气候变化领域集成服务门户(CCPortal): Multitimescale variations in modeled stratospheric water vapor derived from three modern reanalysis products

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DOI	10.5194/acp-19-6509-2019
	Multitimescale variations in modeled stratospheric water vapor derived from three modern reanalysis products
	Tao M.; Konopka P.; Ploeger F.; Yan X.; Wright J.S.; Diallo M.; Fueglistaler S.; Riese M.
发表日期	2019
ISSN	16807316
起始页码	6509
结束页码	6534
卷号	19 期号:9
英文摘要	Stratospheric water vapor (SWV) plays important roles in the radiation budget and ozone chemistry and is a valuable tracer for understanding stratospheric transport. Meteorological reanalyses provide variables necessary for simulating this transport; however, even recent reanalyses are subject to substantial uncertainties, especially in the stratosphere. It is therefore necessary to evaluate the consistency among SWV distributions simulated using different input reanalysis products. In this study, we evaluate the representation of SWV and its variations on multiple timescales using simulations over the period 1980-2013. Our simulations are based on the Chemical Lagrangian Model of the Stratosphere (CLaMS) driven by horizontal winds and diabatic heating rates from three recent reanalyses: ERA-Interim, JRA-55 and MERRA-2. We present an intercomparison among these model results and observationally based estimates using a multiple linear regression method to study the annual cycle (AC), the quasi-biennial oscillation (QBO), and longer-term variability in monthly zonal-mean H2O mixing ratios forced by variations in the El Niño-Southern Oscillation (ENSO) and the volcanic aerosol burden. We find reasonable consistency among simulations of the distribution and variability in SWV with respect to the AC and QBO. However, the amplitudes of both signals are systematically weaker in the lower and middle stratosphere when CLaMS is driven by MERRA-2 than when it is driven by ERA-Interim or JRA-55. This difference is primarily attributable to relatively slow tropical upwelling in the lower stratosphere in simulations based on MERRA-2. Two possible contributors to the slow tropical upwelling in the lower stratosphere are suggested to be the large long-wave cloud radiative effect and the unique assimilation process in MERRA-2. The impacts of ENSO and volcanic aerosol on H2O entry variability are qualitatively consistent among the three simulations despite differences of 50 %-100 % in the magnitudes. Trends show larger discrepancies among the three simulations. CLaMS driven by ERA-Interim produces a neutral to slightly positive trend in H2O entry values over 1980-2013 (+0.01 ppmv decade-1), while both CLaMS driven by JRA-55 and CLaMS driven by MERRA-2 produce negative trends but with significantly different magnitudes (-0.22 and -0.08 ppmv decade-1, respectively). © Author(s) 2019.
语种	英语
scopus关键词	aerosol; atmospheric modeling; atmospheric transport; data assimilation; El Nino-Southern Oscillation; stratosphere; temporal variation; upwelling; water vapor; Bivalvia
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144411
作者单位	Forschungszentrum Jülich (IEK-7: Stratosphere), Jülich, Germany; Department of Physics, University of Wuppertal, Wuppertal, Germany; Department of Earth System Science, Tsinghua University, Beijing, China; Department of Geosciences, Princeton University, Princeton, United States
推荐引用方式 GB/T 7714	Tao M.,Konopka P.,Ploeger F.,et al. Multitimescale variations in modeled stratospheric water vapor derived from three modern reanalysis products[J],2019,19(9).
APA	Tao M..,Konopka P..,Ploeger F..,Yan X..,Wright J.S..,...&Riese M..(2019).Multitimescale variations in modeled stratospheric water vapor derived from three modern reanalysis products.Atmospheric Chemistry and Physics,19(9).
MLA	Tao M.,et al."Multitimescale variations in modeled stratospheric water vapor derived from three modern reanalysis products".Atmospheric Chemistry and Physics 19.9(2019).