GRL | 南大黄安宁教授
团队离线订正CMIP6 HighResMIP模式地表向下太阳辐射通量
南京大学大气科学学院
黄安宁教授团队在
《
Geophysical Research Letters
》
上发表
“Offline Correction of CMIP6 HighResMIP Simulated
Surface Solar Irradiance With 3D Sub
-
Grid Terrain
Radiative Effects”
一文，
采用三维次网格地形太阳辐射效应
(
3DST
S
RE)
参数化方案离线订正第六次国际耦合模式比较计划
(CMIP6)
的高分辨率模式比较计划
(HighResMIP)
的
1
1
个高分辨率全球气候模式模拟的地表向下太阳辐射通量
(
SSI)
，并参考多源卫星资料，评估了订正前后地表
S
SI
在地形复杂地区的模拟性能。
要点
-
The biases of surface solar irradiance (SSI) simulated by the CMIP6 HighResMIP models increase with the sub-grid terrain complexity
-
The biases of simulated SSI over rugged areas can be clearly reduced by the 3DSTSRE offline correction
-
The 3DSTSRE should be considered in the climate models to improve the SSI simulation over rugged areas
结果表明CMIP6 HighResMIP模拟的地表SSI的相对均方根误差(RRMSE)随着次网格地形复杂程度的提高而线性增大(由15%升至30%)，采用3DSTSRE方案离线订正后的地表SSI的RRMSE对次网格地形复杂程度变化并不敏感，维持在14%左右。这表明(1)因采用平面-平行辐射传输方案和缺乏对次网格地形辐射效应的描述，全球气候模式模拟的地表SSI普遍在地形复杂地区比在平坦地区有更大的误差；(2)3DSTSRE方案离线订正可以基本消除模拟地表SSI因数值模式缺乏对地形辐射效应描述而在地形复杂地区产生的额外误差；(3)数值模式应当考虑3DSTSRE方案，以提高它们对地形复杂地区地表能量平衡过程的描述能力。
南京大学大气科学学院博士生
顾春雷
为论文第一作者，
黄安宁
教授为通讯作者，合作者有南京气象科技创新研究院
李昕
研究员和
吴阳
助理研究员。
图1. 订正前后CMIP6 HighResMIP模式模拟2001-2014年地表向下太阳辐射通量的相对均方根误差在(130°W–180°E, 50°S–50°N)区域随网格尺度天空可见因子(SVF)分布情况。网格尺度天空可见因子越接近于0.0(1.0)，表示次网格地形越复杂(越平坦)，横坐标由左至右表示次网格地形从最平坦变为最复杂
Gu, C.
, Huang, A., Li, X., & Wu, Y. (2024). Offline correction of CMIP6 HighResMIP simulated surface solar irradiance with 3D sub-grid terrain radiative effects. Geophysical Research Letters, 51, e2023GL107737.
https://doi.org/10.1029/2023GL107737
Huang, A.,
Gu, C
., Zhang, Y., Li, W., Zhang, L., Wu, Y., . . . Cai, S. (2022). Development of a Clear‐Sky 3D Sub‐Grid Terrain Solar Radiative Effect Parameterization Scheme Based on the Mountain Radiation Theory. Journal of Geophysical Research: Atmospheres, 127(13). doi:10.1029/2022jd036449
Gu, C.
, Huang, A., Li, X., Yang, B., & Wu, Y. (2024). Construction of a Clear-sky Three Dimensional Sub-grid Terrain Long-wave Radiative Effect Parameterization Scheme under Isotropic Assumption. Journal of Geophysical Research: Atmospheres, 129, e2023JD039383. https://doi.org/10.1029/2023JD039383
Cai, S., Huang, A., Zhu, K., Guo, W., Wu, Y., &
Gu, C
. (2023). The Forecast Skill of the Summer Precipitation over Tibetan Plateau Improved by the Adoption of a 3D Sub-grid Terrain Solar Radiative Effect Scheme in a Convection-Permitting Model. Journal of Geophysical Research: Atmospheres, n/a(n/a), e2022JD038105. https://doi.org/10.1029/2022JD038105
Gu, C
., Huang, A., Zhang, Y., Yang, B., Cai, S., Xu, X., . . . Wu, Y. (2022). The Wet Bias of RegCM4 Over Tibet Plateau in Summer Reduced by Adopting the 3D Sub-Grid Terrain Solar Radiative Effect Parameterization Scheme. Journal of Geophysical Research: Atmospheres, 127(21), e2022JD037434. https://doi.org/10.1029/2022JD037434
Zhang, X., Huang, A., Dai, Y., Li, W.,
Gu, C.
, Yuan, H., . . . Cai, S. (2022). Influences of 3D Sub‐Grid Terrain Radiative Effect on the Performance of CoLM Over Heihe River Basin, Tibetan Plateau. Journal of Advances in Modeling Earth Systems, 14(1). https://doi.org/10.1029/2021ms002654
Gu, C.
, Huang, A., Wu, Y., Yang, B., Mu, X., Zhang, X., & Cai, S. (2020). Effects of Subgrid Terrain Radiative Forcing on the Ability of RegCM4.1 in the Simulation of Summer Precipitation Over China. Journal of Geophysical Research: Atmospheres, 125(12). https://doi.org/10.1029/2019jd032215
图文：顾春雷
审核：黄安宁
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