该数据集使用MODIS数据基于TTOP完成中巴经济走廊冻融分布。", "ds_source": "
MODIS", "ds_process_way": "
（1）数据下载与预处理\n
MODIS温度数据：通过NASA下载 MODIS 地表温度产品 MOD11A1 LST 与 MYD11A1LST 数据，空间分辨率为1km，时间分辨率为1天，获取 2010-2023年MOD11A1 白天地表温度数据、 MOD11A1 夜间地表温度数据、MYD11A1 白天地表温度数据及 MYD11A1 夜间地表温度数据等4种数据产品共 61069 景。对数据进行镶嵌、重采样、坐标转换、裁剪等预处理后合成月均值。\n
世界土壤数据库的土壤类型：模型需要不同类型土壤的冻融热导系数作为输入参数。土壤数据来源于2008年维也纳国际应用系统分析研究所（IIASA） 和联合国粮农组织（FAO）所构建的HWSDv1.2。HWSDv1.2 包括不同种类土壤的全球分布情况，土壤分类标准为FAO 90， 数据分辨率1 km，数据投影 WGS 84。\n
（2）TTOP模型\n
（3）冰川影响 \n
不考虑冰川下多年冻土情况。以地表温度和TTOP模型计算冻土分布会将部分冰川错分成冻土，需根据研究区内冰川分布数据将其去除。", "ds_quality": "
冻融分布数据经过严格的质量控制，冻融分布通过文献对比，以确保事件的真实性与空间精度。", "ds_acq_start_time": "2010-01-01 00:00:00", "ds_acq_end_time": "2023-12-31 00:00:00", "ds_acq_place": "中巴经济走廊北部高山高海拔区，中巴公路喀什至塔科特段沿途全部内流流域", "ds_acq_lon_east": 77.75, "ds_acq_lat_south": 34.5, "ds_acq_lon_west": 72.5, "ds_acq_lat_north": 40.25, "ds_acq_alt_low": 240.0, "ds_acq_alt_high": 8560.0, "ds_share_type": "login-access", "ds_total_size": 79108706, "ds_files_count": 15, "ds_format": "tif", "ds_space_res": "", "ds_time_res": "", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "56581ef0-65ab-401c-ba06-4671624a9866.png", "ds_thumb_from": 2, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "9de89acc-5714-4927-aba3-ac88067dff8a", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.4510" ], "quality_level": 3, "publish_time": "2024-06-07 17:09:03", "last_updated": "2025-12-08 17:34:28", "protected": true, "protected_to": "2026-06-07 00:00:00", "lang": "zh", "cstr": "11738.11.NCDC.NIEER.DB6504.2024", "i18n": { "en": { "title": " Freeze thawing in CPEC", "ds_format": "tif", "ds_source": "
MODIS", "ds_quality": "
The freeze-thaw distribution data undergoes strict quality control, and the freeze-thaw distribution is compared with literature to ensure the authenticity and spatial accuracy of the event.", "ds_ref_way": "", "ds_abstract": "
This dataset uses MODIS data to complete the freeze-thaw distribution of the China Pakistan Economic Corridor based on TTOP.
", "ds_time_res": "", "ds_acq_place": "The high-altitude mountainous areas in the northern part of the China Pakistan Economic Corridor, as well as all the inland river basins along the Kashgar to Takote section of the China Pakistan Highway", "ds_space_res": "", "ds_projection": "", "ds_process_way": "(1) Data Download and Preprocessing\n
MODIS temperature data: Download MODIS surface temperature products MOD11A1 LST and MYD11A1LST data from NASA, with a spatial resolution of 1km and a temporal resolution of 1 day. Obtain a total of 61069 scenes of MOD11A1 daytime surface temperature data, MOD11A1 nighttime surface temperature data, MYD11A1 daytime surface temperature data, and MYD11A1 nighttime surface temperature data from 2010 to 2023. Preprocess the data by embedding, resampling, coordinate transformation, cropping, etc., and then synthesize the monthly average.\n
Soil types in the World Soil Database: The model requires the freeze-thaw thermal conductivity coefficients of different types of soils as input parameters. The soil data is sourced from HWSDv1.2 developed by the Vienna International Institute for Applied Systems Analysis (IIASA) and the Food and Agriculture Organization of the United Nations (FAO) in 2008. HWSDv1.2 includes the global distribution of different types of soil, with soil classification standard FAO 90, data resolution 1 km, and data projection WGS 84.\n
(2) TTOP model\n
(3) Glacier impact\n
Not considering the permafrost conditions beneath glaciers. Calculating frozen soil distribution based on surface temperature and TTOP model may misclassify some glaciers into frozen soil, which needs to be removed based on glacier distribution data within the study area.", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "recommendation_value": 0, "license_type": "https://creativecommons.org/licenses/by/4.0/", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "冻融", "中巴经济走廊" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "中巴经济走廊" ], "ds_time_tags": [ 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023 ], "ds_contributors": [ { "true_name": "吴宇宏", "email": "wyh@imde.ac.cn", "work_for": "中国科学院、水利部成都山地灾害与环境研究所", "country": "中国" }, { "true_name": "聂勇", "email": "nieyong@imde.ac.cn", "work_for": "中国科学院、水利部成都山地灾害与环境研究所", "country": "中国" }, { "true_name": "韩立钦", "email": "hanliqin@lzb.ac.cn", "work_for": "河南师范大学", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "吴宇宏", "email": "wyh@imde.ac.cn", "work_for": "中国科学院、水利部成都山地灾害与环境研究所", "country": "中国" }, { "true_name": "聂勇", "email": "nieyong@imde.ac.cn", "work_for": "中国科学院、水利部成都山地灾害与环境研究所", "country": "中国" }, { "true_name": "韩立钦", "email": "hanliqin@lzb.ac.cn", "work_for": "河南师范大学", "country": "中国" } ], "ds_managers": [ { "true_name": "韩立钦", "email": "hanliqin@lzb.ac.cn", "work_for": "河南师范大学", "country": "中国" } ], "category": "其他" }