Presentation is loading. Please wait.

Presentation is loading. Please wait.

Water storage variations from time-variable gravity data Andreas Güntner Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences Section.

Published byAmelia Sparks Modified over 8 years ago

Similar presentations

Presentation on theme: "Water storage variations from time-variable gravity data Andreas Güntner Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences Section."— Presentation transcript:

1 Water storage variations from time-variable gravity data Andreas Güntner Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences Section 5.4 Hydrology IASS, Potsdam, 30.08.2010

2 | Andreas Güntner | German Research Centre for Geosciences2 P: Precipitation E: Evaporation R: Runoff  S: Water storage change Resolving the continental water balance equation Several storage components: Snow and ice Groundwater Soil moisture Surface water ΔS = P – E – R ΔSΔS Variations in continental water storage

3 | Andreas Güntner | German Research Centre for Geosciences3 GRACE overview Launched in March 2002 Orbit height: 470 km Distance of both satellites: 250 km Polar orbit

4 | Andreas Güntner | German Research Centre for Geosciences4 GRACE overview Figure: Mayer-Gürr IGG Bonn Distance: about 250 000 000 000 μm Measurement accuracy

5 | Andreas Güntner | German Research Centre for Geosciences5 Monitoring the Earth’s gravity field and its temporal variations caused by mass transport processes - Earth's interior - Atmosphere - Oceans - Continental hydrology - Ice caps, glaciers GRACE overview

6 | Andreas Güntner | German Research Centre for Geosciences6  Temporal variations of the gravity field of the Earth  Water mass variations on the continents after removal of other mass components  S: Water storage change P: Precipitation E: Evaporation Q: Runoff ΔS = P - Q - E Only integrative and large-scale measurement of ΔS for hydrology Water storage variations from time-variable gravity data

7 | Andreas Güntner | German Research Centre for Geosciences7  Temporal variations of the gravity field of the Earth  Water mass variations on the continents after removal of other mass components  S: Water storage change P: Precipitation E: Evaporation Q: Runoff ΔS = P - Q - E Water storage variations from time-variable gravity data Temporal resolution: 10 days to monthly

8 | Andreas Güntner | German Research Centre for Geosciences8 Figure: Mayer-Gürr IGG Bonn Approximation of the Earth’s gravitational potential by spherical harmonics GRACE overview Degree

9 | Andreas Güntner | German Research Centre for Geosciences9 Figure: Mayer-Gürr IGG Bonn Approximation of the Earth’s gravitational potential by spherical harmonics Degree n Number of coefficients

10 | Andreas Güntner | German Research Centre for Geosciences10 GRACE applications for mountain cryosphere Patagonia Icefield Chen et al. (2007), GRL Mass loss (Gt/a)Period -28 ± 1104/2002-12/2006 Correction for post-glacial rebound contribution of +9 ± 8 Gt/a included

11 | Andreas Güntner | German Research Centre for Geosciences11 GRACE applications for mountain cryosphere Asia Matsuo & Heki (2010), EPSL Mass loss (Gt/a)Period -47 ± 1204/2002-04/2009 Groundwater depletion in NW-India

12 | Andreas Güntner | German Research Centre for Geosciences12 GRACE applications for mountain cryosphere Golf of Alaska Glacier Region Luthcke et al. (2008), J.Gaciol. Mass loss (Gt/a)PeriodStudy -84 ± 504/2003- 03/2007 Luthcke et al. (2008) -101 ± 2204/2002- 11/2005 Chen et al. (2006) -115 ± 2004/2002- 06/2004 Tamisiea et al. (2005)

13 | Andreas Güntner | German Research Centre for Geosciences13 GRACE applications for mountain cryosphere Golf of Alaska Glacier Region Luthcke et al. (2008), J Gaciol. Temporal sampling: 10 days Spatial sampling: 2 x 2° (~50000 km²) Estimated uncertainty of mass variation recovery for this resolution: 3.5 Gt

14 | Andreas Güntner | German Research Centre for Geosciences14 GRACE applications for mountain cryosphere Benefits Time series of total ice mass variations Large-scale, spatially comprehensive data for mountain ranges Limitations Possible signal contamination by other mass redistribution processes (e.g., groundwater, postglacial rebound, sediment transport), need for signal separation Low spatial resolution relative data (storage variations) Perspectives Advanced exploration of GRACE data (improved processing, longer time series, other regions, e.g., Iceland, Franz Josef Land, Svalbard, individual Asian mountain ranges) Combined analyses of gravimetric data, altimetry, GPS, InSAR GRACE Follow-on mission with higher resolution time-variable gravity data

Download ppt "Water storage variations from time-variable gravity data Andreas Güntner Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences Section."

Similar presentations

Comparison of full-repeat and sub-cycle solutions in gravity recovery simulations of a GRACE-like mission Siavash Iran Pour, Nico Sneeuw, Matthias Weigelt,

Comparison of full-repeat and sub-cycle solutions in gravity recovery simulations of a GRACE-like mission Siavash Iran Pour, Nico Sneeuw, Matthias Weigelt,
Glacial Isostatic Adjustment Contributions to Tide Gauge, Altimetry and GRACE Observations Glenn Milne Dept of Earth Sciences University of Durham, UK.

Glacial Isostatic Adjustment Contributions to Tide Gauge, Altimetry and GRACE Observations Glenn Milne Dept of Earth Sciences University of Durham, UK.
Effect of Surface Loading on Regional Reference Frame Realization Hans-Peter Plag Nevada Bureau of Mines and Geology and Seismological Laboratory University.

Effect of Surface Loading on Regional Reference Frame Realization Hans-Peter Plag Nevada Bureau of Mines and Geology and Seismological Laboratory University.
Some Hydrological and Cryospheric Applications of GRACE John Wahr (U of Colorado), Sean Swenson (NCAR), Isabella Velicogna (U of California at Irvine)

Some Hydrological and Cryospheric Applications of GRACE John Wahr (U of Colorado), Sean Swenson (NCAR), Isabella Velicogna (U of California at Irvine)
Climate change in the Antarctic. Turner et al, 2006. Significant warming of the Antarctic Winter Troposphere. Science, vol 311, pp 1914-1916. Radiosonde.

Climate change in the Antarctic. Turner et al, Significant warming of the Antarctic Winter Troposphere. Science, vol 311, pp Radiosonde.
Present-Day Sea Level Change Present-Day Sea Level Change Assessment and Key Uncertainties Anny Cazenave Anny Cazenave LEGOS, Toulouse.

Present-Day Sea Level Change Present-Day Sea Level Change Assessment and Key Uncertainties Anny Cazenave Anny Cazenave LEGOS, Toulouse.
Hydrosphere Only planet with correct atmospheric pressure and temperature to allow water to exist in all its phases 97% water held in ocean basins 2% water.

Hydrosphere Only planet with correct atmospheric pressure and temperature to allow water to exist in all its phases 97% water held in ocean basins 2% water.
What's Happening in the Bathtub?: An Overview of Present-Day Sea Level Change R. Steven Nerem University of Colorado Department of Aerospace Engineering.

What's Happening in the Bathtub?: An Overview of Present-Day Sea Level Change R. Steven Nerem University of Colorado Department of Aerospace Engineering.
This study is a part of the activity in the frameworks of ISTC 2975 project “New methods of interpretation of new satellite data on the Earth gravity field.

This study is a part of the activity in the frameworks of ISTC 2975 project “New methods of interpretation of new satellite data on the Earth gravity field.
Facilitating Joint Analysis of Data From Several Systems Using Geophysical Models Hans-Peter Plag, William C. Hammond, Geoffrey Blewitt Nevada Bureau of.

Facilitating Joint Analysis of Data From Several Systems Using Geophysical Models Hans-Peter Plag, William C. Hammond, Geoffrey Blewitt Nevada Bureau of.
Time-depending validation of ocean mass anomalies from GRACE by means of satellite altimetry and numerical models Henryk Dobslaw and Maik Thomas GeoForschungsZentrum.

Time-depending validation of ocean mass anomalies from GRACE by means of satellite altimetry and numerical models Henryk Dobslaw and Maik Thomas GeoForschungsZentrum.
Cryospheric and Hydrologic Contributions to Global Sea Level Change M. Tamisiea Proudman Oceanographic Laboratory R. Steven Nerem University of Colorado.

Cryospheric and Hydrologic Contributions to Global Sea Level Change M. Tamisiea Proudman Oceanographic Laboratory R. Steven Nerem University of Colorado.
Recent results from GRACE in Greenland and Antarctica Isabella Velicogna* and John Wahr** * ESS, University of California Irvine, Irvine CA ** Dept Of.

Recent results from GRACE in Greenland and Antarctica Isabella Velicogna* and John Wahr** * ESS, University of California Irvine, Irvine CA ** Dept Of.
Hydrologic Cycle/Water Balances. Earth’s Water Covers approximately 75% of the surface Volcanic emissions Only known substance that naturally exists as.

Hydrologic Cycle/Water Balances. Earth’s Water Covers approximately 75% of the surface Volcanic emissions Only known substance that naturally exists as.
Land Surface Models & Surface Water Hydrology Cédric DAVID.

Land Surface Models & Surface Water Hydrology Cédric DAVID.
02 February 2005Goddard Space Flight Center1 Goddard Role in Understanding the Global Water Budget Water Cycle Components Present Observational Capabilities.

02 February 2005Goddard Space Flight Center1 Goddard Role in Understanding the Global Water Budget Water Cycle Components Present Observational Capabilities.
Page 1 Water vapour and clouds Important for: –accurate precipitation forecasts. –estimating surface energy budgets. –assessing climate feedback effects.

Page 1 Water vapour and clouds Important for: –accurate precipitation forecasts. –estimating surface energy budgets. –assessing climate feedback effects.
1 Refined European sea level estimations by combining altimetry, tide gauges, hydrographic and other data sets with improved regional GIA modeling and.

1 Refined European sea level estimations by combining altimetry, tide gauges, hydrographic and other data sets with improved regional GIA modeling and.
Don P. Chambers Center for Space Research The University of Texas at Austin Understanding Sea-Level Rise and Variability 6-9 June, 2006 Paris, France The.

Don P. Chambers Center for Space Research The University of Texas at Austin Understanding Sea-Level Rise and Variability 6-9 June, 2006 Paris, France The.
Remote Sensing & Geodesy. What is remote sensing? History of satellite remote sensing Satellite orbits Geophysical Examples: Multispectral, GPS, Radar/INSAR,

Remote Sensing & Geodesy. What is remote sensing? History of satellite remote sensing Satellite orbits Geophysical Examples: Multispectral, GPS, Radar/INSAR,

Similar presentations

Ads by Google