黑河流域光合有效辐射吸收比例数据集提供了2013-2014年的光合有效辐射吸收比例数据产品。光合有效辐射吸收比例(FPAR)是光合有效辐射穿过冠层到达地表又被反射从冠层穿出过程中被冠层吸收的光合有效辐射占全部光合有效辐射的比例，它是由植被冠层生理生态特性以及结构特性所决定。\n
\n本数据集算法在基于能量守恒的FPAR反演方法的基础上发展而来，为体现直散射辐射在冠层中路径和被吸收概率的不同，发展了一种区分直射与散射的FPAR反演模型。算法能够反演植被冠层直射部分FPAR、散射FPAR及总FPAR，反演得到的瞬时FPAR与观测FPAR间RMSE为0.0289，R2为0.8419。
", "ds_source": "本数据集算法在基于能量守恒的FPAR反演方法的基础上发展而来，为体现直散射辐射在冠层中路径和被吸收概率的不同，发展了一种区分直射与散射的FPAR反演模型。
", "ds_process_way": "算法能够反演植被冠层直射部分FPAR、散射FPAR及总FPAR，反演得到的瞬时FPAR与观测FPAR间RMSE为0.0289，R2为0.8419。
", "ds_quality": "数据质量良好
", "ds_acq_start_time": "2013-01-01 00:00:00", "ds_acq_end_time": "2015-01-01 00:00:00", "ds_acq_place": "黑河流域, 中游人工绿洲试验区, 上游寒区水文试验区, 下游天然绿洲试验区", "ds_acq_lon_east": 101.98, "ds_acq_lat_south": 37.019999999999996, "ds_acq_lon_west": 95.99, "ds_acq_lat_north": 43.01, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 28384355, "ds_files_count": 4, "ds_format": "tif", "ds_space_res": "/", "ds_time_res": "年", "ds_coordinate": "WGS84", "ds_projection": "/", "ds_thumbnail": "72bb9288-9f3f-4bc9-843e-65f95cad2f73.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "本数据由“黑河生态水文遥感试验（HiWATER）”产生，用户在使用数据时请在正文中明确声明数据的来源，并在参考文献部分引用本元数据提供的引用方式。", "ds_from_station": null, "organization_id": "c94b3578-20da-4346-9de9-c702b6ca8983", "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": "2021-09-14 09:55:03", "last_updated": "2025-06-30 16:34:45", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.NIEER.2021.4", "i18n": { "en": { "title": "Heihe River eco hydrological remote sensing test: 1km / 5-day photosynthetic effective radiation absorption ratio (FPAR) data set of Heihe River Basin (2013-2014)", "ds_format": "TIFF", "ds_source": "The data set algorithm is developed on the basis of FPAR inversion method based on energy conservation. In order to reflect the difference of path and absorption probability of direct scattered radiation in canopy, an FPAR inversion model distinguishing direct and scattering is developed
", "ds_quality": "Good data quality
", "ds_ref_way": "", "ds_abstract": "The photosynthetic effective radiation absorption ratio data set of Heihe River basin provides the photosynthetic effective radiation absorption ratio data products from 2013 to 2014. Photosynthetic effective radiation absorption ratio (FPAR) is the proportion of photosynthetic effective radiation absorbed by the canopy to all photosynthetic effective radiation in the process of photosynthetic effective radiation passing through the canopy to the surface and being reflected from the canopy. It is determined by the physiological and ecological characteristics and structural characteristics of vegetation canopy.\n
\nThe data set algorithm is developed on the basis of FPAR inversion method based on energy conservation. In order to reflect the difference of path and absorption probability of direct scattered radiation in canopy, an FPAR inversion model distinguishing direct and scattering is developed. The algorithm can retrieve the direct part, scattered FPAR and total FPAR of vegetation canopy. The RMSE between the retrieved instantaneous FPAR and the observed FPAR is 0.0289 and R2 is 0.8419
", "ds_time_res": "年", "ds_acq_place": "Heihe River Basin, artificial oasis test area in the middle reaches, hydrological test area in the upper cold area, and natural oasis test area in the lower reaches", "ds_space_res": "/", "ds_projection": "/", "ds_process_way": "The algorithm can retrieve the direct part, scattered FPAR and total FPAR of vegetation canopy. The RMSE between the retrieved instantaneous FPAR and the observed FPAR is 0.0289 and R2 is 0.8419
", "ds_ref_instruction": "This data is generated by \"Heihe eco hydrological remote sensing experiment (hiwater)\". When using the data, users should clearly state the source of the data in the text and quote the reference method provided by this metadata in the reference part." } }, "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": [ "大气遥感产品", "遥感产品", "FPAR反演模型" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域", "中游人工绿洲试验区", "上游寒区水文试验区", "下游天然绿洲试验区" ], "ds_time_tags": [ 2013, 2014 ], "ds_contributors": [ { "true_name": "李丽", "email": "lili3982@radi.ac.cn", "work_for": "中国科学院遥感与数字地球研究所遥感科学国家重点实验室", "country": "中国" }, { "true_name": "仲波", "email": "zhongbo@radi.ac.cn", "work_for": "中国科学院遥感与数字地球研究所遥感科学国家重点实验室", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "吴俊君", "email": "", "work_for": "中国科学院空天信息创新研究院遥感科学国家重点实验室", "country": "中国" } ], "ds_managers": [ { "true_name": "吴俊君", "email": "", "work_for": "中国科学院空天信息创新研究院遥感科学国家重点实验室", "country": "中国" } ], "category": "遥感及产品" }