Evaluation of the hydrological cycle in the ECHAM5 model
Evaluation of the hydrological cycle in the ECHAM5 model
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DOI：
10.1175/jcli3831.1
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发表时间：
2006-08
影响因子：
4.9
通讯作者：
S. Hagemann;K. Arpe;E. Roeckner
中科院分区：
文献类型：
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作者：
S. Hagemann;K. Arpe;E. Roeckner
本文利用马克斯·普朗克气象研究所大气环流模式(AGCM)的一个新版本，在一套模式模拟中研究了模式分辨率对水文循环的影响。通过将模型模拟与代表地球上不同气候带主要水系的若干流域的观测数据进行比较，特别重视对区域尺度上的降水的评估。结果表明，大气垂直分辨率从19层增加到31层，无论是从年平均还是从年周期来看，都对模拟降水有有利的影响。另一方面，水平分辨率增加的影响相对较小，从T63增加到T106。在更高的垂直分辨率下，在集水区的尺度上，大部分的改善是由于大规模的水分输送，而当地通过蒸发蒸腾进行的水循环的影响相对较小。在高水平线上……
Abstract This study investigates the impact of model resolution on the hydrological cycle in a suite of model simulations using a new version of the Max Planck Institute for Meteorology atmospheric general circulation model (AGCM). Special attention is paid to the evaluation of precipitation on the regional scale by comparing model simulations with observational data in a number of catchments representing the major river systems on the earth in different climate zones. It is found that an increased vertical resolution, from 19 to 31 atmospheric layers, has a beneficial effect on simulated precipitation with respect to both the annual mean and the annual cycle. On the other hand, the influence of increased horizontal resolution, from T63 to T106, is comparatively small. Most of the improvements at higher vertical resolution, on the scale of a catchment, are due to large-scale moisture transport, whereas the impact of local water recycling through evapotranspiration is somewhat smaller. At high horizontal a...