IOCAS-SIPNet sea ice prediction for SIPN south 2023-2024

IOCAS-SIPNet_001_20231201-20240228_total-area：This file with one row and 90 comma-separated values, each expressing daily sea-ice area for the 31 + 31 + 28 days of the December-February period. Units must be 106 km². IOCAS-SIPNet_001_20231201-20240228_regional-area：This file with 36 rows each displaying 90 comma-separated values following the same requirements as diagnostic 1. Each row corresponds to a 10° longitude bin. First row: 0° - 10°; second row: 10°-20°; …, 36th row: 350°-360°. IOCAS-SIPNet_001_20231201-20240228_concentration: A NetCDF file with 90 timesteps (one per day from December 1st 2023 to February 28th 2024). Each time step displays the spatial field of sea-ice concentration. The file format must follow the CMIP6 conventions: - Sea-ice concentration is defined as the fraction of the grid cell covered by sea ice, is named siconc, and is expressed in %. - Longitude and latitude are reported under variables longitude and latitude. - A land-sea mask is provided through a variable named sftof that expresses the percentage of the grid cell covered by ocean (units %). - Areas of grid cells are provided through a variable named areacello that expresses the area of the grid cell in m².

IOCAS-SIPNet_001_20231201-20240228_total-area：该文件仅含一行数据，包含90个逗号分隔的数值，依次对应2023年12月至2024年2月时段（31天+31天+28天）的每日海冰面积，单位为106 km²。
IOCAS-SIPNet_001_20231201-20240228_regional-area：该文件包含36行数据，每行均含90个逗号分隔的数值，格式要求与前述总海冰面积文件一致。每行对应一个10°经度分区：第一行对应0°~10°，第二行对应10°~20°，……，第36行对应350°~360°。
IOCAS-SIPNet_001_20231201-20240228_concentration：该文件为网络通用数据格式（Network Common Data Form，简称NetCDF），包含90个时间步长（对应2023年12月1日至2024年2月28日的每日数据），每个时间步长均存储海冰浓度的空间场。文件格式需遵循耦合模式比较计划第六阶段（Coupled Model Intercomparison Project Phase 6，CMIP6）规范：
- 海冰浓度定义为网格单元内海冰覆盖占比，变量名为siconc，单位为%；
- 经纬度信息通过longitude和latitude变量存储；
- 海陆掩码通过sftof变量提供，该变量表示网格单元内海洋覆盖占比，单位为%；
- 网格单元面积通过areacello变量提供，单位为平方米（m²）。