Large ensemble of downscaled historical daily snowfall from an earth system model to 5.5 km resolution over Dronning Maud Land, Antarctica

被引：3

作者：

Ghilain, Nicolas ^{[1
]}

Vannitsem, Stephane ^{[1
]}

Dalaiden, Quentin ^{[2
]}

Goosse, Hugues ^{[2
]}

De Cruz, Lesley ^{[1
,3
]}

Wei, Wenguang ^{[4
]}

机构：

[1] Royal Meteorol Inst Belgium, Brussels, Belgium

[2] Catholic Univ Louvain, Earth & Life Inst, Georges Lemaitre Ctr Earth & Climate Res, Louvain La Neuve, Belgium

[3] Vrije Universiteit Brussel, Dept Elect & Informat, Brussels, Belgium

[4] Chinese Acad Sci, Inst Atmospher Phys, Key Lab Reg Climate Environm Temperate East Asia, Beijing, Peoples R China

来源：

EARTH SYSTEM SCIENCE DATA | 2022年 / 14卷 / 04期

关键词：

SURFACE MASS-BALANCE; ICE CORE; FIRN CORES; CLIMATE; ACCUMULATION; VARIABILITY; PRECIPITATION; TEMPERATURE; IMPACT; SHELF;

D O I：

10.5194/essd-14-1901-2022

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Y We explore a methodology to statistically downscale snowfall - the primary driver of surface mass balance in Antarctica - from an ensemble of historical (1850-present day) simulations performed with an earth system model over the coastal region of Dronning Maud Land (East Antarctica). This approach consists of associating daily snowfall simulations from a polar-oriented regional atmospheric climate model at 5.5 km spatial resolution with specific weather patterns observed over 1979-2010 CE with the atmospheric reanalyses ERAInterim and ERA5. This association is then used to generate the spatial distribution of snowfall for the period from 1850 to present day for an ensemble of 10 members from the Community Earth System Model (CESM2). The new dataset of daily and yearly snowfall accumulation based on this methodology is presented in this paper (MASS2ANT dataset; https://doi.org/10.5281/zenodo.4287517; Ghilain et al., 2021). Based on a comparison with available ice cores and spatial reconstructions, our results show that the spatio-temporal distribution of snowfall is improved in the downscaled dataset compared with the CESM2 simulations. This dataset thus provides information that may be useful in identifying the large-scale patterns associated with the local precipitation conditions and their changes over the past century.

引用

页码：1901 / 1916

页数：16

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