کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4688687 1635802 2008 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Contributions of terrestrial and GRACE data to the study of the secular geoid changes in North America
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Contributions of terrestrial and GRACE data to the study of the secular geoid changes in North America
چکیده انگلیسی
We apply the method of least-squares collocation with parameters to combine terrestrial data (GPS vertical velocities from the Canadian Base Network and terrestrial gravity rates from the Canadian Gravity Standardization Net) with the GRACE-derived vertical motion to obtain again the geoid rates. The combined model has a peak geoid rate of 1.4 mm/year in the southeastern area of Hudson Bay contrary to the GRACE-derived geoid rates that show a large peak of 1.6-1.7 mm/year west of Hudson Bay. We demonstrate that the terrestrial data, which have a longer time span than the GRACE data, are important for constraining the GRACE-derived secular signal in the areas that are well sampled by the data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Geodynamics - Volume 46, Issues 3–5, October 2008, Pages 131-143
نویسندگان
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