Moist Static Energy Transport Trends in Four Global Reanalyses: Are They Downgradient?
Moist Static Energy Transport Trends in Four Global Reanalyses: Are They Downgradient?
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DOI：
10.1029/2022gl098822
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发表时间：
2022-09
影响因子：
5.2
通讯作者：
J. P. Clark;S. Feldstein;Sukyoung Lee
中科院分区：
文献类型：
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作者：
J. P. Clark;S. Feldstein;Sukyoung Lee
利用四种不同的再分析数据集，研究了1980年至2018年湿润静态能（MSE）输运的趋势。再分析数据集显示涡旋MSE输送趋势与MSE趋势的纬向结构一致，但纬向平均经向风对气候纬向平均MSE通量的影响趋势差异较大。在所有四个数据集中，后者主导了总体MSE运输趋势。因此，4个总MSE通量趋势都不是相应MSE趋势的降梯度。对MSE趋势的进一步分析表明，干静态能的增加在所有纬度都强烈地主导着MSE趋势，包括在气候模式和理论预测潜能增加主导的热带地区。在解释包括北极放大在内的气候变化时，通常假定MSE输运的变化是下梯度的，因此有必要进一步研究再分析MSE输运。
Trends in moist static energy (MSE) transport are investigated for the years 1980 through 2018 using four different reanalysis data sets. The reanalysis data sets show agreement in the eddy MSE transport trends and the latitudinal structure of the MSE trends, but vary widely in the trend of the flux of the climatological zonal mean MSE by the anomalous zonal mean meridional wind. The latter dominates the total MSE transport trends in all four data sets. Therefore, none of the four total MSE flux trends is downgradient of the corresponding MSE trend. Further analysis of the MSE trends reveals that dry static energy increases strongly dominate MSE trends at all latitudes, including in the tropics where climate models and theory predict latent energy increases to dominate. As changes in MSE transport are routinely assumed to be downgradient when interpreting changes in climate, including Arctic amplification, further investigation of reanalysis MSE transport is warranted.