本数据集为在盈科绿洲、花寨子荒漠和临泽草地加密观测区利用LI-6400光合仪测量数据集。\n
\n测量参数：\n
\nLI-6400光合仪测量主要参数： CO2R_µml：参比室CO2浓度（µmol CO2 mol-1）； CO2S_µml：CO2S_µml； H2OR_mml：参比室H2O浓度（mmol H2O mol-1）； H2OS_mml：样本室 H2O浓度（mmol H2O mol-1）； Flow_CV%：Flow_µml（%）变异系数； RH_R_%：参比室相对湿度（%）； RH_S_%：样本室相对湿度 （%）； Td_R_%：参比室露点温度（C）； Td_S_%：样本室露点温度（C）； Prss_kPa：大气压力（kPa）； ParIn_µm：叶室内光合作用有效辐射（µmol m-2 s-1）； c：叶室内光合作用有效辐射（µmol m-2 s-1）； BLC_mol：总叶片边缘层导度（mol m-2 s-1）； Tblock°C：c；Tair°C：样本室温度（℃）； Tleaf°C：叶片温度（℃）； HH:MM:SS：实时时钟； Program：自动测量程序状态； CHPWMF：Status word（summary of line J）； Battery：电池电压（V）； CO2：CO2 IRGAs 状态； H2O：IRGAs 状态； Pump：泵状态； Flow：流速控制器状态； Mixr：CO2混合器状态； Fan：叶室风扇状态； Program：显示自动测量程序状态； ProgPrgs：AutoProgram step counter； FwMxCrLp：Numerical summary of the four stability flags； totalCV% ：See totalCV% under E above； CRagc_mv：Reference CO2 AGC (automatic gain control) signal，in mV； CSagc_mv：Sample CO2 AGC signal； HRagc_mv：Reference H2O AGC signal； HSagc_mv：Sample H2O AGC signal。 \n
\n测量日期与地点：\n
\n不连续观测日期：\n
\n 2008-05-20，2008-05-24，2008-05-28，2008-05-30，2008-06-04，2008-06-16，2008-06-29，2008-07-07，2008-07-11，配合各种卫星及飞行同步，在盈科绿洲与花寨子荒漠及临泽草地加密观测区用遥感所LI-6400进行了光合作用速率等光合相关参数的测量。 具体事件如下：
\n
（1）2008年5月20日盈科绿洲有TM过境，因此做了LI-6400光合仪的同步测量，测量了盈科绿洲玉米地1号、4号以及5号样地。其中1号样地测量了3株玉米，4号样地测量了5株玉米，5号样地测量了2株小麦。当时的玉米还很小，所以玉米及小麦上的每片叶子都进行了测量。
\n
（2）2008年5月24日为ASAR及MODIS同步，观测目标分别为大麦和苜蓿。
\n
（3）2008年5月28日为ASTER及MODIS同步，测量目标为盈科绿洲玉米地样地。
\n
（4）2008年5月30日为红外广角双模式成像仪（WiDAS）飞行同步，测量目标为盈科绿洲玉米地样地。
\n
（5）2008年6月4日为成像光谱仪OMIS-II飞行同步，测量目标在盈科绿洲玉米地样地。
\n
（6）2008年6月16日为成像光谱仪OMIS-II飞行同步，测量目标为盈科绿洲玉米地样地。
\n
（7）2008年6月29日为红外广角双模式成像仪（WiDAS）飞行，测量目标为盈科绿洲玉米地样地。
\n
（8）2008年7月7日为红外广角双模式成像仪（WiDAS）飞行及TM同步，测量目标为盈科绿洲玉米地样地。
\n
（9）2008年7月11日为红外广角双模式成像仪（WiDAS）飞行同步，测量目标为盈科绿洲玉米地样地。
\n
数据为从LI-6400内导出的原始格式，可以用记事本以及Microsoft Excle打开。数据中主要包括测量时间，仪器参数，以及上述LI-6400观测的主要参数，光合作用速率等光合相关参数的数据类型为浮点。
", "ds_source": "测量参数：LI-6400光合仪测量主要参数： CO2R_µml：参比室CO2浓度（µmol CO2 mol-1）； CO2S_µml：CO2S_µml； H2OR_mml：参比室H2O浓度（mmol H2O mol-1）； H2OS_mml：样本室 H2O浓度（mmol H2O mol-1）； Flow_CV%：Flow_µml（%）变异系数； RH_R_%：参比室相对湿度（%）； RH_S_%：样本室相对湿度 （%）； Td_R_%：参比室露点温度（C）； Td_S_%：样本室露点温度（C）； Prss_kPa：大气压力（kPa）； ParIn_µm：叶室内光合作用有效辐射（µmol m-2 s-1）； c：叶室内光合作用有效辐射（µmol m-2 s-1）； BLC_mol：总叶片边缘层导度（mol m-2 s-1）； Tblock°C：c；Tair°C：样本室温度（℃）； Tleaf°C：叶片温度（℃）； HH:MM:SS：实时时钟； Program：自动测量程序状态； CHPWMF：Status word（summary of line J）； Battery：电池电压（V）； CO2：CO2 IRGAs 状态； H2O：IRGAs 状态； Pump：泵状态； Flow：流速控制器状态； Mixr：CO2混合器状态； Fan：叶室风扇状态； Program：显示自动测量程序状态； ProgPrgs：AutoProgram step counter； FwMxCrLp：Numerical summary of the four stability flags； totalCV% ：See totalCV% under E above； CRagc_mv：Reference CO2 AGC (automatic gain control) signal，in mV； CSagc_mv：Sample CO2 AGC signal； HRagc_mv：Reference H2O AGC signal； HSagc_mv：Sample H2O AGC signal。
", "ds_process_way": "（1）2008年5月20日盈科绿洲有TM过境，因此做了LI-6400光合仪的同步测量，测量了盈科绿洲玉米地1号、4号以及5号样地。其中1号样地测量了3株玉米，4号样地测量了5株玉米，5号样地测量了2株小麦。当时的玉米还很小，所以玉米及小麦上的每片叶子都进行了测量。\n
\n（2）2008年5月24日为ASAR及MODIS同步，观测目标分别为大麦和苜蓿。\n
\n（3）2008年5月28日为ASTER及MODIS同步，测量目标为盈科绿洲玉米地样地。\n
\n（4）2008年5月30日为红外广角双模式成像仪（WiDAS）飞行同步，测量目标为盈科绿洲玉米地样地。\n
\n（5）2008年6月4日为成像光谱仪OMIS-II飞行同步，测量目标在盈科绿洲玉米地样地。\n
\n（6）2008年6月16日为成像光谱仪OMIS-II飞行同步，测量目标为盈科绿洲玉米地样地。\n
\n（7）2008年6月29日为红外广角双模式成像仪（WiDAS）飞行，测量目标为盈科绿洲玉米地样地。\n
\n（8）2008年7月7日为红外广角双模式成像仪（WiDAS）飞行及TM同步，测量目标为盈科绿洲玉米地样地。\n
\n（9）2008年7月11日为红外广角双模式成像仪（WiDAS）飞行同步，测量目标为盈科绿洲玉米地样地。
", "ds_quality": "数据质量良好
", "ds_acq_start_time": "2008-05-20 00:00:00", "ds_acq_end_time": "2008-07-11 00:00:00", "ds_acq_place": "黑河流域,花寨子荒漠加密观测区,中游干旱区水文试验区,盈科绿洲加密观测区,临泽草地加密观测区", "ds_acq_lon_east": 100.44305555555556, "ds_acq_lat_south": 38.04333333333333, "ds_acq_lon_west": 100.58972222222222, "ds_acq_lat_north": 38.973888888888894, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 495043, "ds_files_count": 2, "ds_format": "excel", "ds_space_res": null, "ds_time_res": "日", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": "d342768f-11cc-4254-9b58-223d5c3d907b.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "本数据由“黑河综合遥感联合试验”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": "14df1d8b-6362-4c0f-b88e-b46d4abe5db9", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "10.12072/ncdc.NIEER.db1756.2022", "subject_codes": [ "170.4510" ], "quality_level": 3, "publish_time": "2022-03-14 09:04:47", "last_updated": "2023-08-22 14:53:09", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.NIEER.2021.1721", "i18n": { "en": { "title": "Heihe River Integrated Remote Sensing joint experiment: Li-6400 photosynthesis observation data set in Yingke oasis, huazhaizi desert and Linze grassland intensive observation area", "ds_format": "Excel", "ds_source": "Measurement parameters: Li-6400 photosynthetic instrument main measurement parameters: co2r_ µ ml: CO2 concentration in reference chamber (µ mol-1); CO2S_ µml：CO2S_ µml； H2OR_ MML: H2O concentration in reference chamber (mmol-1); H2OS_ MML: H2O concentration in sample chamber (mmol-1); Flow_ CV%：Flow_ µ ml (%) coefficient of variation; RH_ R_%： Relative humidity of reference room (%); RH_ S_%： Relative humidity of sample room (%); Td_ R_%： Dew point temperature of reference chamber (c); Td_ S_%： Dew point temperature of sample chamber (c); Prss_ KPa: atmospheric pressure (kPa); ParIn_ µ M: effective radiation of photosynthesis in leaf chamber (µ mol m-2 s-1); c: Effective radiation of photosynthesis in leaf chamber (µ mol m-2 s-1); BLC_ Mol: total blade edge layer conductance (mol m-2 s-1); Tblock°C：c； TAIR ° C: temperature of sample chamber (℃); Tleaf ° C: blade temperature (℃); HH: mm: SS: real time clock; Program: automatically measure program status; CHPWMF：Status word（summary of line J）； Battery: battery voltage (V); CO2: CO2 irgas status; H2O: irgas status; Pump: pump status; Flow: flow rate controller status; Mixr: CO2 mixer status; Fan: fan status of blade chamber; Program: display the status of automatic measurement program; ProgPrgs：AutoProgram step counter； FwMxCrLp：Numerical summary of the four stability flags； totalCV% ：See totalCV% under E above； CRagc_ mv：Reference CO2 AGC (automatic gain control) signal，in mV； CSagc_ mv：Sample CO2 AGC signal； HRagc_ mv：Reference H2O AGC signal； HSagc_ mv：Sample H2O AGC signal.", "ds_quality": "
Good data quality
", "ds_ref_way": "", "ds_abstract": "This data set is measured by Li-6400 photosynthetic instrument in Yingke oasis, huazhaizi desert and Linze grassland intensive observation area.\nMeasurement parameters:\nMain parameters measured by Li-6400 photosynthetic instrument: co2r_ µ ml: CO2 concentration in reference chamber (µ mol-1); CO2S_ µml：CO2S_ µml； H2OR_ MML: H2O concentration in reference chamber (mmol-1); H2OS_ MML: H2O concentration in sample chamber (mmol-1); Flow_ CV%：Flow_ µ ml (%) coefficient of variation; RH_ R_%： Relative humidity of reference room (%); RH_ S_%： Relative humidity of sample room (%); Td_ R_%： Dew point temperature of reference chamber (c); Td_ S_%： Dew point temperature of sample chamber (c); Prss_ KPa: atmospheric pressure (kPa); ParIn_ µ M: effective radiation of photosynthesis in leaf chamber (µ mol m-2 s-1); c: Effective radiation of photosynthesis in leaf chamber (µ mol m-2 s-1); BLC_ Mol: total blade edge layer conductance (mol m-2 s-1); Tblock°C：c； TAIR ° C: temperature of sample chamber (℃); Tleaf ° C: blade temperature (℃); HH: mm: SS: real time clock; Program: automatically measure program status; CHPWMF：Status word（summary of line J）； Battery: battery voltage (V); CO2: CO2 irgas status; H2O: irgas status; Pump: pump status; Flow: flow rate controller status; Mixr: CO2 mixer status; Fan: fan status of blade chamber; Program: display the status of automatic measurement program; ProgPrgs：AutoProgram step counter； FwMxCrLp：Numerical summary of the four stability flags； totalCV% ：See totalCV% under E above； CRagc_ mv：Reference CO2 AGC (automatic gain control) signal，in mV； CSagc_ mv：Sample CO2 AGC signal； HRagc_ mv：Reference H2O AGC signal； HSagc_ mv：Sample H2O AGC signal。\nDate and place of measurement:\nDiscontinuous observation date:\n2008-05-202008-05-242008-05-282008-05-302008-06-042008-06-162008-06-292008-07-072008-07-11, in conjunction with various satellites and flight synchronization, photosynthesis rate and other photosynthetic related parameters were measured by Remote Sensing Institute Li-6400 in Yingke oasis, huazhaizi desert and Linze grassland intensive observation area. Specific events are as follows:\n(1) On May 20, 2008, there was TM transit in Yingke oasis. Therefore, the synchronous measurement of Li-6400 photosynthesis instrument was carried out, and the maize plots 1, 4 and 5 in Yingke oasis were measured. Three maize plants were measured in plot 1, five maize plants in plot 4 and two wheat plants in plot 5. At that time, corn was still very small, so every leaf on corn and wheat was measured. (2) ASAR and MODIS were synchronized on May 24, 2008. The observation targets were barley and alfalfa, respectively. (3) On May 28, 2008, aster and MODIS were synchronized, and the measurement target was Yingke oasis. (4) On May 30, 2008, the wide angle infrared dual mode imager (widas) flew synchronously, and the measurement target was the corn plot in Yingke oasis. (5) On June 4, 2008, omis-ii was used to fly synchronously, and the measurement target was in Yingke oasis. (6) On June 16, 2008, omis-ii was used for flight synchronization, and the measurement target was the corn plot in Yingke oasis. (7) On June 29th, 2008, widas was flying, and the measurement target was the corn plot in Yingke oasis. (8) On July 7, 2008, widas was flying and TM was synchronized, and the measurement target was the corn plot in Yingke oasis. (9) On July 11, 2008, the wide angle infrared dual mode imager (widas) flew synchronously, and the measurement target was the corn plot in Yingke oasis.\nThe data is in the original format exported from Li-6400 and can be opened with notepad and Microsoft Excel. The data mainly includes measurement time, instrument parameters, and the main parameters observed by Li-6400 above. The data type of photosynthetic related parameters such as photosynthetic rate is floating point.
", "ds_time_res": "日", "ds_acq_place": "Heihe River Basin, intensive observation area of huazhaizi desert, hydrological test area of arid area in the middle reaches, intensive observation area of Yingke oasis and intensive observation area of Linze grassland", "ds_space_res": "", "ds_projection": "", "ds_process_way": "（ 1) On May 20, 2008, Yingke oasis had TM transit, so the synchronous measurement of Li-6400 photosynthetic instrument was made, and the sample plots 1, 4 and 5 of Yingke oasis corn field were measured. Among them, 3 maize plants were measured in sample plot 1, 5 maize plants were measured in sample plot 4 and 2 wheat plants were measured in sample plot 5. At that time, the corn was still very small, so every leaf on corn and wheat was measured.\n
\n（ 2) ASAR and MODIS were synchronized on May 24, 2008, and the observation targets were barley and alfalfa respectively.\n
\n（ 3) On May 28, 2008, aster and MODIS were synchronized, and the measurement target was Yingke oasis corn plot.\n
\n（ 4) On May 30, 2008, it was the flight synchronization of infrared wide-angle dual-mode imager (widas), and the measurement target was Yingke oasis corn plot.\n
\n（ 5) On June 4, 2008, for the flight synchronization of imaging spectrometer omis-ii, the measurement target was in the corn sample plot of Yingke oasis.\n
\n（ 6) The flight synchronization of imaging spectrometer omis-ii was conducted on June 16, 2008, and the measurement target was Yingke oasis corn plot.\n
\n（ 7) On June 29, 2008, the flight of infrared wide-angle dual-mode imager (widas) was conducted, and the measurement target was Yingke oasis corn plot.\n
\n（ 8) On July 7, 2008, it was the flight of infrared wide-angle dual-mode imager (widas) and TM synchronization. The measurement target was Yingke oasis corn sample.\n
\n（ 9) On July 11, 2008, it was the flight synchronization of infrared wide-angle dual-mode imager (widas), and the measurement target was Yingke oasis corn plot
", "ds_ref_instruction": "\r\nThis data was generated by the \"Heihe Comprehensive Remote Sensing Joint Experiment\". When using the data, please clearly state the source of the data in the main text and cite the citation provided by this metadata in the reference section." } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "https://creativecommons.org/licenses/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": [ "光合有效辐射", "光合作用", "LI-6400光合仪", "植被", "地面遥感" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "盈科绿洲加密观测区", "花寨子荒漠加密观测区", "中游干旱区水文试验区", "黑河流域", "临泽草地加密观测区" ], "ds_time_tags": [ 2008 ], "ds_contributors": [ { "true_name": "周梦维", "email": "mengweizhou@hotmail.com", "work_for": "中国科学院遥感应用研究所", "country": "中国" }, { "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" } ], "ds_meta_authors": [ { "true_name": "周梦维", "email": "mengweizhou@hotmail.com", "work_for": "中国科学院遥感应用研究所", "country": "中国" } ], "ds_managers": [ { "true_name": "周梦维", "email": "mengweizhou@hotmail.com", "work_for": "中国科学院遥感应用研究所", "country": "中国" } ], "category": "遥感及产品" }