Studying the Earth’s Gravity from Space: The Gravity Recovery and Climate Experiment (GRACE)
ثبت نشده
چکیده
The first 111 days of preliminary data from GRACE were used to produce a map of the Earth’s gravity anomalies. A gravity anomaly map shows us how much the actual Earth’s gravity field departs from “normal” as defined by a simplified mathematical gravity model that assumes the Earth is perfectly smooth and featureless. In this grayscale representation, brighter areas represent positive gravity anomalies (note the Andes mountain range in South America), while darker areas represent negative gravity anomalies (note the Puerto Introduction
منابع مشابه
The ANU GRACE visualisation web portal
The launch of the Gravity Recovery and Climate Experiment (GRACE) space gravity mission opened new horizons to the scientific community for environmental monitoring. Through the provision of estimates of temporal changes in the Earth’s gravity field, the products generated from the GRACE mission have enabled studies of mass balance changes in polar regions, deformation caused by very large eart...
متن کاملWavelet analysis of GRACE K-band range rate measurements related to Urmia Basin
Space-borne gravity data from Gravity Recovery and Climate Experiment (GRACE), as well as some other in situ and remotely sensed satellite data have been used to determine water storage changes in Lake Urmia Basin (Iran). As usual, the GRACE products are derived from precise inter-satellite range rate measurements converted to different formats such as spherical harmonic coefficients and equiva...
متن کاملUsing ground-based gravity measurements to monitor changes in terrestrial water storage
Monitoring changes in the Earth’s gravity field for terrestrial water storage change (soil moisture, ground water, snow etc.) is a relatively new and novel concept that has been inspired by the Gravity Recovery And Climate Experiment (GRACE) satellite mission. GRACE will soon be providing time varying maps of the Earth’s gravity. However, there has been no field based study to demonstrate that ...
متن کاملStatistical downscaling of GRACE gravity satellite-derived groundwater level data
With the continued threat from climate change, population growth and followed by increasing water demand, the need for hydrological data with high spatial resolution and proper time coverage to be felt more than ago. Therefore, having data such as terrestrial water storage changes and groundwater level changes with high resolution spatial helps to plan and make decisions for water resource mana...
متن کاملCrustal dilatation observed by GRACE after the 2004 Sumatra-Andaman earthquake.
We report the detection of an earthquake by a space-based measurement. The Gravity Recovery and Climate Experiment (GRACE) satellites observed a +/-15-microgalileo gravity change induced by the great December 2004 Sumatra-Andaman earthquake. Coseismic deformation produces sudden changes in the gravity field by vertical displacement of Earth's layered density structure and by changing the densit...
متن کامل