| GLDAS_NOAH_M.2.1水文模型在青藏高原的适定性分析 |
| |
| 引用本文： | 钱安,易爽,孙广通,王秋玲,苏占东.GLDAS_NOAH_M.2.1水文模型在青藏高原的适定性分析[J].大地测量与地球动力学,2018,38(3):254-259. |
| |
| 作者姓名： | 钱安 易爽 孙广通 王秋玲 苏占东 |
| |
| 作者单位： | 防灾科技学院防灾工程系;北海道大学理学研究院; |
| |
| 摘 要： | 利用2003-01~2016-06共162个月 GLDAS_NOAH_M.2.1、GLDAS_NOAH_M.001新旧水文模型和GRACE卫星重力数据，计算青藏高原区域水储量及总质量变化，说明GLDAS_NOAH_M.2.1水文模型相对于旧模型可提升在青藏高原区域的精度。将研究区域分为6个部分，根据3种数据分别计算6个区域的平均质量变化时间序列，顾及年周期、半年周期对该时间序列进行最小二乘拟合，估计6个区域3种数据的年振幅、年相位及相关性。结果表明，GLDAS_NOAH_M.2.1水储量变化的年振幅、年相位与GRACE总质量变化的年振幅、年相位空间分布大体一致，在青藏高原北部区域与GRACE的相关性尤为明显；GLDAS_NOAH_M.001年振幅、年相位在青藏高原北部区域存在明显异常，与GRACE的相关性很低。从长趋势质量变化来看， GLDAS新、旧模型在不同区域的差异为-6.4~4.5 Gt/a量级，而在青藏高原主体区域，新模型的质量趋势偏低10.4 Gt/a。
|
GLDAS_NOAH_M.2.1 Hydrological Model and Its Application Analysis in the Qinghai-Tibet Plateau |
| |
| QIAN An,YI Shuang,SUN Guangtong,WANG Qiuling,SU Zhandong.GLDAS_NOAH_M.2.1 Hydrological Model and Its Application Analysis in the Qinghai-Tibet Plateau[J].Journal of Geodesy and Geodynamics,2018,38(3):254-259. |
| |
| Authors: | QIAN An YI Shuang SUN Guangtong WANG Qiuling SU Zhandong |
| |
| Abstract: | A new GLDAS_NOAH_M.2.1 land water model and its old version of GLDAS_NOAH_M.001 from January 2003 and June 2016, totally 162 months, are investigated here with GRACE satellite gravimetry observations to study soil moisture and total mass change in the Qinghai-Tibet plateau. Our result shows that GLDAS_NOAH_M.2.1 has an improved precision in simulating soil moisture change. Here, 6 study regions are divided and in each region these three data sets are used to estimate mass changes, whose correlation coefficient and periodic terms are derived. Compared with GLDAS_NOAH_M.001, GLDAS_NOAH_M.2.1 has a better performance in correlation with GRACE in terms of periodic variations. The correlation between GLDAS_NOAH_M.001 and GRACE is very poor in northern Tibet, while GLDAS_NOAH_M.2.1 has improved this condition. In terms of secular mass change, GLDAS_NOAH_M.2.1 brings a difference at the order of -6.4~4.5 Gt/a in different regions and a total different of -10.4 Gt/a in the main part of Qinghai-Tibet plateau. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《大地测量与地球动力学》浏览原始摘要信息 |
| 点击此处可从《大地测量与地球动力学》下载免费的PDF全文 |
