Detection of Continental Hydrology and Glaciology Signals from GRACE: A Review

Ramillien, Guillaume; Famiglietti, J. S.; Wahr, John

doi:10.1007/s10712-008-9048-9

Cited by 201 publications

(130 citation statements)

References 69 publications

(93 reference statements)

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“…Wahr et al (1998) reported that the largest-amplitude and most varied time-dependent signals are related to water storage variability on land. Ramillien et al (2008a) concluded that GRACE satellite gravimetry offers a very interesting alternative remote sensing technique to measure changes in total water storage over continental areas. This includes ice, snow, surface waters, soil moisture and groundwater.…”

Section: Introductionmentioning

confidence: 99%

Monitoring mass changes in the Volta River basin using GRACE satellite gravity and TRMM precipitation

2012

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GRACE satellite gravity data was used to estimate mass changes within the Volta River basin in West African for the period of January, 2005 to December, 2010. We also used the precipitation data from the Tropical Rainfall Measurement Mission (TRMM) to determine relative contributions source to the seasonal hydrological balance within the Volta River basin. We found out that the seasonal mass change tends to be detected by GRACE for periods from 1 month in the south to 4 months in the north of the basin after the rainfall events. The results suggested a significant gain in water storage in the basin at reference epoch 2007.5 and a dominant annual cycle for the period under consideration for both in the mass changes and rainfall time series. However, there was a low correlation between mass changes and rainfall implying that there must be other processes which cause mass changes without rainfall in the upstream of the Volta River basin. Keywords: Equivalent Water Thickness; Mass Transport; Water Storage.* Author to whom correspondence should be addressed Monitoring mass changes in the Volta River Basin usin GRACE... Bol. Ciênc. Geod., sec. Artigos, Curitiba, v. 18, n o 4, p.549-563, out-dez, 2012.5 5 0 RESUMO Dados da missão Gravity Recovery and Climate Exchange (GRACE) são usados para estimar mudanças em massa na bacia hidrográfica do Rio Volta na Africa Ocidental entre o período de janeiro de 2005 a dezembro de 2010. Empregou-se também os dados de precipitação do satélite Tropical Rainfall Measurement Mission (TRMM) para determinar a fonte de contribuições em relação ao balanço hidrológico sazonal na bacia do Rio Volta. Os resultados mostram que a mudança de massa sazonal tende a ser detectada pelos satélites da missão GRACE a partir de 1 mês, no sul e de 4 meses no norte da bacia após a precipitação. Os resultados sugerem um ganho significativo no armazenamento d'água na bacia para a época de referência 2007,5 e um ciclo anual predominante para o período considerado para mudanças em massa e precipitação. No entanto, notou-se uma baixa correlação entre as alterações da massa e precipitação o que implica que deve haver outros processos que causam mudanças em massa sem ocorrer precipitação para o montante da bacia do Rio Volta. Palavras-chave: Equivalente à Lâmina D'água; Transporte de Massa; Armazenamento D'água.

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Section: Introductionmentioning

confidence: 99%

Monitoring mass changes in the Volta River basin using GRACE satellite gravity and TRMM precipitation

2012

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“…By closing the water balance equation, components such as groundwater can be estimated. However, this is made possible only by the availability of integrated mass change that can be derived from gravity observations (Schmidt et al 2006;Ramillien et al 2008). Separating the contributions of water mass sub-reservoirs (i.e., surface waters, soil moisture, groundwater) is thus a challenge for the next GRACE-type mission, especially for estimating deep water changes that globally remain unknown.…”

Section: Estimating Continental Water Storage and Freshwater Fluxesmentioning

confidence: 99%

“…For instance, seasonal variations of hundreds of millimeter of equivalent water height have been detected by GRACE in large tropical basins (around ±500 mm in the Amazon basin, Ramillien et al 2008). Measuring water height variations with a 10-cm precision at 150-200-km resolution would allow us, for instance, to recover mass variations in basins such as the Rhine and Danube catchments, which cannot be studied with available data.…”

Section: Summary Of Emotion Science Requirementsmentioning

confidence: 99%

“…Recent results are also presented in Kusche et al (2012)). The GRACE mission has been extremely valuable in providing insight into continental hydrology (see the recent reviews by Frappart and Ramillien 2012;Güntner 2008;Ramillien et al 2008;Schmidt et al 2008), with a focus on large-scale seasonal signals, and the effects of hydrometeorological extremes such as droughts and floods. The decade of GRACE data has demonstrated beyond a doubt that glaciers in Alaska and Patagonia as well as the great ice sheets of Greenland and Antarctica are losing mass (Tamisiea et al 2005;Chen et al 2007;van den Broeke et al 2009;Velicogna 2009).…”

Section: Introductionmentioning

confidence: 99%

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Earth System Mass Transport Mission (e.motion): A Concept for Future Earth Gravity Field Measurements from Space

et al. 2012

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In the last decade, satellite gravimetry has been revealed as a pioneering technique for mapping mass redistributions within the Earth system. This fact has allowed us to have an improved understanding of the dynamic processes that take place within and -012-9209-8 between the Earth's various constituents. Results from the Gravity Recovery And Climate Experiment (GRACE) mission have revolutionized Earth system research and have established the necessity for future satellite gravity missions. In 2010, a comprehensive team of European and Canadian scientists and industrial partners proposed the e.motion (Earth system mass transport mission) concept to the European Space Agency. The proposal is based on two tandem satellites in a pendulum orbit configuration at an altitude of about 370 km, carrying a laser interferometer inter-satellite ranging instrument and improved accelerometers. In this paper, we review and discuss a wide range of mass signals related to the global water cycle and to solid Earth deformations that were outlined in the e.motion proposal. The technological and mission challenges that need to be addressed in order to detect these signals are emphasized within the context of the scientific return. This analysis presents a broad perspective on the value and need for future satellite gravimetry missions.

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“…de Jeu et al, 2008]. The twin-satellites of the Gravity Recovery and Climate Experiment (GRACE) measure variations in the gravity field of the earth with approximately monthly resolution [Ramillien et al, 2008;Tapley et al, 2004;Rodell and Famiglietti , 1999]. Regional accumulations of water (e.g.…”

Section: Terrestrial Variablesmentioning

confidence: 99%

Spatial cross‐correlation patterns of European low, mean and high flows

Gudmundsson¹,

Tallaksen²,

Stahl³

2011

Hydrological Processes

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Low and high flows are associated with different hydrological processes. High flows correspond to the direct response of catchments to water input, whereas low flows occur in pronged dry periods and are governed by depleting storages. Therefore, the inter‐annual dynamics of high and low flows are often considered to be independent. To shed light on this assumption, we analysed a pan‐European dataset of 615 streamflow records, summarized as time series of annual streamflow percentiles (5th, 10th, …, 95th). The analysis was based on comparing the spatial cross‐correlation patterns derived from the different percentile series. Their interrelation was visualized by projecting them into a low‐dimensional space. We found that large parts of the cross‐correlations of the percentile series can be summarized by one dominating component. This component represents geographical continuous regions in Europe of correlated streamflow. Departures from this mean pattern occurred for low and high flows and were characterized by the corresponding spatial correlation functions. Generally, spatial correlations appear to be stronger for high flows than for mean flows, particularly for short distances (<400 km). Low flows, on the other hand, have the lowest spatial correlations for short distances. For longer distances (>800 km), this pattern reverses and the spatial correlation of low flows become largest. This discrepancy between low and high flows suggests that hydrological systems are more homogeneously linked to climatic fluctuations under wet conditions. Under dry conditions, local catchment properties appear to play a larger role in translating climatic fluctuations into hydrological response. Copyright © 2010 John Wiley & Sons, Ltd.

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Detection of Continental Hydrology and Glaciology Signals from GRACE: A Review

Cited by 201 publications

References 69 publications

Monitoring mass changes in the Volta River basin using GRACE satellite gravity and TRMM precipitation

Monitoring mass changes in the Volta River basin using GRACE satellite gravity and TRMM precipitation

Earth System Mass Transport Mission (e.motion): A Concept for Future Earth Gravity Field Measurements from Space

Spatial cross‐correlation patterns of European low, mean and high flows

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