ALONG: Atlantic overturning circulation from GRACE/GRACE-FO

The Atlantic Meridional Overturning Circulation (AMOC) is a key element of heat transport in the Earth’s climate system. A slow-down would have significant impact, especially on our climate in Europe. Observations of AMOC changes, covering all of the Atlantic Ocean basin and for a substantially long time series, are so far not available. In this project, we propose to enhance the methodology to derive AMOC changes from satellite gravimetry and provide a time series of mass transport in the Atlantic Ocean, based on the full data record of the satellite missions GRACE and GRACE-FO. These novel observations will allow new insights into the AMOC through improved temporal and spatial coverage. Thus, we will make a substantial contribution to understanding and observing our changing climate, a topic which is of highest concern, both for science and society.

Acknowledgements

This project is funded within the Austrian Space Applications Program (ASAP) Phase XV by the Austrian Research Promotion Agency (FFG).

References

Journal Paper

Behzadpour, S., Mayer-Gürr, T., & Krauss, S. (2021). GRACE Follow-On Accelerometer Data
Recovery. Journal of Geophysical Research: Solid Earth, 126(5), [e2020JB021297].
doi.org/10.1029/2020JB021297

Conference Presentations and Poster

Kvas, A., Bentel, K., Behzadpour, S., & Mayer-Gürr, T. (2020). Monitoring the AMOC with
GRACE/GRACE-FO – How far can we push the spatial resolution? Paper presented at EGU
General Assembly 2020.

Behzadpour, S., Mayer-Gürr, T., Kvas, A., Krauss, S., Strasser, S. & Süsser-Rechberger, B. (2020)
GRACE-FO accelerometer data recovery within ITSG-Grace2018 data processing. Paper presented
at EGU General Assembly 2020.

Behzadpour, S., Kvas, A., & Mayer-Gürr, T. (2020) GRACE Follow-On Gravity Field Recovery from
Combined Laser and Microwave Measurements. GRACE/GRACE-FO Science Team Meeting.
Behzadpour, S., Kvas, A., & Mayer-Gürr, T. (2020). Two-step LRI1B data calibration approach.
Abstract from GRACE/GRACE-FO Science Team Meeting 2020.

Kvas, A., Behzadpour, S., Bentel, K., & Mayer-Guerr, T. (2020). Meridional Transport Variability
from GRACE Follow-On Derived Ocean Bottom Pressure Anomalies. AGU Fall Meeting Abstracts,
2020, G010-04.

Behzadpour, S., Kvas, A., & Mayer-Guerr, T. (2020). GRACE Follow-On Gravity Field Recovery
from Combined Laser and Microwave Measurements. AGU Fall Meeting Abstracts, 2020, G020-02.

Kvas, A., Bentel, K., Behzadpour, S., and Mayer-Gürr, T.: Twenty years of volume transport from
satellite gravimetry in the Atlantic and Southern Ocean, EGU General Assembly 2022, Vienna,
Austria, 23–27 May 2022, EGU22-12684, doi.org/10.5194/egusphere-egu22-12684, 2022.

Workshops

Dobslaw, H., Schindelegger, M., Kvas, A., Bingham, R., Shihora, L., & Flechtner, F. (2021). North
Atlantic Meridional Overturning Circulation: Signatures in Ocean Bottom Pressure and the Earth’s
Time-Variable Gravity Field. Paper presented at COM-ESA Workshop On User Requirements For
Space (Quantum) Gravimetry.

PhD Theses

Saniya Behzadpour. Contributions to GRACE/GRACE-FO Time-variable Gravity Field Recovery:
Detection and Mitigation of Systematic Errors and Improved Single Accelerometer Approach.
(2022)

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