本数据为新疆逐日降尺度500m积雪深度数据。其生产主要基于随机森林算法，利用中国长时间序列雪深数据集、地形数据、空间位置数据、积雪覆盖日数等制备了2010-2020年期间空间分辨率为500m的逐日积雪深度数据集。该数据集以TIF文件格式存储，命名规则为：“SNDP+year+DOY.tif”，DOY为年积日。本数据集以期为积雪的深入研究与准确分析、气候变化、雪灾预警等提供有效的数据支撑。
", "ds_source": "通过国家青藏高原科学数据中心下载的“中国长时间序列雪深数据集”；通过Earthdata下载的MOD13A1归一化植被指数数据；通过地理空间数据云平台下载的SRTM地形数据，包括海拔、坡度、坡向、地表粗糙度数据。
", "ds_process_way": "本数据集以新疆气象站点数据、中国长时间序列雪深数据集、经度、纬度、SRTM海拔、坡度、坡向、地表粗糙度、MOD13A1归一化植被指数数据、积雪覆盖日数数据为基础，建立以随机森林算法为基础的积雪深度降尺度模型，根据此模型生产500m降尺度积雪深度产品。
", "ds_quality": "该数据的原始数据为中国长时间序列雪深数据集，以新疆地区50个实测站台点提供的2013年至2020年的雪深实测数据对降尺度前后雪深数据集进行精度评估与对比，结果表明通过降尺度降尺度后雪深数据的精度有所提升，平均决定系数R2为0.61，数据综合评价指标KEG’为0.64，均方根误差RMSE为4.59cm，平均绝对误差MAE为1.36cm，相关系数为0.81。
", "ds_acq_start_time": "2010-01-01 00:00:00", "ds_acq_end_time": "2020-12-31 00:00:00", "ds_acq_place": "新疆维吾尔自治区", "ds_acq_lon_east": 97.08, "ds_acq_lat_south": 33.37, "ds_acq_lon_west": 70.25, "ds_acq_lat_north": 49.93, "ds_acq_alt_low": -158.0, "ds_acq_alt_high": 7804.0, "ds_share_type": "apply-access", "ds_total_size": 287595633758, "ds_files_count": 12059, "ds_format": "tiff", "ds_space_res": "500m", "ds_time_res": "日", "ds_coordinate": "WGS84", "ds_projection": "经纬", "ds_thumbnail": "50fa2bae-9034-4eb4-aa97-f8fc5fc7c38f.jpg", "ds_thumb_from": 0, "ds_ref_way": "李海星，新疆地区500m逐日积雪深度数据集（2010-2020年），国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn/)，2023，doi：10.12072/ncdc.nieer.db2841.2023", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "c6ac5c3c-eb4f-4119-86fb-c4534a9bd7fb", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.45" ], "quality_level": 3, "publish_time": "2023-05-05 17:56:07", "last_updated": "2023-06-20 02:10:08", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.NCDC.NIEER.DB2841.2023", "i18n": { "en": { "title": "500m Daily Snow Depth Dataset in Xinjiang (2010-2020)", "ds_format": "", "ds_source": "", "ds_quality": "", "ds_ref_way": "", "ds_abstract": "", "ds_time_res": "日", "ds_acq_place": "", "ds_space_res": "500m", "ds_projection": "", "ds_process_way": "", "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, "ds_topic_tags": [ "积雪 雪深" ], "ds_subject_tags": [ "地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "新疆" ], "ds_time_tags": [ 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 ], "ds_contributors": [ { "true_name": "李海星", "email": "leehaixing@126.com", "work_for": "南京工业大学", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "李海星", "email": "leehaixing@126.com", "work_for": "南京工业大学", "country": "中国" } ], "ds_managers": [ { "true_name": "李海星", "email": "leehaixing@126.com", "work_for": "南京工业大学", "country": "中国" } ], "category": "积雪" }