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浏览/检索结果: 共12条，第1-10条 帮助

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Key biogeochemical processes and source apportionment of nitrate in the Bohai Sea based on nitrate stable isotopes 期刊论文  OAI收割
MARINE POLLUTION BULLETIN, 2024, 卷号: 205, 页码: 12
作者:  Yu, Kairui;  Wang, Wentao;  Nie, Guangming;  Yuan, Yongquan;  Song, Xiuxian
  |  收藏  |  浏览/下载：5/0  |  提交时间：2024/09/02
基于氢氧稳定同位素技术的青藏高原典型小流域水分交换 期刊论文  OAI收割
生态学杂志, 2024, 卷号: 43, 期号: 06, 页码: 1772-1778
作者:  李婧;  张法伟;  曹广民;  郭小伟
  |  收藏  |  浏览/下载：6/0  |  提交时间：2024/11/29
Phytoplankton dominates the suspended particulate nitrogen source in the Yangtze River 期刊论文  OAI收割
JOURNAL OF HYDROLOGY, 2022, 卷号: 615, 页码: 10
作者:  Zhang, Jun;  Guo, Qingjun;  Wang, Ziteng;  Uwiringiyimana, Ernest;  Wei, Rongfei
  |  收藏  |  浏览/下载：28/0  |  提交时间：2023/01/30
Phytoplankton dominates the suspended particulate nitrogen source in the Yangtze River 期刊论文  OAI收割
JOURNAL OF HYDROLOGY, 2022, 卷号: 615, 页码: 10
作者:  Zhang, Jun;  Guo, Qingjun;  Wang, Ziteng;  Uwiringiyimana, Ernest;  Wei, Rongfei
  |  收藏  |  浏览/下载：36/0  |  提交时间：2023/01/30
Contribution of nitrogen sources to streams in mixed-use watershed varies seasonally in a temperate region 期刊论文  OAI收割
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2021, 页码: 13
作者:  Lin, Zuhong;  Liu, Junchi;  Xiao, Yong;  Yu, Chaojie;  Zhang, Jinlan
  |  收藏  |  浏览/下载：61/0  |  提交时间：2022/01/11
Identification of nitrate sources in the Jing River using dual stable isotopes, Northwest China 期刊论文  OAI收割
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2021, 页码: 9
作者:  Hu, Jing;  Pan, Mengyan;  Han, Tianhao;  Zhuang, Zhi;  Cao, Yunning
  |  收藏  |  浏览/下载：69/0  |  提交时间：2021/12/06
Towards global applicability? Erosion source discrimination across catchments using compound-specific delta C-13 isotopes 期刊论文  OAI收割
AGRICULTURE ECOSYSTEMS & ENVIRONMENT, 2018, 卷号: 256, 页码: 114-122
作者:  Christian Brandt;  Gerd Dercon;  Georg Cadisch;  Lam T. Nguyen;  Paulina Schuller
  |  收藏  |  浏览/下载：42/0  |  提交时间：2018/03/16
Stable isotope analyses of precipitation nitrogen sources in Guiyang, southwestern China 期刊论文  OAI收割
Environmental Pollution, 2017, 卷号: 230, 页码: 486-494
作者:  Xue-Yan Liu;  Hong-Wei Xiao;  Hua-Yun Xiao;  Wei Song;  Keisuke Koba
  |  收藏  |  浏览/下载：34/0  |  提交时间：2018/03/16
Design and calibration of the solar irradiance monitor (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
作者:  Yang D.-J.;  Gong C.-H.;  Wang Y.-P.;  Ye X.;  Fang W.
收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25
The solar irradiance monitor (SIM)  with the design accuracy of 5  used to monitor the secular changes of the total solar irradiance on FY-3 satellite  takes the sun-scanning measurement method on-orbit. Compared to the sun-tracking measurement method  this method simplifies the structure and cuts the cost  but the measuring accuracy is affected by the sun-synchronous orbit  sunlight incidence angle and the installing angle of the SIM in the satellite. Through the ground calibration experiment  studies on the affection of different sunlight incidence angles to the measurement accuracy. First  by the satellite tool kit (STK) simulation software  simulates the orbital parameters of the sun-synchronous satellite  and calculates the Sun ascension and declination at any time. By the orbit coordinate transformation matrix gets the components of the Sun vectors to the axes of the satellite  and base on the components designs the field of view and the installing angles of the SIM. Then  designs and completes the calibration experiment to calibrate the affection of the incidence angles. Selecting 11 different angles between the sunlight and the satellite X-axis  measures the total solar irradiance by the SIM at each angle  and compares to the irradiances of the SIAR reference radiometers  and gets the coefficient curves of the three channels of the SIM. Finally  by the quadratic fitting  gets the correction equations on the incidence angles: R 1=5.7110-52 -2.45310 -3+1.0302  R2=2.8410-5-1. 96510-3+1.0314 and R3 =1.7210 -52-4.18410-4+0.9946. The equations will aimprove the on-orbit measurement accuracy of the solar irradiance  and are very important to the on-orbit data processing after the satellite launched. 2011 SPIE.  
The Simulation measurement experiment and calibration for Solar Total Irradiance Monitor on board (EI CONFERENCE) 会议论文  OAI收割
ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China
Yupeng W.; Wei F.; Bingxi Y.
收藏  |  浏览/下载：37/0  |  提交时间：2013/03/25
STIM (Solar Total Irradiance Monitor) can be used on sun-synchronous polar orbit weather satellites to measure the total solar irradiance. It contains three independent and identical wide view absolute radiometers. They are mounted on the satellite in an angle which ensure the sun scan over the field of view of the absolute radiometers. This measurement method doesn't need the instrument tracking the sun but the sun scan over the field of view of the absolute radiometers in each orbit cycle. The paper presents the measurement method of simulation for solar irradiance measurement and calibration by mounting the instrument on a two-axis rotation table. By controlling the rotation angle velocity of the instrument in the meridian direction being the same as that of the weather satellite's on orbit  we can measure the solar irradiance when the sun scan over the field of view of the absolute radiometers to simulate the onboard state. And we have operated the measurement with the prototype of STIM. The SIAR-1 is traceable to WRR and serves as a transfer standard. So simultaneous comparison measurements between SIAR-1 and each of the three wide view absolute radiometers are measured to provide calibration corrections to the instrument. And we have a further study at the influence of stray light to the measurement results. This paper presents the method of simulation experiment and calibration for solar irradiance measurement with Solar Total Irradiance Monitor on board.