Historical isotope simulation using Reanalysis atmospheric data
Historical isotope simulation using Reanalysis atmospheric data
复制标题
DOI：
10.1029/2008jd010074
复制
发表时间：
2008-10-08
影响因子：
4.4
通讯作者：
Oki, T.
中科院分区：
文献类型：
--
作者：
Yoshimura, K.;Kanamitsu, M.;Oki, T.
在本文中，我们提出了一个多年代际和全球三维稳定水同位素数据集。这是通过将稳定的水同位素的过程纳入大气环流模式，并通过应用光谱轻推技术对再分析动力场。与全球模式模拟只强迫由海表面温度（SST），动力学领域的模拟中使用的是从来没有远离观测，因为光谱轻推技术约束大尺度大气环流的观测，因此模拟的同位素场是合理的准确度在整个地球仪的日常到年际的时间尺度。作为一个例子，它揭示了目前的方法再现北极涛动更正确地比只强迫SST的模拟，因此，每月的同位素变化更好地匹配观测中纬度到高纬度地区的北方半球，特别是欧洲。这种方法在无法进行现场同位素观测的地区提供信息方面非常有用。这些信息是各种地球化学，水文和古气候研究所需的，并作为区域同位素模拟的边界和初始条件。
In this paper we present a multidecadal and global three-dimensional stable water isotope data set. This is accomplished by incorporating processes of the stable water isotopes into an atmospheric general circulation model and by applying a spectral nudging technique toward Reanalysis dynamical fields. Unlike the global model simulations forced only by sea surface temperature (SST), the dynamical fields used in the simulation are never far from observation because the spectral nudging technique constrains large-scale atmospheric circulation to that of observation, and therefore the simulated isotopic fields are reasonably accurate over the entire globe for daily to interannual time scales. As a case in point, it is revealed that the current approach reproduces the Arctic Oscillation much more correctly than the simulations forced only by SST, and consequently, the monthly isotopic variability better matches observations over midlatitudes to high latitudes in the Northern Hemisphere, especially Europe. This method is of great use in providing information in regions where in situ isotope observations are not available. Such information is required for a variety of biogeochemical, hydrological, and paleoclimate studies and as boundary and initial conditions for regional isotopic simulations.