Biases in Reanalysis Snowfall Found by Comparing the JULES Land Surface Model to GlobSnow
Biases in Reanalysis Snowfall Found by Comparing the JULES Land Surface Model to GlobSnow
复制标题
通过比较 JULES 地表模型与 GlobSnow 发现降雪再分析中的偏差
DOI:
10.1175/jcli-d-13-00382.1
复制
发表时间:
2014
影响因子:
4.9
通讯作者:
Hancock S
中科院分区:
文献类型:
--
作者:
Hancock S
Snow exerts a strong influence on weather and climate. Accurate representation of snow processes within models is needed to ensure accurate predictions. Snow processes are known to be a weakness of land surface models (LSMs), and studies suggest that more complex snow physics is needed to avoid early melt. In this study the European Space Agency (ESA)’s Global Snow Monitoring for Climate Research (GlobSnow) snow water equivalent and NASA’s “MOD10C1” snow cover products are used to assess the accuracy of snow processes within the Joint U.K. Land Environment Simulator (JULES). JULES is run “offline” from a general circulation model and so is driven by meteorological reanalysis datasets: “Princeton,” Water and Global Change–Global Precipitation Climatology Centre (WATCH–GPCC), and WATCH–Climatic Research Unit (CRU). This reveals that when the model achieves the correct peak accumulation, snow does not melt early. However, generally snow does melt early because peak accumulation is too low. Examination of the meteorological reanalysis data shows that not enough snow falls to achieve observed peak accumulations. Thus, the earlier studies’ conclusions may be as a result of weaknesses in the driving data, rather than in model snow processes. These reanalysis products “bias correct” precipitation using observed gauge data with an undercatch correction, overriding the benefit of any other datasets used in their creation. This paper argues that using gauge data to bias-correct reanalysis data is not appropriate for snow-affected regions during winter and can lead to confusion when evaluating model processes.
登录
查看更多内容
影响因子:
13.5
作者:
S. Hancock;R. Baxter;J. Evans;B. Huntley
通讯作者:
S. Hancock;R. Baxter;J. Evans;B. Huntley
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
A. Wiltshire
通讯作者:
A. Wiltshire
影响因子:
3.2
作者:
Hall, Dorothy K.;Riggs, George A.
通讯作者:
Riggs, George A.
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
L. Kuchment;A. Gelfan;P. Romanov;Victor Demidov
通讯作者:
Victor Demidov