《厦门大学学报（自然科学版）》

目前东亚及其周边海域还无公开的高分辨率区域再分析资料,但对该地区的高分辨率区域再分析的需求日益增长.该文使用天气研究与预报模式(WRF)和格点统计插值(GSI)同化系统搭建东亚区域再分析系统(EARS),并用三维变分和部分循环同化的方式研制一年再分析试验数据; 进而使用气象信息综合分析处理系统(MICAPS)的站点观测资料、欧洲中期天气预报中心再分析5(ERA5)的全球再分析资料、热带降水测量任务(TRMM)的降水资料对一年试验数据进行初步评估.评估结果表明:一年再分析试验数据能较好地表征大气状况,其模拟效果接近甚至优于ERA5; 在500 hPa层面上,EARS与ERA5所得结果在环流分布上基本一致,但对青藏高原及印度季风区的模拟效果则有差异; 在降水评估中,EARS与TRMM的降水分布和强降水中心均能较好地对应.

There is no publicly available high-resolution regional reanalysis in East Asia and its nearby coastal zones.However,the demands for high-resolution regional reanalysis in this area are increasing.Using weather research and forecasting(WRF)model and gridpoint statistical interpolation(GSI),East Asian regional reanalysis system(EARS)was set up.With three-dimensional variational data assimilation and partial cycling mode,a one-year experimental dataset was generated.By comparing with meteorology information comprehensive analysis process system(MICAPS)station observation data,European Center for Medium-rarge Weather Forecasts reanalysis 5(ERA5)global reanalysis data,and tropical rainfall measuring mission(TRMM)precipitation data,the one-year experimental dataset was evaluated.The one-year experimental reanalysis dataset can represent the status of atmosphere well,and its simulation result is close to that of ERA5 and even better.At the 500 hPa level,the circulation patterns of EARS and ERA5 are virtually coincident,but the simulations over Tibetan Plateau and Indian monsoon area are different.In the precipitation assessment,the patterns of precipitation and the centers of heavy precipitation of EARS and TRMM are consistent.

引言
1 EARS介绍
2 初步评估
3 结论

表1 EARS使用的观测资料<br/>Tab.1 Observational data used in EARS

表1 EARS使用的观测资料
Tab.1 Observational data used in EARS

图1 EARS区域
Fig.1 The domain of EARS

表2 WRF模式采用的物理参数化方案<br/>Tab.2 The physical parameterization scheme used in WRF model

表2 WRF模式采用的物理参数化方案
Tab.2 The physical parameterization scheme used in WRF model

图2 EARS流程<br/>Fig.2 The workflow of EARS

图2 EARS流程
Fig.2 The workflow of EARS

表3 2015年EARS一年试验资料集与站点观测的对比统计结果<br/>Tab.3 The statistical results of the one-year EARS experimental data compared with station observations in 2015

表3 2015年EARS一年试验资料集与站点观测的对比统计结果
Tab.3 The statistical results of the one-year EARS experimental data compared with station observations in 2015

图3 地面2 m、850 hPa和500 hPa层面上温度(a～c)与相对湿度(d～f)的月变化序列<br/>Fig.3 The monthly series of the temperature(a-c)and relative humidity(d-f)on 2 m above ground, 850 hPa and 500 hPa

图3 地面2 m、850 hPa和500 hPa层面上温度(a～c)与相对湿度(d～f)的月变化序列
Fig.3 The monthly series of the temperature(a-c)and relative humidity(d-f)on 2 m above ground, 850 hPa and 500 hPa

图4 1月温度(a)、相对湿度(b)、风速(c)和位势高度(d)的统计图<br/>Fig.4 Statistical profiles of temperature(a),relative humidity(b),wind speed(c)and geopotential height(d)inJanuary

图4 1月温度(a)、相对湿度(b)、风速(c)和位势高度(d)的统计图
Fig.4 Statistical profiles of temperature(a),relative humidity(b),wind speed(c)and geopotential height(d)inJanuary

图5 4月温度(a)、相对湿度(b)、风速(c)和位势高度(d)的统计图<br/>Fig.5 Statistical profiles of temperature(a),relative humidity(b),wind speed(c)and geopotential height(d)inApril

图5 4月温度(a)、相对湿度(b)、风速(c)和位势高度(d)的统计图
Fig.5 Statistical profiles of temperature(a),relative humidity(b),wind speed(c)and geopotential height(d)inApril

图6 7月温度(a)、相对湿度(b)、风速(c)和位势高度(d)的统计图<br/>Fig.6 Statistical profiles of temperature(a),relative humidity(b),wind speed(c)and geopotential height(d)inJuly

图6 7月温度(a)、相对湿度(b)、风速(c)和位势高度(d)的统计图
Fig.6 Statistical profiles of temperature(a),relative humidity(b),wind speed(c)and geopotential height(d)inJuly

图7 10月温度(a)、相对湿度(b)、风速(c)和位势高度(d)的统计图<br/>Fig.7 Statistical profiles of temperature(a),relative humidity(b),wind speed(c)and geopotential height(d)inOctober

图7 10月温度(a)、相对湿度(b)、风速(c)和位势高度(d)的统计图
Fig.7 Statistical profiles of temperature(a),relative humidity(b),wind speed(c)and geopotential height(d)inOctober

图8 1月(a,b)、4月(c,d)、7月(e,f)和10月(g,h)EARS和ERA5的500 hPa位势高度场对比<br/>Fig.8 The comparison of geopotential height on 500 hPa between EARS and ERA5 in January(a,b),April(c,d),July(e,f)and October(g,h)

图8 1月(a,b)、4月(c,d)、7月(e,f)和10月(g,h)EARS和ERA5的500 hPa位势高度场对比
Fig.8 The comparison of geopotential height on 500 hPa between EARS and ERA5 in January(a,b),April(c,d),July(e,f)and October(g,h)

图9 1月(a,b)、4月(c,d)、7月(e,f)和10月(g,h)EARS和ERA5的500 hPa温度场对比<br/>Fig.9 The comparison of temperature on 500 hPa between EARS and ERA5 in January(a,b),April(c,d),July(e,f)and October(g,h)

图9 1月(a,b)、4月(c,d)、7月(e,f)和10月(g,h)EARS和ERA5的500 hPa温度场对比
Fig.9 The comparison of temperature on 500 hPa between EARS and ERA5 in January(a,b),April(c,d),July(e,f)and October(g,h)

图10 1月(a,b)、4月(c,d)、7月(e,f)和10月(g,h)EARS和TRMM的月平均降水对比<br/>Fig.10 The comparison of EARS and TRMM monthly average precipitation in January(a,b),April(c,d),July(e,f)and October(g,h)

图10 1月(a,b)、4月(c,d)、7月(e,f)和10月(g,h)EARS和TRMM的月平均降水对比
Fig.10 The comparison of EARS and TRMM monthly average precipitation in January(a,b),April(c,d),July(e,f)and October(g,h)

图11 中国6个沿海站点的EARS和站点观测日降水的月变化序列<br/>Fig.11 EARS and station observation monthly series of daily precipitation at six coastal stations in China

图11 中国6个沿海站点的EARS和站点观测日降水的月变化序列
Fig.11 EARS and station observation monthly series of daily precipitation at six coastal stations in China

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备注

引言

1 EARS介绍

2 初步评估

3 结论

学报简介

备注

引言

1 EARS介绍

2 初步评估

3 结 论

学报简介

3 结论