该数据是利用Modis产品数据，通过重采样、拼接等处理，得到柴达木盆地2000年至2018年每年的平均积雪覆被率图。\n
本数据集主要应用于冰冻圈科学研究。", "ds_source": "
MOD10A1数据来自美国国家航空航天局(https://www.nasa.gov/)。", "ds_process_way": "
日积雪覆被率数据是在MODIS产品数据 MOD10A1的基础上，通过重采样、 拼接、剪裁等预处理，采用基于三次样条函数插值的去云算法进行去云处理后得到。最终利用arcgis计算年平均积雪率并选取DEM大于3500m的区域进行掩膜处理，得到柴木盆地的积雪覆被率数据。", "ds_quality": "
原始资料数据精度：\n
MOD10A1(500m)产品数据包含积雪覆被率和质量评估（QA）等数据。积雪覆盖数据是基于采用归一化差异积雪指数（NDSI）和其他标准测试的积雪制图算法制成。\n
在加工生成数据时，保留部分原始数据。", "ds_acq_start_time": "2000-01-01 00:00:00", "ds_acq_end_time": "2018-12-31 00:00:00", "ds_acq_place": "柴达木盆地", "ds_acq_lon_east": 99.25, "ds_acq_lat_south": 35.0, "ds_acq_lon_west": 90.25, "ds_acq_lat_north": 39.31666666666667, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 4629169, "ds_files_count": 2, "ds_format": "tif", "ds_space_res": "1000m", "ds_time_res": "", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": "eadfdb3f-d2ba-43af-9d89-5d5db1a2ffca.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "4851e874-eafc-4879-812b-ffbdd825e967", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "10.12072/ncdc.Hydro.db2432.2022", "subject_codes": [ "170.45" ], "quality_level": 3, "publish_time": "2022-09-29 11:02:15", "last_updated": "2025-04-29 16:01:26", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.Hydro.db2432.2022", "i18n": { "en": { "title": "Data set of average snow cover distribution in Qaidam region (2000-2018)", "ds_format": "TIF", "ds_source": "
Mod10a1 data from NASA（ https://www.nasa.gov/ )。", "ds_quality": "
a. Accuracy of original data\n
The product data of mod10a1 (500m) includes snow cover rate, quality assessment (QA) and other data. Snow cover data is based on the snow mapping algorithm tested using the normalized difference snow cover index (NDSI) and other standards.\n
When processing the generated data, part of the original data is retained.", "ds_ref_way": "", "ds_abstract": "
This data is based on Modis product data, processed through resampling, concatenation, etc., to obtain the annual average snow cover rate map of the Qaidam Basin from 2000 to 2018.\n
This dataset is mainly used for scientific research on the cryosphere.
", "ds_time_res": "", "ds_acq_place": "Qaidam Basin", "ds_space_res": "1000m", "ds_projection": "", "ds_process_way": "The daily snow cover rate data is obtained on the basis of MODIS product data mod10a1 through resampling, splicing, clipping and other preprocessing, and cloud removal algorithm based on cubic spline function interpolation. Finally, ArcGIS is used to calculate the annual average snow cover rate and the area with DEM greater than 3500m is selected for mask processing to obtain the snow cover rate data of Chaimu basin.", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC 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": [ "Modis产品", "柴达木盆地", "积雪覆被率" ], "ds_subject_tags": [ "地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "柴达木盆地" ], "ds_time_tags": [ 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 ], "ds_contributors": [ { "true_name": "朱高峰", "email": "zhugf@lzu.edu.cn", "work_for": "兰州大学", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "李锴基", "email": "Likj19@lzu.edu.cn", "work_for": "兰州大学", "country": "中国" } ], "ds_managers": [ { "true_name": "朱高峰", "email": "zhugf@lzu.edu.cn", "work_for": "兰州大学", "country": "中国" } ], "category": "积雪" }