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On January 20, 2022 at 3:26:55 AM UTC, seanh:
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Added resource 20211130-聂亚飞中芬会议海报模板.jpg to 中分合作交流会_第一期
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13 | "metadata_created": "2022-01-20T03:26:28.420492", | 13 | "metadata_created": "2022-01-20T03:26:28.420492", | ||
n | 14 | "metadata_modified": "2022-01-20T03:26:28.420500", | n | 14 | "metadata_modified": "2022-01-20T03:26:55.550336", |
15 | "name": "zhongfen_1th", | 15 | "name": "zhongfen_1th", | ||
16 | "notes": "Abstract\uff1a\r\nIn this study, sea ice concentration | 16 | "notes": "Abstract\uff1a\r\nIn this study, sea ice concentration | ||
17 | (SIC) budgets were calculated for five ocean-sea ice reanalyses (CFSR, | 17 | (SIC) budgets were calculated for five ocean-sea ice reanalyses (CFSR, | ||
18 | C-GLORSv7, GLORYS12v1, NEMO-EnKF and ORAS5), in the Southern Ocean and | 18 | C-GLORSv7, GLORYS12v1, NEMO-EnKF and ORAS5), in the Southern Ocean and | ||
19 | compared with observations. When applying the SIC budget diagnostics | 19 | compared with observations. When applying the SIC budget diagnostics | ||
20 | to decompose the changes in SIC into contributions from advection, | 20 | to decompose the changes in SIC into contributions from advection, | ||
21 | divergence, thermodynamics, deformation and data assimilation, we find | 21 | divergence, thermodynamics, deformation and data assimilation, we find | ||
22 | that the driving atmospheric and oceanic forcings are the most | 22 | that the driving atmospheric and oceanic forcings are the most | ||
23 | significant contributors on the budget differences. For the CFSR, the | 23 | significant contributors on the budget differences. For the CFSR, the | ||
24 | primary source of deviation compared to other reanalyses is the | 24 | primary source of deviation compared to other reanalyses is the | ||
25 | stronger northward component of surface-ocean current, which results | 25 | stronger northward component of surface-ocean current, which results | ||
26 | in stronger sea ice advection and divergence. These deviations are | 26 | in stronger sea ice advection and divergence. These deviations are | ||
27 | related to excessive freezing that results in an average CFSR sea ice | 27 | related to excessive freezing that results in an average CFSR sea ice | ||
28 | thickness being twice that of other reanalyses. The secondary source, | 28 | thickness being twice that of other reanalyses. The secondary source, | ||
29 | because Coriolis force is proportional to sea ice thickness, is the | 29 | because Coriolis force is proportional to sea ice thickness, is the | ||
30 | more northward velocity of free-drifting sea ice from the | 30 | more northward velocity of free-drifting sea ice from the | ||
31 | predominantly westerly winds and currents in the Antarctic Circumpolar | 31 | predominantly westerly winds and currents in the Antarctic Circumpolar | ||
32 | Current. In summary, this could be interpreted as a positive feedback | 32 | Current. In summary, this could be interpreted as a positive feedback | ||
33 | between sea ice thickness and northward sea ice transport. The other | 33 | between sea ice thickness and northward sea ice transport. The other | ||
34 | three reanalyses, C-GLORSv7, GLORYS12V1 and ORAS5, in contrast to the | 34 | three reanalyses, C-GLORSv7, GLORYS12V1 and ORAS5, in contrast to the | ||
35 | CFSR, underestimate the contribution of dynamics to changes in SIC | 35 | CFSR, underestimate the contribution of dynamics to changes in SIC | ||
36 | with respect to observations. The NEMO-EnKF, using NCEP as an | 36 | with respect to observations. The NEMO-EnKF, using NCEP as an | ||
37 | atmospheric forcing, has the largest zonal sea ice velocity among all | 37 | atmospheric forcing, has the largest zonal sea ice velocity among all | ||
38 | reanalyses, but compared to observations, the effect of the dynamics | 38 | reanalyses, but compared to observations, the effect of the dynamics | ||
39 | on sea ice change is also underestimated because the northward | 39 | on sea ice change is also underestimated because the northward | ||
40 | velocity and north-south velocity gradient are not large enough. | 40 | velocity and north-south velocity gradient are not large enough. | ||
41 | Another effect of excessively large wind speeds on the NEMO-EnKF is | 41 | Another effect of excessively large wind speeds on the NEMO-EnKF is | ||
42 | that they produce more sea ice convergence than other | 42 | that they produce more sea ice convergence than other | ||
43 | systems.\r\nshort-bio\uff1a\r\nYafei Nie is a PhD student from the | 43 | systems.\r\nshort-bio\uff1a\r\nYafei Nie is a PhD student from the | ||
44 | Ocean University of China (supervisor: Xianqing Lv), now visiting in | 44 | Ocean University of China (supervisor: Xianqing Lv), now visiting in | ||
45 | University of Helsinki (supervisor: Petteri Uotila). His research | 45 | University of Helsinki (supervisor: Petteri Uotila). His research | ||
46 | topics include ocean dynamics, sea-ice geophysics, data assimilation | 46 | topics include ocean dynamics, sea-ice geophysics, data assimilation | ||
47 | and ocean reanalysis.", | 47 | and ocean reanalysis.", | ||
n | 48 | "num_resources": 0, | n | 48 | "num_resources": 1, |
49 | "num_tags": 0, | 49 | "num_tags": 0, | ||
50 | "organization": { | 50 | "organization": { | ||
51 | "approval_status": "approved", | 51 | "approval_status": "approved", | ||
52 | "created": "2020-04-30T11:11:08.802657", | 52 | "created": "2020-04-30T11:11:08.802657", | ||
53 | "description": "Aerospace Information Research Institute (AIR) | 53 | "description": "Aerospace Information Research Institute (AIR) | ||
54 | under the Chinese Academy of Sciences (CAS) was established in July | 54 | under the Chinese Academy of Sciences (CAS) was established in July | ||
55 | 2017, following the approval for consolidation of three CAS | 55 | 2017, following the approval for consolidation of three CAS | ||
56 | institutes: the Institute of Electronics (IECAS), the Institute of | 56 | institutes: the Institute of Electronics (IECAS), the Institute of | ||
57 | Remote Sensing and Digital Earth (RADI), and the Academy of | 57 | Remote Sensing and Digital Earth (RADI), and the Academy of | ||
58 | Opto-Electronics (AOE) at CAS President Board Meeting. The merger is | 58 | Opto-Electronics (AOE) at CAS President Board Meeting. The merger is | ||
59 | the outcome of CAS efforts towards reformation of its R&D system to | 59 | the outcome of CAS efforts towards reformation of its R&D system to | ||
60 | meet future R&D challenges and to better meet the national demands.", | 60 | meet future R&D challenges and to better meet the national demands.", | ||
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64 | "name": "air", | 64 | "name": "air", | ||
65 | "state": "active", | 65 | "state": "active", | ||
66 | "title": "Aerospace Information Research Institute, CAS", | 66 | "title": "Aerospace Information Research Institute, CAS", | ||
67 | "type": "organization" | 67 | "type": "organization" | ||
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