Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-018-4116-4 |
Ice versus liquid water saturation in simulations of the Indian summer monsoon | |
Glazer, Russell H.1,2; Misra, Vasubandhu1,2 | |
2018-11-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 51页码:3847-3863 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | At the same temperature, below 0 degrees C, the saturation vapor pressure (SVP) over ice is slightly less than the SVP over liquid water. Numerical models use the Clausius-Clapeyron relation to calculate the SVP and relative humidity, but there is not a consistent method for the treatment of saturation above the freezing level where ice and mixed-phase clouds may be present. In the context of current challenges presented by cloud microphysics in climate models, we argue that a better understanding of the impact that this treatment has on saturation-related processes like cloud formation and precipitation, is needed. This study explores the importance of the SVP calculation through model simulations of the Indian summer monsoon (ISM) using the regional spectral model (RSM) at 15 km grid spacing. A combination of seasonal and multiyear simulations is conducted with two saturation parameterizations. In one, the SVP over liquid water is prescribed through the entire atmospheric column (woIce), and in another the SVP over ice is used above the freezing level (wIce). When SVP over ice is prescribed, a thermodynamic drying of the middle and upper troposphere above the freezing level occurs due to increased condensation. In the wIce runs, the model responds to the slight decrease in the saturation condition by increasing, relative to the SVP over liquid water only run, grid-scale condensation of water. Increased grid-scale mean seasonal precipitation is noted across the ISM region in the simulation with SVP over ice prescribed. Modification of the middle and upper troposphere moisture results in a decrease in mean seasonal mid-level cloud amount and an increase in high cloud amount when SVP over ice is prescribed. Multiyear simulations strongly corroborate the qualitative results found in the seasonal simulations regarding the impact of ice versus liquid water SVP on the ISM's mean precipitation and moisture field. The mean seasonal rainfall difference over AllIndia between wIce and woIce is around 10% of the observed interannual variability of seasonal All India rainfall. |
英文关键词 | Indian monsoon Regional modeling Saturation vapor pressure Cloud microphysics scheme |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000447366100039 |
WOS关键词 | GENERAL-CIRCULATION MODEL ; SEA-SURFACE TEMPERATURE ; EARTH RADIATION BUDGET ; SYSTEM VERSION 2 ; INTRASEASONAL VARIABILITY ; CLOUD MICROPHYSICS ; RELATIVE-HUMIDITY ; STRATIFORM CLOUDS ; MIXED-PHASE ; CLIMATE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/36113 |
专题 | 气候变化 |
作者单位 | 1.Florida State Univ, COAPS, 2000 Levy Ave,Bldg A,Suite 209A, Tallahassee, FL 32306 USA; 2.Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA |
推荐引用方式 GB/T 7714 | Glazer, Russell H.,Misra, Vasubandhu. Ice versus liquid water saturation in simulations of the Indian summer monsoon[J]. CLIMATE DYNAMICS,2018,51:3847-3863. |
APA | Glazer, Russell H.,&Misra, Vasubandhu.(2018).Ice versus liquid water saturation in simulations of the Indian summer monsoon.CLIMATE DYNAMICS,51,3847-3863. |
MLA | Glazer, Russell H.,et al."Ice versus liquid water saturation in simulations of the Indian summer monsoon".CLIMATE DYNAMICS 51(2018):3847-3863. |
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