显热（H）和潜热（LE）通量通常是冰川表面能量和质量平衡的重要组成部分，目前广泛采用体积法对其进行量化。然而，由于这种方法难以确定空气动力粗糙度长度 z0m，H 值和 LE 值仍可能存在较大的不确定性，误差较大。为了获得可靠的变化和固有 z0m 值，本文拟合了新的更简单的参数化z0m在不同摩擦速度u*b范围内的值。该方法利用2016年7月1日至2017年8月15日祁连山8 - 1号冰川(4817 m a.s.l)顶部的相关气象数据和冰川升华/凝结量数据进行实施。参数化结果表明，当u*b超过0.43 m/s（近似临界值）时，z0m急剧增加，而对于0.15≤u*b≤0.43 m/s范围内的每小时z0m值，雪流的影响很小，因此可用于计算日z0m。在潮湿期（2016 年 7 月 1 日至 9 月 24 日和 2017 年 5 月 5 日至 8 月 15 日），用体积法计算的湍流通量表明，净辐射 Rnet 是地表能量的主要来源（60.7 w/m2），而在干燥期（2016 年 9 月 25 日至 2017 年 5 月 4 日），主要的热汇是正 H（28.5 w/m2）而非负 Rnet（-10.0 w/m2）。", "ds_source": "
利用2016年7月1日至2017年8月15日祁连山八一冰川(4817 m a.s.l)顶部的相关气象数据和冰川升华/凝结量数据，通过拟合新的更简单的参数化z0m在不同摩擦速度ub范围内的值，获得可靠的变化和固有 z0m 值。", "ds_process_way": "
1. 体积和剖面气动方法;
\n2. z0m、z0h、z0q的粗糙度长度计算;
\n3. z0m的质量控制及其参数化方法。", "ds_quality": "
数据质量较好。", "ds_acq_start_time": "2016-07-01 00:00:00", "ds_acq_end_time": "2017-08-15 00:00:00", "ds_acq_place": "祁连山,八一冰川", "ds_acq_lon_east": 98.90333333333334, "ds_acq_lat_south": 39.0, "ds_acq_lon_west": 98.86999999999999, "ds_acq_lat_north": 39.0, "ds_acq_alt_low": 4520.0, "ds_acq_alt_high": 4817.0, "ds_share_type": "login-access", "ds_total_size": 47358, "ds_files_count": 2, "ds_format": "xlsx", "ds_space_res": "", "ds_time_res": "日", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "b0f81a59-7246-4cd1-ac4f-eff5ee543cb9.png", "ds_thumb_from": 2, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "0a4269e1-65f4-45f1-aeba-88ea3068eebf", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.15" ], "quality_level": 3, "publish_time": "2023-07-25 10:56:45", "last_updated": "2026-01-14 11:05:02", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.NCDC.ZENODO.DB3950.2023", "i18n": { "en": { "title": "Simple parameterization of aerodynamic roughness lengths and the turbulent heat fluxes at the top of midlatitude August‐one glacier, Qilian Mountains, China", "ds_format": "xlsx", "ds_source": "
Using relevant meteorological data and glacier sublimation/condensation volume data from the top of Glacier 8-1 (4817 m a.s.l) in Qilian Mountains from July 1, 2016 to August 15, 2017, reliable variations and intrinsic z0m values were obtained by fitting new and simpler parameterized z0m values over ub ranges of different friction velocities.", "ds_quality": "
The data quality is good.", "ds_ref_way": "", "ds_abstract": "
The fluxes of sensible heat (H) and latent heat (LE), which are generally the important parts of the energy and mass balances over glacier surfaces, are widely quantified by the bulk method. However, due to the difficulty of determining the aerodynamic roughness length z0m in this method, H and LE values may still have large uncertainties with significant inaccuracy. To acquire reliable varying and intrinsic z0m values, new simpler parameterizations for z0m values at different ranges of the friction velocity u*b were fitted in this study. The method was implemented using the related meteorological data and glacial sublimation/condensation measured at the top of the August‐one glacier (4817 m a.s.l.) in the Qilian Mountains from 1 July 2016 to 15 August 2017. The parameterization shows that z0m increased sharply when u*b exceeded 0.43 m/s (the approximate threshold value) and that the effect of snowdrift was slight for the hourly z0m values in the range 0.15 ≤ u*b ≤ 0.43 m/s, which could thus be used to calculate the daily z0m. During the wet period (1 July to 24 September 2016 and 5 May to 15 August 2017), the turbulent fluxes calculated by the bulk method showed that net radiation Rnet was the primary source of surface energy (60.7 w/m2), whereas during the dry period (25 September 2016 to 4 May 2017), the main heat sink was the positive H (28.5 w/m2) rather than the negative Rnet (–10.0 w/m2).
", "ds_time_res": "日", "ds_acq_place": "Qilian Mountains, Bayi Glacier", "ds_space_res": "", "ds_projection": "", "ds_process_way": "1. Volume and profile aerodynamic methods；
\n2. Calculation of roughness length for z0m, z0h, and z0q；
\n3. Quality control and parameterization methods for z0m.", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "doi_reg_from": "reg_outside", "cstr_reg_from": "reg_outside", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "感热通量", "潜热通量", "气动粗糙度长度", "八一冰川" ], "ds_subject_tags": [ "大气科学" ], "ds_class_tags": [], "ds_locus_tags": [ "祁连山", "八一冰川" ], "ds_time_tags": [ 2016, 2017 ], "ds_contributors": [ { "true_name": "郭书海", "email": "shuhaiguo@iae.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" }, { "true_name": "韩春坛", "email": "hancht@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" }, { "true_name": "陈仁升", "email": "crs2008@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "" } ], "ds_meta_authors": [ { "true_name": "郭书海", "email": "shuhaiguo@iae.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" }, { "true_name": "韩春坛", "email": "hancht@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": "郭书海", "email": "shuhaiguo@iae.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" }, { "true_name": "陈仁升", "email": "crs2008@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "" } ], "category": "冰川" }