基于青冰滩 72 号冰川2008-2014年冰面花杆和雪坑的观测资料，结合 LandSat系列卫星影像和 SRTM DEM 数据，利用零平衡线法对青冰滩 72号冰川的物质平衡进行计算。", "ds_source": "
自主产生。", "ds_process_way": "
零平衡线法：ba=a(ELA0-ELAa)。ba为年净平衡；ELAa为该年平衡线海拔高度；a为物质平衡梯度；ELA0为零平衡线高度。ELA0：根据地形图，结合赫斯法原理，推断72号冰川的平衡线高度约为4190 m 。ELAa：在 ArcGIS平台，基于LandSat影像进行人机交互式解译年平衡线位置。a：通过观测点物质平衡与其高程、高程带平均物质平衡与平均高程（高程带间隔为50 m）之间的关系获得。", "ds_quality": "
ELA的解译是零平衡线方法的关键，主要取决于遥感影像的质量和 DEM 的时空分辨率。遥感影像越清晰、空间分辨率越高，时间上越接近消融季末，解译的平衡线位置高度越接近真实结果。本研究所用影像的 空间分辨率为 30 m，解译精度控制在0.5个像元内。DEM 的时效性和空间分辨率对平衡线高度的判断也是至关重要的。高分辨率的 DEM成本大，并且制作高精度地形图需要很长时间才能完成，而过于陈旧的 DEM 无法准确表达当年的冰面地形。根据物质平衡观测资料显示，72号冰川的物质平衡梯度每年略有差异。主要原因是目前监测时间相对较短，冰川监测难度大。监测第一年，花杆倒伏现象严重，使得观测样本减少，直到2012年之后，冰面观测网络数据才趋于稳定。综合所有观测样本数据计算， 72号冰川物质平衡梯度纬 0. 86 m w. e.·（100m）-1。另外，零平衡线高度的确定非常重要，目前在 72 号冰川上无法直接验证。在今后的监测工作中，当条件允许时可在 ELA0位置附近选取 2~3 个点或者利用大地测量等方法进行物质平衡监测，验证72号冰川 ELA0的理论值。", "ds_acq_start_time": "2009-01-01 00:00:00", "ds_acq_end_time": "2014-12-31 00:00:00", "ds_acq_place": "天山青冰滩72号冰川", "ds_acq_lon_east": 79.91666666666667, "ds_acq_lat_south": 41.78333333333333, "ds_acq_lon_west": 79.88333333333334, "ds_acq_lat_north": 41.75, "ds_acq_alt_low": 3720.0, "ds_acq_alt_high": 5980.0, "ds_share_type": "apply-access", "ds_total_size": 9712, "ds_files_count": 2, "ds_format": "excle", "ds_space_res": "30m", "ds_time_res": "年", "ds_coordinate": "WGS84", "ds_projection": "UTM", "ds_thumbnail": "574c703d-9dcf-4544-8447-118498e405dd.png", "ds_thumb_from": 2, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "76330c66-832b-46b3-b501-f5f6edb08dc2", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.99" ], "quality_level": 3, "publish_time": "2026-02-05 15:56:31", "last_updated": "2026-02-05 15:56:31", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.NCDC.TIANSHAN.DB7119.2026", "license": null, "i18n": { "en": { "title": "The Mass Balance Dataset of Glacier No.72 in the Tomur Peak Region of the Tianshan Mountains (2009–2014)tains (2009-2014)", "ds_format": "excle", "ds_source": "
Independently generated.", "ds_quality": "
The interpretation of ELA is the key to the zero balance line method, which mainly depends on the quality of remote sensing images and the spatiotemporal resolution of DEM. The clearer the remote sensing image, the higher the spatial resolution, and the closer it is to the end of the ablation season in time, the closer the height of the interpreted equilibrium line position is to the true result. The spatial resolution of the images used in this study is 30 meters, and the interpretation accuracy is controlled within 0.5 pixels. The timeliness and spatial resolution of DEM are also crucial for determining the height of the equilibrium line. High resolution DEM has a high cost and requires a long time to produce high-precision topographic maps, while outdated DEM cannot accurately express the ice surface terrain of that year. According to material balance observation data, the material balance gradient of Glacier 72 varies slightly from year to year. The main reason is that the current monitoring time is relatively short, and glacier monitoring is difficult. In the first year of monitoring, the phenomenon of fallen flower stems was severe, resulting in a decrease in observation samples. It was not until after 2012 that the ice observation network data tended to stabilize. Based on the calculation of all observed sample data, the mass balance gradient of Glacier No. 72 is at latitude 0 86 m w. e.·（100m）-1。 In addition, the determination of the zero equilibrium line height is very important and cannot be directly verified on Glacier 72 at present. In future monitoring work, when conditions permit, 2-3 points can be selected near the ELA0 position or geodetic measurement methods can be used for material balance monitoring to verify the theoretical value of ELA0 for Glacier 72.", "ds_ref_way": "", "ds_abstract": "
Based on the observation data of ice poles and snow pits on Qingbingtan 72 Glacier from 2008 to 2014, combined with LandSat series satellite images and SRTM DEM data, the zero balance line method was used to calculate the material balance of Qingbingtan 72 Glacier.", "ds_time_res": "年", "ds_acq_place": "Tianshan Qingbingtan 72 Glacier", "ds_space_res": "30m", "ds_projection": "", "ds_process_way": "
Zero balance line method: ba=a (ELA0 ELAa). Ba is the annual net balance; ELAa is the elevation of the equilibrium line for that year; A is the gradient of material equilibrium; ELA0 is the height of the zero balance line. ELA0: Based on the topographic map and the principle of Hess method, it is inferred that the height of the equilibrium line of Glacier 72 is about 4190 meters. ELAa: Using ArcGIS platform, the annual equilibrium line position is interpreted interactively based on LandSat images. a: Obtained by observing the relationship between the material balance of the observation point and its elevation, as well as the average material balance of the elevation zone and the average elevation (with an interval of 50 meters between elevation zones).", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "ds_topic_tags": [ "天山", "冰滩72号冰川", "冰川物质平衡" ], "ds_subject_tags": [ "地球科学其他学科" ], "ds_class_tags": [], "ds_locus_tags": [ "天山青冰滩72号冰川" ], "ds_time_tags": [ 2009, 2010, 2011, 2012, 2013, 2014 ], "ds_contributors": [ { "true_name": "车彦军", "email": "che_yanjun@126.com", "work_for": "宜春学院", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "岳晓英", "email": "yuexiaoying@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "ds_managers": [ { "true_name": "岳晓英", "email": "yuexiaoying@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "category": "冰川" }