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Outline
We conduct a comparative analysis of RL06.3 time-variable gravity field models released by CSR, GFZ, and JPL, focusing on the degree one, C20 and C30 and their surface mass anomalies, mean degree variances, signal-to-noise ratios of global surface mass changes, and terrestrial water storage changes in typical regions. The results show that degree one, C20 and their surface mass anomalies of three models exhibit significant differences in trend but little differences in annual terms. For the C30, the trend shows considerable differences, while the annual terms are largely consistent. The C20 and C30 of RL06.3 models from the same institution with different truncation degrees have little impact on the trend and annual terms, but the differences between institutions are notable, particularly in the trend. The mean degree variances of three models are highly consistent in low-degree terms, while CSR RL06.3 shows the most gradual rise in noise fitting curves for high-degree terms. The terrestrial water storage inversion results from three models tend to be consistent, but the CSR and JPL models exhibit superior performance in terms of inversion accuracy and consistency. Conversely, the GFZ model generally presents a higher degree of uncertainty in its inversion results. When inverting terrestrial water storage changes, if the uncertainty of results is disregarded, it is recommended to use the GRACE time-variable gravity field models with higher truncation orders released by CSR or JPL. Otherwise, it is advisable to use the GRACE time-variable gravity field models with lower truncation orders released by CSR.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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