Results and Products
Various results and products of the first phase and second phase of the Research Unit are already or will be available.
The following table summarizes the deliverables defined for the first phase. Further Details on the IP-specific achievements and results are provided at the individual phase 1 IP pages. Several final data products of the different phase 1 IPs have been made available at GFZ Potsdam Data Services if you look for keyword "NEROGRAV" in the Search Mask top left.
| Del. | Content |
Date
|
Target IP |
|---|---|---|---|
| D1.1 | Uncertainties of present-day ocean tide models | M12 | 4,5 |
| D1.2 | New estimates of ocean and load tides |
M24 (draft) M36 (final) |
4,5 |
| D2.1 | Non-tidal atmosphere and ocean differences |
M6 (draft), M12 (final) |
3,5 |
| D2.2 | Stationary variance-covariance for A+O coefficients |
M24 (draft), M36 (final) |
4,5 |
| D2.3 | New AOD coefficients |
M24 (draft), M36 (final) |
4,5 |
| D3.1 | Alternative AO+H coefficients, high resolution over Europe |
M24 (A+H), M36 (final) |
4,5 |
| D3.2 | Ensemble of A+H coefficients for error representations | M24 | 4,5 |
| D3.3 | Error PSD and variance-covariance for A+H coefficients | M36 | P2: 4,5 |
| D3.4 | Validation over Europe |
M24 (method), M36 (results) |
2,4,5 |
| D4.1 | Stochastic models and systematic instrument characterization for ACC, KBR and LRI | M6 | 5,6 |
| D4.2 | Recommendations for individual tidal, non-tidal and empirical parametrization in combination with stochastic modelling and application to real data | M18 | 5,6 |
| D4.3 | Baseline strategy for the treatment of background model errors | M18 | 1,2,3,5,6 |
| D4.4 | Recommendation regarding methodology for combined tidal, non-tidal and empirical parametrization in combination with stochastic modelling, as well as an impact analysis of individual and combined effects and quantification of improvements. |
M32 (draft), M36 (final) |
1,2,3,5,6 |
| D4.5 | Temporal gravity field models for selected months |
M32 (draft), M36 (final) |
1,2,3,5,6 |
| D5.1 | Dominant parameter and background model errors | M18 | 1,2,3,4,6 |
| D5.2 | Time-variable gravity from 3 years of GRACE/GRACE-FO real data with improved error estimates |
M32 (draft), M36 (final) |
4,6 P2: 2,6 |
| D6.1 | Data set consisting of 3 years (2 for GRACE and 1 for GRACE-FO) of post-processed global gravity field models with realistic error estimates, including a report on the assessment and quantification of the filter effects. | M36 | P2: 2 |
| D6.2 | Report containing the evaluation and conclusive summary of results of Phase 1, an identification of research topics to be addressed in Phase 2, and recommendations to external entities. | M36 | P2: 2 |
| D6.3 | Report containing the main NGGM simulation results and the assessment of the impact of new methodological developments achieved in this RU. | M36 | P2: 2 |
Table 1: Deliverables agreed upon within the RU in the first phase. In the first column, the first digit of each ID indicates the IP responsible for generating the product. Target IP describes the IPs that are going to use those deliverables for subsequent investigations. P2 indicates that the deliverable is going to be used by given IPs in the second phase only.
The following table summarizes the deliverables defined for the second phase. Further details on the planned IP-specific achievements and results are given at the individual phase 2 IP pages. The final data products of the different phase 2 IPs will be made available in fall 2025.
| Del. | Content |
Date
|
Target IP |
|---|---|---|---|
| D1.3 | Update of uncertainties of present-day ocean tide models | M24 | 4,5 |
| D1.4 | A new combined global ocean tide atlas from EOT and TiME | M30 | 4,5 |
| D2.4 | Updated Error Covariance Matrix for AOD RL07 coefficients | M6 | 4,5 |
| D2.5 | Selection of CMIP6 experiment for NGGM/MAGIC simulations | M9 | 6 |
| D2.6 | Regions with OBP indicative of AMOC variations | M12 | 6 |
| D2.7 | AMOC variations from refined GRACE/GRACE-FO gravity fields | M36 | Paper |
| D3.4 | Improved A coefficients, high resolution over Europe |
M24 (Draft), M36 (Final) |
2,4,5 |
| D3.5 | Ensemble of A coefficients for error representations | M24 | 4,5 |
| D3.6 | Alternative A+H coefficients, high resolution over Europe |
M24 (Draft), M36 (Final) |
2,4,5 |
| D3.7 | Ensemble of A+H coefficients for error representations | M24 | 4,5 |
| D3.8 | Error PSD and variance-covariance for A+H coefficients | M36 | 2,4,5 |
| D3.9 | Validation over Europe |
M24 (method), M36 (results) |
Paper |
| D4.6 | Baseline strategy for optimal NRT/daily processing |
M18 (Draft), M30 (Final) |
4 |
| D4.7 | Daily (NRT) gravity fields for test years |
M24 (Draft), M36 (Final) |
2,6, SDS |
| D4.8 | Baseline strategy for handling of “bad” months | M20 | 4 |
| D4.9 | Gravity field models for “bad” months | M24 | 4, SDS |
| D4.10 | Baseline strategy for long-term estimates | M24 | 4, 5, SDS |
| D4.11 | Reprocessed time series for test years | M24 | 4, SDS |
| D4.12 | Monthly gravity fields combined with SLR for long time series |
M30 (Draft), M36 (Final) |
6 |
| D4.13 | Combined static gravity field model with optimal LRI data exploitation | M36 | Paper |
| D5.3 | Long time series stochastic model for ACC data, SST ranges and range accelerations, GNSS and kinematic orbits | M12 | 4 |
| D5.4 | Optimized strategy (incl. weighting scheme) for monthly GRACE/GRACE-FO gravity fields | M24 | 4,5 |
| D5.5 | Gravity field models for test months with optimized approaches for background models | M30/M36 | 4,5 |
| D6.4 | Ocean bottom pressure and oceanic stream function variables from CMIP6 model ensemble | M6 | 2 |
| D6.5 | Long-term (at least 100 years) global mass change time series from CMIP6 output |
M12 (Draft), M30 (final) |
6 |
| D6.6 | Retrieved signatures of TWS signals from long-term NGGM simulations |
M15 (Draft), M30 (Final) |
6 |
| D6.7 | Retrieved signatures of AMOC signals from long-term NGGM simulations |
M15 (Draft), M30 (Final) |
2 |
| D6.8 | Recommendations to climate modelling community | M36 | Report |
Table 2: Deliverables agreed upon within the RU in the second phase. In the first column, the first digit of each ID indicates the IP responsible for generating the product. Target IP describes the IPs that are going to use those deliverables for subsequent investigations. Since Research Units are restricted to two funding periods, several deliverables of phase 2 will not be used internally within the funding period but should become later publicly available as part of our scientific publication.