the acquisition of bathymetry and gravity data using both shipboard and satellite altimeter methods. Surprisingly, there have been few comparisons of these data. During April–June, 2019 we had the opportunity onboard a R/V Marcus G. Langseth cruise in the northwest Pacific Ocean to compare data acquired with an EM122 Kongsberg swath bathymetry system and a refurbished Bell Aerospace BGM-3 gravimeter with the most recent global bathymetry and gravity fields. We find that while the recovery of bathymetry and gravity from satellite radar altimeter data in areas of sparse shipboard data has been impressive, root mean square discrepancies in the range 175.5–303.4 m and 2.6–6.3 mGal exist between shipboard and satellite-derived data. While these discrepancies are small, they are highly correlated and therefore have implications for the density structure, rock type and geological processes occurring on the deep seafloor. Shipboard data should continue to be acquired, especially over features such as seamounts, banks, and ridges that are associated with short wavelength (<25 km wavelength) bathymetric and gravimetric features beyond that is recoverable in satellite-derived data. ©2020. The Authors.
英文关键词	gravity anomalies and Earth structure (1219); instruments and techniques (940); marine geology and geophysics (3000); satellite geodesy (1240); seafloor morphology (3045)
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187587
作者单位	Department of Earth Sciences, University of Oxford, Oxford, United Kingdom; Scripps Institution of Oceanography, La Jolla, CA, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; School of Earth and Sustainability, Northern Arizona University, Flagstaff, AZ, United States; Department of Earth Sciences, School of Ocean and Earth Science and Technology, University of Hawaii, Honolulu, HI, United States
推荐引用方式 GB/T 7714	Watts A.B.,Tozer B.,Harper H.,et al. Evaluation of Shipboard and Satellite-Derived Bathymetry and Gravity Data Over Seamounts in the Northwest Pacific Ocean[J],2020,125(10).
APA	Watts A.B.,Tozer B.,Harper H.,Boston B.,Shillington D.J.,&Dunn R..(2020).Evaluation of Shipboard and Satellite-Derived Bathymetry and Gravity Data Over Seamounts in the Northwest Pacific Ocean.Journal of Geophysical Research: Solid Earth,125(10).
MLA	Watts A.B.,et al."Evaluation of Shipboard and Satellite-Derived Bathymetry and Gravity Data Over Seamounts in the Northwest Pacific Ocean".Journal of Geophysical Research: Solid Earth 125.10(2020).